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• How do developer get rid of silly requirements?

  - by sugar

  Hmm ! First of all let me give you the note of the requirement. So that you can have idea what kind of problem I am facing. Words From Project Manager : Hey ! Sugar, I am assigning you a task for developing a framework. This framework is supposed to be developed for all iOS application. Please go through brief of the required framework. It should be able to detect the thickness of my Thumb. It should be able to detect whether User is using thumb or Fingers If user is using thumbs/Fingers, Framework should calculate the size of thumb/fingers. Once size is been calculated, all elements of user interface should arranged & resized automatically. ( not specified how & where as its framework - it should be smart enough to arrange automatically ) If thumb size is larger elements should get arranged near by center area of iPad/iPhone If thumb size is smaller elements should get arranged near by corners of iPad/iPhone If thumb size is larger, fonts of all elements should get smaller. ( assuming = aged person ) If thumb size is smaller, fonts of all elements should get larger. ( assuming smaller thumb = low aged person ) Summary : This framework is required for creating user-friendly user-interfaces programmatically. We need to develop a very developer-friendly framework. Framework should be developed in such a way that we can use in as many projects as needed. Well, I am a developer. What I want to have as an answer is as follows. How to describe them - the way of they thinking is bit ridiculous ? How do I explain them - we can better concentrate on developing actual projects ? How do I convince them - that this kind of things even if possible, is not recommended to develop such things ? How do I say politely, gently & respectfully NO to this ? What should I say, So that they can not point at my experience ? ( e.g. you are 3 years experienced guy & you must have abilities to develop such things ) Feeling horror. Please help. Thanks in advance, Sugar. Note : Please help me to tag this question properly. I am stuck & this is real situation. Frustrated & tensed. You guys might have faced such requirements from TopLevel. requesting you to help with your experience. Well ! I came to know that - those TOPLEVEL guys don't have any idea of iPad, iPhone, Apple etc. I would do one thing. Sir, before we go further for framework development. It is strongly recommended to read Apple Human Interface Guidlines.

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• SQLAuthority News – Stay Connected and Social Media

  - by pinaldave

  I think I have finally gotten back my faith in social media. If you are following my blog I am sure you are aware of my views on social media – SQLAuthority News – Social Media Confusion – Twitter, FaceBook, LinkedIn and Me. I was not happy about how social media was evolving. Whenever I go to Twitter, LinkedIn or Facebook, I noticed the same updates everywhere. I just thought I was wasting my time doing the same thing everywhere. I strongly believe that there is no dictator on internet. Nobody has authority over others, everybody can express their ideas as long as it is not violating others privacy and it is not morally wrong. I have decided that instead of trying to improve the world, I should change myself and adjust my needs. Here are few things I have done to relieve my social media confusion. Twitter I un-followed people who were taking up my time with too many updates. I un-followed people who hardly updated at all. I did not follow anybody else’s list, as I have no control over who other people follow. I follow not only serious SQL people but some fun stuff as well. I removed all my friends who were on Facebook and repeating the same updates on Twitter. I engage with them on Facebook. I followed people who are very conversational on Twitter. I let anybody follow me. I update all my blog posts through at least five tweets online. I decided to re-tweet at least five of my favorite tweets of the day, this way I force myself to remain active in the community. Follow me on Twitter! LinkedIn I updated my career and professional info on LinkedIn. I keep my LinkedIn profile updated with my latest jobs and career news. I let anybody connect with me on LinkedIn. I specify my email address in my profile, keeping it easy for those who want to add me. I read all the profile related updates of my connections – it is very valuable to know who is where and what changes are happening. I do not add my personal tweets or comments in LinkedIn profile. I just keep it professional. Link with me at LinkedIn Facebook I use Facebook only for personal friends. I visit all of my friends at regular intervals and make sure that they are really my friends. I often remove my friends from my Twitter list who are sending duplicate updates. I upload my family photos as well as family updates on Facebook, making sure that only my approved friends are able to read my updates. I keep my Facebook very personal and I often chat with my friends on Facebook chat. I am no longer confused about social media and I think I am using it appropriately. As I said, one cannot decide for others how to use social media, you can only decide for yourself. I have finally found my peace with social media. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: About Me, Pinal Dave, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• subdomain .htaccess redirection via ssh remote port forwarding

  - by Achim

  I ask you to help me URL redirecting a subdomain to a SSH remote forwarded port: The current setup is the following: The server A have a local webserver running on port 80. This server is connected to a DSL line or a GPRS connection where the IP address changes often. To prevent a DynDNS setup we established a SSH remote port forwarding to a server B with a static IP adress. This is done on server A by the following statement: ssh -N -p 80 -g -R 10000:localhost:80 tunneling@<Server B IP> So by accessing the new port 10000 of the servers B IP-adress, all traffic is forwarded to the server A port 80 - this works fine! But to offer a more comfortable url to the user I want to hide the server B IP-adress and offer a subdomain. My domain provider allows to add subdomains and redirections to some other servers. In general, this works, I've tested this with different servers. But it don't work if the destination is the port forwarded port of server B. The initial redirection is done, the request is send to server A and the response are forwarded to server B and shown in the browser - fine. But then the URL within the browser is switched away from the subdomain to the IP:port of server B. So the user don't see the subdomain in the URL string of the browser anymore. I've tried this with my providers subdomain redirection, as well as .htaccess redirect, as well as META refresh, the problem always persist. Is there a parameter in the ssh reverse forwarding setup (I guess this is the place where the fix have to be) to keep the typed in subdomain URL and not show the IP. Thanks Achim

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• Windows XP error message: "Windows cannot find 'explorer.exe'"

  - by Meysam

  In Windows XP I can open "My Computer" and see all the hard drives. I can also see the explorer.exe process running among other processes in Task Manager. But after opening "My Computer", when I double click on one of the drives to open it, I get the following error message: Windows cannot find 'explorer.exe'. Make sure you typed the name correctly, and then try again. To search for a file, click the start button, and then click search. Although I could detect and remove several suspicious files using Malwarebytes & Microsoft Security Essentials, the problem still remains. The interesting point is that if I right click on one folder and select Open or Explore from the menu bar, I can open the folder! but if I double click on the folder, it does not open and I get the above error message. How can I fix this problem? Any advice would be appreciated! Update: I formatted the C: drive (NTFS), a deep format, and installed a fresh Windows XP on it. I am not getting this error when I double click on C drive icon anymore. But the same error appears when I double click on other drive names. Maybe I should format them too!

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• Installing Ruby 1.9.3 OSX 10.7.4 breaks after altering PATH

  - by R V

  I was having trouble installing ruby 1.9.3-p194 from ruby 1.8.7 on my mac osx 10.7.4. I have was trying to fix my homebrew after running "brew doctor" and got the message of "/usr/bin occurs before /usr/local/bin This means that system-provided programs will be used instead of those provided by Homebrew. The following tools exist at both paths: c++-4.2 cpp-4.2 erb g++-4.2 gcc-4.2 gcov-4.2 gem i686-apple-darwin11-cpp-4.2.1 i686-apple-darwin11-g++-4.2.1 i686-apple-darwin11-gcc-4.2.1 irb rake rdoc ri ruby testrb" I fixed it by entering the following, which I found on another stackoverflow answer: export PATH="/usr/local/bin:/usr/local/sbin:~/bin$PATH" Lo and behold! when I typed that ruby updates to 1.9.3-p194. Ruby files seem to compile and run just fine. However, afterward, my navigation around terminal is messed up severely. For instance I can't do the command "open example_file.html" and have the file pop up in Chrome, instead I get the error: "-bash: open: command not found" Also, when I change directory, I get an error, inputting "$ cd desktop" yields the output, "-bash: dirname: command not found" but the directory does then changes... strange. When I exit out of a terminal window all this resets. I'm back to Ruby 1.8.7, have to use the PATH command again to update to 1.9.3, command line navigation gets broken again. Any guidance on how to remedy so I can use 1.9.3-p194 and also have normal terminal navigation would be greatly appreciated.

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• Can't make nodejs mingw32: pkg-config can't find gnutils

  - by valya

  I'm trying to compile nodejs using MSYS, mingw32 on Windows 7-64 Valentin Golev@VALYASNOTEBOOK /home/Valentin_Golev/nodejs $ ./configure Checking for program CL : ok C:\Program Files (x86)\Microsoft V isual Studio 10.0\VC\BIN\x86_amd64\CL.exe Checking for program CL : ok C:\Program Files (x86)\Microsoft V isual Studio 10.0\VC\BIN\CL.exe Checking for program CL : ok C:\Program Files (x86)\Microsoft V isual Studio 10.0\VC\BIN\amd64\CL.exe Checking for program CL : ok c:\Program Files (x86)\Microsoft V isual Studio 9.0\VC\BIN\CL.exe Checking for program CL : ok c:\Program Files (x86)\Microsoft V isual Studio 9.0\VC\BIN\CL.exe Checking for program CL : ok c:\Program Files (x86)\Microsoft V isual Studio 9.0\VC\BIN\x86_amd64\CL.exe Checking for program CL : ok c:\Program Files (x86)\Microsoft V isual Studio 9.0\VC\BIN\CL.exe Checking for program CL : ok c:\Program Files (x86)\Microsoft V isual Studio 9.0\VC\BIN\amd64\CL.exe Checking for program CL : ok c:\Program Files (x86)\Microsoft V isual Studio 9.0\VC\BIN\amd64\CL.exe Checking for program LINK : ok c:\Program Files (x86)\Microsoft V isual Studio 9.0\VC\BIN\amd64\LINK.exe Checking for program LIB : ok c:\Program Files (x86)\Microsoft V isual Studio 9.0\VC\BIN\amd64\LIB.exe Checking for program MT : ok C:\Program Files\\Microsoft SDKs\W indows\v6.0A\bin\x64\MT.exe Checking for program RC : ok C:\Program Files\\Microsoft SDKs\W indows\v6.0A\bin\x64\RC.exe Checking for msvc : ok Checking for msvc : ok Checking for library dl : not found Checking for library execinfo : not found Checking for gnutls >= 2.5.0 : fail --- libeio --- Checking for library pthread : not found Checking for function pthread_create : not found error: the configuration failed (see 'C:\\msys\\1.0\\home\\Valentin_Golev\\node js\\build\\config.log') I have gnutils built and installed! I've checked the config.log, and there was a command: pkg-config --errors-to-stdout --print-errors --atleast-version=2.5.0 gnutls I typed it in the console Valentin Golev@VALYASNOTEBOOK /home/Valentin_Golev/nodejs $ pkg-config --errors-to-stdout --print-errors --atleast-version=2.5.0 gnutls Package gnutls was not found in the pkg-config search path. Perhaps you should add the directory containing `gnutls.pc' to the PKG_CONFIG_PATH environment variable No package 'gnutls' found But, Valentin Golev@VALYASNOTEBOOK ~ $ $PKG_CONFIG_PATH sh: c:/msys/1.0/local/lib/pkgconfig: is a directory Valentin Golev@VALYASNOTEBOOK ~ $ cd $PKG_CONFIG_PATH Valentin Golev@VALYASNOTEBOOK /local/lib/pkgconfig $ ls gnutls-extra.pc gnutls.pc What am I doing wrong?

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• Exalytics and Oracle Business Intelligence Enterprise Edition (OBIEE) Partner Workshop

  - by mseika

  Workshop Description Oracle Fusion Middleware 11g is the #1 application infrastructure foundation. It enables enterprises to create and run agile and intelligent business applications and maximize IT efficiency by exploiting modern hardware and software architectures. Oracle Exalytics Business Intelligence Machine is the world’s first engineered system specifically designed to deliver high performance analysis, modeling and planning. Built using industry-standard hardware, market-leading business intelligence software and in-memory database technology, Oracle Exalytics is an optimized system that delivers unmatched speed, visualizations and scalability for Business Intelligence and Enterprise Performance Management applications. This FREE hands-on, partner workshop highlights both the hardware and software components that are engineered to work together to deliver Oracle Exalytics - an optimized version of the industry-leading Oracle TimesTen In-Memory Database with analytic extensions, a highly scalable Oracle server designed specifically for in-memory business intelligence, and Oracle’s proven Business Intelligence Foundation with enhanced visualization capabilities and performance optimizations. This workshop will provide hands-on experience with Oracle's latest engineered system. Topics covered will include TimesTen In-Memory Database and the new Summary Advisor for Exalytics, the technical details (including mobile features) of the latest release of visualization enhancements for OBI-EE, and technical updates on Essbase. After taking this course, you will be well prepared to architect, build, demo, and implement an end-to-end Exalytics solution. You will also be able to extend your current analytical and enterprise performance management application implementations with numerous Oracle technologies specifically enhanced to take advantage of the compute capacity and in-memory capabilities of Oracle Exalytics.If you are a BI or Data Warehouse Architect, developer or consultant, you don’t want to miss this 3-day workshop. Register Now! Presentations Exalytics Architectural Overview Upgrade and Lifecycle Management Times Ten for Exalytics Summary Advisor Utility Essbase and EPM System on Exalytics Dashboard and Analysis Interactions OBIEE 11.1.1.6 Features and Advanced Topics Lab OutlineThe labs showcase Oracle Exalytics core components and functionality and provide expertise of Oracle Business Intelligence 11.1.1.6 new features and updates from prior releases. The hands-on activities are based on an Oracle VirtualBox image with software and training samples pre-installed. Lab Environment Setup Creating and Working with Oracle TimesTen In-Memory Database Running Summary Advisor Utility Working with Exalytics Visualization Features – Dashboard and Analysis Interactions Audience Oracle Partners BI and EPM Application Developers and Implementers System Integrators and Solution Consultants Data Warehouse Developers Enterprise Architects Prerequisites Experience and understanding of OBIEE 11g is required Previous attendance of Oracle Business Intelligence Foundation Suite Workshop or BIEE 11gIntroduction Workshop is highly recommended Good understanding of data warehousing and data modeling for reporting and analysis purpose Strong experience with database technologies preferred Equipment RequirementsThis workshop requires attendees to provide their own laptops for this class.Attendee laptops must meet the following minimum hardware/software requirements: Hardware Minimum 8GB RAM 60 GB free space (includes staging) USB 2.0 port (at least one available) It is strongly recommended that you bring a mouse. You will be working in a development environment and using the mouse heavily. Software One of the following operating systems: 64-bit Windows host/laptop OS 64-bit host/laptop OS with a Windows VM (XP, Server, or Win 7, BIC2g, etc.) Internet Explorer 7.x/8.x or Firefox 3.5.x WINRAR or 7ziputility to unzip workshop files: Download-able from http://www.win-rar.com/download.html Download-able from http://www.7zip.com/ Oracle VirtualBox 4.0.2 or higher Downloadable from http://www.virtualbox.org/wiki/Downloads CPU virtualization mode needs to be enabled. We will provide guidance on the day of the workshop. Attendees will be given a VirtualBox image containing a pre-installed Oracle Exalytics environment. Schedule This workshop is 3 days. - Times vary by country!9:00am: Sign-in and technical setup 9:30am: Workshop starts 5:00pm: Workshop ends Oracle Exalytics and Business Intelligence (OBIEE) Workshop December 11-13, 2012: Oracle BVP, Birmingham, UK Register Here. Questions? Send email to: [email protected] Oracle Platform Technologies Enablement Services

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• ssh connection operation timed out using rsync

  - by Mark Molina

  I use rsync to backup my remote server on my local device but when I combine it with a cron job my ssh times out. Just to be clear, the data is stored on a remote server and I want it stored on my local server. The backup request must be sent from my local server to the remote server. The command for backup up the data is working when I just type it in terminal like this: rsync -chavzP --stats USERNAME@IPADDRES: PATH_TO_BACKUP LOCAL_PATH_TO_BACKUP but when I combine it with a cron job like this: 10 11 * * * rsync -chavzP --stats USERNAME@IP_ADDRESS: PATH_TO_BACKUP LOCAL_PATH_TO_BACKUP the ssh connection times out. When the cronjob executes it send a mail to the root user with the output like this: From local.xx.xx.xx Tue Jul 2 11:20:17 2013 X-Original-To: username Delivered-To: [email protected] From: [email protected] (Cron Daemon) To: [email protected] Subject: Cron <username@server> rsync -chavzP --stats USERNAME@IPADDRES: PATH_TO_BACKUP LOCAL_PATH_TO_BACKUP X-Cron-Env: <SHELL=/bin/sh> X-Cron-Env: <PATH=/usr/bin:/bin> X-Cron-Env: <LOGNAME=username> X-Cron-Env: <USER=username> X-Cron-Env: <HOME=/Users/username> Date: Tue, 2 Jul 2013 11:20:17 +0200 (CEST) ssh: connect to host IP_ADDRESS port XX: Operation timed out rsync: connection unexpectedly closed (0 bytes received so far) [receiver] rsync error: unexplained error (code 255) at /SourceCache/rsync/rsync-42/rsync/io.c(452) [receiver=2.6.9] So the rsync command is working when just typed in terminal but not when used by a cronjob. Can anybody explain this?

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• Using GUI ftp on Win7 and Vista without additional software

  - by Stephen Jones

  Goal: provide a 'no-software' method for 'less technical' users to access password protect ftp location from Win7 and Vista (existing approach for WinXP works). 'No software' method to mean without installing additional software (e.g. FileZilla, WinSCP) - the solution is supplied to external non-technical users. WinXP (works): Using Windows Explorer, WinXP supports non-technical ftp access by pasting: ftp://username:[email protected] into the address bar. The remote ftp site's files / directory structure becomes available and can be copied to / from easily (in the style of local file copy / paste) by a 'less technical' user. Win7 / Vista (doesn't work): Pasting the same URL into the Windows Explorer on Win7 or Vista causes an error: An error occurred opening that folder on the FTP server. Make sure you have permission to access that folder. Details: The connection with the server was reset. Notes: a) The same username/password/server typed from the (DOS) command line achieves access to the server, but this is a more 'technical' solution than desired. I am looking for a WinXP equivalent solution. b) Under 'Control Panel' / 'Internet options' / 'Advanced' tab - the boxes for 'Enable FTP folder view' and 'Use Passive FTP' are ticked (enabled) c) Adding an inbound firewall rule for local port 20 (TCP) was attempted with no difference in results (i.e. failure)

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• Is Cloud Security Holding Back Social SaaS?

  - by Mike Stiles

  The true promise of social data co-mingling with enterprise data to influence and inform social marketing (all marketing really) lives in cloud computing. The cloud brings processing power, services, speed and cost savings the likes of which few organizations could ever put into action on their own. So why wouldn’t anyone jump into SaaS (Software as a Service) with both feet? Cloud security. Being concerned about security is proper and healthy. That just means you’re a responsible operator. Whether it’s protecting your customers’ data or trying to stay off the radar of regulatory agencies, you have plenty of reasons to make sure you’re as protected from hacking, theft and loss as you can possibly be. But you also have plenty of reasons to not let security concerns freeze you in your tracks, preventing you from innovating, moving the socially-enabled enterprise forward, and keeping up with competitors who may not be as skittish regarding SaaS technology adoption. Over half of organizations are transferring sensitive or confidential data to the cloud, an increase of 10% over last year. With the roles and responsibilities of CMO’s, CIO’s and other C’s changing, the first thing you should probably determine is who should take point on analyzing cloud software options, providers, and policies. An oft-quoted Ponemon Institute study found 36% of businesses don’t have a cloud security policy at all. So that’s as good a place to start as any. What applications and data are you comfortable housing in the cloud? Do you have a classification system for data that clearly spells out where data types can go and how they can be used? Who, both internally and at the cloud provider, will function as admins? What are the different levels of admin clearance? Will your security policies and procedures sync up with those of your cloud provider? The key is verifiable trust. Trust in cloud security is actually going up. 1/3 of organizations polled say it’s the cloud provider who should be responsible for data protection. And when you look specifically at SaaS providers, that expectation goes up to 60%. 57% “strongly agree” or “agree” there’s more confidence in cloud providers’ ability to protect data. In fact, some businesses bypass the “verifiable” part of verifiable trust. Just over half have no idea what their cloud provider does to protect data. And yet, according to the “Private Cloud Vision vs. Reality” InformationWeek Report, 82% of organizations say security/data privacy are one of the main reasons they’re still holding the public cloud at arm’s length. That’s going to be a tough position to maintain, because just as social is rapidly changing the face of marketing, big data is rapidly changing the face of enterprise IT. Netflix, who’s particularly big on the benefits of the cloud, says, "We're systematically disassembling the corporate IT components." An enterprise can never realize the full power of big data, nor get the full potential value out of it, if it’s unwilling to enable the integrations and dataset connections necessary in the cloud. Because integration is called for to reduce fragmentation, a standardized platform makes a lot of sense. With multiple components crafted to work together, you’re maximizing scalability, optimization, cost effectiveness, and yes security and identity management benefits. You can see how the incentive is there for cloud companies to develop and add ever-improving security features, making cloud computing an eventual far safer bet than traditional IT. @mikestilesPhoto: stock.xchng

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• AD domain on web servers behind NAT - DNS issues?

  - by Ant

  I'm trying to setup an AD domain to manage the security between two Windows Server 2008 webservers that will sooner or later use NLB to balance website requests. I've hit a problem which I think is a simple solution and is down to DNS. My website domain is mydomain.com. The two servers are running behind a NAT firewall on the 10.0.0.0 IP range. I've setup the AD domain to be called ad.mydomain.com (as recommended by MS and a few other answers to questions on here). The second web server however doesn't want to join the domain, and gives an error pinning the problem on DNS - "ensure that the domain name is typed correctly" even though it queries the SRV record successfully and gets the correct DC back - dc.ad.mydomain.com. Doing a dcdiag /test:dns on the DC gives the Delegation error 'DNS Server dc.mydomain.com Missing glue A record'. I have a feeling I need to add something to the public DNS so that it in some way knows about ad.mydomain.com. Can anyone suggest whether I'm on the right track in adding something to the public DNS? Or whether it's something else? Many thanks

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• Cannot open files in Visual Studio but in Delphi and Notepad

  - by Andrew J. Brehm

  About an hour ago Visual Studio 2008 decided that it cannot find files any more. This is on 64 bit Windows Vista. When I right-click on a text file (source code or otherwise) and select "open with" and "Visual Studio 2008", I get the following error (example): Windows cannot find 'C:\Users\ajbrehm\Documents\Visual Studio 2008\Projects\Hello Prism\Hello Prism\Main.pas'. Make sure you typed the name correctly, and then try again. When I right-click the same file and select "open with" and "Delphi 2010" or "Notepad" (both other options available for text files on my system), the file opens correctly. Oddly enough when the file is part of a Visual Studio project and I open the project itself with Visual Studio (this works), I can open the file from within Visual Studio. Any ideas what might be going on? This started about an hour after I made a complete backup of my Vista VM and after I installed IIS 7, SQL Express, and Sourcegear Vault. The first files I noticed couldn't be opened in Visual Studio any more where Pascal source files in checked-outed folders from Vault. And Vault also seems to be unable to see one of the sources files and claims they don't exist. I found out about Visual Studio not opening ANY files any more when I tried to recreate the file Vault refused to see. Update: I just checked. Another user, "administrator", can still open text files with Visual Studio 2008. Both users have administrator rights. Update: I just restored the hours-old backup. Same problem. Apparently whatever triggered this happened before the install of IIS 7 and SQL Express. Never noticed it before.

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• SSD seems dead after wakeup from Windows Sleep, BIOS stalls but doesn't find it anymore

  - by Abel

  The morning, the following scary scenario happened: I woke up my Windows system Typed in my username and got an error (something like "could not load security xxx", but unsure of exact wording) System auto-restarted after cliking OK It didn't boot up anymore to the SSD with Windows 7 OS (I have another disk I can boot to, but that doesn't see the disk either). Obviously, this happened right after I instantiated a backup procedure, which hasn't succeeded either. The BIOS can't find the drive when I connect to SATA. And it can't find the drive when I connect it to SAS. I have a Dell Workstation T7400, most recent BIOS (version A06), version of SAS Host Bus Adapter BIOS (HBA) is MPTBIOS 6.14.10.00 (2007.09.29) from LSI Logic Corp. Other findings: When connecting to SATA, the DELL Logo screen stays really long (5 minutes) and then at the end of POST it says that a drive is not found When connecting to SAS, the SAS HBA initializing phase takes long (2 minutes, against normally 15 seconds) When running Dell Diagnostics, it doesn't finish and gives the error Exception occurred in module MPCACHE.MDM file "IOAPICSP.ASM" line 1645. I contacted Dell. On their advice I tried different slots and different cables to no avail. I use an APIC battery power, spikes in the power are thus unlikely. My conclusion so far: the disk is dead. I need this disk very badly because it contains the last few days of important development of which not all code was checked in the moment this happened. Are there any ways to recover dead SSD drives? The drive is a new X25-M G2 160GB model SSDSA2M160G2GC 2.5" in an extension bay and has been running without issues for 3 months on SAS.

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• How can I recover my system after running 'mkfs' on the system partition?

  - by Filip Podgórny

  I am not a Linux user, and was doing some homework, I blindly typed sudo mkfs ext3 dev/sda2 (I had Ubuntu as Windows installation). I've done few more things, and turned Ubuntu off to switch on Windows back. No operating system installed - this is the message I'm getting. I plugged my HDD onto another computer and all my files are still there. What should I do to get my windows installation back? df -l (before mkfs) /dev/loop0 29G 2,0G 27G 8% / udev 3,0G 4,0K 3,0G 1% /dev tmpfs 1,2G 900K 1,2G 1% /run none 5,0M 0 5,0M 0% /run/lock none 3,0G 1,3M 3,0G 1% /run/shm /dev/sda3 455G 123G 333G 27% /host /dev/sdb1 1,9G 820M 1,1G 43% /media/PHONE CARD mkfs output (polish, sorry) mke2fs 1.41.14 (22-Dec-2010) Etykieta systemu plików= Typ OS: Linux Rozmiar bloku=1024 (log=0) Rozmiar fragmentu=1024 (log=0) Stride=0 bloków, szerokosc Stripe=0 bloków 25688 i-wezlów, 102400 bloków 5120 bloków (5.00%) zarezerwowanych dla superuzytkownika Pierwszy blok danych=1 Maksymalna liczba bloków systemu plików=67371008 13 grup bloków 8192 bloków w grupie, 8192 fragmentów w grupie 1976 i-wezlów w grupie Kopie zapasowe superbloku zapisane w blokach: 8193, 24577, 40961, 57345, 73729 Zapis tablicy i-wezlów: zakonczono Tworzenie kroniki (4096 bloków): wykonano Zapis superbloków i podsumowania systemu plików: wykonano Ten system plików bedzie automatycznie sprawdzany co kazde 30 montowan lub co 180 dni, zaleznie co nastapi pierwsze. Mozna to zmienic poprzez tune2fs -c lub -i.

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• questions about dual-boot install Ubuntu 10.04 and Windows 7 on same hard drive

  - by Tim

  I'd like to dual-boot install Ubuntu 10.04 on the same hard drive as Windows 7 which has already been installed. As to sources on the internet: I found a website iinet about dual-boot installation of Ubuntu 10.10 and Windows 7 on the same hard drive, which I think more specific than the one on Ubuntu Community without specific version of the OSes. Since I am installing Ubuntu 10.04 instead of 10.10, my question is whether their installers are same or almost same and if I can follow iinet for my dual-boot installation? Or are there better websites for information about dual-boot installtion of Ubuntu 10.04 and Windows 7? As to shrinking Windows partitions to make free space for Ubuntu partitions: iinet uses the partition software in Ubuntu's installer to shrink the Windows partition. But I saw in many website that the partition software in Ubuntu's installer cannot guarantee shrinking Windows 7 partitions successfully, so they recommended in general to shrink Windows partitions under Windows itself using its softwares. For example, in Ubuntu Community, it says: Some people think that the Windows partition must be resized only from within Windows Vista and Windows 7 using the shrink/resize option. ... If you use GParted Partition Editor in the Ubuntu Live CD be careful. So I was wondering which way to go in my situation? As to partition for bootloader files: In iinet, I don't see there is a partition created and dedicated to boot files (i.e. Grub files). However, I saw in many websites strongly suggesting using a boot partition for Grub files, especially for the purpose of separation and protection from installed OS files. I was wondering which way I should choose and why? As to installing bootloader Grub, in iinet, I see that to install Grub it only needs to specify the hard drive device for bootloader installation. However, in ubuntuguide(for more than 2 OSes and Ubuntu 9.04), some commands are needed to run in order to put Grub configuration files in MBR, and OS partition, for the chain-load process (where to find the files for the next stage). In Ubuntu Community, there are some related sentences which I don't quite understand how to do in practice: the only thing in your computer outside of Ubuntu that needs to be changed is a small code in the MBR (Master Boot Record) of the first hard disk. The MBR code is changed to point to the boot loader in Ubuntu. If you have a problem with changing the MBR code, you might prefer to just install the code for pointing to GRUB to the first sector of your Ubuntu partition instead. If you do that during the Ubuntu installation process, then Ubuntu won't boot until you configure some other boot manager to point to Ubuntu's boot sector. Windows Vista no longer utilizes boot.ini, ntdetect.com, and ntldr when booting. Instead, Vista stores all data for its new boot manager in a boot folder. Windows Vista ships with an command line utility called bcdedit.exe, which requires administrator credentials to use. You may want to read http://go.microsoft.com/fwlink/?LinkId=112156 about it. Using a command line utility always has its learning curve, so a more productive and better job can be done with a free utility called EasyBCD, developed and mastered in during the times of Vista Beta already. EasyBCD is user friendly and many Vista users highly recommend EasyBCD. In what is quoted above, I was wondering how exactly I should change the MBR code to point to the bootloader in Ubuntu? if I fail to change MBR code, are the other suggested boot managers being bcdedit.exe and EasyBCD in Windows? With the three sources above, which one shall I follow? Thanks and regards

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• .htaccess rewrite rule to ignore a directory

  - by Kirk Strobeck

  I am running a Symphony installation out of the directory symphony but I want to remove that word from the URL in specific cases. When a user visits http://domain.com/demo It should go to http://domain.com/symphony/demo because I've added a specific rule for demo. If I haven't added a specific rule for demo in the .htaccess, then it should resolve to http://domain.com/demo as typed. This will route it to another part of our app. Here is my current rewrite rule ### Symphony 2.3.x ### Options +FollowSymlinks -Indexes <IfModule mod_rewrite.c> RewriteEngine on RewriteBase / ### SECURITY - Protect crucial files RewriteRule ^manifest/(.*)$ - [F] RewriteRule ^workspace/(pages|utilities)/(.*)\.xsl$ - [F] RewriteRule ^(.*)\.sql$ - [F] RewriteRule (^|/)\. - [F] ### DO NOT APPLY RULES WHEN REQUESTING "favicon.ico" RewriteCond %{REQUEST_FILENAME} favicon.ico [NC] RewriteRule .* - [S=14] ### IMAGE RULES RewriteRule ^image\/(.+\.(jpg|gif|jpeg|png|bmp))$ extensions/jit_image_manipulation/lib/image.php?param=$1 [B,L,NC] ### CHECK FOR TRAILING SLASH - Will ignore files RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_URI} !/$ RewriteCond %{REQUEST_URI} !(.*)/$ RewriteRule ^(.*)$ $1/ [L,R=301] ### URL Correction RewriteRule ^(symphony/)?index.php(/.*/?) $1$2 [NC] ### ADMIN REWRITE RewriteRule ^symphony\/?$ index.php?mode=administration&%{QUERY_STRING} [NC,L] RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^symphony(\/(.*\/?))?$ index.php?symphony-page=$1&mode=administration&%{QUERY_STRING} [NC,L] ### FRONTEND REWRITE - Will ignore files and folders RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.*\/?)$ index.php?symphony-page=$1&%{QUERY_STRING} [L] </IfModule> ###### How would I change the rewrite rule to support those cases?

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• Ask HTG: How Can I Check the Age of My Windows Installation?

  - by Jason Fitzpatrick

  Curious about when you installed Windows and how long you’ve been chugging along without a system refresh? Read on as we show you a simple way to see how long-in-the-tooth your Windows installation is. Dear How-To Geek, It feels like it has been forever since I installed Windows 7 and I’m starting to wonder if some of the performance issues I’m experiencing have something to do with how long ago it was installed. It isn’t crashing or anything horrible, mind you, it just feels slower than it used to and I’m wondering if I should reinstall it to wipe the slate clean. Is there a simple way to determine the original installation date of Windows on its host machine? Sincerely, Worried in Windows Although you only intended to ask one question, you actually asked two. Your direct question is an easy one to answer (how to check the Windows installation date). The indirect question is, however, a little trickier (if you need to reinstall Windows to get a performance boost). Let’s start off with the easy one: how to check your installation date. Windows includes a handy little application just for the purposes of pulling up system information like the installation date, among other things. Open the Start Menu and type cmd in the run box (or, alternatively, press WinKey+R to pull up the run dialog and enter the same command). At the command prompt, type systeminfo.exe Give the application a moment to run; it takes around 15-20 seconds to gather all the data. You’ll most likely need to scroll back up in the console window to find the section at the top that lists operating system stats. What you care about is Original Install Date: We’ve been running the machine we tested the command on since August 23 2009. For the curious, that’s one month and a day after the initial public release of Windows 7 (after we were done playing with early test releases and spent a month mucking around in the guts of Windows 7 to report on features and flaws, we ran a new clean installation and kept on trucking). Now, you might be asking yourself: Why haven’t they reinstalled Windows in all that time? Haven’t things slowed down? Haven’t they upgraded hardware? The truth of the matter is, in most cases there’s no need to completely wipe your computer and start from scratch to resolve issues with Windows and, if you don’t bog your system down with unnecessary and poorly written software, things keep humming along. In fact, we even migrated this machine from a traditional mechanical hard drive to a newer solid-state drive back in 2011. Even though we’ve tested piles of software since then, the machine is still rather clean because 99% of that testing happened in a virtual machine. That’s not just a trick for technology bloggers, either, virtualizing is a handy trick for anyone who wants to run a rock solid base OS and avoid the bog-down-and-then-refresh cycle that can plague a heavily used machine. So while it might be the case that you’ve been running Windows 7 for years and heavy software installation and use has bogged your system down to the point a refresh is in order, we’d strongly suggest reading over the following How-To Geek guides to see if you can’t wrangle the machine into shape without a total wipe (and, if you can’t, at least you’ll be in a better position to keep the refreshed machine light and zippy): HTG Explains: Do You Really Need to Regularly Reinstall Windows? PC Cleaning Apps are a Scam: Here’s Why (and How to Speed Up Your PC) The Best Tips for Speeding Up Your Windows PC Beginner Geek: How to Reinstall Windows on Your Computer Everything You Need to Know About Refreshing and Resetting Your Windows 8 PC Armed with a little knowledge, you too can keep a computer humming along until the next iteration of Windows comes along (and beyond) without the hassle of reinstalling Windows and all your apps.         

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• It’s official – Red Gate is a great place to work!

  - by red@work

  At a glittering award ceremony last week, we found out that we’re officially the 14th best small company to work for in the whole of the UK! This is no mean feat, considering that about 1,000 companies enter the Sunday Times Top 100 best companies awards each year. Most of these are in the small companies category too. It's the fourth year in a row for us to be in the Top 100 list and we're tickled pink because the results are based on employee opinion. We’re particularly proud to be the best small company in Cambridge (in the whole of East Anglia, in fact) and the best small software development company in the entire UK. So how does it all work? Well, 90% of us took the time to answer over 70 questions on categories such as management, benefits, wellbeing, leadership, giving something back and what we think of Red Gate as a whole. It makes you think about every part of day to day working life and how you feel about it. Do you slightly or strongly agree or disagree that your manager motivates your to do your best every day, or that you have confidence in Red Gate's leaders, or that you’re not spending too much time working? It's great to see that we had one of the best scores in the country for the question "Do you think your company takes advantage of you?" We got particularly high scores for management, wellbeing and for giving something back too. A few of us got dressed up and headed to London for the awards; very excited about where we’d place but slightly nervous about having to get up on stage. There was a last minute hic up with a bow tie but the Managing Editor of the Sunday Times kindly stepped in to offer his assistance just before we had our official photo taken. We were nominated for two Special Recognition Awards. Despite not bringing them home this year, we're very proud to be nominated as there are only three nominations in each category. First we were up for the Training and Development award. Best Companies loved that we get together at lunchtimes to teach each other photography, cookery and French, as well as our book clubs and techie talks. And of course they liked our opportunities to go on training courses and to jet off to international conferences. Our other nomination was for the Wellbeing award. Best Companies loved our free food (and let’s face it, so do we). Porridge or bacon sandwiches for breakfast, a three course hot dinner, and free fruit and cereals all day long. If all that has an affect on the waistline then there are plenty of sporty activities for us all to get involved in, such as yoga, running or squash. Or if that’s not your thing then a relaxing massage helps us all to unwind every few months or so. The awards were hosted by news presenter Kate Silverton. She gave us a special mention during the ceremony for having great customer engagement as well as employee engagement, after we told her about Rodney Landrum (a Friend of Red Gate) tattooing our logo on his arm. We showed off our customised dinner jacket (thanks to Dom from Usability) with a flashing Red Gate logo on the back and she seemed suitability impressed. Back in the office the next day, we popped open the champagne and raised a glass to our success. Neil, our joint CEO, talked about how pleased he was with the award because it's based on the opinions of the people that count – us. You can read more about the Sunday Times awards here. By the way, we're still growing and are still hiring. If you’d like to keep up with our latest vacancies then why not follow us on Twitter at twitter.com/redgatecareers. Right now we're busy hiring in development, test, sales, product management, web development, and project management. Here's a link to our current job opportunities page – we'd love to hear from great people who are looking for a great place to work! After all, we're only great because of the people who work here. Post by: Alice Chapman

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• Oracle at HR Tech: What a Difference a Year Makes

  - by Natalia Rachelson

  Last week, I had the privilege of attending the famous HR Technology Conference (HR Tech) in my new hometown of Chicago. This annual event, which draws the who of who in the world of HR technology, was by far the biggest.  It wasn't just the highest level of attendance that was mind blowing, but also the amazing quality of attendees. Kudos go to the organizers, especially Bill Kutik for pulling together such a phenomenal conference. Conference highlights included Naomi Bloom's (http://infullbloom.us) Masters Panel and Mark Hurd's General Session on the last day of the conference. Naomi managed to do the seemingly impossible -- get all of the industry heavyweights and fierce competitors to travel to Chicago for her panel. Here are the executives she hosted: Our own Steve Miranda Sanjay Poonen, President Global Solutions, SAP Stan Swete, CTO, Workday Mike Capone, VP for Product Development and CIO, ADP John Wookey, EVP, Social Applications, Salesforce.com Adam Rogers, CTO, Ultimate Software       I bet you think "WOW" when you look at these names. Just this panel by itself would have been enough of a draw for any tech conference, so Naomi and Bill really scored. TechTarget published a great review of the conference here.  And here are a few highlights from Steve. "Steve Miranda, EVP Apps Dev Oracle, said delivering software in the cloud helps vendors shape their products to customer needs more efficiently. "As vendors, we're able to improve the software faster," he said. "We can see in real time what customers are using and not using." Miranda underscored Oracle's commitment to socializing its HCM platform,and named recruiting as an area where social has had a significant impact. "We want to make social a part of the fabric, not a separate piece," he said. "Already, if you're doing recruiting without social, it probably doesn't make any sense."" Having Mark Hurd at the conference was another real treat and everyone took notice.  The Business of HR publication covered Mark's participation at HR Tech and the full article is available here. Here is what Business of HR had to say: "In truth, the story of Oracle today is a story similar to many of the current and potential customers they faced at the conference this week. Their business is changing and growing. They've dealt with acquisitions of their own and their competitors continue to nip at their heels. They are dealing with growth (and yes, they are hiring in case you're interested). They have concerns about talent as well. If Oracle feels as strongly about their products as they seem to be, they will be getting their co-president in front of a lot more groups of current and potential customers like they did at the HR Technology Conference this year. And here's hoping this is one executive who won't stop talking about the importance of talent just because he isn't at the HR tech conference anymore." Natalia RachelsonSenior Director, Oracle Applications

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• Collision detection via adjacent tiles - sprite too big

  - by BlackMamba

  I have managed to create a collision detection system for my tile-based jump'n'run game (written in C++/SFML), where I check on each update what values the surrounding tiles of the player contain and then I let the player move accordingly (i. e. move left when there is an obstacle on the right side). This works fine when the player sprite is not too big: Given a tile size of 5x5 pixels, my solution worked quite fine with a spritesize of 3x4 and 5x5 pixels. My problem is that I actually need the player to be quite gigantic (34x70 pixels given the same tilesize). When I try this, there seems to be an invisible, notably smaller boundingbox where the player collides with obstacles, the player also seems to shake strongly. Here some images to explain what I mean: Works: http://tinypic.com/r/207lvfr/8 Doesn't work: http://tinypic.com/r/2yuk02q/8 Another example of non-functioning: http://tinypic.com/r/kexbwl/8 (the player isn't falling, he stays there in the corner) My code for getting the surrounding tiles looks like this (I removed some parts to make it better readable): std::vector<std::map<std::string, int> > Game::getSurroundingTiles(sf::Vector2f position) { // converting the pixel coordinates to tilemap coordinates sf::Vector2u pPos(static_cast<int>(position.x/tileSize.x), static_cast<int>(position.y/tileSize.y)); std::vector<std::map<std::string, int> > surroundingTiles; for(int i = 0; i < 9; ++i) { // calculating the relative position of the surrounding tile(s) int c = i % 3; int r = static_cast<int>(i/3); // we subtract 1 to place the player in the middle of the 3x3 grid sf::Vector2u tilePos(pPos.x + (c - 1), pPos.y + (r - 1)); // this tells us what kind of block this tile is int tGid = levelMap[tilePos.y][tilePos.x]; // converts the coords from tile to world coords sf::Vector2u tileRect(tilePos.x*5, tilePos.y*5); // storing all the information std::map<std::string, int> tileDict; tileDict.insert(std::make_pair("gid", tGid)); tileDict.insert(std::make_pair("x", tileRect.x)); tileDict.insert(std::make_pair("y", tileRect.y)); // adding the stored information to our vector surroundingTiles.push_back(tileDict); } // I organise the map so that it is arranged like the following: /* * 4 | 1 | 5 * -- -- -- * 2 | / | 3 * -- -- -- * 6 | 0 | 7 * */ return surroundingTiles; } I then check in a loop through the surrounding tiles, if there is a 1 as gid (indicates obstacle) and then check for intersections with that adjacent tile. The problem I just can't overcome is that I think that I need to store the values of all the adjacent tiles and then check for them. How? And may there be a better solution? Any help is appreciated. P.S.: My implementation derives from this blog entry, I mostly just translated it from Objective-C/Cocos2d.

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• Cannot log into Windows XP Embedded after changing computer name

  - by bignis

  Hi everyone, I purchased a tablet pc running Windows XP Embedded. The tablet was used in a medical clinic on a domain. For illustrative purposes, say the computer name was "COMPLEXCOMPUTERNAME". There was an administrator account, so I changed the password on account "COMPLEXCOMPUTERNAME\Administrator" to a blank password. I logged out and logged in successfully with the blank administrator password when the log-in dialog said "Log in to COMPLEXCOMPUTERNAME (this computer)". Next I renamed the computer from COMPLEXCOMPUTERNAME to SIMPLECOMPUTERNAME, which required a reboot. I did so, and I can't log in anymore. The log in screen still just says "Log in to COMPLEXCOMPUTERNAME (this computer)", but the account "COMPLEXCOMPUTERNAME\Administrator" no longer works. I suspect that this is because the computer has been renamed to SIMPLECOMPUTERNAME and it can no longer find the account. The "Log in to" dropdown can't be typed in, so I can't change the computer name Windows is trying to log into. I fear that I'm stuck. Is there a way I can get Windows to log into the computer name that I chose? Thanks! -Mike

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• arch openldap authentication failure

  - by nonus25

  I setup the openldap, all look fine but i cant setup authentication, #getent shadow | grep user user:*::::::: tuser:*::::::: tuser2:*::::::: #getent passwd | grep user git:!:999:999:git daemon user:/:/bin/bash user:x:10000:2000:Test User:/home/user/:/bin/zsh tuser:x:10000:2000:Test User:/home/user/:/bin/zsh tuser2:x:10002:2000:Test User:/home/tuser2/:/bin/zsh from root i can login as a one of these users #su - tuser2 su: warning: cannot change directory to /home/tuser2/: No such file or directory 10:24 tuser2@juliet:/root i cant login via ssh also passwd is not working #ldapwhoami -h 10.121.3.10 -D "uid=user,ou=People,dc=xcl,dc=ie" ldap_bind: Server is unwilling to perform (53) additional info: unauthenticated bind (DN with no password) disallowed 10:30 root@juliet:~ #ldapwhoami -h 10.121.3.10 -D "uid=user,ou=People,dc=xcl,dc=ie" -W Enter LDAP Password: ldap_bind: Invalid credentials (49) typed password by me is correct /etc/openldap/slapd.conf access to dn.base="" by * read access to dn.base="cn=Subschema" by * read access to * by self write by users read by anonymous read access to * by dn="uid=root,ou=Roles,dc=xcl,dc=ie" write by users read by anonymous auth access to attrs=userPassword,gecos,description,loginShell by self write access to attrs="userPassword" by dn="uid=root,ou=Roles,dc=xcl,dc=ie" write by anonymous auth by self write by * none access to * by dn="uid=root,ou=Roles,dc=xcl,dc=ie" write by dn="uid=achmiel,ou=People,dc=xcl,dc=ie" write by * search access to attrs=userPassword by self =w by anonymous auth access to * by self write by users read database hdb suffix "dc=xcl,dc=ie" rootdn "cn=root,dc=xcl,dc=ie" rootpw "{SSHA}AM14+..." there are some parts of that conf file /etc/openldap/ldap.conf looks : BASE dc=xcl,dc=ie URI ldap://192.168.10.156/ TLS_REQCERT allow TIMELIMIT 2 so my question is what i am missing that ldap not allow me login by using password ?

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• Connect Chrome to TOR

  - by Jack M

  I'm having difficulty connecting Chrome to TOR. I started trying yesterday. I started Vidalia and the TOR Browser and then followed the advice at http://lifehacker.com/5614732/create-a-tor-button-in-chrome-for-on+demand-anonymous-browsing - downloading Proxy Switchy and setting it up as stated. This resulted in Error 130 (net::ERR_PROXY_CONNECTION_FAILED) (in Chrome, when I tried to load a webpage). So I looked into Vidalia's settings and noticed that it appeared to be using port 9051, so I set that instead of 8118 as everyone on the internet seems to be suggesting. Then I got a new error: Error 111 (net::ERR_TUNNEL_CONNECTION_FAILED). Digging a bit, I found that Tor should be set as a SOCKS proxy, not an HTTP proxy, so I unticked "use same settings for all protocols" in Proxy Switchy and just set localhost:9051 for SOCKS. That got me Error 7 (net::ERR_TIMED_OUT). And that's when I came here for help. I typed up the above question, but then at the last minute decided to do a bit more reading and found someone here suggested using some command line arguments via a Windows shortcut: "C:\snip\chrome.exe" --proxy-server=";socks=127.0.0.1:9051;sock4=127.0.0.1:9051;sock5=127.0.0.1:9051" --incognito check.torproject.org And that worked perfectly. Yesterday. Today it doesn't, so I'm having to post this question after all. check.torproject.org gives me a "no" with Chrome, but a "yes" with the default Tor Browser. I tried closing Chrome and restarting it (yes, with the correct shortcut) after Vidalia started, but still nothing. The port number hasn't changed or anything. What gives? EDIT: I realized I had a "non tor" instance of Chrome running and that possibly the was causing the command line args t be ignored when I started the new instance. Closed all instances of chrome and ran my Chrome Tor shortcut, and it did get rid of the "not using Tor" message -- because I got another Time Out error instead. Vidalia's bandwidth graph didn't even blink.

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• What are the disadvantages of self-encapsulation?

  - by Dave Jarvis

  Background Tony Hoare's billion dollar mistake was the invention of null. Subsequently, a lot of code has become riddled with null pointer exceptions (segfaults) when software developers try to use (dereference) uninitialized variables. In 1989, Wirfs-Brock and Wikerson wrote: Direct references to variables severely limit the ability of programmers to re?ne existing classes. The programming conventions described here structure the use of variables to promote reusable designs. We encourage users of all object-oriented languages to follow these conventions. Additionally, we strongly urge designers of object-oriented languages to consider the effects of unrestricted variable references on reusability. Problem A lot of software, especially in Java, but likely in C# and C++, often uses the following pattern: public class SomeClass { private String someAttribute; public SomeClass() { this.someAttribute = "Some Value"; } public void someMethod() { if( this.someAttribute.equals( "Some Value" ) ) { // do something... } } public void setAttribute( String s ) { this.someAttribute = s; } public String getAttribute() { return this.someAttribute; } } Sometimes a band-aid solution is used by checking for null throughout the code base: public void someMethod() { assert this.someAttribute != null; if( this.someAttribute.equals( "Some Value" ) ) { // do something... } } public void anotherMethod() { assert this.someAttribute != null; if( this.someAttribute.equals( "Some Default Value" ) ) { // do something... } } The band-aid does not always avoid the null pointer problem: a race condition exists. The race condition is mitigated using: public void anotherMethod() { String someAttribute = this.someAttribute; assert someAttribute != null; if( someAttribute.equals( "Some Default Value" ) ) { // do something... } } Yet that requires two statements (assignment to local copy and check for null) every time a class-scoped variable is used to ensure it is valid. Self-Encapsulation Ken Auer's Reusability Through Self-Encapsulation (Pattern Languages of Program Design, Addison Wesley, New York, pp. 505-516, 1994) advocated self-encapsulation combined with lazy initialization. The result, in Java, would resemble: public class SomeClass { private String someAttribute; public SomeClass() { setAttribute( "Some Value" ); } public void someMethod() { if( getAttribute().equals( "Some Value" ) ) { // do something... } } public void setAttribute( String s ) { this.someAttribute = s; } public String getAttribute() { String someAttribute = this.someAttribute; if( someAttribute == null ) { setAttribute( createDefaultValue() ); } return someAttribute; } protected String createDefaultValue() { return "Some Default Value"; } } All duplicate checks for null are superfluous: getAttribute() ensures the value is never null at a single location within the containing class. Efficiency arguments should be fairly moot -- modern compilers and virtual machines can inline the code when possible. As long as variables are never referenced directly, this also allows for proper application of the Open-Closed Principle. Question What are the disadvantages of self-encapsulation, if any? (Ideally, I would like to see references to studies that contrast the robustness of similarly complex systems that use and don't use self-encapsulation, as this strikes me as a fairly straightforward testable hypothesis.)

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• PASS Summit 2013 Review

  - by Ajarn Mark Caldwell

  As a long-standing member of PASS who lives in the greater Seattle area and has attended about nine of these Summits, let me start out by saying how GREAT it was to go to Charlotte, North Carolina this year.  Many of the new folks that I met at the Summit this year, upon hearing that I was from Seattle, commented that I must have been disappointed to have to travel to the Summit this year after 5 years in a row in Seattle.  Well, nothing could be further from the truth.  I cheered loudly when I first heard that the 2013 Summit would be outside Seattle.  I have many fond memories of trips to Orlando, Florida and Grapevine, Texas for past Summits (missed out on Denver, unfortunately).  And there is a funny dynamic that takes place when the conference is local.  If you do as I have done the last several years and saved my company money by not getting a hotel, but rather just commuting from home, then both family and coworkers tend to act like you’re just on a normal schedule.  For example, I have a young family, and my wife and kids really wanted to still see me come home “after work”, but there are a whole lot of after-hours activities, social events, and great food to be enjoyed at the Summit each year.  Even more so if you really capitalize on the opportunities to meet face-to-face with people you either met at previous summits or have spoken to or heard of, from Twitter, blogs, and forums.  Then there is also the lovely commuting in Seattle traffic from neighboring cities rather than the convenience of just walking across the street from your hotel.  So I’m just saying, there are really nice aspects of having the conference 2500 miles away. Beyond that, the training was fantastic as usual.  The SQL Server community has many outstanding presenters and experts with deep knowledge of the tools who are extremely willing to share all of that with anyone who wants to listen.  The opening video with PASS President Bill Graziano in a NASCAR race turned dream sequence was very well done, and the keynotes, as usual, were great.  This year I was particularly impressed with how well attended were the Professional Development sessions.  Not too many years ago, those were very sparsely attended, but this year, the two that I attended were standing-room only, and these were not tiny rooms.  I would say this is a testament to both the maturity of the attendees realizing how important these topics are to career success, as well as to the ever-increasing skills of the presenters and the program committee for selecting speakers and topics that resonated with people.  If, as is usually the case, you were not able to get to every session that you wanted to because there were just too darn many good ones, I encourage you to get the recordings. Overall, it was a great time as these events always are.  It was wonderful to see old friends and make new ones, and the people of Charlotte did an awesome job hosting the event and letting their hospitality shine (extra kudos to SQLSentry for all they did with the shuttle, maps, and other event sponsorships).  We’re back in Seattle next year (it is a release year, after all) but I would say that with the success of this year’s event, I strongly encourage the Board and PASS HQ to firmly reestablish the location rotation schedule.  I’ll even go so far as to suggest standardizing on an alternating Seattle – Charlotte schedule, or something like that. If you missed the Summit this year, start saving now, and register early, so you can join us!

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