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• 12.04: Apt-Get Update: failure to fetch; can't connect to any sources

  - by weberc2

  I realize there are dozens of "apt-get update: failure to fetch" questions (I read through all I could find), but my present circumstance is unique to 12.04 and it affects all sources; not just launchpad. Additionally, I've tried several different servers in Europe and the U.S. as well as the "main server" (wherever that is) and they all yield the same result: I can't connect to any software sources. Additionally, I'm fairly certain the problem stems from the upgrade from 11.10-12.04 I performed this morning, as updates worked immediately before. Updates from the Update Manager worked fine and I could download some things (mutter) from the Software Center without incident, which makes me think I can connect to some subset of the Ubuntu servers (however, several other Ubuntu servers--like extras--and some canonical servers are listed as 'unable to connect'). Here is the output from sudo apt-get update: sudo apt-get update Ign http://ftp.u-picardie.fr precise InRelease Ign http://archive.canonical.com precise InRelease Ign http://ftp.u-picardie.fr precise-updates InRelease Ign http://ftp.u-picardie.fr precise-backports InRelease Err http://ftp.u-picardie.fr precise-security InRelease Err http://ftp.u-picardie.fr precise Release.gpg Unable to connect to ftp.u-picardie.fr:http: Err http://ftp.u-picardie.fr precise-updates Release.gpg Unable to connect to ftp.u-picardie.fr:http: Err http://ftp.u-picardie.fr precise-backports Release.gpg Unable to connect to ftp.u-picardie.fr:http: Err http://ftp.u-picardie.fr precise-security Release.gpg Unable to connect to ftp.u-picardie.fr:http: Hit http://archive.canonical.com precise Release.gpg Hit http://archive.canonical.com precise Release Hit http://archive.canonical.com precise/partner i386 Packages Ign http://archive.canonical.com precise/partner TranslationIndex Ign http://dl.google.com stable InRelease Ign http://dl.google.com stable InRelease Err http://archive.canonical.com precise/partner Translation-en_US Unable to connect to archive.canonical.com:http: [IP: 91.189.92.150 80] Err http://archive.canonical.com precise/partner Translation-en Unable to connect to archive.canonical.com:http: [IP: 91.189.92.150 80] Ign http://extras.ubuntu.com precise InRelease Get:1 http://dl.google.com stable Release.gpg [198 B] Err http://extras.ubuntu.com precise Release.gpg Could not connect to extras.ubuntu.com:80 (91.189.88.33). - connect (111: Connection refused) Ign http://ppa.launchpad.net precise InRelease Err http://ppa.launchpad.net precise InRelease Err http://ppa.launchpad.net precise InRelease Err http://ppa.launchpad.net precise InRelease Err http://ppa.launchpad.net precise InRelease Err http://ppa.launchpad.net precise InRelease Err http://ppa.launchpad.net precise InRelease Err http://ppa.launchpad.net precise InRelease Err http://ppa.launchpad.net precise InRelease Get:2 http://dl.google.com stable Release.gpg [198 B] Err http://ppa.launchpad.net precise Release.gpg Unable to connect to ppa.launchpad.net:http: Err http://ppa.launchpad.net precise Release.gpg Unable to connect to ppa.launchpad.net:http: Err http://ppa.launchpad.net precise Release.gpg Unable to connect to ppa.launchpad.net:http: Err http://ppa.launchpad.net precise Release.gpg Unable to connect to ppa.launchpad.net:http: Err http://ppa.launchpad.net precise Release.gpg Unable to connect to ppa.launchpad.net:http: Err http://ppa.launchpad.net precise Release.gpg Unable to connect to ppa.launchpad.net:http: Err http://ppa.launchpad.net precise Release.gpg Unable to connect to ppa.launchpad.net:http: Err http://ppa.launchpad.net precise Release.gpg Unable to connect to ppa.launchpad.net:http: Err http://ppa.launchpad.net precise Release.gpg Unable to connect to ppa.launchpad.net:http: Get:3 http://dl.google.com stable Release [1,347 B] Get:4 http://dl.google.com stable Release [1,347 B] Get:5 http://dl.google.com stable/main i386 Packages [1,268 B] Ign http://dl.google.com stable/main TranslationIndex Get:6 http://dl.google.com stable/main i386 Packages [769 B] Ign http://dl.google.com stable/main TranslationIndex Ign http://dl.google.com stable/main Translation-en_US Ign http://dl.google.com stable/main Translation-en Ign http://dl.google.com stable/main Translation-en_US Ign http://dl.google.com stable/main Translation-en Fetched 5,127 B in 7s (673 B/s) Reading package lists... Done W: Failed to fetch http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/dists/precise-security/InRelease W: Failed to fetch http://ppa.launchpad.net/elementary-os/stable/ubuntu/dists/precise/InRelease W: Failed to fetch http://ppa.launchpad.net/elementaryart/elementary-dev/ubuntu/dists/precise/InRelease W: Failed to fetch http://ppa.launchpad.net/midori/ppa/ubuntu/dists/precise/InRelease W: Failed to fetch http://ppa.launchpad.net/nemequ/sqlheavy/ubuntu/dists/precise/InRelease W: Failed to fetch http://ppa.launchpad.net/ricotz/docky/ubuntu/dists/precise/InRelease W: Failed to fetch http://ppa.launchpad.net/sgringwe/beatbox/ubuntu/dists/precise/InRelease W: Failed to fetch http://ppa.launchpad.net/webupd8team/y-ppa-manager/ubuntu/dists/precise/InRelease W: Failed to fetch http://ppa.launchpad.net/yorba/ppa/ubuntu/dists/precise/InRelease W: Failed to fetch http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/dists/precise/Release.gpg Unable to connect to ftp.u-picardie.fr:http: W: Failed to fetch http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/dists/precise-updates/Release.gpg Unable to connect to ftp.u-picardie.fr:http: W: Failed to fetch http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/dists/precise-backports/Release.gpg Unable to connect to ftp.u-picardie.fr:http: W: Failed to fetch http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/dists/precise-security/Release.gpg Unable to connect to ftp.u-picardie.fr:http: W: Failed to fetch http://archive.canonical.com/ubuntu/dists/precise/partner/i18n/Translation-en_US Unable to connect to archive.canonical.com:http: [IP: 91.189.92.150 80] W: Failed to fetch http://archive.canonical.com/ubuntu/dists/precise/partner/i18n/Translation-en Unable to connect to archive.canonical.com:http: [IP: 91.189.92.150 80] W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/precise/Release.gpg Could not connect to extras.ubuntu.com:80 (91.189.88.33). - connect (111: Connection refused) W: Failed to fetch http://ppa.launchpad.net/caffeine-developers/ppa/ubuntu/dists/precise/Release.gpg Unable to connect to ppa.launchpad.net:http: W: Failed to fetch http://ppa.launchpad.net/elementary-os/stable/ubuntu/dists/precise/Release.gpg Unable to connect to ppa.launchpad.net:http: W: Failed to fetch http://ppa.launchpad.net/elementaryart/elementary-dev/ubuntu/dists/precise/Release.gpg Unable to connect to ppa.launchpad.net:http: W: Failed to fetch http://ppa.launchpad.net/midori/ppa/ubuntu/dists/precise/Release.gpg Unable to connect to ppa.launchpad.net:http: W: Failed to fetch http://ppa.launchpad.net/nemequ/sqlheavy/ubuntu/dists/precise/Release.gpg Unable to connect to ppa.launchpad.net:http: W: Failed to fetch http://ppa.launchpad.net/ricotz/docky/ubuntu/dists/precise/Release.gpg Unable to connect to ppa.launchpad.net:http: W: Failed to fetch http://ppa.launchpad.net/sgringwe/beatbox/ubuntu/dists/precise/Release.gpg Unable to connect to ppa.launchpad.net:http: W: Failed to fetch http://ppa.launchpad.net/webupd8team/y-ppa-manager/ubuntu/dists/precise/Release.gpg Unable to connect to ppa.launchpad.net:http: W: Failed to fetch http://ppa.launchpad.net/yorba/ppa/ubuntu/dists/precise/Release.gpg Unable to connect to ppa.launchpad.net:http: W: Some index files failed to download. They have been ignored, or old ones used instead. W: Duplicate sources.list entry http://ppa.launchpad.net/nemequ/sqlheavy/ubuntu/ precise/main i386 Packages (/var/lib/apt/lists/ppa.launchpad.net_nemequ_sqlheavy_ubuntu_dists_precise_main_binary-i386_Packages) W: Duplicate sources.list entry http://ppa.launchpad.net/sgringwe/beatbox/ubuntu/ precise/main i386 Packages (/var/lib/apt/lists/ppa.launchpad.net_sgringwe_beatbox_ubuntu_dists_precise_main_binary-i386_Packages) Contents of /etc/apt/sources.list: # deb cdrom:[Ubuntu 11.10 _Oneiric Ocelot_ - Release i386 (20111012)]/ oneiric main restricted deb-src http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/ precise main restricted #Added by software-properties # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to # newer versions of the distribution. deb http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/ precise main restricted deb-src http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/ precise multiverse universe #Added by software-properties ## Major bug fix updates produced after the final release of the ## distribution. deb http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/ precise-updates main restricted deb-src http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/ precise-updates restricted main multiverse universe #Added by software-properties ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu ## team. Also, please note that software in universe WILL NOT receive any ## review or updates from the Ubuntu security team. deb http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/ precise universe deb http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/ precise-updates universe ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu ## team, and may not be under a free licence. Please satisfy yourself as to ## your rights to use the software. Also, please note that software in ## multiverse WILL NOT receive any review or updates from the Ubuntu ## security team. deb http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/ precise multiverse deb http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/ precise-updates multiverse ## N.B. software from this repository may not have been tested as ## extensively as that contained in the main release, although it includes ## newer versions of some applications which may provide useful features. ## Also, please note that software in backports WILL NOT receive any review ## or updates from the Ubuntu security team. deb http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/ precise-backports main restricted universe multiverse deb-src http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/ precise-backports main restricted universe multiverse #Added by software-properties deb http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/ precise-security main restricted deb-src http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/ precise-security restricted main multiverse universe #Added by software-properties deb http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/ precise-security universe deb http://ftp.u-picardie.fr/mirror/ubuntu/ubuntu/ precise-security multiverse ## Uncomment the following two lines to add software from Canonical's ## 'partner' repository. ## This software is not part of Ubuntu, but is offered by Canonical and the ## respective vendors as a service to Ubuntu users. # deb http://archive.canonical.com/ubuntu oneiric partner # deb-src http://archive.canonical.com/ubuntu oneiric partner ## This software is not part of Ubuntu, but is offered by third-party ## developers who want to ship their latest software. deb http://extras.ubuntu.com/ubuntu precise main deb-src http://extras.ubuntu.com/ubuntu precise main Testing Alternate sources.list file These are the steps I followed to produce the following output: Please backup your sources.list: sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup and then replace the contents of /etc/apt/sources.list with the below lines and run apt-get update: deb http://archive.ubuntu.com/ubuntu/ precise main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse deb http://security.ubuntu.com/ubuntu precise-security main restricted universe multiverse deb http://archive.canonical.com/ubuntu precise partner deb http://extras.ubuntu.com/ubuntu precise main Output: someone@someone-UBook:~$ sudo apt-get update Ign http://archive.canonical.com precise InRelease Hit http://archive.canonical.com precise Release.gpg Hit http://archive.canonical.com precise Release Ign http://archive.ubuntu.com precise InRelease Ign http://extras.ubuntu.com precise InRelease Ign http://archive.ubuntu.com precise-updates InRelease Hit http://archive.canonical.com precise/partner i386 Packages Hit http://extras.ubuntu.com precise Release.gpg Ign http://archive.ubuntu.com precise-backports InRelease Ign http://archive.canonical.com precise/partner TranslationIndex Err http://archive.canonical.com precise/partner Translation-en_US Unable to connect to archive.canonical.com:http: [IP: 91.189.92.150 80] Err http://archive.canonical.com precise/partner Translation-en Unable to connect to archive.canonical.com:http: [IP: 91.189.92.150 80] Hit http://extras.ubuntu.com precise Release Get:1 http://archive.ubuntu.com precise Release.gpg [198 B] Ign http://dl.google.com stable InRelease Err http://dl.google.com stable InRelease Err http://dl.google.com stable Release.gpg Unable to connect to dl.google.com:http: [IP: 173.194.34.38 80] Err http://dl.google.com stable Release.gpg Unable to connect to dl.google.com:http: [IP: 173.194.34.38 80] Get:2 http://archive.ubuntu.com precise-updates Release.gpg [198 B] Hit http://extras.ubuntu.com precise/main i386 Packages Get:3 http://archive.ubuntu.com precise-backports Release.gpg [198 B] Ign http://security.ubuntu.com precise-security InRelease Ign http://extras.ubuntu.com precise/main TranslationIndex Err http://extras.ubuntu.com precise/main Translation-en_US Unable to connect to extras.ubuntu.com:http: Err http://extras.ubuntu.com precise/main Translation-en Unable to connect to extras.ubuntu.com:http: Get:4 http://security.ubuntu.com precise-security Release.gpg [198 B] Get:5 http://archive.ubuntu.com precise Release [49.6 kB] Get:6 http://security.ubuntu.com precise-security Release [49.6 kB] Get:7 http://archive.ubuntu.com precise-updates Release [49.6 kB] Get:8 http://archive.ubuntu.com precise-backports Release [49.6 kB] Get:9 http://security.ubuntu.com precise-security/main i386 Packages [32.9 kB] Get:10 http://archive.ubuntu.com precise/main i386 Packages [1,274 kB] Get:11 http://security.ubuntu.com precise-security/restricted i386 Packages [14 B] Get:12 http://security.ubuntu.com precise-security/universe i386 Packages [8,594 B] Get:13 http://security.ubuntu.com precise-security/multiverse i386 Packages [1,393 B] Get:14 http://security.ubuntu.com precise-security/main TranslationIndex [73 B] Get:15 http://security.ubuntu.com precise-security/multiverse TranslationIndex [71 B] Get:16 http://security.ubuntu.com precise-security/restricted TranslationIndex [70 B] Get:17 http://security.ubuntu.com precise-security/universe TranslationIndex [72 B] Get:18 http://security.ubuntu.com precise-security/main Translation-en [13.6 kB] Get:19 http://security.ubuntu.com precise-security/multiverse Translation-en [587 B] Get:20 http://security.ubuntu.com precise-security/restricted Translation-en [14 B] Get:21 http://security.ubuntu.com precise-security/universe Translation-en [6,261 B] Get:22 http://archive.ubuntu.com precise/restricted i386 Packages [8,431 B] Get:23 http://archive.ubuntu.com precise/universe i386 Packages [4,796 kB] Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Ign http://ppa.launchpad.net precise InRelease Get:24 http://ppa.launchpad.net precise Release.gpg [316 B] Get:25 http://ppa.launchpad.net precise Release.gpg [316 B] Get:26 http://ppa.launchpad.net precise Release.gpg [316 B] Ign http://ppa.launchpad.net precise Release.gpg Get:27 http://ppa.launchpad.net precise Release.gpg [316 B] Hit http://ppa.launchpad.net precise Release.gpg Get:28 http://ppa.launchpad.net precise Release.gpg [316 B] Get:29 http://ppa.launchpad.net precise Release.gpg [316 B] Hit http://ppa.launchpad.net precise Release.gpg Get:30 http://ppa.launchpad.net precise Release.gpg [316 B] Hit http://ppa.launchpad.net precise Release.gpg Get:31 http://ppa.launchpad.net precise Release [11.9 kB] Get:32 http://ppa.launchpad.net precise Release [11.9 kB] Get:33 http://archive.ubuntu.com precise/multiverse i386 Packages [121 kB] Get:34 http://ppa.launchpad.net precise Release [11.9 kB] Ign http://ppa.launchpad.net precise Release Get:35 http://ppa.launchpad.net precise Release [11.9 kB] Hit http://archive.ubuntu.com precise/main TranslationIndex Hit http://archive.ubuntu.com precise/multiverse TranslationIndex Hit http://ppa.launchpad.net precise Release Hit http://archive.ubuntu.com precise/restricted TranslationIndex Get:36 http://ppa.launchpad.net precise Release [11.9 kB] Hit http://archive.ubuntu.com precise/universe TranslationIndex Get:37 http://ppa.launchpad.net precise Release [11.9 kB] Get:38 http://archive.ubuntu.com precise-updates/main i386 Packages [96.5 kB] Hit http://ppa.launchpad.net precise Release Get:39 http://ppa.launchpad.net precise Release [11.9 kB] Get:40 http://archive.ubuntu.com precise-updates/restricted i386 Packages [770 B] Hit http://ppa.launchpad.net precise Release Get:41 http://archive.ubuntu.com precise-updates/universe i386 Packages [27.7 kB] Get:42 http://ppa.launchpad.net precise/main Sources [524 B] Get:43 http://archive.ubuntu.com precise-updates/multiverse i386 Packages [1,393 B] Get:44 http://ppa.launchpad.net precise/main i386 Packages [507 B] Hit http://archive.ubuntu.com precise-updates/main TranslationIndex Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://archive.ubuntu.com precise-updates/multiverse TranslationIndex Hit http://archive.ubuntu.com precise-updates/restricted TranslationIndex Get:45 http://ppa.launchpad.net precise/main Sources [932 B] Hit http://archive.ubuntu.com precise-updates/universe TranslationIndex Get:46 http://ppa.launchpad.net precise/main i386 Packages [1,017 B] Get:47 http://archive.ubuntu.com precise-backports/main i386 Packages [559 B] Ign http://ppa.launchpad.net precise/main TranslationIndex Get:48 http://archive.ubuntu.com precise-backports/restricted i386 Packages [14 B] Get:49 http://archive.ubuntu.com precise-backports/universe i386 Packages [1,391 B] Get:50 http://ppa.launchpad.net precise/main Sources [1,402 B] Get:51 http://archive.ubuntu.com precise-backports/multiverse i386 Packages [14 B] Hit http://archive.ubuntu.com precise-backports/main TranslationIndex Get:52 http://ppa.launchpad.net precise/main i386 Packages [1,605 B] Hit http://archive.ubuntu.com precise-backports/multiverse TranslationIndex Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://archive.ubuntu.com precise-backports/restricted TranslationIndex Hit http://archive.ubuntu.com precise-backports/universe TranslationIndex Hit http://archive.ubuntu.com precise/main Translation-en Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://archive.ubuntu.com precise/multiverse Translation-en Get:53 http://ppa.launchpad.net precise/main Sources [931 B] Hit http://archive.ubuntu.com precise/restricted Translation-en Get:54 http://ppa.launchpad.net precise/main i386 Packages [1,079 B] Hit http://archive.ubuntu.com precise/universe Translation-en Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://archive.ubuntu.com precise-updates/main Translation-en Hit http://ppa.launchpad.net precise/main Sources Hit http://archive.ubuntu.com precise-updates/multiverse Translation-en Hit http://ppa.launchpad.net precise/main i386 Packages Hit http://archive.ubuntu.com precise-updates/restricted Translation-en Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://archive.ubuntu.com precise-updates/universe Translation-en Get:55 http://ppa.launchpad.net precise/main Sources [3,611 B] Hit http://archive.ubuntu.com precise-backports/main Translation-en Get:56 http://ppa.launchpad.net precise/main i386 Packages [2,468 B] Hit http://archive.ubuntu.com precise-backports/multiverse Translation-en Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://archive.ubuntu.com precise-backports/restricted Translation-en Hit http://archive.ubuntu.com precise-backports/universe Translation-en Get:57 http://ppa.launchpad.net precise/main Sources [1,524 B] Get:58 http://ppa.launchpad.net precise/main i386 Packages [2,719 B] Ign http://ppa.launchpad.net precise/main TranslationIndex Hit http://ppa.launchpad.net precise/main Sources Hit http://ppa.launchpad.net precise/main i386 Packages Ign http://ppa.launchpad.net precise/main TranslationIndex Get:59 http://ppa.launchpad.net precise/main Sources [1,052 B] Get:60 http://ppa.launchpad.net precise/main i386 Packages [1,388 B] Ign http://ppa.launchpad.net precise/main TranslationIndex Get:61 http://ppa.launchpad.net precise/main Sources [1,185 B] Get:62 http://ppa.launchpad.net precise/main i386 Packages [1,698 B] Ign http://ppa.launchpad.net precise/main TranslationIndex Err http://ppa.launchpad.net precise/main Sources 404 Not Found Err http://ppa.launchpad.net precise/main i386 Packages 404 Not Found Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Ign http://ppa.launchpad.net precise/main Translation-en_US Ign http://ppa.launchpad.net precise/main Translation-en Fetched 6,699 kB in 15s (445 kB/s) Reading package lists... Done W: Failed to fetch http://dl.google.com/linux/talkplugin/deb/dists/stable/InRelease W: Failed to fetch http://archive.canonical.com/ubuntu/dists/precise/partner/i18n/Translation-en_US Unable to connect to archive.canonical.com:http: [IP: 91.189.92.150 80] W: Failed to fetch http://archive.canonical.com/ubuntu/dists/precise/partner/i18n/Translation-en Unable to connect to archive.canonical.com:http: [IP: 91.189.92.150 80] W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/sta

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• Red Gate Coder interviews: Alex Davies

  - by Michael Williamson

  Alex Davies has been a software engineer at Red Gate since graduating from university, and is currently busy working on .NET Demon. We talked about tackling parallel programming with his actors framework, a scientific approach to debugging, and how JavaScript is going to affect the programming languages we use in years to come. So, if we start at the start, how did you get started in programming? When I was seven or eight, I was given a BBC Micro for Christmas. I had asked for a Game Boy, but my dad thought it would be better to give me a proper computer. For a year or so, I only played games on it, but then I found the user guide for writing programs in it. I gradually started doing more stuff on it and found it fun. I liked creating. As I went into senior school I continued to write stuff on there, trying to write games that weren’t very good. I got a real computer when I was fourteen and found ways to write BASIC on it. Visual Basic to start with, and then something more interesting than that. How did you learn to program? Was there someone helping you out? Absolutely not! I learnt out of a book, or by experimenting. I remember the first time I found a loop, I was like “Oh my God! I don’t have to write out the same line over and over and over again any more. It’s amazing!” When did you think this might be something that you actually wanted to do as a career? For a long time, I thought it wasn’t something that you would do as a career, because it was too much fun to be a career. I thought I’d do chemistry at university and some kind of career based on chemical engineering. And then I went to a careers fair at school when I was seventeen or eighteen, and it just didn’t interest me whatsoever. I thought “I could be a programmer, and there’s loads of money there, and I’m good at it, and it’s fun”, but also that I shouldn’t spoil my hobby. Now I don’t really program in my spare time any more, which is a bit of a shame, but I program all the rest of the time, so I can live with it. Do you think you learnt much about programming at university? Yes, definitely! I went into university knowing how to make computers do anything I wanted them to do. However, I didn’t have the language to talk about algorithms, so the algorithms course in my first year was massively important. Learning other language paradigms like functional programming was really good for breadth of understanding. Functional programming influences normal programming through design rather than actually using it all the time. I draw inspiration from it to write imperative programs which I think is actually becoming really fashionable now, but I’ve been doing it for ages. I did it first! There were also some courses on really odd programming languages, a bit of Prolog, a little bit of C. Having a little bit of each of those is something that I would have never done on my own, so it was important. And then there are knowledge-based courses which are about not programming itself but things that have been programmed like TCP. Those are really important for examples for how to approach things. Did you do any internships while you were at university? Yeah, I spent both of my summers at the same company. I thought I could code well before I went there. Looking back at the crap that I produced, it was only surpassed in its crappiness by all of the other code already in that company. I’m so much better at writing nice code now than I used to be back then. Was there just not a culture of looking after your code? There was, they just didn’t hire people for their abilities in that area. They hired people for raw IQ. The first indicator of it going wrong was that they didn’t have any computer scientists, which is a bit odd in a programming company. But even beyond that they didn’t have people who learnt architecture from anyone else. Most of them had started straight out of university, so never really had experience or mentors to learn from. There wasn’t the experience to draw from to teach each other. In the second half of my second internship, I was being given tasks like looking at new technologies and teaching people stuff. Interns shouldn’t be teaching people how to do their jobs! All interns are going to have little nuggets of things that you don’t know about, but they shouldn’t consistently be the ones who know the most. It’s not a good environment to learn. I was going to ask how you found working with people who were more experienced than you… When I reached Red Gate, I found some people who were more experienced programmers than me, and that was difficult. I’ve been coding since I was tiny. At university there were people who were cleverer than me, but there weren’t very many who were more experienced programmers than me. During my internship, I didn’t find anyone who I classed as being a noticeably more experienced programmer than me. So, it was a shock to the system to have valid criticisms rather than just formatting criticisms. However, Red Gate’s not so big on the actual code review, at least it wasn’t when I started. We did an entire product release and then somebody looked over all of the UI of that product which I’d written and say what they didn’t like. By that point, it was way too late and I’d disagree with them. Do you think the lack of code reviews was a bad thing? I think if there’s going to be any oversight of new people, then it should be continuous rather than chunky. For me I don’t mind too much, I could go out and get oversight if I wanted it, and in those situations I felt comfortable without it. If I was managing the new person, then maybe I’d be keener on oversight and then the right way to do it is continuously and in very, very small chunks. Have you had any significant projects you’ve worked on outside of a job? When I was a teenager I wrote all sorts of stuff. I used to write games, I derived how to do isomorphic projections myself once. I didn’t know what the word was so I couldn’t Google for it, so I worked it out myself. It was horrifically complicated. But it sort of tailed off when I started at university, and is now basically zero. If I do side-projects now, they tend to be work-related side projects like my actors framework, NAct, which I started in a down tools week. Could you explain a little more about NAct? It is a little C# framework for writing parallel code more easily. Parallel programming is difficult when you need to write to shared data. Sometimes parallel programming is easy because you don’t need to write to shared data. When you do need to access shared data, you could just have your threads pile in and do their work, but then you would screw up the data because the threads would trample on each other’s toes. You could lock, but locks are really dangerous if you’re using more than one of them. You get interactions like deadlocks, and that’s just nasty. Actors instead allows you to say this piece of data belongs to this thread of execution, and nobody else can read it. If you want to read it, then ask that thread of execution for a piece of it by sending a message, and it will send the data back by a message. And that avoids deadlocks as long as you follow some obvious rules about not making your actors sit around waiting for other actors to do something. There are lots of ways to write actors, NAct allows you to do it as if it was method calls on other objects, which means you get all the strong type-safety that C# programmers like. Do you think that this is suitable for the majority of parallel programming, or do you think it’s only suitable for specific cases? It’s suitable for most difficult parallel programming. If you’ve just got a hundred web requests which are all independent of each other, then I wouldn’t bother because it’s easier to just spin them up in separate threads and they can proceed independently of each other. But where you’ve got difficult parallel programming, where you’ve got multiple threads accessing multiple bits of data in multiple ways at different times, then actors is at least as good as all other ways, and is, I reckon, easier to think about. When you’re using actors, you presumably still have to write your code in a different way from you would otherwise using single-threaded code. You can’t use actors with any methods that have return types, because you’re not allowed to call into another actor and wait for it. If you want to get a piece of data out of another actor, then you’ve got to use tasks so that you can use “async” and “await” to await asynchronously for it. But other than that, you can still stick things in classes so it’s not too different really. Rather than having thousands of objects with mutable state, you can use component-orientated design, where there are only a few mutable classes which each have a small number of instances. Then there can be thousands of immutable objects. If you tend to do that anyway, then actors isn’t much of a jump. If I’ve already built my system without any parallelism, how hard is it to add actors to exploit all eight cores on my desktop? Usually pretty easy. If you can identify even one boundary where things look like messages and you have components where some objects live on one side and these other objects live on the other side, then you can have a granddaddy object on one side be an actor and it will parallelise as it goes across that boundary. Not too difficult. If we do get 1000-core desktop PCs, do you think actors will scale up? It’s hard. There are always in the order of twenty to fifty actors in my whole program because I tend to write each component as actors, and I tend to have one instance of each component. So this won’t scale to a thousand cores. What you can do is write data structures out of actors. I use dictionaries all over the place, and if you need a dictionary that is going to be accessed concurrently, then you could build one of those out of actors in no time. You can use queuing to marshal requests between different slices of the dictionary which are living on different threads. So it’s like a distributed hash table but all of the chunks of it are on the same machine. That means that each of these thousand processors has cached one small piece of the dictionary. I reckon it wouldn’t be too big a leap to start doing proper parallelism. Do you think it helps if actors get baked into the language, similarly to Erlang? Erlang is excellent in that it has thread-local garbage collection. C# doesn’t, so there’s a limit to how well C# actors can possibly scale because there’s a single garbage collected heap shared between all of them. When you do a global garbage collection, you’ve got to stop all of the actors, which is seriously expensive, whereas in Erlang garbage collections happen per-actor, so they’re insanely cheap. However, Erlang deviated from all the sensible language design that people have used recently and has just come up with crazy stuff. You can definitely retrofit thread-local garbage collection to .NET, and then it’s quite well-suited to support actors, even if it’s not baked into the language. Speaking of language design, do you have a favourite programming language? I’ll choose a language which I’ve never written before. I like the idea of Scala. It sounds like C#, only with some of the niggles gone. I enjoy writing static types. It means you don’t have to writing tests so much. When you say it doesn’t have some of the niggles? C# doesn’t allow the use of a property as a method group. It doesn’t have Scala case classes, or sum types, where you can do a switch statement and the compiler checks that you’ve checked all the cases, which is really useful in functional-style programming. Pattern-matching, in other words. That’s actually the major niggle. C# is pretty good, and I’m quite happy with C#. And what about going even further with the type system to remove the need for tests to something like Haskell? Or is that a step too far? I’m quite a pragmatist, I don’t think I could deal with trying to write big systems in languages with too few other users, especially when learning how to structure things. I just don’t know anyone who can teach me, and the Internet won’t teach me. That’s the main reason I wouldn’t use it. If I turned up at a company that writes big systems in Haskell, I would have no objection to that, but I wouldn’t instigate it. What about things in C#? For instance, there’s contracts in C#, so you can try to statically verify a bit more about your code. Do you think that’s useful, or just not worthwhile? I’ve not really tried it. My hunch is that it needs to be built into the language and be quite mathematical for it to work in real life, and that doesn’t seem to have ended up true for C# contracts. I don’t think anyone who’s tried them thinks they’re any good. I might be wrong. On a slightly different note, how do you like to debug code? I think I’m quite an odd debugger. I use guesswork extremely rarely, especially if something seems quite difficult to debug. I’ve been bitten spending hours and hours on guesswork and not being scientific about debugging in the past, so now I’m scientific to a fault. What I want is to see the bug happening in the debugger, to step through the bug happening. To watch the program going from a valid state to an invalid state. When there’s a bug and I can’t work out why it’s happening, I try to find some piece of evidence which places the bug in one section of the code. From that experiment, I binary chop on the possible causes of the bug. I suppose that means binary chopping on places in the code, or binary chopping on a stage through a processing cycle. Basically, I’m very stupid about how I debug. I won’t make any guesses, I won’t use any intuition, I will only identify the experiment that’s going to binary chop most effectively and repeat rather than trying to guess anything. I suppose it’s quite top-down. Is most of the time then spent in the debugger? Absolutely, if at all possible I will never debug using print statements or logs. I don’t really hold much stock in outputting logs. If there’s any bug which can be reproduced locally, I’d rather do it in the debugger than outputting logs. And with SmartAssembly error reporting, there’s not a lot that can’t be either observed in an error report and just fixed, or reproduced locally. And in those other situations, maybe I’ll use logs. But I hate using logs. You stare at the log, trying to guess what’s going on, and that’s exactly what I don’t like doing. You have to just look at it and see does this look right or wrong. We’ve covered how you get to grip with bugs. How do you get to grips with an entire codebase? I watch it in the debugger. I find little bugs and then try to fix them, and mostly do it by watching them in the debugger and gradually getting an understanding of how the code works using my process of binary chopping. I have to do a lot of reading and watching code to choose where my slicing-in-half experiment is going to be. The last time I did it was SmartAssembly. The old code was a complete mess, but at least it did things top to bottom. There wasn’t too much of some of the big abstractions where flow of control goes all over the place, into a base class and back again. Code’s really hard to understand when that happens. So I like to choose a little bug and try to fix it, and choose a bigger bug and try to fix it. Definitely learn by doing. I want to always have an aim so that I get a little achievement after every few hours of debugging. Once I’ve learnt the codebase I might be able to fix all the bugs in an hour, but I’d rather be using them as an aim while I’m learning the codebase. If I was a maintainer of a codebase, what should I do to make it as easy as possible for you to understand? Keep distinct concepts in different places. And name your stuff so that it’s obvious which concepts live there. You shouldn’t have some variable that gets set miles up the top of somewhere, and then is read miles down to choose some later behaviour. I’m talking from a very much SmartAssembly point of view because the old SmartAssembly codebase had tons and tons of these things, where it would read some property of the code and then deal with it later. Just thousands of variables in scope. Loads of things to think about. If you can keep concepts separate, then it aids me in my process of fixing bugs one at a time, because each bug is going to more or less be understandable in the one place where it is. And what about tests? Do you think they help at all? I’ve never had the opportunity to learn a codebase which has had tests, I don’t know what it’s like! What about when you’re actually developing? How useful do you find tests in finding bugs or regressions? Finding regressions, absolutely. Running bits of code that would be quite hard to run otherwise, definitely. It doesn’t happen very often that a test finds a bug in the first place. I don’t really buy nebulous promises like tests being a good way to think about the spec of the code. My thinking goes something like “This code works at the moment, great, ship it! Ah, there’s a way that this code doesn’t work. Okay, write a test, demonstrate that it doesn’t work, fix it, use the test to demonstrate that it’s now fixed, and keep the test for future regressions.” The most valuable tests are for bugs that have actually happened at some point, because bugs that have actually happened at some point, despite the fact that you think you’ve fixed them, are way more likely to appear again than new bugs are. Does that mean that when you write your code the first time, there are no tests? Often. The chance of there being a bug in a new feature is relatively unaffected by whether I’ve written a test for that new feature because I’m not good enough at writing tests to think of bugs that I would have written into the code. So not writing regression tests for all of your code hasn’t affected you too badly? There are different kinds of features. Some of them just always work, and are just not flaky, they just continue working whatever you throw at them. Maybe because the type-checker is particularly effective around them. Writing tests for those features which just tend to always work is a waste of time. And because it’s a waste of time I’ll tend to wait until a feature has demonstrated its flakiness by having bugs in it before I start trying to test it. You can get a feel for whether it’s going to be flaky code as you’re writing it. I try to write it to make it not flaky, but there are some things that are just inherently flaky. And very occasionally, I’ll think “this is going to be flaky” as I’m writing, and then maybe do a test, but not most of the time. How do you think your programming style has changed over time? I’ve got clearer about what the right way of doing things is. I used to flip-flop a lot between different ideas. Five years ago I came up with some really good ideas and some really terrible ideas. All of them seemed great when I thought of them, but they were quite diverse ideas, whereas now I have a smaller set of reliable ideas that are actually good for structuring code. So my code is probably more similar to itself than it used to be back in the day, when I was trying stuff out. I’ve got more disciplined about encapsulation, I think. There are operational things like I use actors more now than I used to, and that forces me to use immutability more than I used to. The first code that I wrote in Red Gate was the memory profiler UI, and that was an actor, I just didn’t know the name of it at the time. I don’t really use object-orientation. By object-orientation, I mean having n objects of the same type which are mutable. I want a constant number of objects that are mutable, and they should be different types. I stick stuff in dictionaries and then have one thing that owns the dictionary and puts stuff in and out of it. That’s definitely a pattern that I’ve seen recently. I think maybe I’m doing functional programming. Possibly. It’s plausible. If you had to summarise the essence of programming in a pithy sentence, how would you do it? Programming is the form of art that, without losing any of the beauty of architecture or fine art, allows you to produce things that people love and you make money from. So you think it’s an art rather than a science? It’s a little bit of engineering, a smidgeon of maths, but it’s not science. Like architecture, programming is on that boundary between art and engineering. If you want to do it really nicely, it’s mostly art. You can get away with doing architecture and programming entirely by having a good engineering mind, but you’re not going to produce anything nice. You’re not going to have joy doing it if you’re an engineering mind. Architects who are just engineering minds are not going to enjoy their job. I suppose engineering is the foundation on which you build the art. Exactly. How do you think programming is going to change over the next ten years? There will be an unfortunate shift towards dynamically-typed languages, because of JavaScript. JavaScript has an unfair advantage. JavaScript’s unfair advantage will cause more people to be exposed to dynamically-typed languages, which means other dynamically-typed languages crop up and the best features go into dynamically-typed languages. Then people conflate the good features with the fact that it’s dynamically-typed, and more investment goes into dynamically-typed languages. They end up better, so people use them. What about the idea of compiling other languages, possibly statically-typed, to JavaScript? It’s a reasonable idea. I would like to do it, but I don’t think enough people in the world are going to do it to make it pick up. The hordes of beginners are the lifeblood of a language community. They are what makes there be good tools and what makes there be vibrant community websites. And any particular thing which is the same as JavaScript only with extra stuff added to it, although it might be technically great, is not going to have the hordes of beginners. JavaScript is always to be quickest and easiest way for a beginner to start programming in the browser. And dynamically-typed languages are great for beginners. Compilers are pretty scary and beginners don’t write big code. And having your errors come up in the same place, whether they’re statically checkable errors or not, is quite nice for a beginner. If someone asked me to teach them some programming, I’d teach them JavaScript. If dynamically-typed languages are great for beginners, when do you think the benefits of static typing start to kick in? The value of having a statically typed program is in the tools that rely on the static types to produce a smooth IDE experience rather than actually telling me my compile errors. And only once you’re experienced enough a programmer that having a really smooth IDE experience makes a blind bit of difference, does static typing make a blind bit of difference. So it’s not really about size of codebase. If I go and write up a tiny program, I’m still going to get value out of writing it in C# using ReSharper because I’m experienced with C# and ReSharper enough to be able to write code five times faster if I have that help. Any other visions of the future? Nobody’s going to use actors. Because everyone’s going to be running on single-core VMs connected over network-ready protocols like JSON over HTTP. So, parallelism within one operating system is going to die. But until then, you should use actors. More Red Gater Coder interviews

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• CodePlex Daily Summary for Saturday, January 01, 2011

  CodePlex Daily Summary for Saturday, January 01, 2011Popular ReleasesBloodSim: BloodSim - 1.3.0.0: - Added tally for number of boss swings and swing avoids - Removed a large number of options that were carried over from Beta and are no longer relevant - Changed stat entry to use Rating format for Dodge, Parry, Haste and Mastery - Rearranged Settings interface - BloodSim will now check for updates on startup and notify the user if a new version is available - Added option to Show/Hide the Simulation Log to increase speed during large simulationsEnhSim: EnhSim 2.2.8 ALPHA: 2.2.8 ALPHAThis release supports WoW patch 4.03a at level 85 To use this release, you must have the Microsoft Visual C++ 2010 Redistributable Package installed. This can be downloaded from http://www.microsoft.com/downloads/en/details.aspx?FamilyID=A7B7A05E-6DE6-4D3A-A423-37BF0912DB84 To use the GUI you must have the .NET 4.0 Framework installed. This can be downloaded from http://www.microsoft.com/downloads/en/details.aspx?FamilyID=9cfb2d51-5ff4-4491-b0e5-b386f32c0992 Rebuilt Feral Spir...CBM-Command: Version 2.0 Beta 2 - 2010-12-31: This version fixes three major bugs in Version 2.0 Beta 1 Changes(64, 128, Plus/4) Changed the timing code back to version 1.7 because the clock() function in cc65 does not reflect accurate timing. (VIC, PET) The time(NULL) function is not available on these targets and thus had to be removed. Help Hot-Key Fixed - Now when you press either F1 or H you get the help file (if the CBM-Command disk is in the drive you started CBM-Command from). Updated Help File - the new help file by popmi...Free Silverlight & WPF Chart Control - Visifire: Visifire SL and WPF Charts v3.6.6 Released: Hi, Today we are releasing final version of Visifire, v3.6.6 with the following new feature: * TextDecorations property is implemented in Title for Chart. * TitleTextDecorations property is implemented in Axis. * MinPointHeight property is now applicable for Column and Bar Charts. Also this release includes few bug fixes: * ToolTipText property of DataSeries was not getting applied from Style. * Chart threw exception if IndicatorEnabled property was set to true and Too...StyleCop Compliant Visual Studio Code Snippets: Visual Studio Code Snippets - January 2011: StyleCop Compliant Visual Studio Code Snippets Visual Studio 2010 provides C# developers with 38 code snippets, enhancing developer productivty and increasing the consistency of the code. Within this project the original code snippets have been refactored to provide StyleCop compliant versions of the original code snippets while also adding many new code snippets. Within the January 2011 release you'll find 82 code snippets to make you more productive and the code you write more consistent!...WPF Application Framework (WAF): WPF Application Framework (WAF) 2.0.0.2: Version: 2.0.0.2 (Milestone 2): This release contains the source code of the WPF Application Framework (WAF) and the sample applications. Requirements .NET Framework 4.0 (The package contains a solution file for Visual Studio 2010) The unit test projects require Visual Studio 2010 Professional Remark The sample applications are using Microsoft’s IoC container MEF. However, the WPF Application Framework (WAF) doesn’t force you to use the same IoC container in your application. You can use ...eCompany: eCompany v0.2.0 Build 63: Version 0.2.0 Build 63: Added Splash screen & about box Added downloading of currencies when eCompany launched for the first time (must close any bug caused by no currency rate existing) Added corp creation when eCompany launched for the first time (for now, you didn't need to edit the company.xml file manually) You just need to decompress file "eCompany v0.2.0.63.zip" into your current eCompany install directory.SQL Monitor - tracking sql server activities: SQL Monitor 3.0 alpha 8: 1. added truncate table/defrag index/check db functions 2. improved alert 3. fixed problem with alert causing config file corrupted(hopefully)Temporary Data Storage Folder: TDS Folder version 0.2 Beta: In this release following bugs are fixed: 'Send to' entry bug fixed Preferences bug fixedSilverlight File Upload and Download with Interlink: HSS Interlink v.2.1.300: Latest Release 2.1.300 - December 29th 2010 Change Log DownloadFileDialog Modified to support an absolute uri for the DownloadUri property, which is required for OOB support UploadFileDialog Modified to support an absolute uri for the UploadUri property, which is required for OOB support For existing users be sure to uninstall the older version prior to installing this version Note: The demo application is NOT included with the installer but can be reviewed here Stable release and ready...RDPAddins .NET: RDPAddins Alpha 2 (0.2.0.0): Second alpha release... Breaking changes (now this project has 0.2 version): now addin should implement RDPAddins.Common.IAddin and should me exported with RDPAddins.Common.AddinMetadataAtrribute !!!most of all old Addin base class method you can fide in IChannel or IUI interfeces see FileTransferAddin Now RDPAddins.Common.dll just provide interfaces for addin, channel, ui, and export metadata Whole implementation is in RDPAddins.exe RDPAddins.Common.dll has some documentation :) why all this...DocX: DocX v1.0.0.11: Building Examples projectTo build the Examples project, download DocX.dll and add it as a reference to the project. OverviewThis version of DocX contains many bug fixes, it is a serious step towards a stable release. Added1) Unit testing project, 2) Examples project, 3) To many bug fixes to list here, see the source code change list history.Cosmos (C# Open Source Managed Operating System): 71406: This is the second release supporting the full line of Visual Studio 2010 editions. Changes since release 71246 include: Debug info is now stored in a single .cpdb file (which is a Firebird database) Keyboard input works now (using Console.ReadLine) Console colors work (using Console.ForegroundColor and .BackgroundColor)AutoLoL: AutoLoL v1.5.0: Added the all new Masteries Browser which replaces the Quick Open combobox AutoLoL will now attemt to create file associations for mastery (*.lolm) files Each Mastery Build can now contain keywords that the Masteries Browser will use for filtering Changed the way AutoLoL detects if another instance is already running Changed the format of the mastery files to allow more information stored in* Dialogs will now focus the Ok or Cancel button which allows the user to press Return to clo...Paint.NET PSD Plugin: 1.6.0: Handling of layer masks has been greatly improved. Improved reliability. Many PSD files that previously loaded in as garbage will now load in correctly. Parallelized loading. PSD files containing layer masks will load in a bit quicker thanks to the removal of the sequential bottleneck. Hidden layers are no longer made visible on save. Many thanks to the users who helped expose the layer masks problem: Rob Horowitz, M_Lyons10. Please keep sending in those bug reports and PSD repro files!Facebook C# SDK: 4.1.1: From 4.1.1 Release: Authentication bug fix caused by facebook change (error with redirects in Safari) Authenticator fix, always returning true From 4.1.0 Release Lots of bug fixes Removed Dynamic Runtime Language dependencies from non-dynamic platforms. Samples included in release for ASP.NET, MVC, Silverlight, Windows Phone 7, WPF, WinForms, and one Visual Basic Sample Changed internal serialization to use Json.net BREAKING CHANGE: Canvas Session is no longer supported. Use Signed...Catel - WPF and Silverlight MVVM library: 1.0.0: And there it is, the final release of Catel, and it is no longer a beta version!Euro for Windows XP: ChangeRegionalSettings 1..0: *Rocket Framework (.Net 4.0): Rocket Framework for Windows V 1.0.0: Architecture is reviewed and adjusted in a way so that I can introduce the Web version and WPF version of this framework next. - Rocket.Core is introduced - Controller button functions revisited and updated - DB is renewed to suite the implemented features - Create New button functionality is changed - Add Question Handling featuresFlickr Wallpaper Rotator (for Windows desktop): Wallpaper Flickr 1.1: Some minor bugfixes (mostly covering when network connection is flakey, so I discovered them all while at my parents' house for Christmas).New Projects7-Up: PowerShell Scripts for Upgrading SharePoint 2007 to 2010: PowerShell scripts to automate the upgrade of SharePoint 2007 to SharePoint 2010 using a content database or hybrid upgrade approach.Apple Wireless Keyboard: Helper that Allows people use the Apple Wireless (or Wired possibly) Keyboard under Windows 7 without loosing the mac functionalityckTest: testtesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttestCrude - .Net Dependency Management: Crude is light dependency management for .net, there was no dependency management solution for .net as Maven or Ivy until now. DeepTime: Event tacking, management and plotting site.Dev/Test Cloud Platform: Dev/Test Cloud Platform is implemented by Beyondsoft and Microsoft. The platform is dedicated to software development and test scenarios. With Dev/Test Cloud you can save your cost, improve work efficiency, and improve product quality.Image Viewer (wpf version): Image viewer helps windows users to review images on their computer. It is written i Csharp and wpf.LNOne: All common code, framework code, utility code in one.LOGL::GLib: LOGL::GLib is an OpenGL game library written in C++ that allows new C++/OpenGL programmers to focus more on the game and less on the details.MAPI.GUI: Graphical program uses function from mcopyapi.codeplex.com and mdeleteapi.codeplex.com console programs. Program support longPath (above 259 chars and less 32000 chars)Movie Collection Manager: Gerenciador que ajuda a manusear coleção de filmes. Possui uma interface super atraente e simples de usar. Ferramentas e tecnologias usadas: - Visual C# 2010 Express - SQL Server 2008 R2 Express - Windows Forms - Entity Framework OBS: Projeto concorrente do Desafio .NETMyStudioServer.com: Source code for the DotNetNuke http://MyStudioServer.com websiteNusya Tester: A software to create and use various tests with right answers explanations to help one in self-education. It's developed in C#Project Zylaphon: Project Zylaphon is a C# GPL Open Source Computer Aided Music Composition System. Its design goals include highly interactive composition, music computation, and analysis; system control to be provided by an A.I. goal based agenda and quasi Blackboard for maximum flexibility.Remember The Task: RememberTheTask makes it easier to remember what you have been doing the last hour. It's developed in Visual Basic.Rent Payments Scheduling: Register rent schedules and keep track of them.Simple MVVM Toolkit for Silverlight: Simple MVVM Toolkit makes it easier to develop Silverlight applications using the Model-View-ViewModel design pattern.Sparrow.NET HtmlTemplate: Its a template engine for generating web pages.(?????HTML?????，??????html Tag???????html????。)SQLDiagUI: SQLDiagUI provides a GUI for Microsoft SQlDiag Utility which allows users to create a configuration file and start/stop/schedule SQLDiag against a SQL Server.Test Control: testing frameworkTwicko: Simple twitter client.Unity3D Utilities: Unity3D Utilities provides additional functionality to Unity3D (3.0+) via extensions, utilities, mini-frameworks, etc.VBA Composite Controls Object Model: VBA Composite Controls encapsulate complex event-driven interactions between ActiveX controls and other objects in Microsoft Office. It's uses are limited only by the imagination, from binding controls together for updating, to creating unique user interfaces!World of Warcraft Backit up(wow backit up): a project that helps you backup and restore your settings in wow easilyYamma: Yet Another Money Management Application. Build in .NET 4, SQLCE, LINQ and the Entity Framework.

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• 256 Windows Azure Worker Roles, Windows Kinect and a 90's Text-Based Ray-Tracer

  - by Alan Smith

  For a couple of years I have been demoing a simple render farm hosted in Windows Azure using worker roles and the Azure Storage service. At the start of the presentation I deploy an Azure application that uses 16 worker roles to render a 1,500 frame 3D ray-traced animation. At the end of the presentation, when the animation was complete, I would play the animation delete the Azure deployment. The standing joke with the audience was that it was that it was a “$2 demo”, as the compute charges for running the 16 instances for an hour was $1.92, factor in the bandwidth charges and it’s a couple of dollars. The point of the demo is that it highlights one of the great benefits of cloud computing, you pay for what you use, and if you need massive compute power for a short period of time using Windows Azure can work out very cost effective. The “$2 demo” was great for presenting at user groups and conferences in that it could be deployed to Azure, used to render an animation, and then removed in a one hour session. I have always had the idea of doing something a bit more impressive with the demo, and scaling it from a “$2 demo” to a “$30 demo”. The challenge was to create a visually appealing animation in high definition format and keep the demo time down to one hour.  This article will take a run through how I achieved this. Ray Tracing Ray tracing, a technique for generating high quality photorealistic images, gained popularity in the 90’s with companies like Pixar creating feature length computer animations, and also the emergence of shareware text-based ray tracers that could run on a home PC. In order to render a ray traced image, the ray of light that would pass from the view point must be tracked until it intersects with an object. At the intersection, the color, reflectiveness, transparency, and refractive index of the object are used to calculate if the ray will be reflected or refracted. Each pixel may require thousands of calculations to determine what color it will be in the rendered image. Pin-Board Toys Having very little artistic talent and a basic understanding of maths I decided to focus on an animation that could be modeled fairly easily and would look visually impressive. I’ve always liked the pin-board desktop toys that become popular in the 80’s and when I was working as a 3D animator back in the 90’s I always had the idea of creating a 3D ray-traced animation of a pin-board, but never found the energy to do it. Even if I had a go at it, the render time to produce an animation that would look respectable on a 486 would have been measured in months. PolyRay Back in 1995 I landed my first real job, after spending three years being a beach-ski-climbing-paragliding-bum, and was employed to create 3D ray-traced animations for a CD-ROM that school kids would use to learn physics. I had got into the strange and wonderful world of text-based ray tracing, and was using a shareware ray-tracer called PolyRay. PolyRay takes a text file describing a scene as input and, after a few hours processing on a 486, produced a high quality ray-traced image. The following is an example of a basic PolyRay scene file. background Midnight_Blue   static define matte surface { ambient 0.1 diffuse 0.7 } define matte_white texture { matte { color white } } define matte_black texture { matte { color dark_slate_gray } } define position_cylindrical 3 define lookup_sawtooth 1 define light_wood <0.6, 0.24, 0.1> define median_wood <0.3, 0.12, 0.03> define dark_wood <0.05, 0.01, 0.005>     define wooden texture { noise surface { ambient 0.2  diffuse 0.7  specular white, 0.5 microfacet Reitz 10 position_fn position_cylindrical position_scale 1  lookup_fn lookup_sawtooth octaves 1 turbulence 1 color_map( [0.0, 0.2, light_wood, light_wood] [0.2, 0.3, light_wood, median_wood] [0.3, 0.4, median_wood, light_wood] [0.4, 0.7, light_wood, light_wood] [0.7, 0.8, light_wood, median_wood] [0.8, 0.9, median_wood, light_wood] [0.9, 1.0, light_wood, dark_wood]) } } define glass texture { surface { ambient 0 diffuse 0 specular 0.2 reflection white, 0.1 transmission white, 1, 1.5 }} define shiny surface { ambient 0.1 diffuse 0.6 specular white, 0.6 microfacet Phong 7  } define steely_blue texture { shiny { color black } } define chrome texture { surface { color white ambient 0.0 diffuse 0.2 specular 0.4 microfacet Phong 10 reflection 0.8 } }   viewpoint {     from <4.000, -1.000, 1.000> at <0.000, 0.000, 0.000> up <0, 1, 0> angle 60     resolution 640, 480 aspect 1.6 image_format 0 }       light <-10, 30, 20> light <-10, 30, -20>   object { disc <0, -2, 0>, <0, 1, 0>, 30 wooden }   object { sphere <0.000, 0.000, 0.000>, 1.00 chrome } object { cylinder <0.000, 0.000, 0.000>, <0.000, 0.000, -4.000>, 0.50 chrome }   After setting up the background and defining colors and textures, the viewpoint is specified. The “camera” is located at a point in 3D space, and it looks towards another point. The angle, image resolution, and aspect ratio are specified. Two lights are present in the image at defined coordinates. The three objects in the image are a wooden disc to represent a table top, and a sphere and cylinder that intersect to form a pin that will be used for the pin board toy in the final animation. When the image is rendered, the following image is produced. The pins are modeled with a chrome surface, so they reflect the environment around them. Note that the scale of the pin shaft is not correct, this will be fixed later. Modeling the Pin Board The frame of the pin-board is made up of three boxes, and six cylinders, the front box is modeled using a clear, slightly reflective solid, with the same refractive index of glass. The other shapes are modeled as metal. object { box <-5.5, -1.5, 1>, <5.5, 5.5, 1.2> glass } object { box <-5.5, -1.5, -0.04>, <5.5, 5.5, -0.09> steely_blue } object { box <-5.5, -1.5, -0.52>, <5.5, 5.5, -0.59> steely_blue } object { cylinder <-5.2, -1.2, 1.4>, <-5.2, -1.2, -0.74>, 0.2 steely_blue } object { cylinder <5.2, -1.2, 1.4>, <5.2, -1.2, -0.74>, 0.2 steely_blue } object { cylinder <-5.2, 5.2, 1.4>, <-5.2, 5.2, -0.74>, 0.2 steely_blue } object { cylinder <5.2, 5.2, 1.4>, <5.2, 5.2, -0.74>, 0.2 steely_blue } object { cylinder <0, -1.2, 1.4>, <0, -1.2, -0.74>, 0.2 steely_blue } object { cylinder <0, 5.2, 1.4>, <0, 5.2, -0.74>, 0.2 steely_blue }   In order to create the matrix of pins that make up the pin board I used a basic console application with a few nested loops to create two intersecting matrixes of pins, which models the layout used in the pin boards. The resulting image is shown below. The pin board contains 11,481 pins, with the scene file containing 23,709 lines of code. For the complete animation 2,000 scene files will be created, which is over 47 million lines of code. Each pin in the pin-board will slide out a specific distance when an object is pressed into the back of the board. This is easily modeled by setting the Z coordinate of the pin to a specific value. In order to set all of the pins in the pin-board to the correct position, a bitmap image can be used. The position of the pin can be set based on the color of the pixel at the appropriate position in the image. When the Windows Azure logo is used to set the Z coordinate of the pins, the following image is generated. The challenge now was to make a cool animation. The Azure Logo is fine, but it is static. Using a normal video to animate the pins would not work; the colors in the video would not be the same as the depth of the objects from the camera. In order to simulate the pin board accurately a series of frames from a depth camera could be used. Windows Kinect The Kenect controllers for the X-Box 360 and Windows feature a depth camera. The Kinect SDK for Windows provides a programming interface for Kenect, providing easy access for .NET developers to the Kinect sensors. The Kinect Explorer provided with the Kinect SDK is a great starting point for exploring Kinect from a developers perspective. Both the X-Box 360 Kinect and the Windows Kinect will work with the Kinect SDK, the Windows Kinect is required for commercial applications, but the X-Box Kinect can be used for hobby projects. The Windows Kinect has the advantage of providing a mode to allow depth capture with objects closer to the camera, which makes for a more accurate depth image for setting the pin positions. Creating a Depth Field Animation The depth field animation used to set the positions of the pin in the pin board was created using a modified version of the Kinect Explorer sample application. In order to simulate the pin board accurately, a small section of the depth range from the depth sensor will be used. Any part of the object in front of the depth range will result in a white pixel; anything behind the depth range will be black. Within the depth range the pixels in the image will be set to RGB values from 0,0,0 to 255,255,255. A screen shot of the modified Kinect Explorer application is shown below. The Kinect Explorer sample application was modified to include slider controls that are used to set the depth range that forms the image from the depth stream. This allows the fine tuning of the depth image that is required for simulating the position of the pins in the pin board. The Kinect Explorer was also modified to record a series of images from the depth camera and save them as a sequence JPEG files that will be used to animate the pins in the animation the Start and Stop buttons are used to start and stop the image recording. En example of one of the depth images is shown below. Once a series of 2,000 depth images has been captured, the task of creating the animation can begin. Rendering a Test Frame In order to test the creation of frames and get an approximation of the time required to render each frame a test frame was rendered on-premise using PolyRay. The output of the rendering process is shown below. The test frame contained 23,629 primitive shapes, most of which are the spheres and cylinders that are used for the 11,800 or so pins in the pin board. The 1280x720 image contains 921,600 pixels, but as anti-aliasing was used the number of rays that were calculated was 4,235,777, with 3,478,754,073 object boundaries checked. The test frame of the pin board with the depth field image applied is shown below. The tracing time for the test frame was 4 minutes 27 seconds, which means rendering the2,000 frames in the animation would take over 148 hours, or a little over 6 days. Although this is much faster that an old 486, waiting almost a week to see the results of an animation would make it challenging for animators to create, view, and refine their animations. It would be much better if the animation could be rendered in less than one hour. Windows Azure Worker Roles The cost of creating an on-premise render farm to render animations increases in proportion to the number of servers. The table below shows the cost of servers for creating a render farm, assuming a cost of $500 per server. Number of Servers Cost 1 $500 16 $8,000 256 $128,000   As well as the cost of the servers, there would be additional costs for networking, racks etc. Hosting an environment of 256 servers on-premise would require a server room with cooling, and some pretty hefty power cabling. The Windows Azure compute services provide worker roles, which are ideal for performing processor intensive compute tasks. With the scalability available in Windows Azure a job that takes 256 hours to complete could be perfumed using different numbers of worker roles. The time and cost of using 1, 16 or 256 worker roles is shown below. Number of Worker Roles Render Time Cost 1 256 hours $30.72 16 16 hours $30.72 256 1 hour $30.72   Using worker roles in Windows Azure provides the same cost for the 256 hour job, irrespective of the number of worker roles used. Provided the compute task can be broken down into many small units, and the worker role compute power can be used effectively, it makes sense to scale the application so that the task is completed quickly, making the results available in a timely fashion. The task of rendering 2,000 frames in an animation is one that can easily be broken down into 2,000 individual pieces, which can be performed by a number of worker roles. Creating a Render Farm in Windows Azure The architecture of the render farm is shown in the following diagram. The render farm is a hybrid application with the following components: ·         On-Premise o   Windows Kinect – Used combined with the Kinect Explorer to create a stream of depth images. o   Animation Creator – This application uses the depth images from the Kinect sensor to create scene description files for PolyRay. These files are then uploaded to the jobs blob container, and job messages added to the jobs queue. o   Process Monitor – This application queries the role instance lifecycle table and displays statistics about the render farm environment and render process. o   Image Downloader – This application polls the image queue and downloads the rendered animation files once they are complete. ·         Windows Azure o   Azure Storage – Queues and blobs are used for the scene description files and completed frames. A table is used to store the statistics about the rendering environment.   The architecture of each worker role is shown below.   The worker role is configured to use local storage, which provides file storage on the worker role instance that can be use by the applications to render the image and transform the format of the image. The service definition for the worker role with the local storage configuration highlighted is shown below. <?xml version="1.0" encoding="utf-8"?> <ServiceDefinition name="CloudRay" >   <WorkerRole name="CloudRayWorkerRole" vmsize="Small">     <Imports>     </Imports>     <ConfigurationSettings>       <Setting name="DataConnectionString" />     </ConfigurationSettings>     <LocalResources>       <LocalStorage name="RayFolder" cleanOnRoleRecycle="true" />     </LocalResources>   </WorkerRole> </ServiceDefinition>     The two executable programs, PolyRay.exe and DTA.exe are included in the Azure project, with Copy Always set as the property. PolyRay will take the scene description file and render it to a Truevision TGA file. As the TGA format has not seen much use since the mid 90’s it is converted to a JPG image using Dave's Targa Animator, another shareware application from the 90’s. Each worker roll will use the following process to render the animation frames. 1.       The worker process polls the job queue, if a job is available the scene description file is downloaded from blob storage to local storage. 2.       PolyRay.exe is started in a process with the appropriate command line arguments to render the image as a TGA file. 3.       DTA.exe is started in a process with the appropriate command line arguments convert the TGA file to a JPG file. 4.       The JPG file is uploaded from local storage to the images blob container. 5.       A message is placed on the images queue to indicate a new image is available for download. 6.       The job message is deleted from the job queue. 7.       The role instance lifecycle table is updated with statistics on the number of frames rendered by the worker role instance, and the CPU time used. The code for this is shown below. public override void Run() {     // Set environment variables     string polyRayPath = Path.Combine(Environment.GetEnvironmentVariable("RoleRoot"), PolyRayLocation);     string dtaPath = Path.Combine(Environment.GetEnvironmentVariable("RoleRoot"), DTALocation);       LocalResource rayStorage = RoleEnvironment.GetLocalResource("RayFolder");     string localStorageRootPath = rayStorage.RootPath;       JobQueue jobQueue = new JobQueue("renderjobs");     JobQueue downloadQueue = new JobQueue("renderimagedownloadjobs");     CloudRayBlob sceneBlob = new CloudRayBlob("scenes");     CloudRayBlob imageBlob = new CloudRayBlob("images");     RoleLifecycleDataSource roleLifecycleDataSource = new RoleLifecycleDataSource();       Frames = 0;       while (true)     {         // Get the render job from the queue         CloudQueueMessage jobMsg = jobQueue.Get();           if (jobMsg != null)         {             // Get the file details             string sceneFile = jobMsg.AsString;             string tgaFile = sceneFile.Replace(".pi", ".tga");             string jpgFile = sceneFile.Replace(".pi", ".jpg");               string sceneFilePath = Path.Combine(localStorageRootPath, sceneFile);             string tgaFilePath = Path.Combine(localStorageRootPath, tgaFile);             string jpgFilePath = Path.Combine(localStorageRootPath, jpgFile);               // Copy the scene file to local storage             sceneBlob.DownloadFile(sceneFilePath);               // Run the ray tracer.             string polyrayArguments =                 string.Format("\"{0}\" -o \"{1}\" -a 2", sceneFilePath, tgaFilePath);             Process polyRayProcess = new Process();             polyRayProcess.StartInfo.FileName =                 Path.Combine(Environment.GetEnvironmentVariable("RoleRoot"), polyRayPath);             polyRayProcess.StartInfo.Arguments = polyrayArguments;             polyRayProcess.Start();             polyRayProcess.WaitForExit();               // Convert the image             string dtaArguments =                 string.Format(" {0} /FJ /P{1}", tgaFilePath, Path.GetDirectoryName (jpgFilePath));             Process dtaProcess = new Process();             dtaProcess.StartInfo.FileName =                 Path.Combine(Environment.GetEnvironmentVariable("RoleRoot"), dtaPath);             dtaProcess.StartInfo.Arguments = dtaArguments;             dtaProcess.Start();             dtaProcess.WaitForExit();               // Upload the image to blob storage             imageBlob.UploadFile(jpgFilePath);               // Add a download job.             downloadQueue.Add(jpgFile);               // Delete the render job message             jobQueue.Delete(jobMsg);               Frames++;         }         else         {             Thread.Sleep(1000);         }           // Log the worker role activity.         roleLifecycleDataSource.Alive             ("CloudRayWorker", RoleLifecycleDataSource.RoleLifecycleId, Frames);     } }     Monitoring Worker Role Instance Lifecycle In order to get more accurate statistics about the lifecycle of the worker role instances used to render the animation data was tracked in an Azure storage table. The following class was used to track the worker role lifecycles in Azure storage.   public class RoleLifecycle : TableServiceEntity {     public string ServerName { get; set; }     public string Status { get; set; }     public DateTime StartTime { get; set; }     public DateTime EndTime { get; set; }     public long SecondsRunning { get; set; }     public DateTime LastActiveTime { get; set; }     public int Frames { get; set; }     public string Comment { get; set; }       public RoleLifecycle()     {     }       public RoleLifecycle(string roleName)     {         PartitionKey = roleName;         RowKey = Utils.GetAscendingRowKey();         Status = "Started";         StartTime = DateTime.UtcNow;         LastActiveTime = StartTime;         EndTime = StartTime;         SecondsRunning = 0;         Frames = 0;     } }     A new instance of this class is created and added to the storage table when the role starts. It is then updated each time the worker renders a frame to record the total number of frames rendered and the total processing time. These statistics are used be the monitoring application to determine the effectiveness of use of resources in the render farm. Rendering the Animation The Azure solution was deployed to Windows Azure with the service configuration set to 16 worker role instances. This allows for the application to be tested in the cloud environment, and the performance of the application determined. When I demo the application at conferences and user groups I often start with 16 instances, and then scale up the application to the full 256 instances. The configuration to run 16 instances is shown below. <?xml version="1.0" encoding="utf-8"?> <ServiceConfiguration serviceName="CloudRay" xmlns="http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration" osFamily="1" osVersion="*">   <Role name="CloudRayWorkerRole">     <Instances count="16" />     <ConfigurationSettings>       <Setting name="DataConnectionString"         value="DefaultEndpointsProtocol=https;AccountName=cloudraydata;AccountKey=..." />     </ConfigurationSettings>   </Role> </ServiceConfiguration>     About six minutes after deploying the application the first worker roles become active and start to render the first frames of the animation. The CloudRay Monitor application displays an icon for each worker role instance, with a number indicating the number of frames that the worker role has rendered. The statistics on the left show the number of active worker roles and statistics about the render process. The render time is the time since the first worker role became active; the CPU time is the total amount of processing time used by all worker role instances to render the frames.   Five minutes after the first worker role became active the last of the 16 worker roles activated. By this time the first seven worker roles had each rendered one frame of the animation.   With 16 worker roles u and running it can be seen that one hour and 45 minutes CPU time has been used to render 32 frames with a render time of just under 10 minutes.     At this rate it would take over 10 hours to render the 2,000 frames of the full animation. In order to complete the animation in under an hour more processing power will be required. Scaling the render farm from 16 instances to 256 instances is easy using the new management portal. The slider is set to 256 instances, and the configuration saved. We do not need to re-deploy the application, and the 16 instances that are up and running will not be affected. Alternatively, the configuration file for the Azure service could be modified to specify 256 instances.   <?xml version="1.0" encoding="utf-8"?> <ServiceConfiguration serviceName="CloudRay" xmlns="http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration" osFamily="1" osVersion="*">   <Role name="CloudRayWorkerRole">     <Instances count="256" />     <ConfigurationSettings>       <Setting name="DataConnectionString"         value="DefaultEndpointsProtocol=https;AccountName=cloudraydata;AccountKey=..." />     </ConfigurationSettings>   </Role> </ServiceConfiguration>     Six minutes after the new configuration has been applied 75 new worker roles have activated and are processing their first frames.   Five minutes later the full configuration of 256 worker roles is up and running. We can see that the average rate of frame rendering has increased from 3 to 12 frames per minute, and that over 17 hours of CPU time has been utilized in 23 minutes. In this test the time to provision 140 worker roles was about 11 minutes, which works out at about one every five seconds.   We are now half way through the rendering, with 1,000 frames complete. This has utilized just under three days of CPU time in a little over 35 minutes.   The animation is now complete, with 2,000 frames rendered in a little over 52 minutes. The CPU time used by the 256 worker roles is 6 days, 7 hours and 22 minutes with an average frame rate of 38 frames per minute. The rendering of the last 1,000 frames took 16 minutes 27 seconds, which works out at a rendering rate of 60 frames per minute. The frame counts in the server instances indicate that the use of a queue to distribute the workload has been very effective in distributing the load across the 256 worker role instances. The first 16 instances that were deployed first have rendered between 11 and 13 frames each, whilst the 240 instances that were added when the application was scaled have rendered between 6 and 9 frames each.   Completed Animation I’ve uploaded the completed animation to YouTube, a low resolution preview is shown below. Pin Board Animation Created using Windows Kinect and 256 Windows Azure Worker Roles   The animation can be viewed in 1280x720 resolution at the following link: http://www.youtube.com/watch?v=n5jy6bvSxWc Effective Use of Resources According to the CloudRay monitor statistics the animation took 6 days, 7 hours and 22 minutes CPU to render, this works out at 152 hours of compute time, rounded up to the nearest hour. As the usage for the worker role instances are billed for the full hour, it may have been possible to render the animation using fewer than 256 worker roles. When deciding the optimal usage of resources, the time required to provision and start the worker roles must also be considered. In the demo I started with 16 worker roles, and then scaled the application to 256 worker roles. It would have been more optimal to start the application with maybe 200 worker roles, and utilized the full hour that I was being billed for. This would, however, have prevented showing the ease of scalability of the application. The new management portal displays the CPU usage across the worker roles in the deployment. The average CPU usage across all instances is 93.27%, with over 99% used when all the instances are up and running. This shows that the worker role resources are being used very effectively. Grid Computing Scenarios Although I am using this scenario for a hobby project, there are many scenarios where a large amount of compute power is required for a short period of time. Windows Azure provides a great platform for developing these types of grid computing applications, and can work out very cost effective. ·         Windows Azure can provide massive compute power, on demand, in a matter of minutes. ·         The use of queues to manage the load balancing of jobs between role instances is a simple and effective solution. ·         Using a cloud-computing platform like Windows Azure allows proof-of-concept scenarios to be tested and evaluated on a very low budget. ·         No charges for inbound data transfer makes the uploading of large data sets to Windows Azure Storage services cost effective. (Transaction charges still apply.) Tips for using Windows Azure for Grid Computing Scenarios I found the implementation of a render farm using Windows Azure a fairly simple scenario to implement. I was impressed by ease of scalability that Azure provides, and by the short time that the application took to scale from 16 to 256 worker role instances. In this case it was around 13 minutes, in other tests it took between 10 and 20 minutes. The following tips may be useful when implementing a grid computing project in Windows Azure. ·         Using an Azure Storage queue to load-balance the units of work across multiple worker roles is simple and very effective. The design I have used in this scenario could easily scale to many thousands of worker role instances. ·         Windows Azure accounts are typically limited to 20 cores. If you need to use more than this, a call to support and a credit card check will be required. ·         Be aware of how the billing model works. You will be charged for worker role instances for the full clock our in which the instance is deployed. Schedule the workload to start just after the clock hour has started. ·         Monitor the utilization of the resources you are provisioning, ensure that you are not paying for worker roles that are idle. ·         If you are deploying third party applications to worker roles, you may well run into licensing issues. Purchasing software licenses on a per-processor basis when using hundreds of processors for a short time period would not be cost effective. ·         Third party software may also require installation onto the worker roles, which can be accomplished using start-up tasks. Bear in mind that adding a startup task and possible re-boot will add to the time required for the worker role instance to start and activate. An alternative may be to use a prepared VM and use VM roles. ·         Consider using the Windows Azure Autoscaling Application Block (WASABi) to autoscale the worker roles in your application. When using a large number of worker roles, the utilization must be carefully monitored, if the scaling algorithms are not optimal it could get very expensive!

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• Building applications with WCF - Intro

  - by skjagini

  I am going to write series of articles using Windows Communication Framework (WCF) to develop client and server applications and this is the first part of that series. What is WCF As Juwal puts in his Programming WCF book, WCF provides an SDK for developing and deploying services on Windows, provides runtime environment to expose CLR types as services and consume services as CLR types. Building services with WCF is incredibly easy and it’s implementation provides a set of industry standards and off the shelf plumbing including service hosting, instance management, reliability, transaction management, security etc such that it greatly increases productivity Scenario: Lets consider a typical bank customer trying to create an account, deposit amount and transfer funds between accounts, i.e. checking and savings. To make it interesting, we are going to divide the functionality into multiple services and each of them working with database directly. We will run test cases with and without transactional support across services. In this post we will build contracts, services, data access layer, unit tests to verify end to end communication etc, nothing big stuff here and we dig into other features of the WCF in subsequent posts with incremental changes. In any distributed architecture we have two pieces i.e. services and clients. Services as the name implies provide functionality to execute various pieces of business logic on the server, and clients providing interaction to the end user. Services can be built with Web Services or with WCF. Service built on WCF have the advantage of binding independent, i.e. can run against TCP and HTTP protocol without any significant changes to the code. Solution Services Profile: For creating a new bank customer, getting details about existing customer ProfileContract ProfileService Checking Account: To get checking account balance, deposit or withdraw amount CheckingAccountContract CheckingAccountService Savings Account: To get savings account balance, deposit or withdraw amount SavingsAccountContract SavingsAccountService ServiceHost: To host services, i.e. running the services at particular address, binding and contract where client can connect to Client: Helps end user to use services like creating account and amount transfer between the accounts BankDAL: Data access layer to work with database     BankDAL It’s no brainer not to use an ORM as many matured products are available currently in market including Linq2Sql, Entity Framework (EF), LLblGenPro etc. For this exercise I am going to use Entity Framework 4.0, CTP 5 with code first approach. There are two approaches when working with data, data driven and code driven. In data driven we start by designing tables and their constrains in database and generate entities in code while in code driven (code first) approach entities are defined in code and the metadata generated from the entities is used by the EF to create tables and table constrains. In previous versions the entity classes had  to derive from EF specific base classes. In EF 4 it  is not required to derive from any EF classes, the entities are not only persistence ignorant but also enable full test driven development using mock frameworks.  Application consists of 3 entities, Customer entity which contains Customer details; CheckingAccount and SavingsAccount to hold the respective account balance. We could have introduced an Account base class for CheckingAccount and SavingsAccount which is certainly possible with EF mappings but to keep it simple we are just going to follow 1 –1 mapping between entity and table mappings. Lets start out by defining a class called Customer which will be mapped to Customer table, observe that the class is simply a plain old clr object (POCO) and has no reference to EF at all. using System;   namespace BankDAL.Model { public class Customer { public int Id { get; set; } public string FullName { get; set; } public string Address { get; set; } public DateTime DateOfBirth { get; set; } } }   In order to inform EF about the Customer entity we have to define a database context with properties of type DbSet<> for every POCO which needs to be mapped to a table in database. EF uses convention over configuration to generate the metadata resulting in much less configuration. using System.Data.Entity;   namespace BankDAL.Model { public class BankDbContext: DbContext { public DbSet<Customer> Customers { get; set; } } }   Entity constrains can be defined through attributes on Customer class or using fluent syntax (no need to muscle with xml files), CustomerConfiguration class. By defining constrains in a separate class we can maintain clean POCOs without corrupting entity classes with database specific information.   using System; using System.Data.Entity.ModelConfiguration;   namespace BankDAL.Model { public class CustomerConfiguration: EntityTypeConfiguration<Customer> { public CustomerConfiguration() { Initialize(); }   private void Initialize() { //Setting the Primary Key this.HasKey(e => e.Id);   //Setting required fields this.HasRequired(e => e.FullName); this.HasRequired(e => e.Address); //Todo: Can't create required constraint as DateOfBirth is not reference type, research it //this.HasRequired(e => e.DateOfBirth); } } }   Any queries executed against Customers property in BankDbContext are executed against Cusomers table. By convention EF looks for connection string with key of BankDbContext when working with the context.   We are going to define a helper class to work with Customer entity with methods for querying, adding new entity etc and these are known as repository classes, i.e., CustomerRepository   using System; using System.Data.Entity; using System.Linq; using BankDAL.Model;   namespace BankDAL.Repositories { public class CustomerRepository { private readonly IDbSet<Customer> _customers;   public CustomerRepository(BankDbContext bankDbContext) { if (bankDbContext == null) throw new ArgumentNullException(); _customers = bankDbContext.Customers; }   public IQueryable<Customer> Query() { return _customers; }   public void Add(Customer customer) { _customers.Add(customer); } } }   From the above code it is observable that the Query methods returns customers as IQueryable i.e. customers are retrieved only when actually used i.e. iterated. Returning as IQueryable also allows to execute filtering and joining statements from business logic using lamba expressions without cluttering the data access layer with tens of methods.   Our CheckingAccountRepository and SavingsAccountRepository look very similar to each other using System; using System.Data.Entity; using System.Linq; using BankDAL.Model;   namespace BankDAL.Repositories { public class CheckingAccountRepository { private readonly IDbSet<CheckingAccount> _checkingAccounts;   public CheckingAccountRepository(BankDbContext bankDbContext) { if (bankDbContext == null) throw new ArgumentNullException(); _checkingAccounts = bankDbContext.CheckingAccounts; }   public IQueryable<CheckingAccount> Query() { return _checkingAccounts; }   public void Add(CheckingAccount account) { _checkingAccounts.Add(account); }   public IQueryable<CheckingAccount> GetAccount(int customerId) { return (from act in _checkingAccounts where act.CustomerId == customerId select act); }   } } The repository classes look very similar to each other for Query and Add methods, with the help of C# generics and implementing repository pattern (Martin Fowler) we can reduce the repeated code. Jarod from ElegantCode has posted an article on how to use repository pattern with EF which we will implement in the subsequent articles along with WCF Unity life time managers by Drew Contracts It is very easy to follow contract first approach with WCF, define the interface and append ServiceContract, OperationContract attributes. IProfile contract exposes functionality for creating customer and getting customer details.   using System; using System.ServiceModel; using BankDAL.Model;   namespace ProfileContract { [ServiceContract] public interface IProfile { [OperationContract] Customer CreateCustomer(string customerName, string address, DateTime dateOfBirth);   [OperationContract] Customer GetCustomer(int id);   } }   ICheckingAccount contract exposes functionality for working with checking account, i.e., getting balance, deposit and withdraw of amount. ISavingsAccount contract looks the same as checking account.   using System.ServiceModel;   namespace CheckingAccountContract { [ServiceContract] public interface ICheckingAccount { [OperationContract] decimal? GetCheckingAccountBalance(int customerId);   [OperationContract] void DepositAmount(int customerId,decimal amount);   [OperationContract] void WithdrawAmount(int customerId, decimal amount);   } }   Services   Having covered the data access layer and contracts so far and here comes the core of the business logic, i.e. services.   .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } ProfileService implements the IProfile contract for creating customer and getting customer detail using CustomerRepository. using System; using System.Linq; using System.ServiceModel; using BankDAL; using BankDAL.Model; using BankDAL.Repositories; using ProfileContract;   namespace ProfileService { [ServiceBehavior(IncludeExceptionDetailInFaults = true)] public class Profile: IProfile { public Customer CreateAccount( string customerName, string address, DateTime dateOfBirth) { Customer cust = new Customer { FullName = customerName, Address = address, DateOfBirth = dateOfBirth };   using (var bankDbContext = new BankDbContext()) { new CustomerRepository(bankDbContext).Add(cust); bankDbContext.SaveChanges(); } return cust; }   public Customer CreateCustomer(string customerName, string address, DateTime dateOfBirth) { return CreateAccount(customerName, address, dateOfBirth); } public Customer GetCustomer(int id) { return new CustomerRepository(new BankDbContext()).Query() .Where(i => i.Id == id).FirstOrDefault(); }   } } From the above code you shall observe that we are calling bankDBContext’s SaveChanges method and there is no save method specific to customer entity because EF manages all the changes centralized at the context level and all the pending changes so far are submitted in a batch and it is represented as Unit of Work. Similarly Checking service implements ICheckingAccount contract using CheckingAccountRepository, notice that we are throwing overdraft exception if the balance falls by zero. WCF has it’s own way of raising exceptions using fault contracts which will be explained in the subsequent articles. SavingsAccountService is similar to CheckingAccountService. using System; using System.Linq; using System.ServiceModel; using BankDAL.Model; using BankDAL.Repositories; using CheckingAccountContract;   namespace CheckingAccountService { [ServiceBehavior(IncludeExceptionDetailInFaults = true)] public class Checking:ICheckingAccount { public decimal? GetCheckingAccountBalance(int customerId) { using (var bankDbContext = new BankDbContext()) { CheckingAccount account = (new CheckingAccountRepository(bankDbContext) .GetAccount(customerId)).FirstOrDefault();   if (account != null) return account.Balance;   return null; } }   public void DepositAmount(int customerId, decimal amount) { using(var bankDbContext = new BankDbContext()) { var checkingAccountRepository = new CheckingAccountRepository(bankDbContext); CheckingAccount account = (checkingAccountRepository.GetAccount(customerId)) .FirstOrDefault();   if (account == null) { account = new CheckingAccount() { CustomerId = customerId }; checkingAccountRepository.Add(account); }   account.Balance = account.Balance + amount; if (account.Balance < 0) throw new ApplicationException("Overdraft not accepted");   bankDbContext.SaveChanges(); } } public void WithdrawAmount(int customerId, decimal amount) { DepositAmount(customerId, -1*amount); } } }   BankServiceHost The host acts as a glue binding contracts with it’s services, exposing the endpoints. The services can be exposed either through the code or configuration file, configuration file is preferred as it allows run time changes to service behavior even after deployment. We have 3 services and for each of the service you need to define name (the class that implements the service with fully qualified namespace) and endpoint known as ABC, i.e. address, binding and contract. We are using netTcpBinding and have defined the base address with for each of the contracts .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } <system.serviceModel> <services> <service name="ProfileService.Profile"> <endpoint binding="netTcpBinding" contract="ProfileContract.IProfile"/> <host> <baseAddresses> <add baseAddress="net.tcp://localhost:1000/Profile"/> </baseAddresses> </host> </service> <service name="CheckingAccountService.Checking"> <endpoint binding="netTcpBinding" contract="CheckingAccountContract.ICheckingAccount"/> <host> <baseAddresses> <add baseAddress="net.tcp://localhost:1000/Checking"/> </baseAddresses> </host> </service> <service name="SavingsAccountService.Savings"> <endpoint binding="netTcpBinding" contract="SavingsAccountContract.ISavingsAccount"/> <host> <baseAddresses> <add baseAddress="net.tcp://localhost:1000/Savings"/> </baseAddresses> </host> </service> </services> </system.serviceModel> Have to open the services by creating service host which will handle the incoming requests from clients.   using System;   namespace ServiceHost { class Program { static void Main(string[] args) { CreateHosts(); Console.ReadLine(); }   private static void CreateHosts() { CreateHost(typeof(ProfileService.Profile),"Profile Service"); CreateHost(typeof(SavingsAccountService.Savings), "Savings Account Service"); CreateHost(typeof(CheckingAccountService.Checking), "Checking Account Service"); }   private static void CreateHost(Type type, string hostDescription) { System.ServiceModel.ServiceHost host = new System.ServiceModel.ServiceHost(type); host.Open();   if (host.ChannelDispatchers != null && host.ChannelDispatchers.Count != 0 && host.ChannelDispatchers[0].Listener != null) Console.WriteLine("Started: " + host.ChannelDispatchers[0].Listener.Uri); else Console.WriteLine("Failed to start:" + hostDescription); } } } BankClient    The client has no knowledge about service business logic other than the functionality it exposes through the contract, end points and a proxy to work against. The endpoint data and server proxy can be generated by right clicking on the project reference and choosing ‘Add Service Reference’ and entering the service end point address. Or if you have access to source, you can manually reference contract dlls and update clients configuration file to point to the service end point if the server and client happens to be being built using .Net framework. One of the pros with the manual approach is you don’t have to work against messy code generated files.   <system.serviceModel> <client> <endpoint name="tcpProfile" address="net.tcp://localhost:1000/Profile" binding="netTcpBinding" contract="ProfileContract.IProfile"/> <endpoint name="tcpCheckingAccount" address="net.tcp://localhost:1000/Checking" binding="netTcpBinding" contract="CheckingAccountContract.ICheckingAccount"/> <endpoint name="tcpSavingsAccount" address="net.tcp://localhost:1000/Savings" binding="netTcpBinding" contract="SavingsAccountContract.ISavingsAccount"/>   </client> </system.serviceModel> The client uses a façade to connect to the services   using System.ServiceModel; using CheckingAccountContract; using ProfileContract; using SavingsAccountContract;   namespace Client { public class ProxyFacade { public static IProfile ProfileProxy() { return (new ChannelFactory<IProfile>("tcpProfile")).CreateChannel(); }   public static ICheckingAccount CheckingAccountProxy() { return (new ChannelFactory<ICheckingAccount>("tcpCheckingAccount")) .CreateChannel(); }   public static ISavingsAccount SavingsAccountProxy() { return (new ChannelFactory<ISavingsAccount>("tcpSavingsAccount")) .CreateChannel(); }   } }   With that in place, lets get our unit tests going   using System; using System.Diagnostics; using BankDAL.Model; using NUnit.Framework; using ProfileContract;   namespace Client { [TestFixture] public class Tests { private void TransferFundsFromSavingsToCheckingAccount(int customerId, decimal amount) { ProxyFacade.CheckingAccountProxy().DepositAmount(customerId, amount); ProxyFacade.SavingsAccountProxy().WithdrawAmount(customerId, amount); }   private void TransferFundsFromCheckingToSavingsAccount(int customerId, decimal amount) { ProxyFacade.SavingsAccountProxy().DepositAmount(customerId, amount); ProxyFacade.CheckingAccountProxy().WithdrawAmount(customerId, amount); }     [Test] public void CreateAndGetProfileTest() { IProfile profile = ProxyFacade.ProfileProxy(); const string customerName = "Tom"; int customerId = profile.CreateCustomer(customerName, "NJ", new DateTime(1982, 1, 1)).Id; Customer customer = profile.GetCustomer(customerId); Assert.AreEqual(customerName,customer.FullName); }   [Test] public void DepositWithDrawAndTransferAmountTest() { IProfile profile = ProxyFacade.ProfileProxy(); string customerName = "Smith" + DateTime.Now.ToString("HH:mm:ss"); var customer = profile.CreateCustomer(customerName, "NJ", new DateTime(1982, 1, 1)); // Deposit to Savings ProxyFacade.SavingsAccountProxy().DepositAmount(customer.Id, 100); ProxyFacade.SavingsAccountProxy().DepositAmount(customer.Id, 25); Assert.AreEqual(125, ProxyFacade.SavingsAccountProxy().GetSavingsAccountBalance(customer.Id)); // Withdraw ProxyFacade.SavingsAccountProxy().WithdrawAmount(customer.Id, 30); Assert.AreEqual(95, ProxyFacade.SavingsAccountProxy().GetSavingsAccountBalance(customer.Id));   // Deposit to Checking ProxyFacade.CheckingAccountProxy().DepositAmount(customer.Id, 60); ProxyFacade.CheckingAccountProxy().DepositAmount(customer.Id, 40); Assert.AreEqual(100, ProxyFacade.CheckingAccountProxy().GetCheckingAccountBalance(customer.Id)); // Withdraw ProxyFacade.CheckingAccountProxy().WithdrawAmount(customer.Id, 30); Assert.AreEqual(70, ProxyFacade.CheckingAccountProxy().GetCheckingAccountBalance(customer.Id));   // Transfer from Savings to Checking TransferFundsFromSavingsToCheckingAccount(customer.Id,10); Assert.AreEqual(85, ProxyFacade.SavingsAccountProxy().GetSavingsAccountBalance(customer.Id)); Assert.AreEqual(80, ProxyFacade.CheckingAccountProxy().GetCheckingAccountBalance(customer.Id));   // Transfer from Checking to Savings TransferFundsFromCheckingToSavingsAccount(customer.Id, 50); Assert.AreEqual(135, ProxyFacade.SavingsAccountProxy().GetSavingsAccountBalance(customer.Id)); Assert.AreEqual(30, ProxyFacade.CheckingAccountProxy().GetCheckingAccountBalance(customer.Id)); }   [Test] public void FundTransfersWithOverDraftTest() { IProfile profile = ProxyFacade.ProfileProxy(); string customerName = "Angelina" + DateTime.Now.ToString("HH:mm:ss");   var customerId = profile.CreateCustomer(customerName, "NJ", new DateTime(1972, 1, 1)).Id;   ProxyFacade.SavingsAccountProxy().DepositAmount(customerId, 100); TransferFundsFromSavingsToCheckingAccount(customerId,80); Assert.AreEqual(20, ProxyFacade.SavingsAccountProxy().GetSavingsAccountBalance(customerId)); Assert.AreEqual(80, ProxyFacade.CheckingAccountProxy().GetCheckingAccountBalance(customerId));   try { TransferFundsFromSavingsToCheckingAccount(customerId,30); } catch (Exception e) { Debug.WriteLine(e.Message); }   Assert.AreEqual(110, ProxyFacade.CheckingAccountProxy().GetCheckingAccountBalance(customerId)); Assert.AreEqual(20, ProxyFacade.SavingsAccountProxy().GetSavingsAccountBalance(customerId)); } } }   We are creating a new instance of the channel for every operation, we will look into instance management and how creating a new instance of channel affects it in subsequent articles. The first two test cases deals with creation of Customer, deposit and withdraw of month between accounts. The last case, FundTransferWithOverDraftTest() is interesting. Customer starts with depositing $100 in SavingsAccount followed by transfer of $80 in to checking account resulting in $20 in savings account.  Customer then initiates $30 transfer from Savings to Checking resulting in overdraft exception on Savings with $30 being deposited to Checking. As we are not running both the requests in transactions the customer ends up with more amount than what he started with $100. In subsequent posts we will look into transactions handling.  Make sure the ServiceHost project is set as start up project and start the solution. Run the test cases either from NUnit client or TestDriven.Net/Resharper which ever is your favorite tool. Make sure you have updated the data base connection string in the ServiceHost config file to point to your local database

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• CodePlex Daily Summary for Wednesday, November 02, 2011

  CodePlex Daily Summary for Wednesday, November 02, 2011Popular ReleasesWYGIWYS Driver: 1.1.2.0 release: Win32, x86, kernel mode driver.Reset IPv6: 1.0.0.0: First release. Only works for Spanish and English operating system editions.BExplorer (Better Explorer): Better Explorer 2.0.0.631 Alpha: Changelog: Added: Some new functions in ribbon Added: Possibility to choose displayed columns Added: Basic Search Fixed: Some bugs after navigation Fixed: Attempt to fix slow navigation and slow start Known issues: - BreadcrumbBar fails on some situations - Basic search not work quite well in some situations Please if anyone find bugs be kind and report them at the Issue Tracker! Thanks!DotNetNuke® Community Edition: 05.06.04: Major Highlights Fixed issue with upgrades on systems that had upgraded the Telerik library to 6.0.0 Fixed issue with Razor Host upgrade to 5.6.3 The logic for module administration checks contains incorrect logic in 1 place, opening the possibility of a user with edit permissions gaining access to functionality they should not have through a particularly crafted url Security FixesBrowsers support the ability to remember common strings such as usernames/addresses etc. Code was adde...Terminals: Version 2.0 - Beta 2 Release: The team has finally put the nail into the official release date for version 2.0. As bugs are winding down on the 2.0 Roadmap we decided to push out another build - the first 2.0 Beta build. Please take time to use and abuse this release. We left logging in place, and this is a debug build so be sure to submit your logs on each bug reported, and please do report all bugs! Check the source code page on the site, this beta includes all commits since (and including) the 90428 check-in back i...iTuner - The iTunes Companion: iTuner 1.4.4322: Added German (unverified, apologies if incorrect) Properly source invariant resources with correct resIDs Replaced obsolete lyric providers with working providers Fix Pseudolater to correctly morph every third char Fix null reference in CatalogBaseTrack Folder Changes: Track Folder Changes 1.0: Track Folder Changes 1.0 (binary)Windows Workflow Foundation on Codeplex: Microsoft.Activities v1.8.8: Microsoft.Activities Overview How do I install Microsoft.Activities? Updates in this release9318Technical Analysis Engine for .NET: Technical Analysis Engine 1.25: What's new in the 1.25 release (2011-11-01): - Added Williams %R indicator - Added Moving Average Envelopes indicatorBF3Rcon.NET: BF3Rcon 3.0: This release is targeted for RCON documentation based on R3. 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By default, you end up with this directory structure: C:\Program Files\ViperWorks\BoxWorld C:\Program Files\ViperWorks\BoxWorld\Data C:\Program Files\ViperWorks\BoxWorld\Interface C:\Program Files\ViperWorks\BoxWorld\Source In the root you have the compiled EXE files, one for the main release, one for the LITE release ...VidCoder: 1.2.1: Fixed a couple regressions: video encoder was blank in queue and crashes with the High Profile preset when opening the Settings window. Fixed problem with auto-update introduced in 1.2.0. If you have 1.2.0 you will need to update manually to get this.Koober: Koober - The Ebook Creator 0.2: The official release of Koober as Open source. 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NetworkMonitor_Parsers.msi is the base parser package which defines parsers for commonly used public protocols and protocols for Microsoft Windows. In this release, NetowrkMonitor_Parsers.msi continues to improve quality and fix bugs. It has included the fo...Media Companion: MC 3.420b Weekly: Ensure .NET 4.0 Full Framework is installed. (Available from http://www.microsoft.com/download/en/details.aspx?id=17718) Ensure the NFO ID fix is applied when transitioning from versions prior to 3.416b. (Details here) Movies Fixed: Fanart and poster scraping issues TV Shows (Re)Added: Rebuild single show Fixed: Issue when shows are moved from original location Ability to handle " for actor nicknames Crash when episode name contains "<" (does not scrape yet) Clears fanart when switch...patterns & practices - Unity: Unity 3.0 for .NET4.5 Preview: The Unity 3.0.1026.0 Preview enables Unity to work on .NET 4.5 with both the WinRT and desktop profiles. 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It allow to share code with server.Northern Lights WP7 Toolkit: Northern Lights WP7 Toolkit contains some common tools for WP7 Developers.SccmBoundaryHealthTool: .NET application that will search the AD forest for SCCM boundary configurations and report the following: * Overlapping boundaries, including those inter-boundary type, e.g. IP subnet overlaps with AD site. * Unassigned AD sites * Orphaned AD sites in SCCMSeven: Seven is a set of tools for programs development using the Oberon 07 language. SOAP Test Application (with EWS Tools): Application that allows testing of SOAP implementations, in particular Exchange Web Services.SocialCastDotNet: C# library for accessing the SocialCast APISosyal: Sosyal as.sqlce_perfDemo: just a bit of code to demonstrate sqlce insert performance on the desktop. I'm using sqlce on the desktop to persist data as its the fastest thing I can find. Insert perfromance seems to top out at around 65,000records/sec on my laptop but it also seems to limited at this point by my hard drive speeds. The sample code should be able to accept a dataTable, dataReader or dataset and persit to a sqlce database. Also in the code is a small wrapper on the sqlce connectionstring (localconne...SqlMon for OracleClient: This is a project to doing a tool just like Quest SQL Monitor that capture sql sentence in client side.So it's so cool that juect join in and user it. It's developed in C# and Visual Studio 2010 and bases on the EasyHook that is a powerfull .NET hook library.It injects in oci.dll and hook the "OCIStmtPrepare" function which excute before sql excuting,through the parameter "stms" we can get the sqltext and display itStackOverflow Offline Reader using a pdf reader: Using one or more keywords and number of questions to download, the app creates and displays a single pdf file of the questions and answers pertaining to the keyword(s). This enables the user to read questions in an offline manner or to read in a top/down fashion. std::streambuf wrapper for COM IStream: This provides a subclass of std::streambuf that wraps a COM IStream, so you can use an IStream with any C++ code that uses iostreams or the STL algorithms with a streambuf_iterator. It does no internal buffering whatsoever (I'd be happy to change this if someone needs it).step out ring signatures .net: Simple program to demonstrate how srs works in real world of .net.System Center Service Manager 2010 SP1 WCF and Web Service: Simple WCF Service and Web Service for SCSM 2010 SP1.System32 - SDK de componentes y acceso a datos para .NET: System32 - SDK de componentes y acceso a datos para .NET Taha Mail: A Java Web Based MailTest TDS: Test TFS - 1Track Folder Changes: Displays in real time a tree with the list of created/deleted/changed files in a specific directory and its subdirectoriesumbTrafficCentral: A plugin for Umbraco that adds robust and scalable handling of redirects, storing the data in the media library. WebDAV Test Application: Application to test WebDAV functionality.XnaXaml: XnaXaml allows you to add a XAML file to your Content Pipeline in XNA and edit straight from Visual Studio. It then takes the XAML file and parses through it to create mock objects that can be used to render controls to the screen in XNA. These mock objects can also be used to pass data to any GUI system you choose.???-?????????? ?? ????????????? ????????? ??????????? ??????? ???: Under construction

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• MERGE Bug with Filtered Indexes

  - by Paul White

  A MERGE statement can fail, and incorrectly report a unique key violation when: The target table uses a unique filtered index; and No key column of the filtered index is updated; and A column from the filtering condition is updated; and Transient key violations are possible Example Tables Say we have two tables, one that is the target of a MERGE statement, and another that contains updates to be applied to the target.  The target table contains three columns, an integer primary key, a single character alternate key, and a status code column.  A filtered unique index exists on the alternate key, but is only enforced where the status code is ‘a’: CREATE TABLE #Target ( pk integer NOT NULL, ak character(1) NOT NULL, status_code character(1) NOT NULL,   PRIMARY KEY (pk) );   CREATE UNIQUE INDEX uq1 ON #Target (ak) INCLUDE (status_code) WHERE status_code = 'a'; The changes table contains just an integer primary key (to identify the target row to change) and the new status code: CREATE TABLE #Changes ( pk integer NOT NULL, status_code character(1) NOT NULL,   PRIMARY KEY (pk) ); Sample Data The sample data for the example is: INSERT #Target (pk, ak, status_code) VALUES (1, 'A', 'a'), (2, 'B', 'a'), (3, 'C', 'a'), (4, 'A', 'd');   INSERT #Changes (pk, status_code) VALUES (1, 'd'), (4, 'a');          Target                     Changes +-----------------------+    +------------------+ ¦ pk ¦ ak ¦ status_code ¦    ¦ pk ¦ status_code ¦ ¦----+----+-------------¦    ¦----+-------------¦ ¦  1 ¦ A  ¦ a           ¦    ¦  1 ¦ d           ¦ ¦  2 ¦ B  ¦ a           ¦    ¦  4 ¦ a           ¦ ¦  3 ¦ C  ¦ a           ¦    +------------------+ ¦  4 ¦ A  ¦ d           ¦ +-----------------------+ The target table’s alternate key (ak) column is unique, for rows where status_code = ‘a’.  Applying the changes to the target will change row 1 from status ‘a’ to status ‘d’, and row 4 from status ‘d’ to status ‘a’.  The result of applying all the changes will still satisfy the filtered unique index, because the ‘A’ in row 1 will be deleted from the index and the ‘A’ in row 4 will be added. Merge Test One Let’s now execute a MERGE statement to apply the changes: MERGE #Target AS t USING #Changes AS c ON c.pk = t.pk WHEN MATCHED AND c.status_code <> t.status_code THEN UPDATE SET status_code = c.status_code; The MERGE changes the two target rows as expected.  The updated target table now contains: +-----------------------+ ¦ pk ¦ ak ¦ status_code ¦ ¦----+----+-------------¦ ¦  1 ¦ A  ¦ d           ¦ <—changed from ‘a’ ¦  2 ¦ B  ¦ a           ¦ ¦  3 ¦ C  ¦ a           ¦ ¦  4 ¦ A  ¦ a           ¦ <—changed from ‘d’ +-----------------------+ Merge Test Two Now let’s repopulate the changes table to reverse the updates we just performed: TRUNCATE TABLE #Changes;   INSERT #Changes (pk, status_code) VALUES (1, 'a'), (4, 'd'); This will change row 1 back to status ‘a’ and row 4 back to status ‘d’.  As a reminder, the current state of the tables is:          Target                        Changes +-----------------------+    +------------------+ ¦ pk ¦ ak ¦ status_code ¦    ¦ pk ¦ status_code ¦ ¦----+----+-------------¦    ¦----+-------------¦ ¦  1 ¦ A  ¦ d           ¦    ¦  1 ¦ a           ¦ ¦  2 ¦ B  ¦ a           ¦    ¦  4 ¦ d           ¦ ¦  3 ¦ C  ¦ a           ¦    +------------------+ ¦  4 ¦ A  ¦ a           ¦ +-----------------------+ We execute the same MERGE statement: MERGE #Target AS t USING #Changes AS c ON c.pk = t.pk WHEN MATCHED AND c.status_code <> t.status_code THEN UPDATE SET status_code = c.status_code; However this time we receive the following message: Msg 2601, Level 14, State 1, Line 1 Cannot insert duplicate key row in object 'dbo.#Target' with unique index 'uq1'. The duplicate key value is (A). The statement has been terminated. Applying the changes using UPDATE Let’s now rewrite the MERGE to use UPDATE instead: UPDATE t SET status_code = c.status_code FROM #Target AS t JOIN #Changes AS c ON t.pk = c.pk WHERE c.status_code <> t.status_code; This query succeeds where the MERGE failed.  The two rows are updated as expected: +-----------------------+ ¦ pk ¦ ak ¦ status_code ¦ ¦----+----+-------------¦ ¦  1 ¦ A  ¦ a           ¦ <—changed back to ‘a’ ¦  2 ¦ B  ¦ a           ¦ ¦  3 ¦ C  ¦ a           ¦ ¦  4 ¦ A  ¦ d           ¦ <—changed back to ‘d’ +-----------------------+ What went wrong with the MERGE? In this test, the MERGE query execution happens to apply the changes in the order of the ‘pk’ column. In test one, this was not a problem: row 1 is removed from the unique filtered index by changing status_code from ‘a’ to ‘d’ before row 4 is added.  At no point does the table contain two rows where ak = ‘A’ and status_code = ‘a’. In test two, however, the first change was to change row 1 from status ‘d’ to status ‘a’.  This change means there would be two rows in the filtered unique index where ak = ‘A’ (both row 1 and row 4 meet the index filtering criteria ‘status_code = a’). The storage engine does not allow the query processor to violate a unique key (unless IGNORE_DUP_KEY is ON, but that is a different story, and doesn’t apply to MERGE in any case).  This strict rule applies regardless of the fact that if all changes were applied, there would be no unique key violation (row 4 would eventually be changed from ‘a’ to ‘d’, removing it from the filtered unique index, and resolving the key violation). Why it went wrong The query optimizer usually detects when this sort of temporary uniqueness violation could occur, and builds a plan that avoids the issue.  I wrote about this a couple of years ago in my post Beware Sneaky Reads with Unique Indexes (you can read more about the details on pages 495-497 of Microsoft SQL Server 2008 Internals or in Craig Freedman’s blog post on maintaining unique indexes).  To summarize though, the optimizer introduces Split, Filter, Sort, and Collapse operators into the query plan to: Split each row update into delete followed by an inserts Filter out rows that would not change the index (due to the filter on the index, or a non-updating update) Sort the resulting stream by index key, with deletes before inserts Collapse delete/insert pairs on the same index key back into an update The effect of all this is that only net changes are applied to an index (as one or more insert, update, and/or delete operations).  In this case, the net effect is a single update of the filtered unique index: changing the row for ak = ‘A’ from pk = 4 to pk = 1.  In case that is less than 100% clear, let’s look at the operation in test two again:          Target                     Changes                   Result +-----------------------+    +------------------+    +-----------------------+ ¦ pk ¦ ak ¦ status_code ¦    ¦ pk ¦ status_code ¦    ¦ pk ¦ ak ¦ status_code ¦ ¦----+----+-------------¦    ¦----+-------------¦    ¦----+----+-------------¦ ¦  1 ¦ A  ¦ d           ¦    ¦  1 ¦ d           ¦    ¦  1 ¦ A  ¦ a           ¦ ¦  2 ¦ B  ¦ a           ¦    ¦  4 ¦ a           ¦    ¦  2 ¦ B  ¦ a           ¦ ¦  3 ¦ C  ¦ a           ¦    +------------------+    ¦  3 ¦ C  ¦ a           ¦ ¦  4 ¦ A  ¦ a           ¦                            ¦  4 ¦ A  ¦ d           ¦ +-----------------------+                            +-----------------------+ From the filtered index’s point of view (filtered for status_code = ‘a’ and shown in nonclustered index key order) the overall effect of the query is:   Before           After +---------+    +---------+ ¦ pk ¦ ak ¦    ¦ pk ¦ ak ¦ ¦----+----¦    ¦----+----¦ ¦  4 ¦ A  ¦    ¦  1 ¦ A  ¦ ¦  2 ¦ B  ¦    ¦  2 ¦ B  ¦ ¦  3 ¦ C  ¦    ¦  3 ¦ C  ¦ +---------+    +---------+ The single net change there is a change of pk from 4 to 1 for the nonclustered index entry ak = ‘A’.  This is the magic performed by the split, sort, and collapse.  Notice in particular how the original changes to the index key (on the ‘ak’ column) have been transformed into an update of a non-key column (pk is included in the nonclustered index).  By not updating any nonclustered index keys, we are guaranteed to avoid transient key violations. The Execution Plans The estimated MERGE execution plan that produces the incorrect key-violation error looks like this (click to enlarge in a new window): The successful UPDATE execution plan is (click to enlarge in a new window): The MERGE execution plan is a narrow (per-row) update.  The single Clustered Index Merge operator maintains both the clustered index and the filtered nonclustered index.  The UPDATE plan is a wide (per-index) update.  The clustered index is maintained first, then the Split, Filter, Sort, Collapse sequence is applied before the nonclustered index is separately maintained. There is always a wide update plan for any query that modifies the database. The narrow form is a performance optimization where the number of rows is expected to be relatively small, and is not available for all operations.  One of the operations that should disallow a narrow plan is maintaining a unique index where intermediate key violations could occur. Workarounds The MERGE can be made to work (producing a wide update plan with split, sort, and collapse) by: Adding all columns referenced in the filtered index’s WHERE clause to the index key (INCLUDE is not sufficient); or Executing the query with trace flag 8790 set e.g. OPTION (QUERYTRACEON 8790). Undocumented trace flag 8790 forces a wide update plan for any data-changing query (remember that a wide update plan is always possible).  Either change will produce a successfully-executing wide update plan for the MERGE that failed previously. Conclusion The optimizer fails to spot the possibility of transient unique key violations with MERGE under the conditions listed at the start of this post.  It incorrectly chooses a narrow plan for the MERGE, which cannot provide the protection of a split/sort/collapse sequence for the nonclustered index maintenance. The MERGE plan may fail at execution time depending on the order in which rows are processed, and the distribution of data in the database.  Worse, a previously solid MERGE query may suddenly start to fail unpredictably if a filtered unique index is added to the merge target table at any point. Connect bug filed here Tests performed on SQL Server 2012 SP1 CUI (build 11.0.3321) x64 Developer Edition © 2012 Paul White – All Rights Reserved Twitter: @SQL_Kiwi Email: [email protected]

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• CodePlex Daily Summary for Monday, November 26, 2012

  CodePlex Daily Summary for Monday, November 26, 2012Popular ReleasesRedmine Reports: Redmine Reports V 1.0.7: added new sample report added new DateRange feature for report generation (see issue Tracker ID 15372) updated to latest MySql (6.6.4.0)sb0t v.5: sb0t 5.00 alpha 4: First public alpha release. Don't be surprised if it crashes. :)datajs - JavaScript Library for data-centric web applications: datajs version 1.1.0: datajs is a cross-browser and UI agnostic JavaScript library that enables data-centric web applications with the following features: OData client that enables CRUD operations including batching and metadata support using both ATOM and JSON payloads. Single store abstraction that provides a common API on top of HTML5 local storage technologies. Data cache component that allows reading data ranges from a collection and storing them locally to reduce the number of network requests. Changes...VFPX: Code Analyst 1.0.3: Code Analyst 1.0.3 addresses a bug discovered with FoxCodePlus where the initialization code does not properly recognize the location of the folder as well as some of the open issues in the Issue Tracker.Team Foundation Server Administration Tool: 2.2: TFS Administration Tool 2.2 supports the Team Foundation Server 2012 Object Model. Visual Studio 2012 or Team Explorer 2012 must be installed before you can install this tool. You can download and install Team Explorer 2012 from http://aka.ms/TeamExplorer2012. There are no functional changes between the previous release (2.1) and this release.XrmServiceToolkit - A CRM 2011 JavaScript Library: XrmServiceToolkit 1.3.1: Version: 1.3.1 Date: November, 2012 Dependency: JSON2, jQuery (latest or 1.7.2 above) New Feature - A change of logic to increase peroformance when returning large number of records New Function - XrmServiceToolkit.Soap.QueryAll: Return all available records by query options (>5k+) New Fix - XrmServiceToolkit.Rest.RetrieveMultiple not returning records more than 50 New Fix - XrmServiceToolkit.Soap.Business error when refering number fields like (int, double, float) New ...Coding Guidelines for C# 3.0, C# 4.0 and C# 5.0: Coding Guidelines for CSharp 3.0, 4.0 and 5.0: See Change History for a detailed list of modifications.Math.NET Numerics: Math.NET Numerics v2.3.0: Portable Library Build: Adds support for WP8 (.Net 4.0 and higher, SL5, WP8 and .NET for Windows Store apps) New: portable build also for F# extensions (.Net 4.5, SL5 and .NET for Windows Store apps) NuGet: portable builds are now included in the main packages, no more need for special portable packages Linear Algebra: Continued major storage rework, in this release focusing on vectors (previous release was on matrices) Thin QR decomposition (in addition to existing full QR) Static Cr...ExtJS based ASP.NET 2.0 Controls: FineUI v3.2.1: +2012-11-25 v3.2.1 +????????。 -MenuCheckBox?CheckedChanged??????，??????????。 -???????window.IDS??????????????。 -?????（??TabCollection，ControlBaseCollection）???，????????????????。 +Grid??。 -??SelectAllRows??。 -??PageItems??，?????????????，?????、??、?????。 -????grid/gridpageitems.aspx、grid/gridpageitemsrowexpander.aspx、grid/gridpageitems_pagesize.aspx。 -???????????????????。 -??ExpandAllRowExpanders??，?????????????????（grid/gridrowexpanderexpandall2.aspx）。 -??????ExpandRowExpande...VidCoder: 1.4.9 Beta: Updated HandBrake core to SVN 5079. Fixed crashes when encoding DVDs with title gaps.ZXing.Net: ZXing.Net 0.10.0.0: On the way to a release 1.0 the API should be stable now with this version. sync with rev. 2521 of the java version windows phone 8 assemblies improvements and fixesCharmBar: Windows 8 Charm Bar for Windows 7: Windows 8 Charm Bar for Windows 7BlackJumboDog: Ver5.7.3: 2012.11.24 Ver5.7.3 (1)SMTP???????、?????????、??????????????????????? (2)?????????、?????????????????????????? (3)DNS???????CNAME????CNAME????????????????? (4)DNS????????????TTL???????? (5)???????????????????????、?????????????????? (6)???????????????????????????????Liberty: v3.4.3.0 Release 23rd November 2012: Change Log -Added -H4 A dialog which gives further instructions when attempting to open a "Halo 4 Data" file -H4 Added a short note to the weapon editor stating that dropping your weapons will cap their ammo -Reach Edit the world's gravity -Reach Fine invincibility controls in the object editor -Reach Edit object velocity -Reach Change the teams of AI bipeds and vehicles -Reach Enable/disable fall damage on the biped editor screen -Reach Make AIs deaf and/or blind in the objec...Umbraco CMS: Umbraco 4.11.0: NugetNuGet BlogRead the release blog post for 4.11.0. Whats new50 bugfixes (see the issue tracker for a complete list) Read the documentation for the MVC bits. Breaking changesGetPropertyValue now returns an object, not a string (only affects upgrades from 4.10.x to 4.11.0) NoteIf you need Courier use the release candidate (as of build 26). The code editor has been greatly improved, but is sometimes problematic in Internet Explorer 9 and lower. Previously it was just disabled for IE and...Audio Pitch & Shift: Audio Pitch And Shift 5.1.0.3: Fixed supported files list on open dialog (added .pls and .m3u) Impulse Media Player splash message (can be disabled anyway)WiX Toolset: WiX v3.7 RC: WiX v3.7 RC (3.7.1119.0) provides feature complete Bundle update and reference tracking plus several bug fixes. For more information see Rob's blog post about the release: http://robmensching.com/blog/posts/2012/11/20/WiX-v3.7-Release-Candidate-availablePicturethrill: Version 2.11.20.0: Fixed up Bing image provider on Windows 8Excel AddIn to reset the last worksheet cell: XSFormatCleaner.xla: Modified the commandbar code to use CommandBar IDs instead of English names.Json.NET: Json.NET 4.5 Release 11: New feature - Added ITraceWriter, MemoryTraceWriter, DiagnosticsTraceWriter New feature - Added StringEscapeHandling with options to escape HTML and non-ASCII characters New feature - Added non-generic JToken.ToObject methods New feature - Deserialize ISet<T> properties as HashSet<T> New feature - Added implicit conversions for Uri, TimeSpan, Guid New feature - Missing byte, char, Guid, TimeSpan and Uri explicit conversion operators added to JToken New feature - Special case...New ProjectsAirlocker: Airlocker is a lightweight yet effective backup software. Right-click your folder, select "Send To -> Airlocker", and that's all! Next time you do it, only new & changed files will be copied.Architecture Lab: Domain as XML: Domain as XML - Driven Development: Visual Studio Code SamplesBase de datos 2 Farmacia distribuida: This is my summaryBullfrog project 2k11: This project was our entry for the XNA challenge 2011 at Games Fleadh. This is currently being used for a college project.CedarLogic SharePoint Utilities and Extensions: Various utilities, tools, features that provide cross cutting capabilities in support of Windows SharePoint Services 3.0 and Microsoft Office SharePoint Server 2007.Concurrent Extensions Library (CEL): Concurrent Extensions Library (CEL) provides functionality and implementations commonly useful in concurrent programming. CookieChipper - Tasty treats!: Explore your IE cookie cache dispaying forensic information, lock favorite cookies, delete all unlocked, search, manage, enjoy!CqRS Event Sourcing Sample: CqRS SampleCrivo de Erastóteles: Simples programa que devolve à você todos os números primos entre 1 e 1 bilhão em um arquivo de saída chamado "primos.txt" Simply program returns all prime numbers from 1 to 1 bi into a "primos.txt" out file.DonNicky.Common: A set of helpers for everyday coding: extensions for common purpose classes like Type, IEnumerable or Assembly, reflection routines, xml parsing and validation.DotNetDevNet iPhone App: Now you can find out what meetings are being held at DotNetDevNet through your iPhone. Information on the meeting and the speakersEuro for Windows XP: A simple tool and sample to change Estonian currency from Estonian Krone (kr) to Euro (€). Applies to all versions of Windows and from .NET 2.0 which is default build. The sample creates a custom locale and updates existing users through Registry.Floridum: Project for a XML Database.FsSignals: FsSignals is a push reactive library. Fuse8.CMF: Free Content Management System based on Microsoft ASP.NET MVC 3Fuse8.DF.Practicies: Domain Framework Best practicesFuse8.GlobalisationFramework: GlobalizationHatena Netfx Library: .NET Library for Hatena Services.Ideopuzzle: A puzzle gameinohigo: a programming language that was developed by inohiro.jasBetaApplication: Beta place for the JAS-applicationJasmine - Community Management Infrastructure: "Jasmine" is a XML based Community Management Infrastructure.Jupiter Toolkit: Jupiter Toolkit was a temporary name used for WinRT XAML Toolkit. If you clicked a link to get here - replace jupitertoolkit with winrtxamltoolkit in the URL.Kiwi Repo: Il modo più semplice per creare e gestire i tuoi repository cydia su windowsKnak: .NET APIs for CLR Type Mapping and Micro-ORM. Fast and intuitive, convention based, delivered in small C# source files.Micajah Mindtouch Deki Wiki Copier: Small C# application to move data between 2 Deki Wiki installs or, more importantly, from a wik.is account to a locally installed systemmisframework: misframeworkMulyareksa Jayasakti Accounting: Sistem Informasi Akunting Penjualan Jasa PT Mulyareksa Jayasakti SemarangMutualGuaranteeOnlineServices: MutualGuaranteeOnlineServicesMySQL PowerShell Extensions: MySQL PowerShell Extensions Provides a set of PowerShell Cmdlets to manipulate remote or local MySQL Database Server.Old Book Transaction: Website trao d?i sách cu.OneFineDay: ???Paymill Wrapper .NET: Paymill Wrapper. NET is an API for easy integration for recurring billings and payments online through the product https://www.paymill.comPoliceHealth: Police Health SystemRbac_Eshoping: Rbac Std ProjectRhombus: Rhombus is a suite of applications to make it easier for small software teams to document what they and others are doing with a minimum of effort. It is developed on the .NET 4.0 framework, primarily in C# and ASP.NET.Rollout Sharepoint Solutions - ROSS: ROSS performs the following actions: - Delete sitecollection and restart services - 'Get Latest Version' from SourceSafe - Rebuild Solution - Install all wsp solutions - Create SiteCollections - Check for build en provisioning errors - Send email to developers if errors occurredRooBooks: RooBooks - Books management tool for students and such. (circa 2004)SEI_Parkour: “Project ParkOUR” is the codename for the product being developed by members of the Software Engineering Incorporated team.Simple Memory: A simple Memory. You can define the dimension x*y. Also there are two playing modes possible. - Pairs with the same cards (classical memory) - Pairs with different cards (find the same meaning)Simples: A dot-net-a-ma-bob eco-system designed to be 'simples' to use.Slatebox.js: Real-time mind-mapping and concept drawing.Sychevs: ?????????? ?????Tambourine.NUnit: Provides pivot report creating from NUnit combinatorial test result xml files. Also supports viewing of pivot data and its exporting to xlsx.TheAssassin's OpenSource Software: Open source software for everyone's use. Mostly written in Python 3 (3.2, 3.3).Titan: a lightweight object-relational mapping framework TT: Awesome TT appUkázkové projekty: Obsahuje ukázkové projekty uživatele TenCoKaciStromy.Unified Cloud API: This API aims to provide a single interface for different cloud-based services and their corresponding providers.VolgaTransTelecomClient: VolgaTransTelecomClient makes it easier for clients of "Volga TransTelecom" company to get info about account. It's developed in C#.Windows Phone Shortcuts: This a windows phone app project. Shortcuts for Bluetooth, Wi-Fi, Cellular, Airplane Mode from the Start Screen.WPFResumeVideo: Play video on any computer, and resume where you left offWyvern's Depot: Personal code repository.?????????: ??????????，???。

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• CodePlex Daily Summary for Thursday, April 12, 2012

  CodePlex Daily Summary for Thursday, April 12, 2012Popular ReleasesSnmpMessenger: 0.1.1.1: Project Description SnmpMessenger, a messenger. Using the SNMP protocol to exchange messages. It's developed in C#. SnmpMessenger For .Net 4.0, Mono 2.8. Support SNMP V1, V2, V3. Features Send get, set and other requests and get the response. Send and receive traps. Handle requests and return the response. Note This library is compliant with the Common Language Specification(CLS). The latest version is 0.1.1.1. It is only a messenger, does not involve VACM. Any problems, Please mailto: wa...Python Tools for Visual Studio: 1.1.1: We’re pleased to announce the release of Python Tools for Visual Studio 1.1.1. Python Tools for Visual Studio (PTVS) is an open-source plug-in for Visual Studio which supports programming with the Python language. PTVS supports a broad range of features including: • Supports CPython and IronPython • Python editor with advanced member and signature intellisense • Code navigation: “Find all refs”, goto definition, and object browser • Local and remote debugging • Profiling with multiple view...Supporting Guidance and Whitepapers: v1 - Team Foundation Service Whitepapers: Welcome to the BETA release of the Team Foundation Service Whitepapers preview As this is a BETA release and the quality bar for the final Release has not been achieved, we value your candid feedback and recommend that you do not use or deploy these BETA artifacts in a production environment. Quality-Bar Details Documentation has been reviewed by Visual Studio ALM Rangers Documentation has been through an independent technical review All critical bugs have been resolved Known Issue...Microsoft .NET Gadgeteer: .NET Gadgeteer Core 2.42.550 (BETA): Microsoft .NET Gadgeteer Core RELEASE NOTES Version 2.42.550 11 April 2012 BETA VERSION WARNING: This is a beta version! Please note: - API changes may be made before the next version (2.42.600) - The designer will not show modules/mainboards for NETMF 4.2 until you get upgraded libraries from the module/mainboard vendors - Install NETMF 4.2 (see link below) to use the new features of this release That warning aside, this version should continue to sup...DISM GUI: DISM GUI 3.1.1: Fixes - Fixed a bug in the Delete Driver function - The Index field is now auto populated with the number 1LINQ to Twitter: LINQ to Twitter Beta v2.0.24: Supports .NET 3.5, .NET 4.0, Silverlight 4.0, Windows Phone 7.1, and Client Profile. 100% Twitter API coverage. Also available via NuGet.Kendo UI ASP.NET Sample Applications: Sample Applications (2012-04-11): Sample application(s) demonstrating the use of Kendo UI in ASP.NET applications.Json.NET: Json.NET 4.5 Release 2: New feature - Added support for the SerializableAttribute and serializing a type's internal fields New feature - Added MaxDepth to JsonReader/JsonSerializer/JsonSerializerSettings New feature - Added support for ignoring properties with the NonSerializableAttribute Fix - Fixed deserializing a null string throwing a NullReferenceException Fix - Fixed JsonTextReader reading from a slow stream Fix - Fixed CultureInfo not being overridden on JsonSerializerProxy Fix - Fixed full trust ...SCCM Client Actions Tool: SCCM Client Actions Tool v1.12: SCCM Client Actions Tool v1.12 is the latest version. It comes with following changes since last version: Improved WMI date conversion to be aware of timezone differences and DST. Fixed new version check. The tool is downloadable as a ZIP file that contains four files: ClientActionsTool.hta – The tool itself. Cmdkey.exe – command line tool for managing cached credentials. This is needed for alternate credentials feature when running the HTA on Windows XP. Cmdkey.exe is natively availab...Dual Browsing: Dual Browser: Please note the following: I setup the address bar temporarily to only accepts http:// .com addresses. Just type in the name of the website excluding: http://, www., and .com; (Ex: for www.youtube.com just type: youtube then click OK). The page splitter can be grabbed by holding down your left mouse button and move left or right. By right clicking on the page background, you can choose to refresh, go back a page and so on. Demo video: http://youtu.be/L7NTFVM3JUYCslaGenFork: Rules sample v.1.1.0: On projects for CSLA v.4.2.2, added 5 new Business Rules: - DependencyFrom - RequiredWhenCanWrite - RequiredWhenIsNotNew - RequiredWhenNew - StopIfNotFieldExists Added new projects for CSLA v.4.3.10 with 6 new Business Rules: - DependencyFrom - FieldExists - RequiredWhenCanWrite - RequiredWhenIsNotNew - RequiredWhenNew - StopIfNotFieldExists Following CSLA convention, SL stands for Silverligth 5 and SL4 stands for Silverlight 4. NOTE - Although the projects for CSLA v.4.1.0 still exist, thi...Multiwfn: Multiwfn 2.3.3: Multiwfn 2.3.3Liberty: v3.2.0.1 Release 9th April 2012: Change Log-Fixed -Reach Fixed a bug where the object editor did not work on non-English operating systemsCommonData - Common Functions for ASP.NET projects: CommonData 0.3L: Common Data has been updated to the latest NUnit (2.6.0) The demo project has been updated with an example on how to correctly compare a floating point value.ASP.Net MVC Dynamic JS/CSS Script Compression Framework: Initial Stable: Initial Stable Version Contains Source for Compression Library and example for usage in web application.Path Copy Copy: 10.1: This release addresses the following work items: 11357 11358 11359 This release is a recommended upgrade, especially for users who didn't install the 10.0.1 version.ExtAspNet: ExtAspNet v3.1.3: ExtAspNet - ?? ExtJS ??? ASP.NET 2.0 ???，????? AJAX ?????????? ExtAspNet ????? ExtJS ??? ASP.NET 2.0 ???，????? AJAX ??????????。 ExtAspNet ??????? JavaScript，?? CSS，?? UpdatePanel，?? ViewState，?? WebServices ???????。 ??????: IE 7.0, Firefox 3.6, Chrome 3.0, Opera 10.5, Safari 3.0+ ????：Apache License 2.0 (Apache) ??：http://extasp.net/ ??：http://bbs.extasp.net/ ??：http://extaspnet.codeplex.com/ ??：http://sanshi.cnblogs.com/ ????： +2012-04-08 v3.1.3 -??Language="zh_TW"?JS???BUG（??）。 +?D...Coding4Fun Tools: Coding4Fun.Phone.Toolkit v1.5.5: New Controls ChatBubble ChatBubbleTextBox OpacityToggleButton New Stuff TimeSpan languages added: RU, SK, CS Expose the physics math from TimeSpanPicker Image Stretch now on buttons Bug Fixes Layout fix so RoundToggleButton and RoundButton are exactly the same Fix for ColorPicker when set via code behind ToastPrompt bug fix with OnNavigatedTo Toast now adjusts its layout if the SIP is up Fixed some issues with Expression Blend supportHarness - Internet Explorer Automation: Harness 2.0.3: support the operation fo frameset, frame and iframe Add commands SwitchFrame GetUrl GoBack GoForward Refresh SetTimeout GetTimeout Rename commands GetActiveWindow to GetActiveBrowser SetActiveWindow to SetActiveBrowser FindWindowAll to FindBrowser NewWindow to NewBrowser GetMajorVersion to GetVersionBetter Explorer: Better Explorer 2.0.0.861 Alpha: - fixed new folder button operation not work well in some situations - removed some unnecessary code like subclassing that is not needed anymore - Added option to make Better Exlorer default (at least for WIN+E operations) - Added option to enable file operation replacements (like Terracopy) to work with Better Explorer - Added some basic usability to "Share" button - Other fixesNew ProjectsAzure Diagnostics Monitor: Just another tool to monitor the Windows Azure Diagnostics logs. The tool runs on Windows and requires .NET Framework 4.0.BSF - Business solution framework: BSF covers components and patterns that span from server to client side. It focuses on developer's productivity and rich configurable operational support. Its main goal is to streamline business solution development letting developers focus on business requirements.ceshi: makes it easier for cms cmdb hierarquico: CMDB leve organizado de forma hierárquica, e com opção para ter informações criptografadas CRCMS: CRCMS PhoenixFong Plugin Engine: This is a basic plugin engine that was written in Visual Basic.NET. It can be placed in applications so that they can easily be extended.Golabetoon: This is my AI Project trying to change Finglish writing to FarsiHomeProjects: Collection of Many "Home" ProjectsHyper-V Management Library in C#: A C# library to manage Hyper-V server (network switch settings, VM configurations, etc.) via WMI APIsIQ.DbA: IQ.DbA is a light weight database management tool. - Easily browse through your table's data, run queries. - Compare schema / meta data. - Compare & synchronize table data (schema must be the same). - Create, Backup & Restore Db. - View & kill connections.JavaProjects: Proyectos en javaLLBLGen Pro LINQPad Driver: LINQPad driver for LLBLGen Pro v3.5 or higher. The LLBLGen Pro v3.5 LINQPad driver is the official LINQPad driver for LLBLGen Pro v3.5 from Solutions Design bv. It contains all the features necessary to use your generated code assemblies (adapter or selfservicing) directly onto your database using Linq, QuerySpec or the low-level query api. Developed by Solutions Design and Jeremy Thomas.Mini-C#: Interactive C# interpreter using Roslyn.Orchard HTML KickStart: This Orchard CMS module allows you to activate the HTML KickStart scripts and stylesheets without changing your existing theme. The HTML KickStart scripts and stylesheets can be turned on through settings.persistance_personnels_elabouyi: Projet d'étude test TFSqBugger: Powered by qSoftware the fast ajax Professional Issue Tracker.Realm Offline Server: Nonesaleprice: This project is about sale systemScrum Factory 2012: This is the newest and improved version of The Scrum Factory. Scrum Factory is a client-server application that helps teams to conduct software development projects using Scrum methodology. SQL Server Error Log Parsing module: The SQL Server Error Log Parsing module enables efficient analysis of SQL Server's error log (ERRORLOG). This binary PowerShell module parses the ERRORLOG text file and returns the corresponding message IDs and message parameters.Sql Team Server: Sql Team Server aims to provide database compare and synchronization across project teams and members.T4MVC: T4MVC is a T4 template for ASP.NET MVC apps that creates strongly typed helpers that eliminate the use of literal strings when referring the controllers, actions and views.The HTTP Web Server: The HTTP Web Server is an easy-to-use, FAST web hosting server that is written in C#. It has a built-in Install/Uninstall menu and is console based.The Uncle Tony Project: We're going to test the team explorer thing.tigera: a source depot from 2007-now I had written. + ---- exchanges api & framework VxiChat: P2P chatingWCF Data Services Action Provider for Entity Framework: This is a sample implementation of a WCF Data Services IDataServiceActionProvider for the Entity FrameworkWindows Phone SSLStream: WIPWorld of Warcraft Backit up(wow backit up): a project that helps you backup and restore your settings in wow easilyWT Analyse: A GUI Front end for FAST, using XFOIL, utilising AirfoilPrep Code. Written in C#.wuhua tutorial: wuhuaXSockets.WebRTC.Prototype: This example project of XSockets.NET WebRTC Support using WebSockets, PeerConnection, getUserMedia and more is built to show you how we can put together powerfull Realtime audio/video chats just using the browser.????SDK: Help people find your project. Write a concise, reader-focused summary.

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• TFS API Change WorkItem CreatedDate And ChangedDate To Historic Dates

  - by Tarun Arora

  There may be times when you need to modify the value of the fields “System.CreatedDate” and “System.ChangedDate” on a work item. Richard Hundhausen has a great blog with ample of reason why or why not you should need to set the values of these fields to historic dates. In this blog post I’ll show you, Create a PBI WorkItem linked to a Task work item by pre-setting the value of the field ‘System.ChangedDate’ to a historic date Change the value of the field ‘System.Created’ to a historic date Simulate the historic burn down of a task type work item in a sprint Explain the impact of updating values of the fields CreatedDate and ChangedDate on the Sprint burn down chart Rules of Play      1. You need to be a member of the Project Collection Service Accounts              2. You need to use ‘WorkItemStoreFlags.BypassRules’ when you instantiate the WorkItemStore service // Instanciate Work Item Store with the ByPassRules flag _wis = new WorkItemStore(_tfs, WorkItemStoreFlags.BypassRules);      3. You cannot set the ChangedDate         - Less than the changed date of previous revision         - Greater than current date Walkthrough The walkthrough contains 5 parts 00 – Required References 01 – Connect to TFS Programmatically 02 – Create a Work Item Programmatically 03 – Set the values of fields ‘System.ChangedDate’ and ‘System.CreatedDate’ to historic dates 04 – Results of our experiment Lets get started………………………………………………… 00 – Required References Microsoft.TeamFoundation.dll Microsoft.TeamFoundation.Client.dll Microsoft.TeamFoundation.Common.dll Microsoft.TeamFoundation.WorkItemTracking.Client.dll 01 – Connect to TFS Programmatically I have a in depth blog post on how to connect to TFS programmatically in case you are interested. However, the code snippet below will enable you to connect to TFS using the Team Project Picker. // Services I need access to globally private static TfsTeamProjectCollection _tfs; private static ProjectInfo _selectedTeamProject; private static WorkItemStore _wis; // Connect to TFS Using Team Project Picker public static bool ConnectToTfs() { var isSelected = false; // The user is allowed to select only one project var tfsPp = new TeamProjectPicker(TeamProjectPickerMode.SingleProject, false); tfsPp.ShowDialog(); // The TFS project collection _tfs = tfsPp.SelectedTeamProjectCollection; if (tfsPp.SelectedProjects.Any()) { // The selected Team Project _selectedTeamProject = tfsPp.SelectedProjects[0]; isSelected = true; } return isSelected; } 02 – Create a Work Item Programmatically In the below code snippet I have create a Product Backlog Item and a Task type work item and then link them together as parent and child. Note – You will have to set the ChangedDate to a historic date when you created the work item. Remember, If you try and set the ChangedDate to a value earlier than last assigned you will receive the following exception… TF26212: Team Foundation Server could not save your changes. There may be problems with the work item type definition. Try again or contact your Team Foundation Server administrator. If you notice below I have added a few seconds each time I have modified the ‘ChangedDate’ just to avoid running into the exception listed above. // Create Linked Work Items and return Ids private static List<int> CreateWorkItemsProgrammatically() { // Instantiate Work Item Store with the ByPassRules flag _wis = new WorkItemStore(_tfs, WorkItemStoreFlags.BypassRules); // List of work items to return var listOfWorkItems = new List<int>(); // Create a new Product Backlog Item var p = new WorkItem(_wis.Projects[_selectedTeamProject.Name].WorkItemTypes["Product Backlog Item"]); p.Title = "This is a new PBI"; p.Description = "Description"; p.IterationPath = string.Format("{0}\\Release 1\\Sprint 1", _selectedTeamProject.Name); p.AreaPath = _selectedTeamProject.Name; p["Effort"] = 10; // Just double checking that ByPassRules is set to true if (_wis.BypassRules) { p.Fields["System.ChangedDate"].Value = Convert.ToDateTime("2012-01-01"); } if (p.Validate().Count == 0) { p.Save(); listOfWorkItems.Add(p.Id); } else { Console.WriteLine(">> Following exception(s) encountered during work item save: "); foreach (var e in p.Validate()) { Console.WriteLine(" - '{0}' ", e); } } var t = new WorkItem(_wis.Projects[_selectedTeamProject.Name].WorkItemTypes["Task"]); t.Title = "This is a task"; t.Description = "Task Description"; t.IterationPath = string.Format("{0}\\Release 1\\Sprint 1", _selectedTeamProject.Name); t.AreaPath = _selectedTeamProject.Name; t["Remaining Work"] = 10; if (_wis.BypassRules) { t.Fields["System.ChangedDate"].Value = Convert.ToDateTime("2012-01-01"); } if (t.Validate().Count == 0) { t.Save(); listOfWorkItems.Add(t.Id); } else { Console.WriteLine(">> Following exception(s) encountered during work item save: "); foreach (var e in t.Validate()) { Console.WriteLine(" - '{0}' ", e); } } var linkTypEnd = _wis.WorkItemLinkTypes.LinkTypeEnds["Child"]; p.Links.Add(new WorkItemLink(linkTypEnd, t.Id) {ChangedDate = Convert.ToDateTime("2012-01-01").AddSeconds(20)}); if (_wis.BypassRules) { p.Fields["System.ChangedDate"].Value = Convert.ToDateTime("2012-01-01").AddSeconds(20); } if (p.Validate().Count == 0) { p.Save(); } else { Console.WriteLine(">> Following exception(s) encountered during work item save: "); foreach (var e in p.Validate()) { Console.WriteLine(" - '{0}' ", e); } } return listOfWorkItems; } 03 – Set the value of “Created Date” and Change the value of “Changed Date” to Historic Dates The CreatedDate can only be changed after a work item has been created. If you try and set the CreatedDate to a historic date at the time of creation of a work item, it will not work. // Lets do a work item effort burn down simulation by updating the ChangedDate & CreatedDate to historic Values private static void WorkItemChangeSimulation(IEnumerable<int> listOfWorkItems) { foreach (var id in listOfWorkItems) { var wi = _wis.GetWorkItem(id); switch (wi.Type.Name) { case "ProductBacklogItem": if (wi.State.ToLower() == "new") wi.State = "Approved"; // Advance the changed date by few seconds wi.Fields["System.ChangedDate"].Value = Convert.ToDateTime(wi.Fields["System.ChangedDate"].Value).AddSeconds(10); // Set the CreatedDate to Changed Date wi.Fields["System.CreatedDate"].Value = Convert.ToDateTime(wi.Fields["System.ChangedDate"].Value).AddSeconds(10); wi.Save(); break; case "Task": // Advance the changed date by few seconds wi.Fields["System.ChangedDate"].Value = Convert.ToDateTime(wi.Fields["System.ChangedDate"].Value).AddSeconds(10); // Set the CreatedDate to Changed date wi.Fields["System.CreatedDate"].Value = Convert.ToDateTime(wi.Fields["System.ChangedDate"].Value).AddSeconds(10); wi.Save(); break; } } // A mock sprint start date var sprintStart = DateTime.Today.AddDays(-5); // A mock sprint end date var sprintEnd = DateTime.Today.AddDays(5); // What is the total Sprint duration var totalSprintDuration = (sprintEnd - sprintStart).Days; // How much of the sprint have we already covered var noOfDaysIntoSprint = (DateTime.Today - sprintStart).Days; // Get the effort assigned to our tasks var totalEffortRemaining = QueryTaskTotalEfforRemaining(listOfWorkItems); // Defining how much effort to burn every day decimal dailyBurnRate = totalEffortRemaining / totalSprintDuration < 1 ? 1 : totalEffortRemaining / totalSprintDuration; // we have just created one task var totalNoOfTasks = 1; var simulation = sprintStart; var currentDate = DateTime.Today.Date; // Carry on till effort has been burned down from sprint start to today while (simulation.Date != currentDate.Date) { var dailyBurnRate1 = dailyBurnRate; // A fixed amount needs to be burned down each day while (dailyBurnRate1 > 0) { // burn down bit by bit from all unfinished task type work items foreach (var id in listOfWorkItems) { var wi = _wis.GetWorkItem(id); var isDirty = false; // Set the status to in progress if (wi.State.ToLower() == "to do") { wi.State = "In Progress"; isDirty = true; } // Ensure that there is enough effort remaining in tasks to burn down the daily burn rate if (QueryTaskTotalEfforRemaining(listOfWorkItems) > dailyBurnRate1) { // If there is less than 1 unit of effort left in the task, burn it all if (Convert.ToDecimal(wi["Remaining Work"]) <= 1) { wi["Remaining Work"] = 0; dailyBurnRate1 = dailyBurnRate1 - Convert.ToDecimal(wi["Remaining Work"]); isDirty = true; } else { // How much to burn from each task? var toBurn = (dailyBurnRate / totalNoOfTasks) < 1 ? 1 : (dailyBurnRate / totalNoOfTasks); // Check that the task has enough effort to allow burnForTask effort if (Convert.ToDecimal(wi["Remaining Work"]) >= toBurn) { wi["Remaining Work"] = Convert.ToDecimal(wi["Remaining Work"]) - toBurn; dailyBurnRate1 = dailyBurnRate1 - toBurn; isDirty = true; } else { wi["Remaining Work"] = 0; dailyBurnRate1 = dailyBurnRate1 - Convert.ToDecimal(wi["Remaining Work"]); isDirty = true; } } } else { dailyBurnRate1 = 0; } if (isDirty) { if (Convert.ToDateTime(wi.Fields["System.ChangedDate"].Value).Date == simulation.Date) { wi.Fields["System.ChangedDate"].Value = Convert.ToDateTime(wi.Fields["System.ChangedDate"].Value).AddSeconds(20); } else { wi.Fields["System.ChangedDate"].Value = simulation.AddSeconds(20); } wi.Save(); } } } // Increase date by 1 to perform daily burn down by day simulation = Convert.ToDateTime(simulation).AddDays(1); } } // Get the Total effort remaining in the current sprint private static decimal QueryTaskTotalEfforRemaining(List<int> listOfWorkItems) { var unfinishedWorkInCurrentSprint = _wis.GetQueryDefinition( new Guid(QueryAndGuid.FirstOrDefault(c => c.Key == "Unfinished Work").Value)); var parameters = new Dictionary<string, object> { { "project", _selectedTeamProject.Name } }; var q = new Query(_wis, unfinishedWorkInCurrentSprint.QueryText, parameters); var results = q.RunLinkQuery(); var wis = new List<WorkItem>(); foreach (var result in results) { var _wi = _wis.GetWorkItem(result.TargetId); if (_wi.Type.Name == "Task" && listOfWorkItems.Contains(_wi.Id)) wis.Add(_wi); } return wis.Sum(r => Convert.ToDecimal(r["Remaining Work"])); }   04 – The Results If you are still reading, the results are beautiful! Image 1 – Create work item with Changed Date pre-set to historic date Image 2 – Set the CreatedDate to historic date (Same as the ChangedDate) Image 3 – Simulate of effort burn down on a task via the TFS API   Image 4 – The history of changes on the Task. So, essentially this task has burned 1 hour per day Sprint Burn Down Chart – What’s not possible? The Sprint burn down chart is calculated from the System.AuthorizedDate and not the System.ChangedDate/System.CreatedDate. So, though you can change the System.ChangedDate and System.CreatedDate to historic dates you will not be able to synthesize the sprint burn down chart. Image 1 – By changing the Created Date and Changed Date to ‘18/Oct/2012’ you would have expected the burn down to have been impacted, but it won’t be, because the sprint burn down chart uses the value of field ‘System.AuthorizedDate’ to calculate the unfinished work points. The AsOf queries that are used to calculate the unfinished work points use the value of the field ‘System.AuthorizedDate’. Image 2 – Using the above code I burned down 1 hour effort per day over 5 days from the task work item, I would have expected the sprint burn down to show a constant burn down, instead the burn down shows the effort exhausted on the 24th itself. Simply because the burn down is calculated using the ‘System.AuthorizedDate’. Now you would ask… “Can I change the value of the field System.AuthorizedDate to a historic date” Unfortunately that’s not possible! You will run into the exception ValidationException –  “TF26194: The value for field ‘Authorized Date’ cannot be changed.” Conclusion - You need to be a member of the Project Collection Service account group in order to set the fields ‘System.ChangedDate’ and ‘System.CreatedDate’ to historic dates - You need to instantiate the WorkItemStore using the flag ByPassValidation - The System.ChangedDate needs to be set to a historic date at the time of work item creation. You cannot reset the ChangedDate to a date earlier than the existing ChangedDate and you cannot reset the ChangedDate to a date greater than the current date time. - The System.CreatedDate can only be reset after a work item has been created. You cannot set the CreatedDate at the time of work item creation. The CreatedDate cannot be greater than the current date. You can however reset the CreatedDate to a date earlier than the existing value. - You will not be able to synthesize the Sprint burn down chart by changing the value of System.ChangedDate and System.CreatedDate to historic dates, since the burn down chart uses AsOf queries to calculate the unfinished work points which internally uses the System.AuthorizedDate and NOT the System.ChangedDate & System.CreatedDate - System.AuthorizedDate cannot be set to a historic date using the TFS API Read other posts on using the TFS API here… Enjoy!

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• CodePlex Daily Summary for Monday, June 17, 2013

  CodePlex Daily Summary for Monday, June 17, 2013Popular ReleasesKooboo CMS: Kooboo CMS 4.1.1: The stable release of Kooboo CMS 4.1.0 with fixed the following issues: https://github.com/Kooboo/CMS/issues/1 https://github.com/Kooboo/CMS/issues/11 https://github.com/Kooboo/CMS/issues/13 https://github.com/Kooboo/CMS/issues/15 https://github.com/Kooboo/CMS/issues/19 https://github.com/Kooboo/CMS/issues/20 https://github.com/Kooboo/CMS/issues/24 https://github.com/Kooboo/CMS/issues/43 https://github.com/Kooboo/CMS/issues/45 https://github.com/Kooboo/CMS/issues/46 https://github....VidCoder: 1.5.0 Beta: The betas have started up again! If you were previously on the beta track you will need to install this to get back on it. That's because you can now run both the Beta and Stable version of VidCoder side-by-side! Note that the OpenCL and Intel QuickSync changes being tested by HandBrake are not in the betas yet. They will appear when HandBrake integrates them into the main branch. Updated HandBrake core to SVN 5590. This adds a new FDK AAC encoder. The FAAC encoder has been removed and now...Wsus Package Publisher: Release v1.2.1306.16: Date/Time are displayed as Local Time. (Last Contact, Last Report and DeadLine) Wpp now remember the last used path for update publishing. (See 'Settings' Form for options) Add an option to allow users to publish an update even if the Framework has judged the certificate as invalid. (Attention : Using this option will NOT allow you to publish or revise an update if your certificate is really invalid). When publishing a new update, filter update files to ensure that there is not files wi...Employee Info Starter Kit: v6.0 - ASP.NET MVC Edition: Release Home - Getting Started - Hands on Coding Walkthrough – Technology Stack - Design & Architecture EISK v6.0 – ASP.NET MVC edition bundles most of the greatest and successful platforms, frameworks and technologies together, to enable web developers to learn and build manageable and high performance web applications with rich user experience effectively and quickly. User End SpecificationsCreating a new employee record Read existing employee records Update an existing employee reco...OLAP PivotTable Extensions: Release 0.8.1: Use the 32-bit download for... Excel 2007 Excel 2010 32-bit (even Excel 2010 32-bit on a 64-bit operating system) Excel 2013 32-bit (even Excel 2013 32-bit on a 64-bit operating system) Use the 64-bit download for... Excel 2010 64-bit Excel 2013 64-bit Just download and run the EXE. There is no need to uninstall the previous release. If you have problems getting the add-in to work, see the Troubleshooting Installation wiki page. The new features in this release are: View #VALUE! Err...DirectXTex texture processing library: June 2013: June 15, 2013 Custom filtering implementation for Resize & GenerateMipMaps(3D) - Point, Box, Linear, Cubic, and Triangle TEX_FILTER_TRIANGLE finite low-pass triangle filter TEX_FILTER_WRAP, TEX_FILTER_MIRROR texture semantics for custom filtering TEX_FILTER_BOX alias for TEX_FILTER_FANT WIC Ordered and error diffusion dithering for non-WIC conversion sRGB gamma correct custom filtering and conversion DDS_FLAGS_EXPAND_LUMINANCE - Reader conversion option for L8, L16, and A8L8 legacy ...WPF Application Framework (WAF): WPF Application Framework (WAF) 3.0.0.440: Version: 3.0.0.440 (Release Candidate): This release contains the source code of the WPF Application Framework (WAF) and the sample applications. Please build the whole solution before you start one of the sample applications. Requirements .NET Framework 4.5 (The package contains a solution file for Visual Studio 2012) Changelog Legend: [B] Breaking change; [O] Marked member as obsolete Samples: Use ValueConverters via StaticResource instead of x:Static. Other Downloads Downloads OverviewWatchersNET.TagCloud: WatchersNET.TagCloud 02.02.03: changes Common Words are limited to the current PortalSFDL.NET: SFDL.NET v1.1.0.5: Changelog: Implemeted SFDL Container v4 (AES Encryption, Set Character Set) Added Stopwatch (download time) Many Bugfixes and ImprovementsBlackJumboDog: Ver5.9.1: 2013.06.13 Ver5.9.1 (1) Web??????SSI?#include???、CGI?????????????????????? (2) ???????????????????????????Lakana - WPF Framework: Lakana V2.1 RTM: - Dynamic text localization - A new application wide message busFree language translator and file converter: Free Language Translator 3.3: some bug fixes and a new link to video tutorials on Youtube.Pokemon Battle Online: ETV: ETV???2012?12??????，????，???????$/PBO/branches/PrivateBeta??。 ???????bug???????。 ???? Server??????，?????。 ?????????，?????????????，?????????。 ????????，????，?????????，???????????（??）??。 ???? ????????????。 ???????。 ???PP????，????????????????????PP????，??3。 ?????????????，??????????。 ???????? ??? ?? ???? ??? ???? ?? ?????????? ?? ??? ??? ??? ???????? ???? ???? ???????????????、???????????，??“???????”??。 ???bug ???Modern UI for WPF: Modern UI 1.0.4: The ModernUI assembly including a demo app demonstrating the various features of Modern UI for WPF. Related downloads NuGet ModernUI for WPF is also available as NuGet package in the NuGet gallery, id: ModernUI.WPF Download Modern UI for WPF Templates A Visual Studio 2012 extension containing a collection of project and item templates for Modern UI for WPF. The extension includes the ModernUI.WPF NuGet package. DownloadToolbox for Dynamics CRM 2011: XrmToolBox (v1.2013.6.11): XrmToolbox improvement Add exception handling when loading plugins Updated information panel for displaying two lines of text Tools improvementMetadata Document Generator (v1.2013.6.10)New tool Web Resources Manager (v1.2013.6.11)Retrieve list of unused web resources Retrieve web resources from a solution All tools listAccess Checker (v1.2013.2.5) Attribute Bulk Updater (v1.2013.1.17) FetchXml Tester (v1.2013.3.4) Iconator (v1.2013.1.17) Metadata Document Generator (v1.2013.6.10) Privilege...Document.Editor: 2013.23: What's new for Document.Editor 2013.23: New Insert Emoticon support Improved Format support Minor Bug Fix's, improvements and speed upsChristoc's DotNetNuke Module Development Template: DotNetNuke 7 Project Templates V2.4 for VS2012: V2.4 - Release Date 6/10/2013 Items addressed in this 2.4 release Updated MSBuild Community Tasks reference to 1.4.0.61 Setting up your DotNetNuke Module Development Environment Installing Christoc's DotNetNuke Module Development Templates Customizing the latest DotNetNuke Module Development Project TemplatesLayered Architecture Sample for .NET: Leave Sample - June 2013 (for .NET 4.5): Thank You for downloading Layered Architecture Sample. Please read the accompanying README.txt file for setup and installation instructions. This is the first set of a series of revised samples that will be released to illustrate the layered architecture design pattern. This version is only supported on Visual Studio 2012. This set contains 2 samples that illustrates the use of: ASP.NET Web Forms, ASP.NET Model Binding, Windows Communications Foundation (WCF), Windows Workflow Foundation (W...Papercut: Papercut 2013-6-10: Feature: Shows From, To, Date and Subject of Email. Feature: Async UI and loading spinner. Enhancement: Improved speed when loading large attachments. Enhancement: Decoupled SMTP server into secondary assembly. Enhancement: Upgraded to .NET v4. Fix: Messages lost when received very fast. Fix: Email encoding issues on display/Automatically detect message Encoding Installation Note:Installation is copy and paste. Incoming messages are written to the start-up directory of Papercut. If you do n...Supporting Guidance and Whitepapers: v1.BETA Unit test Generator Documentation: Welcome to the Unit Test Generator Once you’ve moved to Visual Studio 2012, what’s a dev to do without the Create Unit Tests feature? Based on the high demand on User Voice for this feature to be restored, the Visual Studio ALM Rangers have introduced the Unit Test Generator Visual Studio Extension. 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More Information and Downloads available soon.DSM Web API: The "DSM Web API" project provides portable libraries to call the APIs exposed by a Synology's NAS running the DSM system.everynetsvn: this is a summary description.Extension Library: Provides a library of extension methods for commonly used .NET objects.Finance: this is a new projectFlight: A simple flight simulator with basic physics. Written in Java using the Processing library.gerencia2: This project is about a test of codeplex use whit a smal group of people, actually just two.GMFrameworkForBlog: MVC,EF,Framework,GMFHad: Had jean0617changbranch: jean0617changbranchLCC Handler V1.0: Complete software pack to handle Local Cheque Collection activities in Branches in India and abroad. This small software can handle folowing activities;Mdelete API: Delete all files and directores in windows shell. Support long path (less then 32000 chars) and network path (eg. \\server\share or \\127.0.0.1\share)Model View ViewModel with Controller: Build applications based on the Model-View-ViewModel philosophy! MySQL Connect 2 ASP.NET: Example project to show how to connect MySQL database to ASP.NET web project. IDE: Visual Studio 2010 Pro Programming language: C# Detailed information in the article here: http://epavlov.net/blog/2011/11/13/connect-to-mysql-in-visual-studio/ NEaTly Documented Code: NEaTly Documented Code helps documenting source code by taking comments directly from sources and by formatting them in a easy-to-read way. This is perfect for programming blog, for example. This project is inspired by (but not based on) Beautifully Documented Codenewsalert: this is a news alert project description.On-Screen Keyboard: An OnScreen Keyboad that accept both inputs of keyboard and mousePHP DocBlock Generator: Creates missing docblocks.Puzzle: Puzzle game. Add your image and hace fun! ;)QuickUIT: QuickUIT, short for 'Quick User Interface Testing', is an API for testing applications based on the Microsoft UI Automation framework. QuickUIT provides a simple, object-oriented interface for finding and interacting with automation elements. It is developed in C#. RapidXNA: A simple framework that aims to make starting up new XNA projects for Windows, Xbox 360 and Windows Phone 7 easier. Using RapidXNA you should be able to easily port between the 3 platforms with only minor code changes to your projects.Send HTML Wizard: Wizard to send a local html page, including referenced files, as emailSetup for Converting OLM to PST with Outlook OLM File Exporter: You can convert files from OLM to PST to access Mac Outlook on Windows Outlook using the Outlook Mac Exporter. Tool can be availed in FREE Download.Signalbox: Train dispatching simulation.Store Front: Welcome to store front this is going to built for the community by the community im sick of not having a word press style system in asp.net form for developers TLS: TLSTorrent & Podcast plugins: My Podcasts and My Torrents plugins for MediaPortalTorrentSimulation: This is a student project as academic activities.UnitXMLEditor: UnitXMLEditoruVersionClientCache: uVersionClientCache is a custom macro to always automatically version (URL querstring parameter) your files based on a MD5 hash of the file contents or file last modified date to prevent issues with client browsers caching an old file after you have changed it.Video Katalog: Upravljanje arhivom video materijalaVpNet binding for SignalR: VPNET for SignalR is a binding to Microsoft SignalR JQuery web socket implementation.Warlab: ???????????? ?????? ?? ??????WPF Diagram Designer Resourse: WPF Diagram Designer Resourse

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• Stumbling Through: Visual Studio 2010 (Part I)

  Ive spent the better part of the last two years doing nothing but K2 workflow development, which until very recently could only be done in Visual Studio 2005 so I am a bit behind the times. I seem to have skipped over using Visual Studio 2008 entirely, and I am now ready to stumble through all that Ive missed. Not that I will abandon my K2 ramblings, but I need to get back to some of the other technologies I am passionate about but havent had the option of working with them on a day-to-day basis as I have with K2 blackpearl. Specifically, I am going to be focusing my efforts on what is new in the Entity Framework and WPF in Visual Studio 2010, though you have to keep in mind that since I have skipped VS 2008, I may be giving VS 2010 credit for things that really have been around for a while (hey, if I havent seen it, it is new to me!). I have the following simple goals in mind for this exercise: Entity Framework Model an inherited class Entity Framework Model a lookup entity WPF Bind a list of entities WPF - on selection of an entity in the bound list, display values of the selected entity WPF For the lookup field, provide a dropdown of potential values to lookup All of these goals must be accomplished using as little code as possible, relying on the features we get out of the box in Visual Studio 2010. This isnt going to be rocket science here, Im not even looking to get or save this data from/to a data source, but I gotta start somewhere and hopefully it will grow into something more interesting. For this exercise, I am going to try to model some fictional data about football players and personnel (maybe turning this into some sort of NFL simulation game if I lose my job and can play with this all day), so Ill start with a Person class that has a name property, and extend that with a Player class to include a Position lookup property. The idea is that a Person can be a Player, Coach or whatever other personnel type may be associated with a football team but well only flesh out the Player aspect of a person for this. So to get started, I fired up Visual Studio 2010 and created a new WPF Application: To this project, I added a new ADO.NET Entity Data Model named PlayerModel (for now, not sure what will be an appropriate name so this may be revisited): I chose for it to be an empty model, as I dont have a database designed for this yet: Using the toolbox, I dragged out an entity for each of the items we identified earlier: Person, Player and Position, and gave them some simple properties (note that I kept the default Id property for each of them): Now to figure out how to link these things together the way I want to first, lets try to tell it that Player extends Person. I see that Inheritance is one of the items in the toolbox, but I cant seem to drag it out anywhere onto the canvas. However, when I right-click an element, I get the option to Add Inheritance to it, which gives us exactly what we want: Ok, now that we have that, how do we tell it that each player has a position? Well, despite association being in the toolbox, I have learned that you cant just drag and drop those elements so I right click Player and select Add -> Association to get the following dialog: I see the option here to Add foreign key properties to my entities Ive read somewhere this this is a new and highly-sought after feature so Ill see what it does. Selecting it includes a PositionId on the Player element for me, which seems pretty database-centric and I would like to see if I can live without it for now given that we also got the Position property out of this association. Ill bring it back into the fold if it ends up being useful later. Here is what we end up with now: Trying to compile this resulted in an error stating that the Player entity cannot have an Id, because the Person element it extends already has a property named Id. Makes sense, so I remove it and compile again. Success, but with a warning but success is a good thing so Ill pretend I didnt see that warning for now. It probably has to do with the fact that my Player entity is now pretty useless as it doesnt have any non-navigation properties. So things seem to match what we are going for, great now what the heck do we do with this? Lets switch gears and see what we get for free dealing with this model from the UI. Lets open up the MainWindow.xaml and see if we can connect to our entities as a data source. Hey, whats this? Have you read my mind, Visual Studio? Our entities are already listed in the Data Sources panel: I do notice, however, that our Player entity is missing. Is this due to that compilation warning? Ill add a bogus property to our player entity just to see if that is the case no, still no love. The warning reads: Error 2062: No mapping specified for instances of the EntitySet and AssociationSet in the EntityContainer PlayerModelContainer. Well if everything worked without any issues, then I wouldnt be stumbling through at all, so lets get to the bottom of this. My good friend google indicates that the warning is due to the model not being tied up to a database. Hmmm, so why dont Players show up in my data sources? A little bit of drill-down shows that they are, in fact, exposed under Positions: Well now that isnt quite what I want. While you could get to players through a position, it shouldnt be that way exclusively. Oh well, I can ignore that for now lets drag Players out onto the canvas after selecting List from the dropdown: Hey, what the heck? I wanted a list not a listview. Get rid of that list view that was just dropped, drop in a listbox and then drop the Players entity into it. That will bind it for us. Of course, there isnt any data to show, which brings us to the really hacky part of all this and that is to stuff some test data into our view source without actually getting it from any data source. To do this through code, we need to grab a reference to the positionsPlayersViewSource resource that was created for us when we dragged out our Players entity. We then set the source of that reference equal to a populated list of Players.  Well add a couple of players that way as well as a few positions via the positionsViewSource resource, and Ill ensure that each player has a position specified.  Ultimately, the code looks like this: System.Windows.Data.CollectionViewSource positionViewSource = ((System.Windows.Data.CollectionViewSource)(this.FindResource("positionsViewSource")));             List<Position> positions = new List<Position>();             Position newPosition = new Position();             newPosition.Id = 0;             newPosition.Name = "WR";             positions.Add(newPosition);             newPosition = new Position();             newPosition.Id = 1;             newPosition.Name = "RB";             positions.Add(newPosition);             newPosition = new Position();             newPosition.Id = 2;             newPosition.Name = "QB";             positions.Add(newPosition);             positionViewSource.Source = positions;             System.Windows.Data.CollectionViewSource playerViewSource = ((System.Windows.Data.CollectionViewSource)(this.FindResource("positionsPlayersViewSource")));             List<Player> players = new List<Player>();             Player newPlayer = new Player();             newPlayer.Id = 0;             newPlayer.Name = "Test Dude";             newPlayer.Position = positions[0];             players.Add(newPlayer);             newPlayer = new Player();             newPlayer.Id = 1;             newPlayer.Name = "Test Dude II";             newPlayer.Position = positions[1];             players.Add(newPlayer);             newPlayer = new Player();             newPlayer.Id = 2;             newPlayer.Name = "Test Dude III";             newPlayer.Position = positions[2];             players.Add(newPlayer);             playerViewSource.Source = players; Now that our views are being loaded with data, we can go about tying things together visually. Drop a text box (to show the selected players name) and a combo box (to show the selected players position). Drag the Positions entity from the data sources panel to the combo box to wire it up to the positions view source. Click the text box that was dragged, and find its Text property in the properties pane. There is a little glyph next to it that displays Advanced Properties when hovered over click this and then select Apply Data Binding. In the dialog that appears, we can select the current players name as the value to bind to: Similarly, we can wire up the combo boxs SelectedItem value to the current players position: When the application is executed and we navigate through the various players, we automatically get their name and position bound to the appropriate fields: All of this was accomplished with no code save for loading the test data, and I might add, it was pretty intuitive to do so via the drag and drop of entities straight from the data sources panel. So maybe all of this was old hat to you, but I was very impressed with this experience and I look forward to stumbling through the caveats of doing more complex data modeling and binding in this fashion. Next up, I suppose, will be figuring out how to get the entities to get real data from a data source instead of stuffing it with test data as well as trying to figure out why Players ended up being under Positions in the data sources panel.Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Dentrix database file

  - by user1050116

  I have dentrix database files, but i don't know which database engine support it. I read online that it support c-Tree database engine, but i am fail to open any files/database into it. Database file are like test.dat and test.idx and many more files are there like this file extensions only. Please help me this, how can i open these files and database. Which database engine will support to open these files?

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• Can't change parameters of rpcss

  - by alexm

  dcdiag reports following problem on client computers: Starting test: Services Invalid service type: RpcSs on ********, current value WIN32_OWN_PROCESS, expected value WIN32_SHARE_PROCESS ......................... ******** failed test Services Tried to change type of service by command sc config rpcss type=share and from regedit by putting type=20(dec) instead of type=10(hex)- no luck...

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• Make Dell's OpenManage 6.2 information available through SNMP

  - by tronda

  I have successfully installed OpenManage on a CentOS 5.4 server and I'm able to use OpenManage through the web interface running on port 1311, but I would like to be able to expose this information through the SNMP server. I don't know SNMP particularly well so the configuration is a result of trial and error. I've tried to follow the description pointed out in the Open Manage Server Administrator User Guide. I've followed the documentation regarding SNMP configuration, but without success. I've created a small snmpd.conf file: com2sec notConfigUser default public group notConfigGroup v1 notConfigUser group notConfigGroup v2c notConfigUser view systemview included .1.3.6.1.2.1.1 view systemview included .1.3.6.1.2.1.25.1.1 access notConfigGroup "" any noauth exact all all none view all included .1 rwcommunity public 10.200.26.50 syslocation "Somewhere" syscontact [email protected] pass .1.3.6.1.4.1.4413.4.1 /usr/bin/ucd5820stat smuxpeer .1.3.6.1.4.1.674.10892.1 When I try to fetch SNMP information by using snmpwalk I get the following output: SNMPv2-MIB::sysDescr.0 = STRING: Linux myserver.test.com 2.6.18-164.15.1.el5 #1 SMP Wed Mar 17 11:30:06 EDT 2010 x86_64 SNMPv2-MIB::sysObjectID.0 = OID: NET-SNMP-MIB::netSnmpAgentOIDs.10 DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (1180389) 3:16:43.89 SNMPv2-MIB::sysContact.0 = STRING: [email protected] SNMPv2-MIB::sysName.0 = STRING: myserver.test.com SNMPv2-MIB::sysLocation.0 = STRING: "Somewhere" SNMPv2-MIB::sysORLastChange.0 = Timeticks: (0) 0:00:00.00 SNMPv2-MIB::sysORID.1 = OID: SNMPv2-MIB::snmpMIB SNMPv2-MIB::sysORID.2 = OID: TCP-MIB::tcpMIB SNMPv2-MIB::sysORID.3 = OID: IP-MIB::ip SNMPv2-MIB::sysORID.4 = OID: UDP-MIB::udpMIB SNMPv2-MIB::sysORID.5 = OID: SNMP-VIEW-BASED-ACM-MIB::vacmBasicGroup SNMPv2-MIB::sysORID.6 = OID: SNMP-FRAMEWORK-MIB::snmpFrameworkMIBCompliance SNMPv2-MIB::sysORID.7 = OID: SNMP-MPD-MIB::snmpMPDCompliance SNMPv2-MIB::sysORID.8 = OID: SNMP-USER-BASED-SM-MIB::usmMIBCompliance SNMPv2-MIB::sysORDescr.1 = STRING: The MIB module for SNMPv2 entities SNMPv2-MIB::sysORDescr.2 = STRING: The MIB module for managing TCP implementations SNMPv2-MIB::sysORDescr.3 = STRING: The MIB module for managing IP and ICMP implementations SNMPv2-MIB::sysORDescr.4 = STRING: The MIB module for managing UDP implementations SNMPv2-MIB::sysORDescr.5 = STRING: View-based Access Control Model for SNMP. SNMPv2-MIB::sysORDescr.6 = STRING: The SNMP Management Architecture MIB. SNMPv2-MIB::sysORDescr.7 = STRING: The MIB for Message Processing and Dispatching. SNMPv2-MIB::sysORDescr.8 = STRING: The management information definitions for the SNMP User-based Security Model. SNMPv2-MIB::sysORUpTime.1 = Timeticks: (0) 0:00:00.00 SNMPv2-MIB::sysORUpTime.2 = Timeticks: (0) 0:00:00.00 SNMPv2-MIB::sysORUpTime.3 = Timeticks: (0) 0:00:00.00 SNMPv2-MIB::sysORUpTime.4 = Timeticks: (0) 0:00:00.00 SNMPv2-MIB::sysORUpTime.5 = Timeticks: (0) 0:00:00.00 SNMPv2-MIB::sysORUpTime.6 = Timeticks: (0) 0:00:00.00 SNMPv2-MIB::sysORUpTime.7 = Timeticks: (0) 0:00:00.00 SNMPv2-MIB::sysORUpTime.8 = Timeticks: (0) 0:00:00.00 I suspect that I should get some DELL specific information when I use the snmpwalk utility. Is there a configuration in snmpd.conf file which is wrong, or do I have to configure on the OpenManage side in order to get the hardware information accessible from SNMP?

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• What is the equivalent of Cisco's 'ip virtual-reassembly' for a Juniper ISG 2000

  - by 2xyo

  I tested my dns servers with the oarc test and my size limit is at least 1403 bytes. I performed the same test before my Juniper ISG 2000 and the result is 2047 bytes. According to the chapter IP "Fragments Filtered" and this article, I think I have a fragmentation problem. This article talks about ip virtual-reassembly for cisco but I can't find the equivalent for Juniper. I prefer to find the good option in JunOS before I talk about this with my net admin :-) Thanks

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• Should Windows Multipoint Server stations on individual video cards support hardware video acceleration?

  - by villares

  I've set up a test machine with multiple PCI-e nVidia GF440 Video cards and installed Windows Multipoint Server 2011. I use the same kind of hardware set up with a BeTwin multiseat solution to create a class lab for Google SketchUp teaching (highly OpenGL dependent) and it works ok. On the Multipoint Windows test machine the drivers seem to be installed OK but I don´t seem to get any hardware video acceleration. Is this a intrinsic limitation of this solution or am I doing something wrong?

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• PHP 5.3.2 + Fcgid 2.3.5 + Apache 2.2.14 + SuExec => Connection reset by peer: mod_fcgid: error reading data from FastCGI server

  - by Zigzag

  I'm trying to use PHP 5.3.2 + Fcgid 2.3.5 + Apache 2.2.14 but I always have the error : "Connection reset by peer: mod_fcgid: error reading data from FastCGI server". And Apache returns an error 500 each time I tried to execute a php page : I have compiled the Apache with this options: ./configure --with-mpm=worker --enable-userdir=shared --enable-actions=shared --enable-alias=shared --enable-auth=shared --enable-so --enable-deflate \ --enable-cache=shared --enable-disk-cache=shared --enable-info=shared --enable-rewrite=shared \ --enable-suexec=shared --with-suexec-caller=www-data --with-suexec-userdir=site --with-suexec-logfile=/usr/local/apache2/logs/suexec.log --with-suexec-docroot=/home Then PHP: ./configure --with-config-file-path=/usr/local/apache2/php --with-apxs2=/usr/local/apache2/bin/apxs --with-mysql --with-zlib --enable-exif --with-gd --enable-cgi Then FCdigd: APXS=/usr/local/apache2/bin/apxs ./configure.apxs The VHOST is: <Directory /home/website_panel/site/> FCGIWrapper /home/website_panel/cgi/php .php ... ErrorLog /home/website_panel/logs/error.log </Directory> cat /home/website_panel/logs/error.log [Sun Mar 07 22:19:41 2010] [warn] [client xx.xx.xx.xx] (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server [Sun Mar 07 22:19:41 2010] [error] [client xx.xx.xx.xx] Premature end of script headers: test.php [Sun Mar 07 22:19:41 2010] [warn] [client xx.xx.xx.xx] (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server [Sun Mar 07 22:19:41 2010] [error] [client xx.xx.xx.xx] Premature end of script headers: test.php [Sun Mar 07 22:19:42 2010] [warn] [client xx.xx.xx.xx] (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server [Sun Mar 07 22:19:42 2010] [error] [client xx.xx.xx.xx] Premature end of script headers: test.php [Sun Mar 07 22:19:43 2010] [warn] [client xx.xx.xx.xx] (104)Connection reset by peer: mod_fcgid: error reading data from FastCGI server [Sun Mar 07 22:19:43 2010] [error] [client xx.xx.xx.xx] Premature end of script headers: test.php The Suexec log: root:/usr/local/apache2# cat /var/log/apache2/suexec.log [2010-03-07 22:11:05]: uid: (1001/website_panel) gid: (1001/website_panel) cmd: php [2010-03-07 22:11:15]: uid: (1001/website_panel) gid: (1001/website_panel) cmd: php [2010-03-07 22:11:23]: uid: (1001/website_panel) gid: (1001/website_panel) cmd: php [2010-03-07 22:19:41]: uid: (1001/website_panel) gid: (1001/website_panel) cmd: php [2010-03-07 22:19:41]: uid: (1001/website_panel) gid: (1001/website_panel) cmd: php [2010-03-07 22:19:42]: uid: (1001/website_panel) gid: (1001/website_panel) cmd: php [2010-03-07 22:19:43]: uid: (1001/website_panel) gid: (1001/website_panel) cmd: php root:/usr/local/apache2# cat logs/error_log [Sun Mar 07 22:18:47 2010] [notice] suEXEC mechanism enabled (wrapper: /usr/local/apache2/bin/suexec) [Sun Mar 07 22:18:47 2010] [notice] mod_bw : Memory Allocated 0 bytes (each conf takes 32 bytes) [Sun Mar 07 22:18:47 2010] [notice] mod_bw : Version 0.7 - Initialized [0 Confs] [Sun Mar 07 22:18:47 2010] [notice] Apache/2.2.14 (Unix) mod_fcgid/2.3.5 configured -- resuming normal operations root:/usr/local/apache2# /home/website_panel/cgi/php -v PHP 5.3.2 (cli) (built: Mar 7 2010 16:01:49) Copyright (c) 1997-2010 The PHP Group Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies If someone has got an idea, I want to hear it ^^ Thanks !

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• Why does jmeter not work?

  - by Foolish

  I use jmeter to record requests and then perform a performance test after it records all the requests with proxy server. These requests contain a post form. After that I run the test cases, but I found the post form doesn't work -- it cannot create a record in the website's database automatically. But before that I used Webload and everything was OK. What's the problem? What can I do for this?

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• Good IE6,IE7 simulator applications?

  - by snitzr

  I have IE8 installed, I would like to test websites in IE6 and IE7. I cannot use Adobe's BrowserLab to test because the website needing tests contains dynamic content. I cannot find a good application to simulate IE6 or 7. Is one available/recommended? Or can I install and run IE6 through 8 on my machine at the same time?

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• ScriptResource.axd throws 404 server error

  - by Gayathiri

  Hi, Iam running the application locally, performing the WebTest(UI)..I record the test, and stop recording, the test is running in the visual studio, It thorws error telling "ScriptResource.axd throws 404 server error" Excetly the error was Server '/' application not found.The scriptResource.axd not found. Can anybody help me in resolving this problem. Regards, Gayathiri Venkatraman.

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• Can you run Snow Leopard Server on a VM?

  - by Crash893

  I'm thinking of buying a mac mini server for my email needs (small office server for 999 with all the features i want build in) I wanted to give it a test drive before i commit so i was thinking "hey this sounds like the perfect job for a vm" however i havent been able to see any examples of running snow lepoard server on a vm does anyone know if its possible and/or there is a premade vm package to test it out with?

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• Question about network topology and routing performance

  - by algorithms

  Hello I am currently working on a uni project about routing protocols and network performance, one of the criteria i was going to test under was to see what effect lan topology has, ie workstations arranged in mesh, star, ring etc, but i am having doubts as to whether that would have any affect on the routing performance thus would be useless to do, rather i'm thinking it would be better to test under the topology of the routers themselves, ie routers arranged in either star, mesh ring etc. I would appreciate some feedback on this as I am rather confused. Thank You

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• JNDI Datasource Problem on Tomcat 6, Hibernate

  - by Asuman AKYILDIZ

  I am using Tomcat 6 as application server, Struts-Hibernate and MyEclipse 6.0. My application uses JDBC driver but I should modify it to use JNDI Datasource. I followed steps as described in tomcat 6.0 howto tutorial. I defined my resource in tomcatconf: <Resource name="jdbc/ats" global="jdbc/ats" auth="Container" type="javax.sql.DataSource" driverClassName="oracle.jdbc.OracleDriver" url="jdbc:oracle:thin:@//localhost:1521/MISDEV" username="TEST" password="TEST" maxActive="20" maxIdle="10" maxWait="-1" validationQuery="SELECT 1 from dual" removeAbandoned="true" removeAbandonedTimeout="30" logAbandoned="false"/> I gave reference in my application web.xml: <resource-ref> <description>Oracle Datasource example</description> <res-ref-name>jdbc/ats</res-ref-name> <res-type>javax.sql.DataSource</res-type> <res-auth>Container</res-auth> </resource-ref> And I defined datasource-dialect in my hibernate-cfg.xml <property name="connection.datasource">java:comp/env/jdbc/ats</property> <property name="dialect">org.hibernate.dialect.Oracle9Dialect</property> But when I create hibernate session, it can not open the connection: 09:18:11,322 ERROR JDBCExceptionReporter:72 - Connections could not be acquired from the underlying database! org.hibernate.exception.GenericJDBCException: Cannot open connection I also tried to set the properties at runtime: Configuration configuration = new Configuration(); configuration.setProperty("hibernate.dialect", "org.hibernate.dialect.Oracle9Dialect"); //configuration.setProperty("hibernate.connection.datasource", "java:comp/env/jdbc/ats"); configuration.setProperty("hibernate.current_session_context_class", "thread"); configuration.setProperty("hibernate.connection.provider_class", "org.hibernate.connection.C3P0ConnectionProvider"); configuration.setProperty("hibernate.show_sql", "true"); sessionFactory = configuration.configure().buildSessionFactory(); It does not open connection again. But, when I use JDBC driver it works: Configuration configuration = new Configuration(); configuration.setProperty("hibernate.dialect", "org.hibernate.dialect.Oracle9Dialect"); //configuration.setProperty("hibernate.connection.datasource", "java:comp/env/jdbc/ats"); configuration.setProperty("hibernate.connection.url", "jdbc:oracle:thin:@//localhost:1521/MISDEV"); configuration.setProperty("hibernate.connection.username", "test"); configuration.setProperty("hibernate.connection.password", "test"); configuration.setProperty("hibernate.connection.driver_class", "oracle.jdbc.OracleDriver"); configuration.setProperty("hibernate.transaction.factory_class", "org.hibernate.transaction.JDBCTransactionFactory"); configuration.setProperty("hibernate.current_session_context_class", "thread"); configuration.setProperty("hibernate.connection.provider_class", "org.hibernate.connection.C3P0ConnectionProvider"); configuration.setProperty("hibernate.show_sql", "true"); sessionFactory = configuration.configure().buildSessionFactory(); I have been searching for 3 days and no success. What may be de problem?

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• setting up a basic mod_proxy virtual host

  - by SevenProxies

  I'm trying to set up a basic virtual host to proxy all requests to test.local to a WEBrick server I have running on 127.0.0.1:8080 while keeping all requests to localhost going to my static files in /var/www. I'm running Ubuntu 10.04. I have libapache2-mod-proxy-html installed and I have the module enabled with a2enmod proxy. I also have my virtual host enabled. However, whenever I go to test.local I always get a cryptic 500 server error and all my logs are telling me is: [Thu Mar 03 01:43:10 2011] [warn] proxy: No protocol handler was valid for the URL /. If you are using a DSO version of mod_proxy, make sure the proxy submodules are included in the configuration using LoadModule. Here's my virtual host: <VirtualHost test.local:80> LoadModule proxy_module /usr/lib/apache2/modules/mod_proxy.so ServerAdmin webmaster@localhost ServerName test.local ProxyPreserveHost On # prevents this folder from being proxied ProxyPass /static ! DocumentRoot /var/www <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> <Proxy *> Order allow,deny Allow from all </Proxy> ProxyPass / http://localhost:8080/ ProxyPassReverse / http://localhost:8080/ ErrorLog /var/log/apache2/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/access.log combined and here's my settings for mod_proxy: <IfModule mod_proxy.c> #turning ProxyRequests on and allowing proxying from all may allow #spammers to use your proxy to send email. ProxyRequests Off <Proxy *> # default settings #AddDefaultCharset off #Order deny,allow #Deny from all ##Allow from .example.com AddDefaultCharset off Order allow,deny Allow from all </Proxy> # Enable/disable the handling of HTTP/1.1 "Via:" headers. # ("Full" adds the server version; "Block" removes all outgoing Via: headers) # Set to one of: Off | On | Full | Block ProxyVia On </IfModule> Does anybody know what I'm doing wrong? Thanks

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