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• Silverlight Cream for April 08, 2010 -- #834

  - by Dave Campbell

  In this Issue: Michael Washington, Phil Middlemiss, Yochay Kiriaty, Giorgetti Alessandro, Mike Snow, John Papa, SilverLaw, smartyP, and Pete Brown. Shoutouts: Steve Wortham sent me a link to his RegEx tool that is written in Silverlight... definitely worth a look: Introducing Code Hinting for Regular Expressions Joshua Blake posted his MIX10 materials: MIX10 NUI session sample code From SilverlightCream.com: Silverlight MVVM: An (Overly) Simplified Explanation Michael Washington has a tutorial up for getting your arms (and head) around MVVM and Silverlight, and Blend too. A Chrome and Glass Theme - Part 3 Phil Middlemiss has part 3 up of his tutorial series on building an awesome theme for Silverlight... he's styling the textbox and checkbox this time around, and improving the button too Automatic Rotation Support or Automatic Multi-Orientation Layout Support for Windows Phone Yochay Kiriaty is giving up some WP7 goodness with his post on Multi-Orientation Layout Support ... yeah I had to say it twice myself :) good links and all the code in addition to the good blog post Silverlight Navigation Framework: resolve the pages using an IoC container Giorgetti Alessandro has some pretty cool code up as a proof of concept of using an IoC container with the Navigation Framework of Silverlight 4. Silverlight Tip of the Day No. 109 – Attach to Process Debugging Mike Snow is back doing Tips of the Day... and number 109 is showing how to attach the debugger to a running Silverlight app. Silverlight TV 20: Community Driven Development with WCF RIA Services In his latest Silverlight TV episode, John Papa talks with Jeff Handley about RIA Services, and how feedback from the community helped shape the product. ChildWindowMouseScrollResizeBehavior - Silverlight 3 SilverLaw has a new Behavior up at the Expression Gallery that gives you resizing on a ChildWindow using the Mouse Wheel. Creating a Windows Phone 7 Metro Style Pivot Application [Part 3] smartyP has the 3rd and final episode for his WP7 Pivot up, and this one includes not only the source but a video tutorial. Layout Rounding Pete Brown talks about Layout Rounding and it has nothing to do with rounding corners... it has to do with rounding off where your objects get placed pixel-wise ... I've blogged about this seemingly-anti-aliasing more than once... Pete has the real answer Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• apt-get error, cannot install many packages?

  - by tech

  How do I fix this? It shows an error, and I don't know how to fix it. I want to install crossover. Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... failed. The following packages have unmet dependencies: crossover:i386 : Depends: libc6:i386 (>= 2.3) but it is not installed Depends: libice6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libsm6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libx11-6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libxext6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libfreetype6:i386 but it is not installed Depends: libz1:i386 Depends: perl5-base:i386 Depends: perl-modules:i386 but it is not installable Depends: python:i386 (>= 2.4) but it is not installed Depends: python-gtk2:i386 but it is not installed Depends: python-glade2:i386 but it is not installed Depends: desktop-file-utils:i386 but it is not installed Depends: libasound2:i386 but it is not installed Depends: libgl1:i386 Depends: libxrandr2:i386 but it is not installed E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages. E: Unable to correct dependencies EDIT I have another recent error. You might want to run 'apt-get -f install' to correct these. The following packages have unmet dependencies: crossover:i386 : Depends: libc6:i386 (= 2.3) but it is not installed Depends: libice6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libsm6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libx11-6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libxext6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libfreetype6:i386 but it is not installed Depends: libz1:i386 Depends: perl5-base:i386 Depends: perl-modules:i386 but it is not installable Depends: python:i386 (= 2.4) but it is not installed Depends: python-gtk2:i386 but it is not installed Depends: python-glade2:i386 but it is not installed Depends: desktop-file-utils:i386 but it is not installed Depends: libasound2:i386 but it is not installed Depends: libgl1:i386 Depends: libxrandr2:i386 but it is not installed E: Unmet dependencies. Try using -f. running " apt-get -f install " gives me the same error everytime.

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• Auto Mocking using JustMock

  - by mehfuzh

  Auto mocking containers are designed to reduce the friction of keeping unit test beds in sync with the code being tested as systems are updated and evolve over time. This is one sentence how you define auto mocking. Of course this is a more or less formal. In a more informal way auto mocking containers are nothing but a tool to keep your tests synced so that you don’t have to go back and change tests every time you add a new dependency to your SUT or System Under Test. In Q3 2012 JustMock is shipped with built in auto mocking container. This will help developers to have all the existing fun they are having with JustMock plus they can now mock object with dependencies in a more elegant way and without needing to do the homework of managing the graph. If you are not familiar with auto mocking then I won't go ahead and educate you rather ask you to do so from contents that is already made available out there from community as this is way beyond the scope of this post. Moving forward, getting started with Justmock auto mocking is pretty simple. First, I have to reference Telerik.JustMock.Container.DLL from the installation folder along with Telerik.JustMock.DLL (of course) that it uses internally and next I will write my tests with mocking container. It's that simple! In this post first I will mock the target with dependencies using current method and going forward do the same with auto mocking container. In short the sample is all about a report builder that will go through all the existing reports, send email and log any exception in that process. This is somewhat my  report builder class looks like: Reporter class depends on the following interfaces: IReporBuilder: used to  create and get the available reports IReportSender: used to send the reports ILogger: used to log any exception. Now, if I just write the test without using an auto mocking container it might end up something like this: Now, it looks fine. However, the only issue is that I am creating the mock of each dependency that is sort of a grunt work and if you have ever changing list of dependencies then it becomes really hard to keep the tests in sync. The typical example is your ASP.NET MVC controller where the number of service dependencies grows along with the project. The same test if written with auto mocking container would look like: Here few things to observe: I didn't created mock for each dependencies There is no extra step creating the Reporter class and sending in the dependencies Since ILogger is not required for the purpose of this test therefore I can be completely ignorant of it. How cool is that ? Auto mocking in JustMock is just released and we also want to extend it even further using profiler that will let me resolve not just interfaces but concrete classes as well. But that of course starts the debate of code smell vs. working with legacy code. Feel free to send in your expert opinion in that regard using one of telerik’s official channels. Hope that helps

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• iPad: How To Soft Reset, Restore Factory Settings And Erase All Content

  - by Gopinath

  iPad is an amazing gadget from Apple and everyone of us loves to own it. If you are a lucky one to own an iPad here are some basic troubleshooting features that you should be aware. There is no doubt that iPad is an amazing gadget, but similar to other electronic gadgets it refuses to work now and then. When your iPad hangs or refuses to respond you can soft reset it by holding the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears. This just reset your iPad and it’s similar to force rebooting your PC. All your settings and data are untouched during this process. The embedded video below shows how to turn off and soft reset an iPad. If iPad Doesn’t Work After Soft Reset – Restore Factory Settings Soft reset should resolve most of the iPad issues like hanging, not responding properly, etc. In case even if your iPad does not work properly after soft reset you can try reset all the setting to factory defaults by navigating through the Home screen > Settings > General > Reset > Reset All Settings.  This will reset all your settings and other iPad customizations to factory defaults but your data(images, documents, apps, etc.) are left untouched. How To Erase All Content Of iPad You may ask why should I erase all the content of iPad? Well may be you are willing to sell it off on eBay by erasing all the content or you want start afresh or some other reason. It is easy to reset all the settings of iPad as well as wipe out all content by navigating through Home screen > General > Reset >  “Erase All Content and Settings.” CC Image credit flickr/korosirego This article titled,iPad: How To Soft Reset, Restore Factory Settings And Erase All Content, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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• What is Database Continuous Integration?

  - by SQLDev

  Although not everyone is practicing continuous integration, many have at least heard of the concept. A recent poll on www.simple-talk.com indicates that 40% of respondents are employing the technique. It is widely accepted that the earlier issues are identified in the development process, the lower the cost to the development process. The worst case scenario, of course, is for the bug to be found by the customer following the product release. A number of Agile development best practices have evolved to combat this problem early in the development process, including pair programming, code inspections and unit testing. Continuous integration is one such Agile concept that tackles the problem at the point of committing a change to source control. This can alternatively be run on a regular schedule. This triggers a sequence of events that compiles the code and performs a variety of tests. Often the continuous integration process is regarded as a build validation test, and if issues were to be identified at this stage, the testers would simply not 'waste their time ' and touch the build at all. Such a ‘broken build’ will trigger an alert and the development team’s number one priority should be to resolve the issue. How application code is compiled and tested as part of continuous integration is well understood. However, this isn’t so clear for databases. Indeed, before I cover the mechanics of implementation, we need to decide what we mean by database continuous integration. For me, database continuous integration can be implemented as one or more of the following: 1)      Your application code is being compiled and tested. You therefore need a database to be maintained at the corresponding version. 2)      Just as a valid application should compile, so should the database. It should therefore be possible to build a new database from scratch. 3)     Likewise, it should be possible to generate an upgrade script to take your already deployed databases to the latest version. I will be covering these in further detail in future blogs. In the meantime, more information can be found in the whitepaper linked off www.red-gate.com/ci If you have any questions, feel free to contact me directly or post a comment to this blog post.

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• What is Database Continuous Integration?

  - by David Atkinson

  Although not everyone is practicing continuous integration, many have at least heard of the concept. A recent poll on www.simple-talk.com indicates that 40% of respondents are employing the technique. It is widely accepted that the earlier issues are identified in the development process, the lower the cost to the development process. The worst case scenario, of course, is for the bug to be found by the customer following the product release. A number of Agile development best practices have evolved to combat this problem early in the development process, including pair programming, code inspections and unit testing. Continuous integration is one such Agile concept that tackles the problem at the point of committing a change to source control. This can alternatively be run on a regular schedule. This triggers a sequence of events that compiles the code and performs a variety of tests. Often the continuous integration process is regarded as a build validation test, and if issues were to be identified at this stage, the testers would simply not 'waste their time ' and touch the build at all. Such a ‘broken build’ will trigger an alert and the development team’s number one priority should be to resolve the issue. How application code is compiled and tested as part of continuous integration is well understood. However, this isn’t so clear for databases. Indeed, before I cover the mechanics of implementation, we need to decide what we mean by database continuous integration. For me, database continuous integration can be implemented as one or more of the following: 1)      Your application code is being compiled and tested. You therefore need a database to be maintained at the corresponding version. 2)      Just as a valid application should compile, so should the database. It should therefore be possible to build a new database from scratch. 3)     Likewise, it should be possible to generate an upgrade script to take your already deployed databases to the latest version. I will be covering these in further detail in future blogs. In the meantime, more information can be found in the whitepaper linked off www.red-gate.com/ci If you have any questions, feel free to contact me directly or post a comment to this blog post.

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• Mysql 5.5 server not working

  - by rajesh

  I had Ubuntu 14.04 installed on my system. I recently updated ubuntu and now my mysql does not start and workbench says that mysql server has been stopped. And when i try to start it gives me the following error 2014-08-12 23:02:04 - Checking server status... 2014-08-12 23:02:04 - Trying to connect to MySQL... 2014-08-12 23:02:04 - Can't connect to MySQL server on '127.0.0.1' (111) (2003) 2014-08-12 23:02:04 - Assuming server is not running 2014-08-12 23:02:04 - Server start done. 2014-08-12 23:02:04 - Checking server status... 2014-08-12 23:02:04 - Trying to connect to MySQL... 2014-08-12 23:02:04 - Can't connect to MySQL server on '127.0.0.1' (111) (2003) 2014-08-12 23:02:04 - Assuming server is not running And also when i try to login using terminal (mysql -u root -p <password>) i get the following error: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) I have also tried to reinstall Ubuntu but i am unable to do so. Gives me the following error: Reading package lists... Done Building dependency tree Reading state information... Done mysql-server-5.5 is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded. I have data which i have not taken backup of as i am unable to log into the server. I am a newbie please help me resolve this issue without losing my data. Awaiting for your earliest response. Below is the error message from cat /var/log/mysql/error.log 140813 21:22:50 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use the full name instead. 140813 21:22:50 [Note] Plugin 'FEDERATED' is disabled. 140813 21:22:50 InnoDB: The InnoDB memory heap is disabled 140813 21:22:50 InnoDB: Mutexes and rw_locks use GCC atomic builtins 140813 21:22:50 InnoDB: Compressed tables use zlib 1.2.8 140813 21:22:50 InnoDB: Using Linux native AIO 140813 21:22:50 InnoDB: Initializing buffer pool, size = 128.0M 140813 21:22:50 InnoDB: Completed initialization of buffer pool 140813 21:22:50 InnoDB: highest supported file format is Barracuda. 140813 21:22:50 InnoDB: Waiting for the background threads to start 140813 21:22:51 InnoDB: 5.5.38 started; log sequence number 80726593570 140813 21:22:51 [Note] Server hostname (bind-address): '127.0.0.1'; port: 3306 140813 21:22:51 [Note] - '127.0.0.1' resolves to '127.0.0.1'; 140813 21:22:51 [Note] Server socket created on IP: '127.0.0.1'. 140813 21:22:51 [ERROR] Fatal error: Can't open and lock privilege tables: Incorrect file format 'user'

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• The Politics of Junk Filtering

  - by mikef

  If the national postal service, such as the Royal Mail in the UK, were to go through your letters and throw away all the stuff it considered to be junk instead of delivering it to you, you might be rather pleased until you discovered that it took a too liberal decision about what was junk. Catalogs you'd asked for? Junk! Requests from charities? Who needs them! Parcels from competing carriers? Toss them away! The possibility for abuse for an agency that was in a monopolistic position is just too scary to tolerate. After all, the postal service could charge 'consultancy fees' to any sender who wanted to guarantee that his stuff got delivered, or they could even farm this out to other companies. Because Microsoft Outlook is just about the only email client used by the international business community in the west, its' SPAM filter is the final arbiter as to what gets read. My Outlook 2007, set to the default settings, junks all the perfectly innocent email newsletters that I subscribe to. Whereas Google Mail, Yahoo, and LIVE are all pretty accurate in detecting spam, Outlook makes all sorts of silly mistakes. The documentation speaks techno-babble about 'advanced heuristics', but the result boils down to an inaccurate mess. The more that Microsoft fiddles with it, the stickier the mess. To make matters worse, it still lets through obvious spam. The filter is occasionally updated along with other automatic 'security' updates you opt for automatic updates. As an editor for a popular online publication that provides a newsletter service, this is an obvious source of frustration. We follow all the best-practices we know about. We ensure that it is a trivial task to opt out of receiving it. We format the newsletter to the requirements of the Service Providers. We follow up, and resolve, every complaint. As a result, it gets delivered. It is galling to discover that, after all that effort, Outlook then often judges the contents to be junk on a whim, so you don't get to see it. A few days ago, Microsoft published the PST file format specification, under pressure from a European Union interoperability investigation by ECIS (the European Committee for Interoperable Systems). The objective was that other applications could then access existing PST files so as to migrate from existing Outlook installations to other solutions. Joaquín Almunia, the current competition commissioner, should now turn his attention to the more subtle problems of Microsoft Outlook. The Junk problem seems to have come from clumsy implementation of client-side spam filtering rather than from deliberate exploitation of a monopoly on the desktop email client for businesses, but it is a growing problem nonetheless. Cheers, Michael Francis

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• I still think Twitter is dead &hellip; but

  - by Randy Walker

  Twitter finally hit the mainstream about 8 months ago, but I’ve been saying for a couple of years now, without a real way for the company to earn money, what’s the future fate of Twitter?  On the personal side, where is the real value for the users?  For the most part, Twitter has replaced most people’s IM (instant messaging), at least in the technology circles I run in.  It still has value for users as a communication tool.  But I see it more as a fad.  My prediction is over the next 6 months we’ll start seeing a usage drop (if we haven’t already started to see it). On the business side, how does Twitter make money?  It doesn’t.  If you use the text messaging capabilities, you see a few ads.  But most smart phone and PC users, won’t ever see them.  I still think Twitter has the best chance to make money by forcing the “collectors” to pay money.  You know what I mean by “collector”, those people that collect tons of followers or friends.  If Twitter caps the number of followers and makes you pay to have more, would you?  The normal twitter user doesn’t have that many followers, and this is where my title comes in … BUT The financial value for Twitter is really seen through businesses connecting with their customers.  I’ve seen 3 effective ways this has been accomplished. 1. Giving your customers a coupon or announcing a sale My favorite is @amazonmp3, Being a huge music lover, I get notified when they put music on sale. Various restaurants like @ruthschris_ARK will let their favorite customers know about certain specials @BluefinMemphis I was traveling through Memphis once looking for a sushi restaurant when they had %50 off if we mentioned we saw them on Twitter.  It was their first attempt at trying to encourage customers in the door, and after talking with the management, it was a huge success 2. Giveaways @namecheap Several companies have started huge marketing campaigns, but my favorite is watching companies post trivia questions, and the first person to respond wins a prize. 3. Responding to Customer Complaints I once posted a complaint about American Express (a company that I have slowly come to really dislike) but they actually had someone contact me to try and resolve the issue.  I give them credit for paying attention, but still dislike them for their horrible credit practices.

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• Unable to add users to Microsoft Dynamics CRM 4.0 after database restore

  - by Wes Weeks

  Working with a client in our Multi-tenant CRM environment who was doing a database migration into CRM and as part of the process, a backup of their Organization_MSCRM database was taken just prior to starting the migration in case it needed to be restored and run a second time. In this case it did, so I restored the database and let the client know he should be good to go.  A few hours later I received a call that they were unable to add some new users, they would appear as available when using the add multiple user wizard, but anyone added would not be added to CRM.  It was also disucussed that these users had been added to CRM initally AFTER the database backup had been taken. I turned on tracing and tried to add the users through both the single user form and multiple user interface and was unable to do so.  The error message in the logs wasn't much help: Unexpected error adding user [email protected]: Microsoft.Crm.CrmException: INVALID_WRPC_TOKEN: Validate WRPC Token: WRPCTokenState=Invalid, TOKEN_EXPIRY=4320, IGNORE_TOKEN=False Searching on Google or bing didn't offer any assitance.  Apparently not a very common problem, or no one has been able to resolve. I did some searching in the MSCRM_CONFIG database and found that their are several user tables there and after getting my head around the structure found that there were enties here for users that were not part of the restored DB.  It seems that new users are added to both the Orgnaization_MSCRM and MSCRM_CONFIG and after the restore these were out of sync. I needed to remove the extra entries in order to address.  Restoring the MSCRM_CONFIG database was not an option as other clients could have been adding users at this point and to restore would risk breaking their instances of CRM.  Long story short, I was finally able to generate a script to remove the bad entries and when I tried to add users again, I was succesful.  In case someone else out there finds themselves in a similar situation, here is the script I used to delete the bad entries. DECLARE @UsersToDelete TABLE (   UserId uniqueidentifier )   Insert Into @UsersToDelete(UserId) Select UserId from [MSCRM_CONFIG].[dbo].[SystemUserOrganizations] Where CrmuserId Not in (select systemuserid from Organization_MSCRM.dbo.SystemUserBase) And OrganizationId = '00000000-643F-E011-0000-0050568572A1' --Id From the Organization table for this instance   Delete From [MSCRM_CONFIG].[dbo].[SystemUserAuthentication]   Where UserId in (Select UserId From @UsersToDelete)   Delete From [MSCRM_CONFIG].[dbo].[SystemUserOrganizations] Where UserId in (Select UserId From @UsersToDelete)   Delete From [MSCRM_CONFIG].[dbo].[SystemUser] Where Id in (Select UserId From @UsersToDelete)

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• How do I install a 32-bit Java runtime on an amd64 server with multiarch?

  - by kbyrd

  I'm a long time Ubuntu user, but I haven't been following the community for the last several versions. I just did fresh default minimal amd64 install of Oneiric and I need a 32-bit JRE for a particular application. I last did this on 10.10, so I am not familiar with the multiarch stuff. Instead of installing ia32-libs, I read a bit and tried: aptitude install default-jre-headless:i386 But that just got me: The following NEW packages will be installed: default-jre-headless{b} openjdk-6-jre-headless{ab} The following packages are RECOMMENDED but will NOT be installed: icedtea-6-jre-cacao icedtea-6-jre-jamvm 0 packages upgraded, 2 newly installed, 0 to remove and 0 not upgraded. Need to get 27.3 MB of archives. After unpacking 82.1 MB will be used. The following packages have unmet dependencies: default-jre-headless: Depends: java-common which is a virtual package. openjdk-6-jre-headless: Depends: openjdk-6-jre-lib (>= 6b23~pre10-0ubuntu5) which is a virtual package. Depends: ca-certificates-java which is a virtual package. Depends: tzdata-java which is a virtual package. Depends: java-common (>= 0.28) which is a virtual package. Depends: libcups2 but it is not going to be installed. Depends: liblcms1 but it is not going to be installed. Depends: libjpeg62 but it is not going to be installed. Depends: libnss3-1d (>= 3.12.9+ckbi-1.82-0ubuntu4) but it is not going to be installed. Depends: libc6 (>= 2.11) but it is not going to be installed. Depends: libfreetype6 (>= 2.2.1) but it is not going to be installed. Depends: libgcc1 (>= 1:4.1.1) but it is not going to be installed. Depends: libstdc++6 (>= 4.1.1) but it is not going to be installed. Depends: zlib1g (>= 1:1.1.4) but it is not going to be installed. The following actions will resolve these dependencies: Keep the following packages at their current version: 1) default-jre-headless [Not Installed] 2) openjdk-6-jre-headless [Not Installed] Accept this solution? [Y/n/q/?] q Is aptitude not installing the 32-bit versions of the dependencies? What is the right way to do this? I'll likely want both a 64-bit and a 32-bit JRE if that matters.

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• apt-get broken + dependencies issue + many software uninstalled

  - by vnc786

  OS=ubuntu 12.04 64bit 3.2.0-29-generic what i did? apt-get purge libre* which i thought will remove LO 3.5 but, which was a big mistake after couple of moments, i realise that its is removing all other software so i did cltl-c which stopped the apt process i restarted my system after that i found that following software were missing apt-get,evince(pdf), cheese etc..here is full list http://pastebin.com/CWHrw10y i managed to install APT deb file through dpkg but now i am not able to do any installation so i just removed /var/lib/dpkg/status and created new but that didnt help apt-get -f install Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... Done The following extra packages will be installed: apt-utils coreutils debconf debconf-i18n dpkg libacl1 libapt-inst1.4 libapt-pkg4.12 libattr1 libbz2-1.0 libdb5.1 libgcc1 liblocale-gettext-perl liblzma5 libselinux1 libstdc++6 libtext-charwidth-perl libtext-iconv-perl libtext-wrapi18n-perl perl-base tar tzdata xz-utils zlib1g Suggested packages: debconf-doc debconf-utils whiptail dialog gnome-utils libterm-readline-gnu-perl libgtk2-perl libnet-ldap-perl libqtgui4-perl libqtcore4-perl apt bzip2 ncompress xz-lzma The following NEW packages will be installed: apt-utils coreutils debconf debconf-i18n dpkg libacl1 libapt-inst1.4 libapt-pkg4.12 libattr1 libbz2-1.0 libdb5.1 libgcc1 liblocale-gettext-perl liblzma5 libselinux1 libstdc++6 libtext-charwidth-perl libtext-iconv-perl libtext-wrapi18n-perl perl-base tar tzdata xz-utils zlib1g 0 upgraded, 24 newly installed, 0 to remove and 0 not upgraded. 2 not fully installed or removed. Need to get 0 B/9,246 kB of archives. After this operation, 29.9 MB of additional disk space will be used. Do you want to continue [Y/n]? y E: Cannot get debconf version. Is debconf installed? debconf: apt-extracttemplates failed: No such file or directory dpkg: regarding .../libgcc1_1%3a4.6.3-1ubuntu5_amd64.deb containing libgcc1, pre-dependency problem: libgcc1 pre-depends on multiarch-support multiarch-support is unpacked, but has never been configured. dpkg: error processing /var/cache/apt/archives/libgcc1_1%3a4.6.3-1ubuntu5_amd64.deb (--unpack): pre-dependency problem - not installing libgcc1 No apport report written because MaxReports is reached already Errors were encountered while processing: /var/cache/apt/archives/libgcc1_1%3a4.6.3-1ubuntu5_amd64.deb E: Internal Error, No file name for libc6 W: Could not perform immediate configuration on 'multiarch-support:amd64'. Please see man 5 apt.conf under APT::Immediate-Configure for details. (2) E: Sub-process /usr/bin/dpkg returned an error code (1) # apt-get -u dist-upgrade Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these. The following packages have unmet dependencies: libc6 : Depends: libgcc1 but it is not installed Depends: tzdata but it is not installed E: Unmet dependencies. Try using -f. i have tried below link Unable to install due to debconf problem How do I resolve unmet dependencies? but no help... thanks

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• SQL SERVER – BI Quiz Hint – Performance Tuning Cubes – Hints

  - by pinaldave

  I earlier wrote about SQL BI Quiz over here and here. The details of the quiz is here: Working with huge data is very common when it is about Data Warehousing. It is necessary to create Cubes on the data to make it meaningful and consumable. There are cases when retrieving the data from cube takes lots of the time. Let us assume that your cube is returning you data very quickly. Suddenly on one day it is returning the data very slowly. What are the three things will you to diagnose this. After diagnose what you will do to resolve performance issue. Participate in my question over here I required BI Expert Jason Thomas to help with few hints to blog readers. He is one of the leading SSAS expert and writes a complicated subject in simple words. If queries were executing properly before but now take a long time to return the data, it means that there has been a change in the environment in which it is running. Some possible changes are listed below:-  1) Data factors:- Compare the data size then and now. Increase in data can result in different execution times. Poorly written queries as well as poor design will not start showing issues till the data grows. How to find it out? (Ans : SQL Server profiler and Perfmon Counters can be used for identifying the issues and performance  tuning the MDX queries)  2) Internal Factors:- Is some slow MDX query / multiple mdx queries running at the same time, which was not running when you had tested it before? Is there any locking happening due to proactive caching or processing operations? Are the measure group caches being cleared by processing operations? (Ans : Again, profiler and perfmon counters will help in finding it out. Load testing can be done using AS Performance Workbench (http://asperfwb.codeplex.com/) by running multiple queries at once)  3) External factors:- Is some other application competing for the same resources?  HINT : Read “Identifying and Resolving MDX Query Performance Bottlenecks in SQL Server 2005 Analysis Services” (http://sqlcat.com/whitepapers/archive/2007/12/16/identifying-and-resolving-mdx-query-performance-bottlenecks-in-sql-server-2005-analysis-services.aspx) Well, these are great tips. Now win big prizes by participate in my question over here. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• Remote synchronization

  - by Tomas Mysik

  Hi all, today we would like to show you another improvement we have prepared for NetBeans 7.2. Today, let's talk a little bit about remote synchronization. If you already use our simple (S)FTP client, this enhancement could be useful for you. Simply right click on Source Files and select Synchronize. Please notice that the remote synchronization works better only on the whole project (it means that the Source Files must be selected). The Synchronize action is also available on individual files (more files can be selected at once) but the suggested operation (download, upload etc.) does not work so precisely. Also please notice that the suggested operations are not 100% reliable since the timestamps provided by FTP servers are not exact. Once the remote files (their names and paths only, of course) are fetched, the main dialog appears: As you can see, NetBeans tries to suggest you operations (upload, download etc.) which should be done for each individual file of your project. If you are interested only in some particular changes, you can simply filter the list: Since we have a file conflict, we need to resolve it first. Fortunately this is very easy because we just select the desired file and click the Diff button . The remote version of our file is downloaded and compared with the local version. The resut is displayed in the dialog where you can easily apply and/or refuse the remote changes or even simply type manually to the local version of the selected file: Once we are done with our changes, the operation for the selected file changes to Upload and the file is marked with * (since we made some changes). Please notice that if you now click the Cancel button, in fact no changes are done in our local file. As you can see, if we have one or more files selected, we can change their operation to: no operation (file won't be synchronized) download upload delete (both local and remote file) reset (the operation is resetted to the original one suggested by NetBeans and also all changes done via Diff action are discarded) Now we are ready to synchronize our project. NetBeans will show us the synchronization summary (this dialog can be omitted, see the Show Summary checkbox on the previous image). The synchronization itself starts and we can see its progress and of course its result. As always, all the operations can be reviewed in the Output window. That's all for today, as always, please test it and report all the issues or enhancements you find in NetBeans BugZilla (component php, subcomponent FTP support).

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• schedule compliance and keeping technical supports and resolving issues

  - by imays

  I am an entrepreneur of a small software developer company. The flagship product is developed by myself and my company grew up to 14 people. One of pride is that we've never have to be invested or loaned. The core development team is 5 people. 3 are seniors and 2 are juniors. After the first release, we've received many issues from our customers. Most of them are bug issues, customization needs, usage questions and upgrade requests. The issues from customers are incoming many times everyday, so it takes little time or much time of our developers. Because of our product is a software development kit(SDK) so most of questions can be answered only from our developers. And, for resolving bug issues, developers must be involved. Estimating time to resolve bug is hard. I fully understand it. However, our developers insist they cannot set the any due date of each project because they are busy doing technical supports and bug fixes by issues from customers everyday. Of course, they never do overwork. I suggested them an idea to divide the team into two parts: one for focusing on development by milestones, other for doing technical supports and bug fixes without setting due days. Then we could announce release plan officially. After the finish of release, two parts exchange the role for next milestone. However, they say they "NO, because it is impossible to share knowledge and design document fully." They still say they cannot set the release date and they request me to alter the due date flexibly. They does not fix the due date of each milestone. Fortunately, our company is not loaned and invested so we are not chocked. But I think it is bad idea to keep this situation. I know the story of ant and grasshopper. Our customers are tired of waiting forever of our release date. Companies consume limited time and money. If flexible due date without limit could be acceptable, could they accept flexible salary day? What is the root cause of our problem? All that I want is to fix and achieve precisely due date of each milestone without losing frequent technical supports. I think there must be solution for this situation. Please answer me. Thanks in advance. PS. Our tools and ways of project management are Trello, Mantis-like issue tracker, shared calendar software and scrum(collected cards into series of 'small and high completeness' projects).

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• Access forbidden 403 error in xampp

  - by Ramvignesh

  I am very new to xampp. I have made a fresh xampp install with the following commands. sudo su cd /tmp wget bit.ly/1cmyrUo -O xampp-32bit.run chmod 777 ./xampp-32bit.run sudo ./xampp-32bit.run Then I made a perl file to check whether my xampp works. The following is my sample.pl file content. #!usr/bin/perl print "content-type:text/html\n"; print(header()); use CGI qw(:standard); print(start_html()); print "Hello. I am ram"; print(end_html()); After copying my perl file from /home/vicky/desktop to /opt/lampp/cgi-bin. I started my xampp with the following command. /opt/lampp/lampp start Then I ran my sample.pl in the localhost with the help of the http://localhost/cgi-bin/sample.pl in my mozilla browser. I just got the following window. I found only answers relating to the 'new security concept error' and 'accessing virtual host issue'. I did came across an askubuntu query, a bid similar to that of mine. It had no answers but some comments. One comment suggested to change the file permissions. It directed to get help from here. It said to change the directory permission as 755 and file permission as 644 to resolve this kind of issue. When I tried to do that, I came to know that my cgi-bin directory already had 755 permission and my sample.pl had 644 permission. I have no solutions now. PostScript: I have attached the content of my /opt/lampp/apache2/conf/httpd.conf file. Hope this will help the answer-providers to understand my problem completely. Alias /bitnami/ "/opt/lampp/apache2/htdocs/" Alias /bitnami "/opt/lampp/apache2/htdocs" <Directory "/opt/lampp/apache2/htdocs"> Options Indexes FollowSymLinks AllowOverride All Order allow,deny Allow from all </Directory>

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• The Windows 8 and Ubuntu 12.04 Dual Boot NIghtmare

  - by Steve

  I have done some research as to how to go about this dual-boot, and I am close, but I need some guidance with booting into Windows 8 (Ubuntu is installed). I have a Lenovo Ideapad y510p. I will go over what I have done to dual-boot this laptop, with windows 8 pre-installed, with Ubuntu 12.04: I followed every instruction to the letter for the 97-vote response here, and everything worked fine up until after the repair boot section: Installing on a Pre-Installed Windows 8 System (UEFI Supported) I ran into the following error upon restarting after the repair boot section: error: invalid arch independent elf magic. This error (a grub issue) disabled me from booting into Ubuntu :( After a little googling, I followed the instructions in the reactivating grub 2 section to resolve the error: http://kb.acronis.com/content/1686 I found a possible solution to fixing the Windows 8 boot issue, and tried it: http://webcache.googleusercontent.com/search?q=cache:i9JMyXzzRpYJ:askubuntu.com/questions/279275/dual-boot-problem-windows-8-ubuntu-12-04+&cd=1&hl=en&ct=clnk&gl=us&client=ubuntu I thought the above solution worked, but when I attempt to boot into Windows 8, I get the following missing file error: File: \Boot\BCD Status: 0xc000000e Info: The Boot Configuration Data for your PC is missing or contains errors. Here is some other information that may be useful: I have 3 partitions devoted to Ubuntu. The first, sda8, has a flag bios_grub (1049 kb). The second, sda9, is where everything else is (96.6 GB). The last, sda10, is for swap (8299 MB). My question is: How do I fix the boot configuration for Windows 8? Any help would be greatly appreciated :) Update 1: When I attempt to boot into UEFI mode, I get the following error: invalid arch independent elf magic (the same error I saw in step 2). Update 2: A useful link here I found: Dual booting Ubuntu 12.04: UEFI and Legacy So, this is my 4th time installing Ubuntu on the laptop, and it looks like I need to install it in UEFI mode. Should I scrap it all again, and reinstall? Or is there ANY way of salvaging my installation? At this point, I can't even boot into Windows (although I have an installation cd to fix the windows boot issue, that would ultimately screw over ubuntu). Update 3: After doing a little more browsing around, I found a cool way around this messy grub stuff, using rEFInd. Rod Smith's post here saved me! Installing ubuntu 12.04.02 in uefi mode Now, I am able to dual-boot Windows 8 and Ubuntu and boot into both operating systems :) I have another issue (relating to the boot configuration in the bios) that I will post as a separate question :)

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• Does Your Customer Engagement Create an Ah Feeling?

  - by Richard Lefebvre

  An (Oracle CX Blog) article by Christina McKeon Companies that successfully engage customers all have one thing in common. They make it seem easy for the customer to get what they need. No one would argue that brands don’t want to leave customers with this “ah” feeling. Since 94% of customers who have a low-effort service experience will buy from that company again, it makes financial sense for brands.1 Some brands are thinking differently about how they engage their customers to create ah feelings. How do they do it? Toyota is a great example of using smart assistance technology to understand customer intent and answer questions before customers hit the submit button online. What is unique in this situation is that Toyota captures intent while customers are filling out email forms. Toyota analyzes the data in the form and suggests responses before the customer sends the email. The customer gets the right answer, and the email never makes it to your contact center — which makes you and the customer happy. Most brands are fully aware of chat as a service channel, but some brands take chat to a whole new level. Beauty.com, part of the drugstore.com and Walgreens family of brands, uses live chat to replicate the personal experience that one would find at high-end department store cosmetic counters. Trained beauty advisors, all with esthetician or beauty counter experience, engage in live chat sessions with online shoppers to share immediate advice on the best products for their personal needs. Agents can watch customer activity online and determine the right time to reach out and offer help, just as help would be offered in a brick-and-mortar store. And, agents can co-browse along with the customer helping customers with online check-out. These personal chat discussions also give Beauty.com the opportunity to present products, advertise promotions, and resolve customer issues when they arise. Beauty.com converts approximately 25% of chat sessions into product orders. Photobox, the European market leader in online photo services, wanted to deliver personal and responsive service to its 24 million members. It ensures customer inquiries on personalized photo products are routed based on agent knowledge so customers get what they need from the company experts. By using a queuing system to ensure that the agent with the most appropriate knowledge handles the query, agent productivity increased while response times to 1,500 customer queries per day decreased. A real-time dashboard prevents agents from being overloaded with queries. This approach has produced financial results with a 15% increase in sales to existing customers and a 45% increase in orders from newly referred customers.

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• Do you care about your Oracle System Support experience?

  - by user12244613

  It has been a while since I blogged about Systems Support within Oracle. I want to take this opportunity to raise awareness of how Oracle is communicating out to its systems customers. Previously every item to be communicated was sent independently via an email message however, not all messages appear to be being getting the attention they require. In an effort to ensure Oracle is reaching all of our Sun and Oracle System customers, we have created the Oracle Systems Support Newsletter. This monthly newsletter will have a summary of customer support relevant information for you to use and will cover topics that impact your support experience. For example: 1. Did you know that sending explorer content to email addresses with @sun.com is going away soon? For more information, review the Document 1362484.1 2. Are you an Auto Service Request (ASR) user? If yes, here are the latest changes: · ASR Manager accepts My Oracle Support User Name (email address) and password. [Doc ID 1345484.1] · ASR IP Address for secure file transfer has changed [Doc ID 1338575.1] · ASR No Heartbeat Status - Find out how to resolve [Doc ID 1346328.1] 3. Did you notice we have changed the Service Request options for Hardware and introduced a new problem category called “Automated Diagnosis”? This service streamlines the data you send in and then automatically provides an update of known issues found in your My Oracle Support Service Request. This feature also fast tracks hardware failures by sending parts as soon as the data is analyzed. Have you used this new feature? If yes tell us about it – take the 5minute survey 4. Are you being proactive or are you still ‘fire fighting’ in the reactive mode? If you are being proactive for your Oracle System products you might have used Oracle Sun System Analysis. Did you finding this helpful? Can we improve it? You tell us, take the 5minute survey 5. Are you aware that if you attach files to your Service Request it enables the support engineer to start work straight away? For a summary of products and files review the Newsletter. 6. Are you struggling to find patches or firmware or product downloads? If yes, these types of issues are all addressed in the Newsletter. If this is the type of information you want to know about each month, then take time to read the Newsletter link and bookmark it in My Oracle Support so you can stay informed. Thanks for your time.

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• Credentials Not Passed From SharePoint WebPart to WCF Service

  - by Jacob L. Adams

  I have spent several hours trying to resolve this problem, so I wanted to share my findings in case someone else might have the same problem. I had a web part which was calling out to a WCF service on another server to get some data. The code I had was essentially using System.ServiceModel; using System.ServiceModel.Channels; ... var binding = new CustomBinding( new HttpTransportBindingElement { AuthenticationScheme = System.Net.AuthenticationSchemes.Negotiate } ); var endpoint = new EndpointAddress(new Uri("http://someotherserver/someotherservice.svc")); var someOtherService = new SomeOtherServiceClient(binding, endpoint); string result = someOtherService.SomeServiceMethod(); This code would run fine on my local instance of SharePoint 2010 (Windows 7 64-bit). However, when I would deploy it to the testing environment, I would get a yellow screen of death  with the following message: The HTTP request is unauthorized with client authentication scheme 'Negotiate'. The authentication header received from the server was 'Negotiate,NTLM'. I then went through the usual checklist of Windows Authentication problems: Check WCF bindings to make sure authentication is set correctly Check IIS to make sure Windows Authentication is enabled and anonymous authentication was disabled. Check to make sure the SharePoint server trusted the server hosting the WCF service Verify that the account that the IIS application pool is running under has access to the other server I then spend lot of time digging into really obscure IIS, machine.config, and trust settings (as well of lots of time on Google and StackOverflow). Eventually I stumbled upon a blog post by Todd Bleeker describing how to run code under the application pool identity. Wait, what? The code is not already running under application pool identity? Another quick Google search led me to an MSDN page that imply that SharePoint indeed does not run under the app pool credentials by default. Instead SPSecurity.RunWithElevatedPrivileges is needed to run code under the app pool identity. Therefore, changing my code to the following worked seamlessly using System.ServiceModel; using System.ServiceModel.Channels; using Microsoft.SharePoint; ... var binding = new CustomBinding( new HttpTransportBindingElement { AuthenticationScheme = System.Net.AuthenticationSchemes.Negotiate } ); var endpoint = new EndpointAddress(new Uri("http://someotherserver/someotherservice.svc")); var someOtherService = new SomeOtherServiceClient(binding, endpoint); string result; SPSecurity.RunWithElevatedPrivileges(()=> { result = someOtherService.SomeServiceMethod(); });

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• How can I solve this SAT edge case?

  - by ssb

  I have an SAT implementation that basically works, and the fact that it works is what's giving me a few headaches. Basically there are some situations where using the SAT doesn't quite give me my intended result. One of these involves movement across multiple collision objects. Or to put it another way, if I have several collision boxes lined up next to each other such as to create something like a wall or a floor, movement along that surface while constantly applying force into that surface sometimes causes hangups, i.e. the player stops moving. This illustration shows what I mean: The 2 boxes on the bottom represent a floor, and the box on top/in the middle represents what my player is doing. There are several squares lined up as world obstacles to create some kind of wall, and if I move to the left across this surface while holding the down key then the issue arises. It only happens at the exact dividing point between two blocks. It only happens when moving to the left. At any rate I think I know why it happens, but I don't know how to solve it. Basically when I update my player movement I consider which directions are pressed, naturally, so if down is pressed I will add the speed to the Y component, and so on. But due to the way my SAT is implemented, when the penetration into the shape is the same from both sides it just goes with the smallest axis that it finds first, and it checks collisions against objects in the order that they were created because it goes through a foreach loop on the list of collidable objects. So this all adds up to the effect of if I'm moving to the left over a series of boxes while holding down, it will resolve me back to the right out of the first box and then up out of the box to the right of it, and this continues as long as the penetration is the same. The odd part is that this doesn't happen every time, which I am going to attribute to some oddity regarding multiplying velocity by the game time and causing some minor discrepancies between the lengths. Ultimately what this boils down to is that it will keep resolving me to the right and up, but this is technically expected behavior. All the solutions I can think of only address the symptoms of this problem and not the actual cause, such as not using many blocks to create walls or shapes, which is an option I'd like to keep open. I could also change which axis my algorithm defaults to, but that would just cause problems when going up/down along the walls. What can I do to fix this?

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• Failing report subscriptions

  - by DavidWimbush

  We had an interesting problem while I was on holiday. (Why doesn't this stuff ever happen when I'm there?) The sysadmin upgraded our Exchange server to Exchange 2010 and everone's subscriptions stopped. My Subscriptions showed an error message saying that the email address of one of the recipients is invalid. When you create a subscription, Reporting puts your Windows user name into the To field and most users have no permissions to edit it. By default, Reporting leaves it up to exchange to resolve that into an email address. This only works if Exchange is set up to translate aliases or 'short names' into email addresses. It turns out this leaves Exchange open to being used as a relay so it is disabled out of the box. You now have three options: Open up Exchange. That would be bad. Give all Reporting users the ability to edit the To field in a subscription. a) They shouldn't have to, it should just work. b) They don't really have any business subscribing anyone but themselves. Fix the report server to add the domain. This looks like the right choice and it works for us. See below for details. Pre-requisites: A single email domain name. A clear relationship between the Windows user name and the email address. eg. If the user name is joebloggs, then joebloggs@domainname needs to be the email address or an alias of it. Warning: Saving changes to the rsreportserver.config file will restart the Report Server service which effectively takes Reporting down for around 30 seconds. Time your action accordingly. Edit the file rsreportserver.config (most probably in the folder ..\Program Files[ (x86)]\Microsoft SQL Server\MSRS10_50[.instancename]\Reporting Services\ReportServer). There's a setting called DefaultHostName which is empty by default. Enter your email domain name without the leading '@'. Save the file. This domain name will be appended to any destination addresses that don't have a domain name of their own.

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• How do I configure sound with PulseAudio and Multiseat?

  - by Anthony

  In the spirit of full disclosure, i just posted this question to the ubuntu forums, but i figure more heads working on it couldn't hurt. I have a multi-seat setup working quite well. Hot plugging input devices works as expected and such. The only issue I am still not able to resolve is getting the audio for each seat. Here is a summary of my attempts at getting audio to work: Make ~/.pulse/default.pa dynamically configured based on which $DISPLAY the user logs in at. See this pastebin for the details. Load pulseaudio as a system-wide instance. Couldn't get this to work. None of the audio hardware was accessible to the users. Use udev rules to mark seats in ConsoleKit. Following udev guidelines found here: http://www.freedesktop.org/wiki/Software/systemd/multiseat I didn't think this would work, although it was "guaranteed" to work by someone in irc.freenode #pulseaudio None of those attempts yielded success, which is why I now turn to the community for help. It is quite possible that the suggested methods work and I just messed some aspect of it up, idk. This is the last piece of the puzzle which is needed before I can go and update the MultiseatX page to include instructions for Ubuntu 12.04. My understandings on the situation: Access to pulseaudio is restricted to the active session as marked by ConsoleKit (something about an ACL). CK can only mark one session as active at a time. This simple little fact of life leads me to believe that the solution should involve pulseaudio being run as a system-wide instance. Each user should connect to the pulse server and be limited to a subset of all the hardware. Maybe each user connects to the pulse server via localhost, idk. I do know that regardless of my attempts and their failed results, I was always able to use sudo aplay -D plughw:0,0 /usr/share/sounds/alsa/Front_Center.wav to play something to any of the hardware. I'm grasping at straws and am now down to the last few hairs i can pull out of my head. Please, help me figure this out so we can share the wealth. Any additional information needed will be provided at your request.

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• How to do geometric projection shadows?

  - by John Murdoch

  I have decided that since my game world is mostly flat I don't need better shadows than geometric projections - at least for now. The only problem is I don't even know how to do those properly - that is to produce a 4x4 matrix which would render shadows for my objects (that is, I guess, project them on a horizontal XZ plane). I would like a light source at infinity (e.g., the sun at some point in the sky) and thus parallel projection. My current code does something that looks almost right for small flying objects, but actually is a very rude approximation, as it doesn't project the objects onto the ground, but simply moves them there (I think). Also it always wrongly assumes the sun is always on the zenith (projecting straight down). Gdx.gl20.glEnable(GL10.GL_BLEND); Gdx.gl20.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA); //shells shellTexture.bind(); shader.begin(); for (ShellState state : shellStates.values()) { transform.set(camera.combined); transform.mul(state.transform); shader.setUniformMatrix("u_worldView", transform); shader.setUniformi("u_texture", 0); shellMesh.render(shader, GL10.GL_TRIANGLES); } shader.end(); // shadows shader.begin(); for (ShellState state : shellStates.values()) { transform.set(camera.combined); m4.set(state.transform); state.transform.getTranslation(v3); m4.translate(0, -v3.y + 0.5f, 0); // TODO HACK: + 0.5f is a hack to ensure the shadow appears above the ground; this is overall a hack as we are just moving the shell to the surface instead of projecting it on the surface! transform.mul(m4); shader.setUniformMatrix("u_worldView", transform); shader.setUniformi("u_texture", 0); // TODO: make shadow black somehow shellMesh.render(shader, GL10.GL_TRIANGLES); } shader.end(); Gdx.gl.glDisable(GL10.GL_BLEND); So my questions are: a) What is the proper way to produce a Matrix4 to pass to openGL which would render the shadows for my objects? b) I am supposed to use another fragment shader for the shadows which would paint them in semi-transparent grey, correct? c) The limitation of this simplistic approach is that whenever there is some object on the ground (it is not flat) the shadows will not be drawn, correct? d) Do I need to add something very small to the y (up) coordinate to avoid z-fighting with ground textures? Or is the fact they will be semi-transparent enough to resolve that problem?

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• Engine Rendering pipeline : Making shaders generic

  - by fakhir

  I am trying to make a 2D game engine using OpenGL ES 2.0 (iOS for now). I've written Application layer in Objective C and a separate self contained RendererGLES20 in C++. No GL specific call is made outside the renderer. It is working perfectly. But I have some design issues when using shaders. Each shader has its own unique attributes and uniforms that need to be set just before the main draw call (glDrawArrays in this case). For instance, in order to draw some geometry I would do: void RendererGLES20::render(Model * model) { // Set a bunch of uniforms glUniformMatrix4fv(.......); // Enable specific attributes, can be many glEnableVertexAttribArray(......); // Set a bunch of vertex attribute pointers: glVertexAttribPointer(positionSlot, 2, GL_FLOAT, GL_FALSE, stride, m->pCoords); // Now actually Draw the geometry glDrawArrays(GL_TRIANGLES, 0, m->vertexCount); // After drawing, disable any vertex attributes: glDisableVertexAttribArray(.......); } As you can see this code is extremely rigid. If I were to use another shader, say ripple effect, i would be needing to pass extra uniforms, vertex attribs etc. In other words I would have to change the RendererGLES20 render source code just to incorporate the new shader. Is there any way to make the shader object totally generic? Like What if I just want to change the shader object and not worry about game source re-compiling? Any way to make the renderer agnostic of uniforms and attributes etc?. Even though we need to pass data to uniforms, what is the best place to do that? Model class? Is the model class aware of shader specific uniforms and attributes? Following shows Actor class: class Actor : public ISceneNode { ModelController * model; AIController * AI; }; Model controller class: class ModelController { class IShader * shader; int textureId; vec4 tint; float alpha; struct Vertex * vertexArray; }; Shader class just contains the shader object, compiling and linking sub-routines etc. In Game Logic class I am actually rendering the object: void GameLogic::update(float dt) { IRenderer * renderer = g_application->GetRenderer(); Actor * a = GetActor(id); renderer->render(a->model); } Please note that even though Actor extends ISceneNode, I haven't started implementing SceneGraph yet. I will do that as soon as I resolve this issue. Any ideas how to improve this? Related design patterns etc? Thank you for reading the question.

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