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• Managing service references and endpoint configurations for Silverlight applications

  Youve written your service. Youve written your Silverlight application. You Add Service Reference to your application and got the client proxy code. Your app works on your machine and you push it out. FAIL. NotFound. Crap. You forgot that your service reference had your local URI endpoint in there and when you moved it to staging and/or production it failed. You start cursing Microsoft and the Silverlight team and add to the threads in the forums or perhaps initiate a new wishlist item for the...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Mapping SQL Server Features to Oracle Database

  Database administrators are often faced with the need to learn where features of his/her system live or reside on a less familiar system. Steve Callan approaches this need by mapping SQL Server features back into Oracle Database.

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• free Oracle Open World pass? Help us to clean the Ocean Beach!

  - by JuergenKress

  Volunteer for Coastal Cleanup; Receive a Complimentary Discover Pass Coastal Cleanup Day is California’s largest volunteer event and this year, you can help by joining Oracle employees and partners at the Ocean Beach cleanup in San Francisco. Participation earns you an Oracle T-shirt, the opportunity to sign up for an Oracle OpenWorld Discover Pass, and inclusion in the group photo that will be displayed on the Oracle OpenWorld and JavaOne Websites. When: September 15, 9 a.m. to 12:00 p.m. Where: San Francisco’s Ocean Beach To register and for more information, go to bitly.com/oceancleanup

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• Adding multiple data importers support to web applications

  - by DigiMortal

  I’m building web application for customer and there is requirement that users must be able to import data in different formats. Today we will support XLSX and ODF as import formats and some other formats are waiting. I wanted to be able to add new importers on the fly so I don’t have to deploy web application again when I add new importer or change some existing one. In this posting I will show you how to build generic importers support to your web application. Importer interface All importers we use must have something in common so we can easily detect them. To keep things simple I will use interface here. public interface IMyImporter {     string[] SupportedFileExtensions { get; }     ImportResult Import(Stream fileStream, string fileExtension); } Our interface has the following members: SupportedFileExtensions – string array of file extensions that importer supports. This property helps us find out what import formats are available and which importer to use with given format. Import – method that does the actual importing work. Besides file we give in as stream we also give file extension so importer can decide how to handle the file. It is enough to get started. When building real importers I am sure you will switch over to abstract base class. Importer class Here is sample importer that imports data from Excel and Word documents. Importer class with no implementation details looks like this: public class MyOpenXmlImporter : IMyImporter {     public string[] SupportedFileExtensions     {         get { return new[] { "xlsx", "docx" }; }     }     public ImportResult Import(Stream fileStream, string extension)     {         // ...     } } Finding supported import formats in web application Now we have importers created and it’s time to add them to web application. Usually we have one page or ASP.NET MVC controller where we need importers. To this page or controller we add the following method that uses reflection to find all classes that implement our IMyImporter interface. private static string[] GetImporterFileExtensions() {     var types = from a in AppDomain.CurrentDomain.GetAssemblies()                 from t in a.GetTypes()                 where t.GetInterfaces().Contains(typeof(IMyImporter))                 select t;       var extensions = new Collection<string>();     foreach (var type in types)     {         var instance = (IMyImporter)type.InvokeMember(null,                        BindingFlags.CreateInstance, null, null, null);           foreach (var extension in instance.SupportedFileExtensions)         {             if (extensions.Contains(extension))                 continue;               extensions.Add(extension);         }     }       return extensions.ToArray(); } This code doesn’t look nice and is far from optimal but it works for us now. It is possible to improve performance of web application if we cache extensions and their corresponding types to some static dictionary. We have to fill it only once because our application is restarted when something changes in bin folder. Finding importer by extension When user uploads file we need to detect the extension of file and find the importer that supports given extension. We add another method to our page or controller that uses reflection to return us importer instance or null if extension is not supported. private static IMyImporter GetImporterForExtension(string extensionToFind) {     var types = from a in AppDomain.CurrentDomain.GetAssemblies()                 from t in a.GetTypes()                 where t.GetInterfaces().Contains(typeof(IMyImporter))                 select t;     foreach (var type in types)     {         var instance = (IMyImporter)type.InvokeMember(null,                        BindingFlags.CreateInstance, null, null, null);           if (instance.SupportedFileExtensions.Contains(extensionToFind))         {             return instance;         }     }       return null; } Here is example ASP.NET MVC controller action that accepts uploaded file, finds importer that can handle file and imports data. Again, this is sample code I kept minimal to better illustrate how things work. public ActionResult Import(MyImporterModel model) {     var file = Request.Files[0];     var extension = Path.GetExtension(file.FileName).ToLower();     var importer = GetImporterForExtension(extension.Substring(1));     var result = importer.Import(file.InputStream, extension);     if (result.Errors.Count > 0)     {         foreach (var error in result.Errors)             ModelState.AddModelError("file", error);           return Import();     }     return RedirectToAction("Index"); } Conclusion That’s it. Using couple of ugly methods and one simple interface we were able to add importers support to our web application. Example code here is not perfect but it works. It is possible to cache mappings between file extensions and importer types to some static variable because changing of these mappings means that something is changed in bin folder of web application and web application is restarted in this case anyway.

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• Disaster Recovery - VMs

  - by Saresh

  Procedures for backing up and recovering VMs in case of a disaster The Exalytics admin guide is available here: http://docs.oracle.com/cd/E41246_01/bi.1/e39709/toc.htm, but the chapters around backup and recovery are pretty thin. This whitepaper isnt specifically for Exalytics, but plenty of good stuff around OVM backup and recovery that should get the you going http://www.oracle.com/technetwork/server-storage/vm/ovm3-backup-recovery-1997244.pdf

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• How to create a JMS durable subscriber in WebLogic Server?

  - by lmestre

  WebLogic Server Provides a set of examples that are very helpful to get started with Weblogic ServerHere you can check how to install the examples:http://docs.oracle.com/cd/E23943_01/doc.1111/e14142/prepare.htmAfter you have installed the examples, you can find the example you want to review, in this case TopicReceive, here:wlserver_10.3/samples/server/examples/src/examples/jms/topicTo review details of the specific example, you can open:wlserver_10.3/samples/server/examples/src/examples/jms/topic/instructions.htmlTo create a Durable Subscriber, you can just set the client ID  and invoke createDurableSubscriber instead of calling createSubscriber, i.e.:    tconFactory = (TopicConnectionFactory)       PortableRemoteObject.narrow(ctx.lookup(JMS_FACTORY),                                   TopicConnectionFactory.class);    tcon = tconFactory.createTopicConnection();    //Set Client ID for this Durable Subscriber    tcon.setClientID("GT2");    tsession = tcon.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);    topic = (Topic)       PortableRemoteObject.narrow(ctx.lookup(topicName),                                   Topic.class);    // Create Durable Subscription    tsubscriber = tsession.createDurableSubscriber(topic, "Test");    tsubscriber.setMessageListener(this);    tcon.start(); Enjoy!   You can read more about this here:http://docs.oracle.com/cd/E23943_01/web.1111/e13727/advpubsub.htm#CHDEBABChttp://docs.oracle.com/cd/E23943_01/web.1111/e13727/manage_apps.htm#i1097671    http://docs.oracle.com/cd/E23943_01/apirefs.1111/e13943/WebLogic.Messaging.ISession.CreateDurableSubscriber_overload_2.html

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• Building Secure ASP.NET Applications (Authentication, Authorization, Impersonation)

  This article provides guidance to help you develop an appropriate authentication and authorization strategy for your particular application scenario.

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• Building Secure ASP.NET Applications (Authentication, Authorization, Impersonation)

  This article provides guidance to help you develop an appropriate authentication and authorization strategy for your particular application scenario.

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• Unable to install applications (Oneiric)

  - by yayu

  When I use the software center to install something, I get the error: An unhandlable error occured There seems to be a programming error in aptdaemon, the software that allows you to install/remove software and to perform other package management related tasks on using the command line: $sudo apt-get install <something> E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem. I am unable to install anything. How do we fix this?

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• Build Web applications with HTML 5

  <b>IBM Developerworks:</b> "In this article, learn how to detect which capabilities are present and how to take advantage of those features in your application. Explore powerful HTML 5 features such as multi-threading, geolocation, embedded databases, and embedded video."

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• GillSans font doesn't show up in any applications

  - by roboknight

  I am running Ubuntu 10.04, Lucid Lynx, and I'm trying to add some fonts for use with Libre Office. In particular, I've placed a GillSans.ttc font file into /usr/share/fonts/truetype by copying it there with: sudo cp GillSans.ttc /usr/share/fonts/truetype and then attempting to "install" it by updating the font cache: sudo fc-cache -fv That appears to complete successfully, however, the font never seems to be available to either Libre Office, nor fontmatrix. In addition, I tried adding the font to my .fonts directory, thinking that I was somehow seeing a cache of just user supplied fonts, but that isn't the case. The file is a .ttc file, is there some other tools I need to use to extract each font from the .ttc, or is there something else I must do to use a .ttc? Nothing appears to have any issue with the file, but it could be silently failing to do anything. I've looked for the answer in other places, but the only time that a similar question was asked, it did not appear to be answered, so I figured I would ask the question differently and see if anyone else might be able to clue me in on how to use a .ttc font file, if that is possible. A related question, are there any tools to see what font families/font names are contained within a .ttc font file?

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• GlassFish Server 3.1 est disponible, avec des améliorations pour l'administration, la haute disponibilité et le développement d'applications

  GlassFish Server 3.1 est disponible Avec des améliorations pour l'administration, le développement d'applications et la haute disponibilité et Oracle vient d'annoncer la disponibilité de son serveur d'applications Java, GlassFish server 3.1. GlassFish Server 3.1 présente des améliorations pour le développement des applications, l'administration centralisée et la haute disponibilité. Cette version permet à Oracle de respecter sa feuille de route présentée lors de la conférence JavaOne 2010 : « avec cette version, Oracle respecte la feuille de route qu'il a annoncé et répond ainsi à la demande croissante pour Oracle GlassFish Server en ajoutant de nouvelles fonctionnalités pour ...

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• Cannot get script to run at startup (tried all the simple answers)

  - by Carey Head

  I have Ubuntu Desktop 12.04 LTS running great on an older Acer desktop. I want to use this machine as an in-home server for hosting Minecraft. The command to start the Minecraft server is java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui and that works great when I cd into the correct directory and execute the above. I created a script to do this: #!/bin/bash cd /home/myuser/minecraft-server1 java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui & cd /home/myuser/minecraft-server2 java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui & exit 0 I made this .sh file executable, and it too runs great when I start it manually from the terminal. The problem I'm having is getting these to execute at startup. I have my user account on this machine to auto login. I have tried the following: Adding the following to "Startup Applications" : sh /home/myuser/myscript.sh (Nothing happens on reboot) Adding the same to /etc/rc.local (Nothing happens on reboot). I even tested this one by running /etc/rc.local from the terminal, and it executed great. Just not at boot/auto login Added the lines from the script directly to rc.local (Nothing happens on reboot). I can't help but think that there's something I'm missing. The script executes great when run manually, but will not run at boot/auto login. Many thanks in advance.

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• OrangeScape makes Google App Engine ready for business applications

  This post is part of the Who's @ Google I/O , a series of blog posts that give a closer look at developers who'll be speaking or demoing...

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• How to build completely modular web applications

  - by Webnet

  In the coming months we're going to begin a project where we take a system we've built for a client (v1) and rebuild it from scratch. Our goal with v2 is to make it modular, so that this specific client will have their own set of modules they use, then another client may use a different set of modules altogether. The trick here is that Company A might have a series of checkout and user modules that change how that system works. Company B might stick with the standard checkout procedure but customize how products are browsed. What are some good approaches to application architecture when you're building an application from scratch that you want to have a Core that's shared among all clients while still maintaining the flexability for anything to be modified specifically for a client? I've seen CodeIgniter's hooks and don't think that's a good solution as we could end up with 250 hooks and it's still not flexible enough. What are some other solutions? Ideally we won't need to draw a line in the sand.

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• Internet TV streaming applications

  - by mark kirby

  Are there any programs for Ubuntu that can pull TV streams from the Internet ? For example like on a blu-ray player you get BBC iplayer and hulu and youtube as apps, so is there an application that can do this ? I know XMBC can but its to fiddly and resource hungry, I just want the net TV apps and not the full media center. Boxee was great for this, it was a media center but had an interface for the apps not just sticking them in some strange menu like XBMC. Please let me know of anything you know of

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• Allowing applications to play nice(r) with each other: Handling remote control buttons

  [This post is by Jean-Michel Trivi, an engineer working on the Android Media framework, whose T-shirt of the day reads “all your media buttons are belong to you...

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• Real Time Search and Applications

  Several companies want to improve their real time search practice. The most popular search engine Google also has plans to improvise on this area and has launched a real time search. But what exactly does this buzzword mean?

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• Oracle Solaris 11.1 Now Available; Learn More About It at November 7th Webcast

  - by Larry Wake

  Oracle Solaris 11.1 is now available for download -- as detailed earlier, this update to Oracle Solaris 11.1 provides new enhancements for enterprise cloud computing. Security, network, and provisioning advances, in addition to significant new performance features, make an already great release even better. For more information, you can't do better than the upcoming launch event webcast, featuring a live Q&A with Solaris engineering experts and three sessions covering what's new with Oracle Solaris 11.1 and Oracle Solaris Cluster. It's on Wednesday, November 7, at 8 AM PT; register today.

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• Using XNA libraries in your Silverlight Windows Phone 7 applications

  I recently got an inquiry to my Microsoft Translator sample on if this would work with the Silverlight in the Windows Phone 7 SDK. I hadnt tried it before, so I created a sample Windows Phone 7 application and copied the code over. I used a basic UI to mock up the similarities: And then clicked the button. The text translated fine, but no audio. I didnt get any warnings that the WaveMSS code sample I was using wouldnt work. Then I remembered about XNA. NOTE: I actually think this is a bug...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• communication network applications in Ubuntu 12.04

  - by soporte.cs

  I have installed edubuntu on 2 computers that are networked. I installed an educational software to keep track of the teams (one student and one teacher) but the teacher software is not any student team, as I have indicated in the product support should be enabled for proper telnet performance but despite being able to telnet between computers not get it to work. I wonder which options should be active in ubuntu for this type of software to operate smoothly. Thank you.

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• Most common Apache and PHP configuration for portable Web Applications

  - by Mahan

  I always create web application using PHP but I always distribute and deploy my works to different kinds of server platforms and web server configurations. Thus I always encounter problems in deployment because some features are enabled and others are disabled. And my question, is there a standard web server configuration that is commonly used by most of web servers worldwide? covering the aspects of reliability, security and maintainability?

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• XDIME for Mobile Applications

  - by Carlos Gavidia

  I'm involved in a project that requires to mobile-enable some previously developed Portlets. The Portlets are deployed in WebSphere Portal, and the container offers a technology called IBM Mobile Portal Accelerator that uses XDIME to render mobile pages according to the device. I'm trying to document myself in the technology and I'm having a bad time: Google only shows some outdated sites from IBM and even older posts from Volantis, another company involved in the technology (Amazon shows no related books). So... what's the current status of that technology actually? Is has some decent level of adoption?

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• How to install new system (with new applications) without removing /home

  - by Innuendo

  I'd like to update to 11.04 from 10.10 (but I don't like upgrading system, I prefer full reinstalling) I'd like to install whole new system, but I want to keep my /home folders (Music, Movies, Documents and so on). If I keep /home while installing - this will keep all my program settings too (but I have lots of trash there too, and 'd like to clean it too). Can I delete all .folders in /home and then reinstall system (keeping old /home) ?

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• Transparent menus(for applications) in gnome shell

  - by mac

  How do I make menus look transparent in Gnome-shell? In unity, I use ubuntu-tweak to do this(In ubuntu tweak , Go to Desktop-Compiz settings and then select Enable transparent menus option). Since compiz is no longer being used in gnome-shell, this is not working any more . Any alternatives ? I love gnome-shell but I am still missing some awesome features of compiz like "wobbly windows" and other desktop effects!

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