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• migration from jboss4.0.5GA to jboss5.1.0 GA

  - by rahul c

  Hi, Currently we have migrated from jboss4.0.5GA to jboss5.1.0 GA.Our application runs under jboss4.0.5GA well.The reason for migration to enable web service. I cann't find a way to create a web service on jboss 4.0.5 GA. while running on jboss 5.1.0 GA with jbossws-cxf-3.2.1.GA installed on it. i got following error 18:53:43,699 INFO [STDOUT] 2009-11-30 18:53:43,699 INFO org.springframework.core.CollectionFactory - JDK 1.4+ collections available 18:53:43,700 INFO [STDOUT] 2009-11-30 18:53:43,700 INFO org.springframework.core.CollectionFactory - Commons Collections 3.x available 18:53:43,973 INFO [STDOUT] 2009-11-30 18:53:43,972 INFO org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from ServletContext resource [/WEB-INF/applicationContext.xml] 18:53:44,308 INFO [STDOUT] 2009-11-30 18:53:44,302 ERROR org.springframework.web.context.ContextLoader - Context initialization failed org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from ServletContext resource [/WEB-INF/applicationContext.xml]; nested exception is java.lang.IllegalArgumentException: Class [org.apache.cxf.transport.http_jetty.spring.NamespaceHandler] does not implement the NamespaceHandler interface Caused by: java.lang.IllegalArgumentException: Class [org.apache.cxf.transport.http_jetty.spring.NamespaceHandler] does not implement the NamespaceHandler interface at org.springframework.beans.factory.xml.DefaultNamespaceHandlerResolver.initHandlerMappings(DefaultNamespaceHandlerResolver.java:119) at org.springframework.beans.factory.xml.DefaultNamespaceHandlerResolver.(DefaultNamespaceHandlerResolver.java:96) at org.springframework.beans.factory.xml.DefaultNamespaceHandlerResolver.(DefaultNamespaceHandlerResolver.java:82) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.createDefaultNamespaceHandlerResolver(XmlBeanDefinitionReader.java:526) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.createReaderContext(XmlBeanDefinitionReader.java:515) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:495) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:340) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:317) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:125) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:141) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:123) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:91) at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:94) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:292) at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:156) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:246) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:184) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:49) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3910) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4393) at org.jboss.web.tomcat.service.deployers.TomcatDeployment.performDeployInternal(TomcatDeployment.java:310) at org.jboss.web.tomcat.service.deployers.TomcatDeployment.performDeploy(TomcatDeployment.java:142) at org.jboss.web.deployers.AbstractWarDeployment.start(AbstractWarDeployment.java:461) at org.jboss.web.deployers.WebModule.startModule(WebModule.java:118) at org.jboss.web.deployers.WebModule.start(WebModule.java:97) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:157) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96) at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668) at org.jboss.system.microcontainer.ServiceProxy.invoke(ServiceProxy.java:206) at $Proxy38.start(Unknown Source) at org.jboss.system.microcontainer.StartStopLifecycleAction.installAction(StartStopLifecycleAction.java:42) at org.jboss.system.microcontainer.StartStopLifecycleAction.installAction(StartStopLifecycleAction.java:37) at org.jboss.dependency.plugins.action.SimpleControllerContextAction.simpleInstallAction(SimpleControllerContextAction.java:62) at org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:71) at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51) at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348) at org.jboss.system.microcontainer.ServiceControllerContext.install(ServiceControllerContext.java:286) at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631) at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934) at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082) at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984) at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822) at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553) at org.jboss.system.ServiceController.doChange(ServiceController.java:688) at org.jboss.system.ServiceController.start(ServiceController.java:460) at org.jboss.system.deployers.ServiceDeployer.start(ServiceDeployer.java:163) at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:99) at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:46) at org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.internalDeploy(AbstractSimpleRealDeployer.java:62) at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:50) at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:171) at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1439) at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1157) at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1178) at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1098) at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348) at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631) at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934) at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082) at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984) at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822) at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553) at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:781) at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:702) at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.process(MainDeployerAdapter.java:117) at org.jboss.system.server.profileservice.repository.ProfileDeployAction.install(ProfileDeployAction.java:70) at org.jboss.system.server.profileservice.repository.AbstractProfileAction.install(AbstractProfileAction.java:53) at org.jboss.system.server.profileservice.repository.AbstractProfileService.install(AbstractProfileService.java:361) at org.jboss.dependency.plugins.AbstractControllerContext. 18:53:44,313 INFO [STDOUT] install(AbstractControllerContext.java:348) at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631) at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934) at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082) at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984) at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822) at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553) at org.jboss.system.server.profileservice.repository.AbstractProfileService.activateProfile(AbstractProfileService.java:306) at org.jboss.system.server.profileservice.ProfileServiceBootstrap.start(ProfileServiceBootstrap.java:271) at org.jboss.bootstrap.AbstractServerImpl.start(AbstractServerImpl.java:461) at org.jboss.Main.boot(Main.java:221) at org.jboss.Main$1.run(Main.java:556) at java.lang.Thread.run(Thread.java:619) 18:53:44,315 ERROR [[/smartLMS]] Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from ServletContext resource [/WEB-INF/applicationContext.xml]; nested exception is java.lang.IllegalArgumentException: Class [org.apache.cxf.transport.http_jetty.spring.NamespaceHandler] does not implement the NamespaceHandler interface Caused by: java.lang.IllegalArgumentException: Class [org.apache.cxf.transport.http_jetty.spring.NamespaceHandler] does not implement the NamespaceHandler interface at org.springframework.beans.factory.xml.DefaultNamespaceHandlerResolver.initHandlerMappings(DefaultNamespaceHandlerResolver.java:119) at org.springframework.beans.factory.xml.DefaultNamespaceHandlerResolver.(DefaultNamespaceHandlerResolver.java:96) at org.springframework.beans.factory.xml.DefaultNamespaceHandlerResolver.(DefaultNamespaceHandlerResolver.java:82) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.createDefaultNamespaceHandlerResolver(XmlBeanDefinitionReader.java:526) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.createReaderContext(XmlBeanDefinitionReader.java:515) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:495) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:340) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:317) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:125) at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:141) at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:123) Thanks, Rahul.

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• What markup languages are good for programming articles/tutorials?

  - by Vilx-

  I very much wish to write a programming tutorial in my native language (Latvian). There are far too few of those. I am however unsure on what markup language to use for writing it. Here are a few things I would like to achieve: The same source can be compiled to both HTML for online viewing and printed form (PDF?). In HTML form it would allow superior interaction and appearance (see below), while the print form would look good on paper (layout etc). I have the idea that the tutorial could be multi-language. Different students have different requirements in their schools. For example, some schools teach Java, some teach C#. You could choose the language on the top of the HTML page and the relevant code snippets (and occasionally pieces of text) would swap out. Most of the text is the same anyway, only the language syntax is a bit different. The text would occasionally contain images too of course and these would need to be included in both the HTML and the printed version In the HTML version the code snippets should get automatic syntax coloring which should ideally be the same as in the recommended IDE for the tutorial. In case there are ambiguities, hints for the syntax colorer should be possible, but I don't want to do the whole coloring by hand. "Output" syntax coloring which would emulate a standard 80x25 text console (since many of the initial programs would be console applicatioins) Collapsible sections for answers to questions (aka "spoiler tags") Automatically generated index/table-of-contents Links to other parts of the tutorial (rendered as links in HTML and as references in print version) "Side note" sections, rendered as separate blocks on the side. Other functions useful in publications that I'm not aware of :) I know this is a bit much to ask, but is there something close enough that I could take it as a starting point and add the necessary features myself? Or is there something in the whole list (like the desire to have both HTML and print versions from the same source) that makes it all fundametally infeasible?

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• Summary of Oracle E-Business Suite Technology Webcasts and Training

  - by BillSawyer

  Last Updated: November 16, 2011We're glad to hear that you've been finding our ATG Live Webcast series to be useful.  If you missed a webcast, you can download the presentation materials and listen to the recordings below. We're collecting other learning-related materials right now.  We'll update this summary with pointers to new training resources on an ongoing basis.  ATG Live Webcast Replays All of the ATG Live Webcasts are hosted by the Oracle University Knowledge Center.  In order to access the replays, you will need a free Oracle.com account. You can register for an Oracle.com account here.If you are a first-time OUKC user, you will have to accept the Terms of Use. Sign-in with your Oracle.com account, or if you don't already have one, use the link provided on the sign-in screen to create an account. After signing in, accept the Terms of Use. Upon completion of these steps, you will be directed to the replay. You only need to accept the Terms of Use once. Your acceptance will be noted on your account for all future OUKC replays and event registrations. 1. E-Business Suite R12 Oracle Application Framework (OAF) Rich User Interface Enhancements (Presentation) Prabodh Ambale (Senior Manager, ATG Development) and Gustavo Jiminez (Development Manager, ATG Development) offer a comprehensive review of the latest user interface enhancements and updates to OA Framework in EBS 12.  The webcast provides a detailed look at new features designed to enhance usability, including new capabilities for personalization and extensions, and features that support the use of dashboards and web services. (January 2011) 2. E-Business Suite R12 Service Oriented Architectures (SOA) Using the E-Business Suite Adapter (Presentation, Viewlet) Neeraj Chauhan (Product Manager, ATG Development) reviews the Service Oriented Architecture (SOA) capabilities within E-Business Suite 12, focussing on using the E-Business Suite Adapter to integrate EBS with third-party applications via web services, and orchestrate services and distributed transactions across disparate applications. (February 2011) 3. Deploying Oracle VM Templates for Oracle E-Business Suite and Oracle PeopleSoft Enterprise Applications Ivo Dujmovic (Director, ATG Development) reviews the latest capabilities for using Oracle VM to deploy virtualized EBS database and application tier instances using prebuilt EBS templates, wire those virtualized instances together using the EBS virtualization kit, and take advantage of live migration of user sessions between failing application tier nodes.  (February 2011) 4. How to Reduce Total Cost of Ownership (TCO) Using Oracle E-Business Suite Management Packs (Presentation) Angelo Rosado (Product Manager, ATG Development) provides an overview of how EBS sysadmins can make their lives easier with the Management Packs for Oracle E-Business Suite Release 12.  This session highlights key features in Application Management Pack (AMP) and Application Change Management Pack) that can automate or streamline system configurations, monitor EBS performance and uptime, keep multiple EBS environments in sync with patches and configurations, and create patches for your own EBS customizations and apply them with Oracle's own patching tools.  (June 2011) 5. Upgrading E-Business Suite 11i Customizations to R12 (Presentation) Sara Woodhull (Principal Product Manager, ATG Development) provides an overview of how E-Business Suite developers can manage and upgrade existing EBS 11i customizations to R12.  Sara covers methods for comparing customizations between Release 11i and 12, managing common customization types, managing deprecated technologies, and more. (July 2011) 6. Tuning All Layers of E-Business Suite (Part 1 of 3) (Presentation) Lester Gutierrez, Senior Architect, and Deepak Bhatnagar, Senior Manager, from the E-Business Suite Application Performance team, lead Tuning All Layers of E-Business Suite (Part 1 of 3). This webcast provides an overview of how Oracle E-Business Suite system administrators, DBAs, developers, and implementers can improve E-Business Suite performance by following a performance tuning framework. Part 1 focuses on the performance triage approach, tuning applications modules, upgrade performance best practices, and tuning the database tier. This ATG Live Webcast is an expansion of the performance sessions at conferences that are perennial favourites with hardcore Apps DBAs. (August 2011)  7. Oracle E-Business Suite Directions: Deployment and System Administration (Presentation) Max Arderius, Manager Applications Technology Group, and Ivo Dujmovic, Director Applications Technology group, lead Oracle E-Business Suite Directions: Deployment and System Administration covering important changes in E-Business Suite R12.2. The changes discussed in this presentation include Oracle E-Business Suite architecture, installation, upgrade, WebLogic Server integration, online patching, and cloning. This webcast provides an overview of how Oracle E-Business Suite system administrators, DBAs, developers, and implementers can prepare themselves for these changes in R12.2 of Oracle E-Business Suite. (October 2011) Oracle University Courses For a general listing of all Oracle University courses related to E-Business Suite Technology, use the Oracle University E-Business Suite Technology course catalog link. Oracle University E-Business Suite Technology Course Catalog 1. R12 Oracle Applications System Administrator Fundamentals In this course students learn concepts and functions that are critical to the System Administrator role in implementing and managing the Oracle E-Business Suite. Topics covered include configuring security and user management, configuring flexfields, managing concurrent processing, and setting up other essential features such as profile options and printing. In addition, configuration and maintenance of an Oracle E-Business Suite through Oracle Applications Manager is discussed. Students also learn the fundamentals of Oracle Workflow including its setup. The System Administrator Fundamentals course provides the foundation needed to effectively control security and ensure smooth operations for an E-Business Suite installation. Demonstrations and hands-on practice reinforce the fundamental concepts of configuring an Oracle E-Business Suite, as well as handling day-to-day system administrator tasks. 2. R12.x Install/Patch/Maintain Oracle E-Business Suite This course will be applicable for customers who have implemented Oracle E-Business Suite Release 12 or Oracle E-Business Suite 12.1. This course explains how to go about installing and maintaining an Oracle E-Business Suite Release 12.x system. Both Standard and Express installation types are covered in detail. Maintenance topics include a detailed examination of the standard tools and utilities, and an in-depth look at patching an Oracle E-Business Suite system. After this course, students will be able to make informed decisions about how to install an Oracle E-Business Suite system that meets their specific requirements, and how to maintain the system afterwards. The extensive hands-on practices include performing an installation on a Linux system, navigating the file system to locate key files, running the standard maintenance tools and utilities, applying patches, and carrying out cloning operations. 3. R12.x Extend Oracle Applications: Building OA Framework Applications This class is a hands-on lab-intensive course that will keep the student busy and active for the duration of the course. While the course covers the fundamentals that support OA Framework-based applications, the course is really an exercise in J2EE programming. Over the duration of the course, the student will create an OA Framework-based application that selects, inserts, updates, and deletes data from a R12 Oracle Applications instance. 4. R12.x Extend Oracle Applications: Customizing OA Framework Applications This course has been significantly changed from the prior version to include additional deployments. The course doesn't teach the specifics of configuration of each product. That is left to the product-specific courses. What the course does cover is the general methods of building, personalizing, and extending OA Framework-based pages within the E-Business Suite. Additionally, the course covers the methods to deploy those types of customizations. The course doesn't include discussion of the Oracle Forms-based pages within the E-Business Suite. 5. R12.x Extend Oracle Applications: OA Framework Personalizations Personalization is the ability within an E-Business Suite instance to make changes to the look and behavior of OA Framework-based pages without programming. And, personalizations are likely to survive patches and upgrades, increasing their utility. This course will systematically walk you through the myriad of personalization options, starting with simple examples and increasing in complexity from there. 6. E-Business Suite: BI Publisher 5.6.3 for Developers Starting with the basic concepts, architecture, and underlying standards of Oracle XML Publisher, this course will lead a student through a progress of exercises building their expertise. By the end of the course, the student should be able to create Oracle XML Publisher RTF templates and data templates. They should also be able to deploy and maintain a BI Publisher report in an E-Business Suite instance. Students will also be introduced to Oracle BI Publisher Enterprise. 7. R12.x Implement Oracle Workflow This course provides an overview of the architecture and features of Oracle Workflow and the benefits of using Oracle Workflow in an e-business environment. You can learn how to design workflow processes to automate and streamline business processes, and how to define event subscriptions to perform processing triggered by business events. Students also learn how to respond to workflow notifications, how to administer and monitor workflow processes, and what setup steps are required for Oracle Workflow. Demonstrations and hands-on practice reinforce the fundamental concepts. 8. R12.x Oracle E-Business Suite Essentials for Implementers Oracle R12.1 E-Business Essentials for Implementers is a course that provides a functional foundation for any E-Business Suite Fundamentals course.

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• Oracle Coherence & Oracle Service Bus: REST API Integration

  - by Nino Guarnacci

  This post aims to highlight one of the features found in Oracle Coherence which allows it to be easily added and integrated inside a wider variety of projects.  The features in question are the REST API exposed by the Coherence nodes, with which you can interact in the wider mode in memory data grid.Oracle Coherence and Oracle Service Bus are natively integrated through a feature found in the Oracle Service Bus, which allows you to use the coherence grid cache during the configuration phase of a business service. This feature allows you to use an intermediate layer of cache to retrieve the answers from previous invocations of the same service, without necessarily having to invoke the real business service again. Directly from the web console of Oracle Service Bus, you can decide the policies of eviction of the objects / answers and define the discriminating parameters that identify their uniqueness.The coherence REST APIs, however, allow you to integrate both products for other necessities enabling realization of new architectures design.  Consider coherence’s node as a simple service which interoperates through the stardard services and in particular REST (with JSON and XML). Thinking of coherence as a company’s shared service, able to have an implementation of a centralized “map and reduce” which you can access  by a huge variety of protocols (transport and envelopes).An amazing step forward for those who still imagine connectors and code. This type of integration does not require writing custom code or complex implementation to be self-supported. The added value is made unique by the incredible value of both products independently, and still more out of their simple and robust integration.As already mentioned this scenario discovers a hidden new door behind the columns of these two products. The door leads to new ideas and perspectives for enterprise architectures that increasingly wink to next-generation applications: simple and dynamic, perhaps towards the mobile and web 2.0.Below, a small and simple demo useful to demonstrate how easily is to integrate these two products using the Coherence REST API. This demo is also intended to imagine new enterprise architectures using this approach.The idea is to create a centralized system of alerting, fed easily from any company’s application, regardless of the technology with which they were built . Then use a representation standard protocol: RSS, using a service exposed by the service bus; So you can browse and search only the alerts that you are interested on, by category, author, title, date, etc etc.. The steps needed to implement this system are very simple and very few. Here they are listed below and described to be easily replicated within your environment. I would remind you that the demo is only meant to demonstrate how easily is to integrate Oracle Coherence and the Oracle Service Bus, and stimulate your imagination to new technological approaches.1) Install the two products: In this demo used (if necessary, consult the installation guides of 2 products)  - Oracle Service Bus ver. 11.1.1.5.0 http://www.oracle.com/technetwork/middleware/service-bus/downloads/index.html - Oracle Coherence ver. 3.7.1 http://www.oracle.com/technetwork/middleware/coherence/downloads/index.html 2) Because you choose to create a centralized alerting system, we need to define a structure type containing some alerting attributes useful to preserve and organize the information of the various alerts sent by the different applications. Here, then it was built a java class named Alert containing the canonical properties of an alarm information:- Title- Description- System- Time- Severity 3) Therefore, we need to create two configuration files for the coherence node, in order to save the Alert objects within the grid, through the rest/http protocol (more than the native API for Java, C + +, C,. Net). Here are the two minimal configuration files for Coherence:coherence-rest-config.xml resty-server-config.xml This minimum configuration allows me to use a distributed cache named "alerts" that can  also be accessed via http - rest on the host "localhost" over port "8080", objects are of type “oracle.cohsb.Alert”. 4) Below  a simple Java class that represents the type of alert messages: 5) At this point we just need to startup our coherence node, able to listen on http protocol to manage the “alerts” cache, which will receive incoming XML or JSON objects of type Alert. Remember to include in the classpath of the coherence node, the Alert java class and the following coherence libraries and configuration files:  At this point, just run the coherence class node “com.tangosol.net.DefaultCacheServer”advising you to set the following parameters:-Dtangosol.coherence.log.level=9 -Dtangosol.coherence.log=stdout -Dtangosol.coherence.cacheconfig=[PATH_TO_THE_FILE]\resty-server-config.xml 6) Let's create a procedure to test our configuration of Coherence and in order to insert some custom alerts in our cache. The technology with which you want to achieve this functionality is fully not considerable: Javascript, Python, Ruby, Scala, C + +, Java.... Because the protocol to communicate with Coherence is simply HTTP / JSON or XML. For this little demo i choose Java: A method to send/put the alert to the cache: A method to query and view the content of the cache: Finally the main method that execute our methods:  No special library added in the classpath for our class (json struct static defined), when it will be executed, it asks some information such as title, description,... in order to compose and send an alert to the cache and then it will perform an inquiry, to the same cache. At this point, a good exercise at this point, may be to create the same procedure using other technologies, such as a simple html page containing some JavaScript code, and then using Python, Ruby, and so on.7) Now we are ready to start configuring the Oracle Service Bus in order to integrate the two products. First integrate the internal alerting system of Oracle Service Bus with our centralized alerting system based on coherence node. This ensures that by monitoring, or directly from within our Proxy Message Flow, we can throw alerts and save them directly into the Coherence node. To do this I choose to use the jms technology, natively present inside the Oracle Weblogic / Service Bus. Access to the Oracle WebLogic Administration console and create and configure a new JMS connection factory and a new jms destination (queue). Now we should create a new resource of type “alert destination” within our Oracle Service Bus project. The new “alert destination” resource should be configured using the newly created connection factory jms and jms destination. Finally, in order to withdraw the message alert enqueued in our JMS destination and send it to our coherence node, we just need to create a new business service and proxy service within our Oracle Service Bus project.Our business service is responsible for sending a message to our REST service Coherence using as a method action: PUT Finally our proxy service have to collect all messages enqueued on the destination, execute an xquery transformation on those messages  in order to translate them into valid XML / alert objects useful to be sent to our coherence service, through the newly created business service. The message flow pipeline containing the xquery transformation: Incredibly,  we just did a basic first integration between the native alerting system of Oracle Service Bus and our centralized alerting system by simply configuring our coherence node without developing anything.It's time to test it out. To do this I create a proxy service able to generate an alert using our "alert destination", whenever the proxy is invoked. After some invocation to our proxy that generates fake alerts, we could open an Internet browser and type the URL  http://localhost: 8080/alerts/  so we could see what has been inserted within the coherence node. 8) We are ready for the final step.  We would create a new message flow, that can be used to search and display the results in standard mode. To do this I choosen the standard representation of RSS, to display a formatted result on a huge variety of devices such as readers for the iPhone and Android. The inquiry may be defined already at the time of the request able to return only feed / items related to our needs. To do this we need to create a new business service, a new proxy service, and finally a new XQuery Transformation to take care of translating the collection of alerts that will be return from our coherence node in a nicely formatted RSS standard document.So we start right from this resource (xquery), which has the task of transforming a collection of alerts / xml returned from the node coherence in a type well-formatted feed RSS 2.0 our new business service that will search the alerts on our coherence node using the Rest API. And finally, our last resource, the proxy service that will be exposed as an RSS / feeds to various mobile devices and traditional web readers, in which we will intercept any search query, and transform the result returned by the business service in an RSS feed 2.0. The message flow with the transformation phase (Alert TO Feed Items): Finally some little tricks to follow during the routing to the business service, - check for any queries present in the url to require a subset of alerts  - the http header "Accept" to help get an answer XML instead of JSON: In our little demo we also static added some coherence parameters to the request:sort=time:desc;start=0;count=100I would like to get from Coherence that the results will be sorted by date, and starting from 1 up to a maximum of 100.Done!!Just incredible, our centralized alerting system is ready. Inheriting all the qualities and capabilities of the two products involved Oracle Coherence & Oracle Service Bus: - RASP (Reliability, Availability, Scalability, Performance)Now try to use your mobile device, or a normal Internet browser by accessing the RSS just published: Some urls you may test: Search for the last 100 alerts : http://localhost:7001/alarmsSearch for alerts that do not have time set to null (time is not null):http://localhost:7001/alarms?q=time+is+not+nullSearch for alerts that the system property is “Web Browser” (system = ‘Web Browser’):http://localhost:7001/alarms?q=system+%3D+%27Web+Browser%27Search for alerts that the system property is “Web Browser” and the severity property is “Fatal” and the title property contain the word “Javascript”  (system = ‘Web Broser’ and severity = ‘Fatal’ and title like ‘%Javascript%’)http://localhost:8080/alerts?q=system+%3D+%27Web+Browser%27+AND+severity+%3D+%27Fatal%27+AND+title+LIKE+%27%25Javascript%25%27 To compose more complex queries about your need I would suggest you to read the chapter in the coherence documentation inherent the Cohl language (Coherence Query Language) http://download.oracle.com/docs/cd/E24290_01/coh.371/e22837/api_cq.htm . Some useful links: - Oracle Coherence REST API Documentation http://download.oracle.com/docs/cd/E24290_01/coh.371/e22839/rest_intro.htm - Oracle Service Bus Documentation http://download.oracle.com/docs/cd/E21764_01/soa.htm#osb - REST explanation from Wikipedia http://en.wikipedia.org/wiki/Representational_state_transfer At this URL could be downloaded the whole materials of this demo http://blogs.oracle.com/slc/resource/cosb/coh-sb-demo.zip Author: Nino Guarnacci.

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• Getting WCF Bindings and Behaviors from any config source

  - by cibrax

  The need of loading WCF bindings or behaviors from different sources such as files in a disk or databases is a common requirement when dealing with configuration either on the client side or the service side. The traditional way to accomplish this in WCF is loading everything from the standard configuration section (serviceModel section) or creating all the bindings and behaviors by hand in code. However, there is a solution in the middle that becomes handy when more flexibility is needed. This solution involves getting the configuration from any place, and use that configuration to automatically configure any existing binding or behavior instance created with code.  In order to configure a binding instance (System.ServiceModel.Channels.Binding) that you later inject in any endpoint on the client channel or the service host, you first need to get a binding configuration section from any configuration file (you can generate a temp file on the fly if you are using any other source for storing the configuration).  private BindingsSection GetBindingsSection(string path) { System.Configuration.Configuration config = System.Configuration.ConfigurationManager.OpenMappedExeConfiguration( new System.Configuration.ExeConfigurationFileMap() { ExeConfigFilename = path }, System.Configuration.ConfigurationUserLevel.None); var serviceModel = ServiceModelSectionGroup.GetSectionGroup(config); return serviceModel.Bindings; }   The BindingsSection contains a list of all the configured bindings in the serviceModel configuration section, so you can iterate through all the configured binding that get the one you need (You don’t need to have a complete serviceModel section, a section with the bindings only works).  public Binding ResolveBinding(string name) { BindingsSection section = GetBindingsSection(path); foreach (var bindingCollection in section.BindingCollections) { if (bindingCollection.ConfiguredBindings.Count > 0 && bindingCollection.ConfiguredBindings[0].Name == name) { var bindingElement = bindingCollection.ConfiguredBindings[0]; var binding = (Binding)Activator.CreateInstance(bindingCollection.BindingType); binding.Name = bindingElement.Name; bindingElement.ApplyConfiguration(binding); return binding; } } return null; }   The code above does just that, and also instantiates and configures the Binding object (System.ServiceModel.Channels.Binding) you are looking for. As you can see, the binding configuration element contains a method “ApplyConfiguration” that receives the binding instance that needs to be configured. A similar thing can be done for instance with the “Endpoint” behaviors. You first get the BehaviorsSection, and then, the behavior you want to use.  private BehaviorsSection GetBehaviorsSection(string path) { System.Configuration.Configuration config = System.Configuration.ConfigurationManager.OpenMappedExeConfiguration( new System.Configuration.ExeConfigurationFileMap() { ExeConfigFilename = path }, System.Configuration.ConfigurationUserLevel.None); var serviceModel = ServiceModelSectionGroup.GetSectionGroup(config); return serviceModel.Behaviors; }public List<IEndpointBehavior> ResolveEndpointBehavior(string name) { BehaviorsSection section = GetBehaviorsSection(path); List<IEndpointBehavior> endpointBehaviors = new List<IEndpointBehavior>(); if (section.EndpointBehaviors.Count > 0 && section.EndpointBehaviors[0].Name == name) { var behaviorCollectionElement = section.EndpointBehaviors[0]; foreach (BehaviorExtensionElement behaviorExtension in behaviorCollectionElement) { object extension = behaviorExtension.GetType().InvokeMember("CreateBehavior", BindingFlags.InvokeMethod | BindingFlags.NonPublic | BindingFlags.Instance, null, behaviorExtension, null); endpointBehaviors.Add((IEndpointBehavior)extension); } return endpointBehaviors; } return null; }   In this case, the code for creating the behavior instance is more tricky. First of all, a behavior in the configuration section actually represents a set of “IEndpoint” behaviors, and the behavior element you get from the configuration does not have any public method to configure an existing behavior instance. This last one only contains a protected method “CreateBehavior” that you can use for that purpose. Once you get this code implemented, a client channel can be easily configured as follows  var binding = resolver.ResolveBinding("MyBinding"); var behaviors = resolver.ResolveEndpointBehavior("MyBehavior"); SampleServiceClient client = new SampleServiceClient(binding, new EndpointAddress(new Uri("http://localhost:13749/SampleService.svc"), new DnsEndpointIdentity("localhost"))); foreach (var behavior in behaviors) { if(client.Endpoint.Behaviors.Contains(behavior.GetType())) { client.Endpoint.Behaviors.Remove(behavior.GetType()); } client.Endpoint.Behaviors.Add(behavior); }   The code above assumes that a configuration file (in any place) with a binding “MyBinding” and a behavior “MyBehavior” exists. That file can look like this,  <system.serviceModel> <bindings> <basicHttpBinding> <binding name="MyBinding"> <security mode="Transport"></security> </binding> </basicHttpBinding> </bindings> <behaviors> <endpointBehaviors> <behavior name="MyBehavior"> <clientCredentials> <windows/> </clientCredentials> </behavior> </endpointBehaviors> </behaviors> </system.serviceModel>   The same thing can be done of course in the service host if you want to manually configure the bindings and behaviors.  

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• Sun Fire X4800 M2 Delivers World Record TPC-C for x86 Systems

  - by Brian

  Oracle's Sun Fire X4800 M2 server equipped with eight 2.4 GHz Intel Xeon Processor E7-8870 chips obtained a result of 5,055,888 tpmC on the TPC-C benchmark. This result is a world record for x86 servers. Oracle demonstrated this world record database performance running Oracle Database 11g Release 2 Enterprise Edition with Partitioning. The Sun Fire X4800 M2 server delivered a new x86 TPC-C world record of 5,055,888 tpmC with a price performance of $0.89/tpmC using Oracle Database 11g Release 2. This configuration is available 06/26/12. The Sun Fire X4800 M2 server delivers 3.0x times better performance than the next 8-processor result, an IBM System p 570 equipped with POWER6 processors. The Sun Fire X4800 M2 server has 3.1x times better price/performance than the 8-processor 4.7GHz POWER6 IBM System p 570. The Sun Fire X4800 M2 server has 1.6x times better performance than the 4-processor IBM x3850 X5 system equipped with Intel Xeon processors. This is the first TPC-C result on any system using eight Intel Xeon Processor E7-8800 Series chips. The Sun Fire X4800 M2 server is the first x86 system to get over 5 million tpmC. The Oracle solution utilized Oracle Linux operating system and Oracle Database 11g Enterprise Edition Release 2 with Partitioning to produce the x86 world record TPC-C benchmark performance. Performance Landscape Select TPC-C results (sorted by tpmC, bigger is better) System p/c/t tpmC Price/tpmC Avail Database MemorySize Sun Fire X4800 M2 8/80/160 5,055,888 0.89 USD 6/26/2012 Oracle 11g R2 4 TB IBM x3850 X5 4/40/80 3,014,684 0.59 USD 7/11/2011 DB2 ESE 9.7 3 TB IBM x3850 X5 4/32/64 2,308,099 0.60 USD 5/20/2011 DB2 ESE 9.7 1.5 TB IBM System p 570 8/16/32 1,616,162 3.54 USD 11/21/2007 DB2 9.0 2 TB p/c/t - processors, cores, threads Avail - availability date Oracle and IBM TPC-C Response times System tpmC Response Time (sec) New Order 90th% Response Time (sec) New Order Average Sun Fire X4800 M2 5,055,888 0.210 0.166 IBM x3850 X5 3,014,684 0.500 0.272 Ratios - Oracle Better 1.6x 1.4x 1.3x Oracle uses average new order response time for comparison between Oracle and IBM. Graphs of Oracle's and IBM's response times for New-Order can be found in the full disclosure reports on TPC's website TPC-C Official Result Page. Configuration Summary and Results Hardware Configuration: Server Sun Fire X4800 M2 server 8 x 2.4 GHz Intel Xeon Processor E7-8870 4 TB memory 8 x 300 GB 10K RPM SAS internal disks 8 x Dual port 8 Gbs FC HBA Data Storage 10 x Sun Fire X4270 M2 servers configured as COMSTAR heads, each with 1 x 3.06 GHz Intel Xeon X5675 processor 8 GB memory 10 x 2 TB 7.2K RPM 3.5" SAS disks 2 x Sun Storage F5100 Flash Array storage (1.92 TB each) 1 x Brocade 5300 switches Redo Storage 2 x Sun Fire X4270 M2 servers configured as COMSTAR heads, each with 1 x 3.06 GHz Intel Xeon X5675 processor 8 GB memory 11 x 2 TB 7.2K RPM 3.5" SAS disks Clients 8 x Sun Fire X4170 M2 servers, each with 2 x 3.06 GHz Intel Xeon X5675 processors 48 GB memory 2 x 300 GB 10K RPM SAS disks Software Configuration: Oracle Linux (Sun Fire 4800 M2) Oracle Solaris 11 Express (COMSTAR for Sun Fire X4270 M2) Oracle Solaris 10 9/10 (Sun Fire X4170 M2) Oracle Database 11g Release 2 Enterprise Edition with Partitioning Oracle iPlanet Web Server 7.0 U5 Tuxedo CFS-R Tier 1 Results: System: Sun Fire X4800 M2 tpmC: 5,055,888 Price/tpmC: 0.89 USD Available: 6/26/2012 Database: Oracle Database 11g Cluster: no New Order Average Response: 0.166 seconds Benchmark Description TPC-C is an OLTP system benchmark. It simulates a complete environment where a population of terminal operators executes transactions against a database. The benchmark is centered around the principal activities (transactions) of an order-entry environment. These transactions include entering and delivering orders, recording payments, checking the status of orders, and monitoring the level of stock at the warehouses. Key Points and Best Practices Oracle Database 11g Release 2 Enterprise Edition with Partitioning scales easily to this high level of performance. COMSTAR (Common Multiprotocol SCSI Target) is the software framework that enables an Oracle Solaris host to serve as a SCSI Target platform. COMSTAR uses a modular approach to break the huge task of handling all the different pieces in a SCSI target subsystem into independent functional modules which are glued together by the SCSI Target Mode Framework (STMF). The modules implementing functionality at SCSI level (disk, tape, medium changer etc.) are not required to know about the underlying transport. And the modules implementing the transport protocol (FC, iSCSI, etc.) are not aware of the SCSI-level functionality of the packets they are transporting. The framework hides the details of allocation providing execution context and cleanup of SCSI commands and associated resources and simplifies the task of writing the SCSI or transport modules. Oracle iPlanet Web Server middleware is used for the client tier of the benchmark. Each web server instance supports more than a quarter-million users while satisfying the response time requirement from the TPC-C benchmark. See Also Oracle Press Release -- Sun Fire X4800 M2 TPC-C Executive Summary tpc.org Complete Sun Fire X4800 M2 TPC-C Full Disclosure Report tpc.org Transaction Processing Performance Council (TPC) Home Page Ideas International Benchmark Page Sun Fire X4800 M2 Server oracle.com OTN Oracle Linux oracle.com OTN Oracle Solaris oracle.com OTN Oracle Database 11g Release 2 Enterprise Edition oracle.com OTN Sun Storage F5100 Flash Array oracle.com OTN Disclosure Statement TPC Benchmark C, tpmC, and TPC-C are trademarks of the Transaction Processing Performance Council (TPC). Sun Fire X4800 M2 (8/80/160) with Oracle Database 11g Release 2 Enterprise Edition with Partitioning, 5,055,888 tpmC, $0.89 USD/tpmC, available 6/26/2012. IBM x3850 X5 (4/40/80) with DB2 ESE 9.7, 3,014,684 tpmC, $0.59 USD/tpmC, available 7/11/2011. IBM x3850 X5 (4/32/64) with DB2 ESE 9.7, 2,308,099 tpmC, $0.60 USD/tpmC, available 5/20/2011. IBM System p 570 (8/16/32) with DB2 9.0, 1,616,162 tpmC, $3.54 USD/tpmC, available 11/21/2007. Source: http://www.tpc.org/tpcc, results as of 7/15/2011.

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• Can I delete libc-bin?

  - by Balazs Szikszay

  Question is simple, I need to know because I cant upgrade/install anything, because it always says I have to uninstall/delete it to continue. It also says dont do it, if I dont know what I am doing. EDIT: szikszay@szikszay-Latitude-E5530-non-vPro:~$ sudo apt-get 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. ia32-libs-multiarch:i386 : Depends: libqtcore4:i386 but it is not installed Depends: libqtgui4:i386 but it is not installed Depends: libqt4-dbus:i386 but it is not installed Depends: libqt4-network:i386 but it is not installed Depends: libqt4-opengl:i386 but it is not installed Depends: libqt4-qt3support:i386 but it is not installed Depends: libqt4-script:i386 but it is not installed Depends: libqt4-scripttools:i386 but it is not installed Depends: libqt4-sql:i386 but it is not installed Depends: libqt4-svg:i386 but it is not installed Depends: libqt4-test:i386 but it is not installed Depends: libqt4-xml:i386 but it is not installed Depends: libqt4-xmlpatterns:i386 but it is not installed Depends: libcups2:i386 but it is not installed Depends: libcupsimage2:i386 but it is not installed Depends: libcurl3:i386 but it is not installed Depends: libnss3:i386 but it is not installed Depends: libnspr4:i386 but it is not installed Depends: libssl1.0.0:i386 but it is not installed Recommends: libgl1-mesa-glx:i386 but it is not installed Recommends: libgl1-mesa-dri:i386 but it is not installed lib32ffi6 : Depends: libc6-i386 (= 2.4) but it is not installed lib32gcc1 : Depends: libc6-i386 (= 2.5) but it is not installed lib32nss-mdns : Depends: libc6-i386 (= 2.4) but it is not installed lib32stdc++6 : Depends: libc6-i386 (= 2.4) but it is not installed lib32z1 : Depends: libc6-i386 (= 2.4) but it is not installed libacl1:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libattr1:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libaudio2:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libavahi-client3:i386 : Depends: libc6:i386 (= 2.4) but it is not installed Depends: libdbus-1-3:i386 (= 1.1.1) but it is not installed libavahi-common3:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libcomerr2:i386 : Depends: libc6:i386 (= 2.12) but it is not installed libdb5.1:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libdrm-intel1:i386 : Depends: libc6:i386 (= 2.3.4) but it is not installed libdrm-nouveau1a:i386 : Depends: libc6:i386 (= 2.1.3) but it is not installed libdrm-radeon1:i386 : Depends: libc6:i386 (= 2.3.4) but it is not installed libdrm2:i386 : Depends: libc6:i386 (= 2.7) but it is not installed libffi6:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libfontconfig1:i386 : Depends: libc6:i386 (= 2.7) but it is not installed Depends: libexpat1:i386 (= 1.95.8) but it is not installed Depends: libfreetype6:i386 (= 2.2.1) but it is not installed libgcc1:i386 : Depends: libc6:i386 (= 2.2.4) but it is not installed libgcrypt11:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libgdbm3:i386 : Depends: libc6:i386 (= 2.1.3) but it is not installed libglib2.0-0:i386 : Depends: libc6:i386 (= 2.9) but it is not installed libgpg-error0:i386 : Depends: libc6:i386 (= 2.1.3) but it is not installed libice6:i386 : Depends: libc6:i386 (= 2.11) but it is not installed libidn11:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libjpeg62:i386 : Depends: libc6:i386 (= 2.7) but it is not installed libkeyutils1:i386 : Depends: libc6:i386 (= 2.1.3) but it is not installed liblcms1:i386 : Depends: libc6:i386 (= 2.7) but it is not installed libllvm2.9:i386 : Depends: libc6:i386 (= 2.11) but it is not installed libmng1:i386 : Depends: libc6:i386 (= 2.11) but it is not installed libpciaccess0:i386 : Depends: libc6:i386 (= 2.7) but it is not installed libpcre3:i386 : Depends: libc6:i386 (= 2.4) but it is not installed librtmp0:i386 : Depends: libc6:i386 (= 2.7) but it is not installed Depends: libgnutls26:i386 (= 2.9.11-0) but it is not installed libsasl2-2:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libsasl2-modules:i386 : Depends: libc6:i386 (= 2.4) but it is not installed Depends: libssl1.0.0:i386 (= 1.0.0) but it is not installed libselinux1:i386 : Depends: libc6:i386 (= 2.8) but it is not installed libsm6:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libsqlite3-0:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libstdc++6:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libuuid1:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libx11-6:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libxau6:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libxcb1:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libxdamage1:i386 : Depends: libc6:i386 (= 2.1.3) but it is not installed libxdmcp6:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libxext6:i386 : Depends: libc6:i386 (= 2.4) but it is not installed libxfixes3:i386 : Depends: libc6:i386 (= 2.1.3) but it is not installed libxrender1:i386 : Depends: libc6:i386 (= 2.1.3) but it is not installed libxss1:i386 : Depends: libc6:i386 (= 2.1.3) but it is not installed libxt6:i386 : Depends: libc6:i386 (= 2.7) but it is not installed libxxf86vm1:i386 : Depends: libc6:i386 (= 2.1.3) but it is not installed zlib1g:i386 : Depends: libc6:i386 (= 2.4) but it is not installed E: Unmet dependencies. Try using -f. szikszay@szikszay-Latitude-E5530-non-vPro:~$ sudo apt-get upgrade -f Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... Done The following packages will be REMOVED libc-bin The following NEW packages will be installed libc-bin:i386 libc6:i386 libc6-i386 libcups2:i386 libcupsimage2:i386 libcurl3:i386 libdbus-1-3:i386 libexpat1:i386 libfreetype6:i386 libgl1-mesa-dri:i386 libgl1-mesa-glx:i386 libglapi-mesa:i386 libgnutls26:i386 libgssapi-krb5-2:i386 libk5crypto3:i386 libkrb5-3:i386 libkrb5support0:i386 libldap-2.4-2:i386 libnspr4:i386 libnss3:i386 libpng12-0:i386 libqt4-dbus:i386 libqt4-declarative:i386 libqt4-designer:i386 libqt4-network:i386 libqt4-opengl:i386 libqt4-qt3support:i386 libqt4-script:i386 libqt4-scripttools:i386 libqt4-sql:i386 libqt4-svg:i386 libqt4-test:i386 libqt4-xml:i386 libqt4-xmlpatterns:i386 libqtcore4:i386 libqtgui4:i386 libssl1.0.0:i386 libtasn1-3:i386 libtiff4:i386 libxi6:i386 The following packages have been kept back: ginn libgrip0 linux-headers-generic linux-image-generic unity unity-common xserver-xorg-input-evdev xserver-xorg-input-synaptics The following packages will be upgraded: accountsservice acpi-support acpid aisleriot alsa-utils app-install-data-partner apparmor appmenu-qt apport apport-gtk apt apt-transport-https apt-utils aptdaemon aptdaemon-data apturl apturl-common at-spi2-core bamfdaemon banshee banshee-extension-soundmenu banshee-extension-ubuntuonemusicstore baobab bind9-host binutils bluez bluez-alsa bluez-cups bluez-gstreamer brasero brasero-cdrkit brasero-common brltty bzip2 ca-certificates-java checkbox checkbox-gtk colord command-not-found command-not-found-data compiz compiz-core compiz-gnome compiz-plugins-default compiz-plugins-main-default cups cups-bsd cups-client cups-common cups-ppdc dbus dbus-x11 deja-dup desktop-file-utils dnsutils dpkg ecryptfs-utils empathy empathy-common eog evince evince-common evolution-data-server evolution-data-server-common file-roller firefox firefox-globalmenu firefox-gnome-support firefox-locale-en firefox-locale-hu gbrainy gcalctool gconf2 gconf2-common gedit gedit-common ghostscript ghostscript-cups ghostscript-x gir1.2-atspi-2.0 gir1.2-gconf-2.0 gir1.2-gnomebluetooth-1.0 gir1.2-gtk-3.0 gir1.2-gtksource-3.0 gir1.2-totem-1.0 gir1.2-unity-4.0 gir1.2-webkit-3.0 gnome-accessibility-themes gnome-bluetooth gnome-control-center gnome-control-center-data gnome-desktop3-data gnome-font-viewer gnome-games-common gnome-icon-theme gnome-keyring gnome-mahjongg gnome-online-accounts gnome-orca gnome-power-manager gnome-screenshot gnome-search-tool gnome-session gnome-session-bin gnome-session-canberra gnome-session-common gnome-settings-daemon gnome-sudoku gnome-system-log gnome-system-monitor gnome-utils-common gnomine gnupg gpgv grub-common grub-pc grub-pc-bin grub2-common gstreamer0.10-gconf gstreamer0.10-plugins-good gstreamer0.10-pulseaudio gvfs gvfs-backends gvfs-bin gvfs-fuse gwibber gwibber-service gwibber-service-facebook gwibber-service-identica gwibber-service-twitter gzip hpijs hplip hplip-cups hplip-data icedtea-6-jre-cacao icedtea-6-jre-jamvm icedtea-netx ifupdown im-switch indicator-datetime indicator-session indicator-sound initramfs-tools initramfs-tools-bin initscripts insserv isc-dhcp-client isc-dhcp-common iso-codes jockey-common jockey-gtk language-pack-en language-pack-en-base language-pack-gnome-en language-pack-gnome-en-base language-pack-gnome-hu language-pack-gnome-hu-base language-pack-hu language-pack-hu-base language-selector-common language-selector-gnome libaccountsservice0 libapt-inst1.3 libapt-pkg4.11 libarchive1 libasound2-plugins libatk-adaptor libatspi2.0-0 libbamf0 libbamf3-0 libbind9-60 libbluetooth3 libbrasero-media3-1 libbrlapi0.5 libbz2-1.0 libc-dev-bin libc6 libc6-dev libcamel-1.2-29 libcanberra-gtk-module libcanberra-gtk0 libcanberra-gtk3-0 libcanberra-gtk3-module libcanberra-pulse libcanberra0 libcolord1 libcups2 libcupscgi1 libcupsdriver1 libcupsimage2 libcupsmime1 libcupsppdc1 libcurl3-gnutls libdbus-1-3 libdbus-glib-1-2 libdecoration0 libdns69 libebackend-1.2-1 libebook1.2-12 libecal1.2-10 libecryptfs0 libedata-book-1.2-11 libedata-cal-1.2-13 libedataserver1.2-15 libedataserverui-3.0-1 libevince3-3 libexif12 libexpat1 libfreetype6 libgail-3-0 libgail-3-common libgck-1-0 libgconf2-4 libgcr-3-1 libgdata-common libgdata13 libgl1-mesa-dri libgl1-mesa-glx libglapi-mesa libglu1-mesa libgnome-bluetooth8 libgnome-control-center1 libgnome-desktop-3-2 libgnutls26 libgoa-1.0-0 libgs9 libgs9-common libgssapi-krb5-2 libgtk-3-0 libgtk-3-bin libgtk-3-common libgtksourceview-3.0-0 libgtksourceview-3.0-common libgudev-1.0-0 libgweather-3-0 libgweather-common libgwibber-gtk2 libgwibber2 libhpmud0 libicu44 libimobiledevice2 libisc62 libisccc60 libisccfg62 libjasper1 libjs-jquery libk5crypto3 libkrb5-3 libkrb5support0 libldap-2.4-2 liblightdm-gobject-1-0 liblwres60 libmetacity-private0 libmission-control-plugins0 libmono-cairo4.0-cil libmono-corlib4.0-cil libmono-csharp4.0-cil libmono-i18n-west4.0-cil libmono-i18n4.0-cil libmono-posix4.0-cil libmono-security4.0-cil libmono-sharpzip4.84-cil libmono-system-configuration4.0-cil libmono-system-core4.0-cil libmono-system-drawing4.0-cil libmono-system-security4.0-cil libmono-system-xml4.0-cil libmono-system4.0-cil libmono-zeroconf1.0-cil libmysqlclient16 libnautilus-extension1 libncurses5 libncursesw5 libnm-glib-vpn1 libnm-glib4 libnm-gtk-common libnm-gtk0 libnm-util2 libnotify0.4-cil libnspr4 libnss3 libnss3-1d libnux-1.0-0 libnux-1.0-common libpam-gnome-keyring libpam-modules libpam-modules-bin libpam-runtime libpam0g libperl5.12 libpng12-0 libpoppler-glib6 libpoppler13 libproxy0 libpulse-mainloop-glib0 libpulse0 libpurple-bin libpurple0 libpython2.7 libqt4-dbus libqt4-declarative libqt4-network libqt4-opengl libqt4-script libqt4-sql libqt4-sql-mysql libqt4-svg libqt4-xml libqt4-xmlpatterns libqtcore4 libqtgui4 libreoffice-base-core libreoffice-calc libreoffice-common libreoffice-core libreoffice-draw libreoffice-emailmerge libreoffice-gnome libreoffice-gtk libreoffice-help-en-gb libreoffice-help-en-us libreoffice-help-hu libreoffice-impress libreoffice-l10n-common libreoffice-l10n-en-gb libreoffice-l10n-en-za libreoffice-l10n-hu libreoffice-math libreoffice-style-human libreoffice-writer libsane-hpaio libsmbclient libsnmp-base libsnmp15 libssl1.0.0 libsyncdaemon-1.0-1 libt1-5 libtasn1-3 libtiff4 libtinfo5 libtotem0 libubuntuone-1.0-1 libubuntuone1.0-cil libudev0 libunity-core-4.0-4 libunity6 libusbmuxd1 libv4l-0 libvorbis0a libvorbisenc2 libvorbisfile3 libwbclient0 libwebkitgtk-1.0-0 libwebkitgtk-1.0-common libwebkitgtk-3.0-0 libwebkitgtk-3.0-common libxi6 libxml2 libxslt1.1 lightdm linux-firmware linux-libc-dev mawk metacity metacity-common mobile-broadband-provider-info modemmanager mono-4.0-gac mono-gac mono-runtime mousetweaks multiarch-support mysql-common nautilus nautilus-data nautilus-sendto-empathy ncurses-base ncurses-bin network-manager network-manager-gnome nux-tools onboard openjdk-6-jre openjdk-6-jre-headless openjdk-6-jre-lib openssl perl perl-base perl-modules poppler-utils pulseaudio pulseaudio-esound-compat pulseaudio-module-bluetooth pulseaudio-module-gconf pulseaudio-module-x11 pulseaudio-utils python-apport python-aptdaemon python-aptdaemon-gtk python-aptdaemon.gtk3widgets python-aptdaemon.gtkwidgets python-brlapi python-crypto python-cups python-cupshelpers python-egenix-mxdatetime python-egenix-mxtools python-gobject python-gobject-cairo python-httplib2 python-keyring python-launchpadlib python-libproxy python-libxml2 python-pam python-papyon python-pkg-resources python-problem-report python-pyatspi2 python-software-properties python-ubuntuone-client python-ubuntuone-storageprotocol python-uno python2.7 python2.7-minimal qdbus samba-common samba-common-bin seahorse shotwell simple-scan smbclient sni-qt software-center software-properties-common software-properties-gtk sudo system-config-printer-common system-config-printer-gnome system-config-printer-udev sysv-rc sysvinit-utils telepathy-indicator telepathy-mission-control-5 thunderbird thunderbird-globalmenu thunderbird-gnome-support thunderbird-locale-en thunderbird-locale-en-gb thunderbird-locale-en-us thunderbird-locale-hu tomboy totem totem-common totem-mozilla totem-plugins transmission-common transmission-gtk ttf-opensymbol tzdata tzdata-java ubuntu-desktop ubuntu-docs ubuntu-minimal ubuntu-sso-client ubuntu-standard ubuntuone-client ubuntuone-client-gnome ubuntuone-couch udev unity-lens-applications unity-services uno-libs3 update-manager update-manager-core update-notifier update-notifier-common upstart ure usbmuxd vim-common vim-tiny vinagre vino whois x11-common xdiagnose xorg xserver-common xserver-xorg xserver-xorg-core xserver-xorg-input-all xserver-xorg-video-all xserver-xorg-video-intel xserver-xorg-video-openchrome xserver-xorg-video-qxl xul-ext-ubufox WARNING: The following essential packages will be removed. This should NOT be done unless you know exactly what you are doing! libc-bin 498 upgraded, 40 newly installed, 1 to remove and 8 not upgraded. 69 not fully installed or removed. Need to get 439 MB of archives. After this operation, 135 MB of additional disk space will be used. You are about to do something potentially harmful To continue type in the phrase ‘Yes, do as I say!’ ?] I tried to upgrade but it gives me an error, when i try to upgrade-f it says i should delete libc-bin. Thanks for the answers btw. EDIT2: it also says this: The package system is broken If you are using third party repositories then disable them, since they are a common source of problems. Now run the following command in a terminal: apt-get install -f

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• Problem with reformatting Sandisk read-only USB drive

  - by dimas

  Hi everyone I have a problem reformatting my USB drive. Its showing this error message whenever I tried to reformat it using gparted: Parted 0.11.0 --enable-libparted-dmraid Libparted 2.3 Format /dev/sdb1 as ntfs 00:00:01 ( ERROR ) calibrate /dev/sdb1 00:00:01 ( SUCCESS ) path: /dev/sdb1 start: 22,768 end: 31,248,383 size: 31,225,616 (14.89 GiB) set partition type on /dev/sdb1 00:00:00 ( ERROR ) libparted messages ( INFO ) Unable to open /dev/sdb read-write (Read-only file system). /dev/sdb has been opened read-only. Unable to open /dev/sdb read-write (Read-only file system). /dev/sdb has been opened read-only. Unable to open /dev/sdb read-write (Read-only file system). /dev/sdb has been opened read-only. Unable to open /dev/sdb read-write (Read-only file system). /dev/sdb has been opened read-only. Unable to open /dev/sdb read-write (Read-only file system). /dev/sdb has been opened read-only. Unable to open /dev/sdb read-write (Read-only file system). /dev/sdb has been opened read-only. Unable to open /dev/sdb read-write (Read-only file system). /dev/sdb has been opened read-only. Unable to open /dev/sdb read-write (Read-only file system). /dev/sdb has been opened read-only. Can't write to /dev/sdb, because it is opened read-only. Unable to open /dev/sdb read-write (Read-only file system). /dev/sdb has been opened read-only. Reason I wanted to reformat it is because it just suddenly stopped working when I was transferring files from my pc and also it erased every content that was saved in the usb drive. I tried various tutorials on the net regarding this however I can't find a solution on how to make a usb drive change its read-only property to read-write or anything that would enable me to reformat this usb drive. I have also checked this link format read-only USB drive but this one doesn't have a solution. Also am attempting to do this on Ubuntu 12.04.

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• Delegate performance of Roslyn Sept 2012 CTP is impressive

  - by dotneteer

  I wanted to dynamically compile some delegates using Roslyn. I came across this article by Piotr Sowa. The article shows that the delegate compiled with Roslyn CTP was not very fast. Since the article was written using the Roslyn June 2012, I decided to give Sept 2012 CTP a try. There are significant changes in Roslyn Sept 2012 CTP in both C# syntax supported as well as API. I found Anoop Madhisidanan’s article that has an example of the new API. With that, I was able to put together a comparison. In my test, the Roslyn compiled delegate is as fast as C# (VS 2012) compiled delegate. See the source code below and give it a try. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Diagnostics; using Roslyn.Compilers; using Roslyn.Scripting.CSharp; using Roslyn.Scripting; namespace RoslynTest { class Program { public Func del; static void Main(string[] args) { Stopwatch stopWatch = new Stopwatch(); Program p = new Program(); p.SetupDel(); //Comment out this line and uncomment the next line to compare //p.SetupScript(); stopWatch.Start(); int result = DoWork(p.del); stopWatch.Stop(); Console.WriteLine(result); Console.WriteLine("Time elapsed {0}", stopWatch.ElapsedMilliseconds); Console.Read(); } private void SetupDel() { del = (s, i) => ++s; } private void SetupScript() { //Create the script engine //Script engine constructor parameters go changed var engine=new ScriptEngine(); //Let us use engine's Addreference for adding the required //assemblies new[] { typeof (Console).Assembly, typeof (Program).Assembly, typeof (IEnumerable<>).Assembly, typeof (IQueryable).Assembly }.ToList().ForEach(asm => engine.AddReference(asm)); new[] { "System", "System.Linq", "System.Collections", "System.Collections.Generic" }.ToList().ForEach(ns=>engine.ImportNamespace(ns)); //Now, you need to create a session using engine's CreateSession method, //which can be seeded with a host object var session = engine.CreateSession(); var submission = session.CompileSubmission>("new Func((s, i) => ++s)"); del = submission.Execute(); //- See more at: http://www.amazedsaint.com/2012/09/roslyn-september-ctp-2012-overview-api.html#sthash.1VutrWiW.dpuf } private static int DoWork(Func del) { int result = Enumerable.Range(1, 1000000).Aggregate(del); return result; } } }  Since Roslyn Sept 2012 CTP is already over a year old, I cannot wait to see a new version coming out.

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• Separate keyboard shortcuts for switching between keyboard layouts

  - by Vitaliy

  I have a few language keyboard layouts installed in my Ubuntu 12.04. I am using ctrl-shift keyboard shortcut for switching between language layouts. Such switching method takes a lot of my time. Is there any posibility to set up a different keyboard shortcut for each language keyboard layout? For example: ctrl-shift-1 (english layout), ctrl-shift-2 (polish layout), ctrl-shift-3 (italian layout) etc.

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• HeartOS RTOS Support for ARM Processors

  Provides scalable, compact, lightweight safety-critical platform for ARM processors Real-time operating system - Operating system - Realtime - Hardware - Embedded system

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• Writing the tests for FluentPath

  Writing the tests for FluentPath is a challenge. The library is a wrapper around a legacy API (System.IO) that wasnt designed to be easily testable. If it were more testable, the sensible testing methodology would be to tell System.IO to act against a mock file system, which would enable me to verify that my code is doing the expected file system operations without having to manipulate the actual, physical file system: what we are testing here is FluentPath, not System.IO. Unfortunately, that...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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• Purely technical reasons for PHP as a first choice?

  - by JoelFan

  I know this may come off as a flame-y / troll-y, but I hope you will take my word for it that it's not my intention. I am just trying to understand the PHP phenomenon. After looking at the many technical issues with the language design of PHP, I am hard pressed to find any redeeming technical advantages where PHP surpasses all other languages. Before coming to the conclusion that there would simply be no reason to choose PHP as a development language on purely technical grounds, I would like to ask, if all non-technical factors were equal (such as what language the developers already know, what languages the hosting provider offers, language of existing code, cost, license, corporate fiat, etc.), would there be any type of new software system that would indicate making PHP a first choice for development? If so, what technical advantage does PHP have over all other languages that would cause you to choose it? EDIT: I am not interested in comparing PHP "out of the box" with other languages "out of the box". If PHP has a certain feature "out of the box" that another language has only after installing some readily available add-on, that is not considered an advantage for PHP for the purposes of this question.

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• Leitner Box with C#

  For easy learning (specially for learning a foreign language) you can use Leitner Box

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• De-index URL parameters by value

  - by Doug Firr

  Upon reading over this question is lengthy so allow me to provide a one sentence summary: I need to get Google to de-index URLs that have parameters with certain values appended I have a website example.com with language translations. There used to be many translations but I deleted them all so that only English (Default) and French options remain. When one selects a language option a parameter is aded to the URL. For example, the home page: https://example.com (default) https://example.com/main?l=fr_FR (French) I added a robots.txt to stop Google from crawling any of the language translations: # robots.txt generated at http://www.mcanerin.com User-agent: * Disallow: Disallow: /cgi-bin/ Disallow: /*?l= So any pages containing "?l=" should not be crawled. I checked in GWT using the robots testing tool. It works. But under html improvements the previously crawled language translation URLs remain indexed. The internet says to add a 404 to the header of the removed URLs so the Googles knows to de-index it. I checked to see what my CMS would throw up if I visited one of the URLs that should no longer exist. This URL was listed in GWT under duplicate title tags (One of the reasons I want to scrub up my URLS) https://example.com/reports/view/884?l=vi_VN&l=hy_AM This URL should not exist - I removed the language translations. The page loads when it should not! I played around. I typed example.com?whatever123 It seems that parameters always load as long as everything before the question mark is a real URL. So if Google has indexed all these URLS with parameters how do I remove them? I cannot check if a 404 is being generated because the page always loads because it's a parameter that needs to be de-indexed.

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• Making your WCF Web Apis to speak in multiple languages

  - by cibrax

  One of the key aspects of how the web works today is content negotiation. The idea of content negotiation is based on the fact that a single resource can have multiple representations, so user agents (or clients) and servers can work together to chose one of them. The http specification defines several “Accept” headers that a client can use to negotiate content with a server, and among all those, there is one for restricting the set of natural languages that are preferred as a response to a request, “Accept-Language”. For example, a client can specify “es” in this header for specifying that he prefers to receive the content in spanish or “en” in english. However, there are certain scenarios where the “Accept-Language” header is just not enough, and you might want to have a way to pass the “accepted” language as part of the resource url as an extension. For example, http://localhost/ProductCatalog/Products/1.es” returns all the descriptions for the product with id “1” in spanish. This is useful for scenarios in which you want to embed the link somewhere, such a document, an email or a page.  Supporting both scenarios, the header and the url extension, is really simple in the new WCF programming model. You only need to provide a processor implementation for any of them. Let’s say I have a resource implementation as part of a product catalog I want to expose with the WCF web apis. [ServiceContract][Export]public class ProductResource{ IProductRepository repository;  [ImportingConstructor] public ProductResource(IProductRepository repository) { this.repository = repository; }  [WebGet(UriTemplate = "{id}")] public Product Get(string id, HttpResponseMessage response) { var product = repository.GetById(int.Parse(id)); if (product == null) { response.StatusCode = HttpStatusCode.NotFound; response.Content = new StringContent(Messages.OrderNotFound); }  return product; }} The Get method implementation in this resource assumes the desired culture will be attached to the current thread (Thread.CurrentThread.Culture). Another option is to pass the desired culture as an additional argument in the method, so my processor implementation will handle both options. This method is also using an auto-generated class for handling string resources, Messages, which is available in the different cultures that the service implementation supports. For example, Messages.resx contains “OrderNotFound”: “Order Not Found” Messages.es.resx contains “OrderNotFound”: “No se encontro orden” The processor implementation bellow tackles the first scenario, in which the desired language is passed as part of the “Accept-Language” header. public class CultureProcessor : Processor<HttpRequestMessage, CultureInfo>{ string defaultLanguage = null;  public CultureProcessor(string defaultLanguage = "en") { this.defaultLanguage = defaultLanguage; this.InArguments[0].Name = HttpPipelineFormatter.ArgumentHttpRequestMessage; this.OutArguments[0].Name = "culture"; }  public override ProcessorResult<CultureInfo> OnExecute(HttpRequestMessage request) { CultureInfo culture = null; if (request.Headers.AcceptLanguage.Count > 0) { var language = request.Headers.AcceptLanguage.First().Value; culture = new CultureInfo(language); } else { culture = new CultureInfo(defaultLanguage); }  Thread.CurrentThread.CurrentCulture = culture; Messages.Culture = culture;  return new ProcessorResult<CultureInfo> { Output = culture }; }}   As you can see, the processor initializes a new CultureInfo instance with the value provided in the “Accept-Language” header, and set that instance to the current thread and the auto-generated resource class with all the messages. In addition, the CultureInfo instance is returned as an output argument called “culture”, making possible to receive that argument in any method implementation   The following code shows the implementation of the processor for handling languages as url extensions.   public class CultureExtensionProcessor : Processor<HttpRequestMessage, Uri>{ public CultureExtensionProcessor() { this.OutArguments[0].Name = HttpPipelineFormatter.ArgumentUri; }  public override ProcessorResult<Uri> OnExecute(HttpRequestMessage httpRequestMessage) { var requestUri = httpRequestMessage.RequestUri.OriginalString;  var extensionPosition = requestUri.LastIndexOf(".");  if (extensionPosition > -1) { var extension = requestUri.Substring(extensionPosition + 1);  var query = httpRequestMessage.RequestUri.Query;  requestUri = string.Format("{0}?{1}", requestUri.Substring(0, extensionPosition), query); ;  var uri = new Uri(requestUri);  httpRequestMessage.Headers.AcceptLanguage.Clear();  httpRequestMessage.Headers.AcceptLanguage.Add(new StringWithQualityHeaderValue(extension));  var result = new ProcessorResult<Uri>();  result.Output = uri;  return result; }  return new ProcessorResult<Uri>(); }} The last step is to inject both processors as part of the service configuration as it is shown bellow, public void RegisterRequestProcessorsForOperation(HttpOperationDescription operation, IList<Processor> processors, MediaTypeProcessorMode mode){ processors.Insert(0, new CultureExtensionProcessor()); processors.Add(new CultureProcessor());} Once you configured the two processors in the pipeline, your service will start speaking different languages :). Note: Url extensions don’t seem to be working in the current bits when you are using Url extensions in a base address. As far as I could see, ASP.NET intercepts the request first and tries to route the request to a registered ASP.NET Http Handler with that extension. For example, “http://localhost/ProductCatalog/products.es” does not work, but “http://localhost/ProductCatalog/products/1.es” does.

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• Ubuntu 12.04 + Raid0 + Windows 7 not loading

  - by Douglas

  please someone help me.... (Sorry for my english) Hi, I have a Pc with 2 Hd (1Tb each) on Raid0. I had a Windows 7 64bits working for several months. When I installed the Windows I let a 100Gb partition empty to install Ubuntu someday. I was using Linux on a Virtualbox, but this week I tried to install Ubuntu 12.04 in this 100Gb partition. I used the Ubuntu alternate cd, because the 'normal' cd was giving me trouble with the Raid0. The grub installation always reported a error. After a lot of work I found that I nedded to install grub on partition /dev/mapper/isw_chjbfeec_DougRaid1 (see Bootinfo below). The Windows installation created a 100Mb boot partition, so I needed to install grub in this partition. Now I have the Ubuntu working 100% ok. The problem is, the Windows is not booting! The windows option is present on the grub menu, but when I choose the windows option there is a black screen and after that the grub is reloaded. My Bootinfo is: Boot Info Script 0.61 [1 April 2012] ============================= Boot Info Summary: =============================== => Grub2 (v1.99) is installed in the MBR of /dev/sda and looks at sector 1 of the same hard drive for core.img. core.img is at this location and looks in partition 1 for /boot/grub. => Grub2 (v1.99) is installed in the MBR of /dev/mapper/isw_chjbfeec_DougRaid and looks at sector 1 of the same hard drive for core.img. core.img is at this location and looks in partition 1 for /boot/grub. sda1: __________________________________________________________________________ File system: Boot sector type: Unknown Boot sector info: Mounting failed: mount: unknown filesystem type '' sda2: __________________________________________________________________________ File system: Boot sector type: Unknown Boot sector info: Mounting failed: mount: unknown filesystem type '' mount: unknown filesystem type '' sda3: __________________________________________________________________________ File system: Extended Partition Boot sector type: Unknown Boot sector info: isw_chjbfeec_DougRaid1: ________________________________________________________ File system: ntfs Boot sector type: Grub2 (v1.99) Boot sector info: Grub2 (v1.99) is installed in the boot sector of isw_chjbfeec_DougRaid1 and looks at sector 3841862992 of the same hard drive for core.img. core.img is at this location and looks for (,msdos5)/boot/grub on this drive. No errors found in the Boot Parameter Block. Operating System: Boot files: /grldr /bootmgr /Boot/BCD /grldr isw_chjbfeec_DougRaid2: ________________________________________________________ File system: ntfs Boot sector type: Windows Vista/7: NTFS Boot sector info: No errors found in the Boot Parameter Block. Operating System: Windows 7 Boot files: /Windows/System32/winload.exe isw_chjbfeec_DougRaid3: ________________________________________________________ File system: Extended Partition Boot sector type: - Boot sector info: isw_chjbfeec_DougRaid5: ________________________________________________________ File system: ext4 Boot sector type: - Boot sector info: Operating System: Ubuntu 12.04 LTS Boot files: /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img isw_chjbfeec_DougRaid6: ________________________________________________________ File system: swap Boot sector type: - Boot sector info: ============================ Drive/Partition Info: ============================= Drive: sda _____________________________________________________________________ Partition Boot Start Sector End Sector # of Sectors Id System /dev/sda1 * 2,048 206,847 204,800 7 NTFS / exFAT / HPFS /dev/sda2 206,848 3,686,402,047 3,686,195,200 7 NTFS / exFAT / HPFS /dev/sda3 3,686,402,558 3,907,039,743 220,637,186 5 Extended Invalid MBR Signature found. EBR refers to a location outside the hard drive. /dev/sda2 ends after the last sector of /dev/sda /dev/sda3 ends after the last sector of /dev/sda Drive: isw_chjbfeec_DougRaid _____________________________________________________________________ Disk /dev/mapper/isw_chjbfeec_DougRaid: 2000.4 GB, 2000404348928 bytes 255 heads, 63 sectors/track, 243201 cylinders, total 3907039744 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes Partition Boot Start Sector End Sector # of Sectors Id System /dev/mapper/isw_chjbfeec_DougRaid1 * 2,048 206,847 204,800 7 NTFS / exFAT / HPFS /dev/mapper/isw_chjbfeec_DougRaid2 206,848 3,686,402,047 3,686,195,200 7 NTFS / exFAT / HPFS /dev/mapper/isw_chjbfeec_DougRaid3 3,686,402,558 3,907,039,743 220,637,186 5 Extended /dev/mapper/isw_chjbfeec_DougRaid5 3,686,402,560 3,881,876,479 195,473,920 83 Linux /dev/mapper/isw_chjbfeec_DougRaid6 3,881,876,992 3,907,039,743 25,162,752 82 Linux swap / Solaris "blkid" output: ________________________________________________________________ Device UUID TYPE LABEL /dev/mapper/isw_chjbfeec_DougRaid1 C89C73D19C73B910 ntfs Reservado pelo Sistema /dev/mapper/isw_chjbfeec_DougRaid2 6830883A3088116C ntfs /dev/mapper/isw_chjbfeec_DougRaid5 bbab868a-ea53-4be3-ba7d-2737fe6cb24c ext4 /dev/mapper/isw_chjbfeec_DougRaid6 7a830a3c-88fb-4cba-80dc-f32e08abfd5b swap /dev/sda isw_raid_member /dev/sdb isw_raid_member /dev/sr0 iso9660 Windows7x86x64SK ========================= "ls -R /dev/mapper/" output: ========================= /dev/mapper: control isw_chjbfeec_DougRaid isw_chjbfeec_DougRaid1 isw_chjbfeec_DougRaid2 isw_chjbfeec_DougRaid3 isw_chjbfeec_DougRaid5 isw_chjbfeec_DougRaid6 ================================ Mount points: ================================= Device Mount_Point Type Options /dev/mapper/isw_chjbfeec_DougRaid5 / ext4 (rw,errors=remount-ro) /dev/sr0 /media/Windows7x86x64SK iso9660 (ro,nosuid,nodev,uid=1000,gid=1000,iocharset=utf8,mode=0400,dmode=0500,uhelper=udisks) ================= isw_chjbfeec_DougRaid1/grldr embedded menu: ================== -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- ================== isw_chjbfeec_DougRaid5/boot/grub/grub.cfg: ================== -------------------------------------------------------------------------------- # # DO NOT EDIT THIS FILE # # It is automatically generated by grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### if [ -s $prefix/grubenv ]; then set have_grubenv=true load_env fi set default="0" if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi } function load_video { insmod vbe insmod vga insmod video_bochs insmod video_cirrus } insmod part_msdos insmod ext2 set root='(/dev/mapper/isw_chjbfeec_DougRaid3,msdos1)' search --no-floppy --fs-uuid --set=root bbab868a-ea53-4be3-ba7d-2737fe6cb24c if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=auto load_video insmod gfxterm insmod part_msdos insmod ext2 set root='(/dev/mapper/isw_chjbfeec_DougRaid3,msdos1)' search --no-floppy --fs-uuid --set=root bbab868a-ea53-4be3-ba7d-2737fe6cb24c set locale_dir=($root)/boot/grub/locale set lang=en_US insmod gettext fi terminal_output gfxterm if [ "${recordfail}" = 1 ]; then set timeout=-1 else set timeout=10 fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/light-gray if background_color 44,0,30; then clear fi ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### function gfxmode { set gfxpayload="$1" if [ "$1" = "keep" ]; then set vt_handoff=vt.handoff=7 else set vt_handoff= fi } if [ ${recordfail} != 1 ]; then if [ -e ${prefix}/gfxblacklist.txt ]; then if hwmatch ${prefix}/gfxblacklist.txt 3; then if [ ${match} = 0 ]; then set linux_gfx_mode=keep else set linux_gfx_mode=text fi else set linux_gfx_mode=text fi else set linux_gfx_mode=keep fi else set linux_gfx_mode=text fi export linux_gfx_mode if [ "$linux_gfx_mode" != "text" ]; then load_video; fi menuentry 'Ubuntu, with Linux 3.2.0-24-generic-pae' --class ubuntu --class gnu-linux --class gnu --class os { recordfail gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='(/dev/mapper/isw_chjbfeec_DougRaid3,msdos1)' search --no-floppy --fs-uuid --set=root bbab868a-ea53-4be3-ba7d-2737fe6cb24c linux /boot/vmlinuz-3.2.0-24-generic-pae root=UUID=bbab868a-ea53-4be3-ba7d-2737fe6cb24c ro quiet splash $vt_handoff initrd /boot/initrd.img-3.2.0-24-generic-pae } menuentry 'Ubuntu, with Linux 3.2.0-24-generic-pae (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod gzio insmod part_msdos insmod ext2 set root='(/dev/mapper/isw_chjbfeec_DougRaid3,msdos1)' search --no-floppy --fs-uuid --set=root bbab868a-ea53-4be3-ba7d-2737fe6cb24c echo 'Loading Linux 3.2.0-24-generic-pae ...' linux /boot/vmlinuz-3.2.0-24-generic-pae root=UUID=bbab868a-ea53-4be3-ba7d-2737fe6cb24c ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.2.0-24-generic-pae } submenu "Previous Linux versions" { menuentry 'Ubuntu, with Linux 3.2.0-23-generic-pae' --class ubuntu --class gnu-linux --class gnu --class os { recordfail gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='(/dev/mapper/isw_chjbfeec_DougRaid3,msdos1)' search --no-floppy --fs-uuid --set=root bbab868a-ea53-4be3-ba7d-2737fe6cb24c linux /boot/vmlinuz-3.2.0-23-generic-pae root=UUID=bbab868a-ea53-4be3-ba7d-2737fe6cb24c ro quiet splash $vt_handoff initrd /boot/initrd.img-3.2.0-23-generic-pae } menuentry 'Ubuntu, with Linux 3.2.0-23-generic-pae (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod gzio insmod part_msdos insmod ext2 set root='(/dev/mapper/isw_chjbfeec_DougRaid3,msdos1)' search --no-floppy --fs-uuid --set=root bbab868a-ea53-4be3-ba7d-2737fe6cb24c echo 'Loading Linux 3.2.0-23-generic-pae ...' linux /boot/vmlinuz-3.2.0-23-generic-pae root=UUID=bbab868a-ea53-4be3-ba7d-2737fe6cb24c ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.2.0-23-generic-pae } } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/20_memtest86+ ### menuentry "Memory test (memtest86+)" { insmod part_msdos insmod ext2 set root='(/dev/mapper/isw_chjbfeec_DougRaid3,msdos1)' search --no-floppy --fs-uuid --set=root bbab868a-ea53-4be3-ba7d-2737fe6cb24c linux16 /boot/memtest86+.bin } menuentry "Memory test (memtest86+, serial console 115200)" { insmod part_msdos insmod ext2 set root='(/dev/mapper/isw_chjbfeec_DougRaid3,msdos1)' search --no-floppy --fs-uuid --set=root bbab868a-ea53-4be3-ba7d-2737fe6cb24c linux16 /boot/memtest86+.bin console=ttyS0,115200n8 } ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober_proxy ### menuentry "Windows 7 (loader) (on /dev/mapper/isw_chjbfeec_DougRaid1)" --class windows --class os { insmod part_msdos insmod ntfs set root='(sda,msdos1)' search --no-floppy --fs-uuid --set=root C89C73D19C73B910 chainloader +1 } ### END /etc/grub.d/30_os-prober_proxy ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### ### BEGIN /etc/grub.d/41_custom ### if [ -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ### END /etc/grub.d/41_custom ### -------------------------------------------------------------------------------- ====================== isw_chjbfeec_DougRaid5/etc/fstab: ======================= -------------------------------------------------------------------------------- # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 /dev/mapper/isw_chjbfeec_DougRaid5 / ext4 errors=remount-ro 0 1 /dev/mapper/isw_chjbfeec_DougRaid6 none swap sw 0 0 -------------------------------------------------------------------------------- ========== isw_chjbfeec_DougRaid5: Location of files loaded by Grub: =========== GiB - GB File Fragment(s) = boot/grub/core.img 1 = boot/grub/grub.cfg 1 = boot/initrd.img-3.2.0-23-generic-pae 2 = boot/initrd.img-3.2.0-24-generic-pae 2 = boot/vmlinuz-3.2.0-23-generic-pae 1 = boot/vmlinuz-3.2.0-24-generic-pae 1 = initrd.img 2 = initrd.img.old 2 = vmlinuz 1 = vmlinuz.old 1 ======================== Unknown MBRs/Boot Sectors/etc: ======================== Unknown BootLoader on sda1 Unknown BootLoader on sda2 Unknown BootLoader on sda3 =============================== StdErr Messages: =============================== xz: (stdin): Compressed data is corrupt xz: (stdin): Compressed data is corrupt hexdump: /dev/sda1: No such file or directory hexdump: /dev/sda1: No such file or directory hexdump: /dev/sda2: No such file or directory hexdump: /dev/sda2: No such file or directory hexdump: /dev/sda3: No such file or directory hexdump: /dev/sda3: No such file or directory xz: (stdin): Compressed data is corrupt awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in awk: cmd. line:36: Math support is not compiled in How we can see the Windows part at grub is: menuentry "Windows 7 (loader) (on /dev/mapper/isw_chjbfeec_DougRaid1)" --class windows --class os { insmod part_msdos insmod ntfs set root='(sda,msdos1)' search --no-floppy --fs-uuid --set=root C89C73D19C73B910 chainloader +1 } I tried a lot of combinations at the line: set root='(sda,msdos1)' , but no success I tried to change uuid to the /dev/mapper/isw_chjbfeec_DougRaid2 uuid, but the grub reports a error. I dont know what to do now. I really need to boot my windows partition. Someone knows what to do? Thanks........

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• Using Visual Studio as a Task-Focused IDE

  - by Jay Stevens

  Are there patterns or libraries or any official Microsoft SDK for using Visual Studio as a specifically Task-Focused UI? For example, both Revolution R (IDE for the R language) and SQL 2012 (and I think SQL 2008 and possibly 2005) use Visual Studio as the underlying IDE framework. Is there an officially supported SDK and/or examples/samples for doing this type of thing? I am building a language Parser for an existing language - whose only available IDE is INSANELY expensive - using Irony (and eventually will generate a Language Service as well). Any direct or indirect suggestions/answers are appreciated.

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• How to resolve the "Failed to download repository" error?

  - by jojo

  I've tried to update but then I got this error Here's the error information in that box: W:GPG error: http://extras.ubuntu.com precise Release: The following signatures were invalid: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing Key <[email protected]>, W:Failed to fetch http://ppa.launchpad.net/unity-team/hud/ubuntu/dists/precise/main/source/Sources 404 Not Found, W:Failed to fetch http://ppa.launchpad.net/unity-team/hud/ubuntu/dists/precise/main/binary-i386/Packages 404 Not Found, E:Some index files failed to download. They have been ignored, or old ones used instead. And my Internet connection is working fine. After trying $ sudo apt-get install ppa-purge Reading package lists... Done Building dependency tree Reading state information... Done ppa-purge is already the newest version. The following packages were automatically installed and are no longer required: language-pack-zh-hans language-pack-kde-en language-pack-kde-zh-hans language-pack-kde-en-base kde-l10n-engb kde-l10n-zhcn language-pack-zh-hans-base firefox-locale-zh-hans language-pack-kde-zh-hans-base Use 'apt-get autoremove' to remove them. 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. $ sudo ppa-purge ppa:unity-team/hud Updating packages lists W: GPG error: http://extras.ubuntu.com precise Release: The following signatures were invalid: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing Key <[email protected]> W: Failed to fetch http://ppa.launchpad.net/unity-team/hud/ubuntu/dists/precise/main/source/Sources 404 Not Found W: Failed to fetch http://ppa.launchpad.net/unity-team/hud/ubuntu/dists/precise/main/binary-i386/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead. Warning: apt-get update failed for some reason PPA to be removed: unity-team hud Warning: Could not find package list for PPA: unity-team hud I've tried $ sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 16126D3A3E5C1192 Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /tmp/tmp.v6Ucus0B10 --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --recv-keys --keyserver keyserver.ubuntu.com 16126D3A3E5C1192 gpg: requesting key 3E5C1192 from hkp server keyserver.ubuntu.com gpg: key 3E5C1192: "Ubuntu Extras Archive Automatic Signing Key <[email protected]>" not changed gpg: Total number processed: 1 gpg: unchanged: 1 And then started the same procedure but of no use.

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• Which useful alternative control structures do you know?

  - by bigown

  Similar question was closed on SO. Sometimes when we're programming, we find that some particular control structure would be very useful to us, but is not directly available in our programming language. What alternative control structures do you think are a useful way of organizing computation? The goal here is to get new ways of thinking about structuring code, in order to improve chunking and reasoning. You can create a wishful syntax/semantic not available now or cite a less known control structure on an existent programming language. Answers should give ideas for a new programming language or enhancing an actual language. Think of this as brainstorming, so post something you think is a crazy idea but it can be viable in some scenario. It's about imperative programming.

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• First 10 programs in a new scripting languge

  - by pro_metedor

  When a peron is learning a new scripting language like: bash python perl pike What kind of simple (yet practical) problem solutions to get through to make say that a person is comprehend with this scripting language enough to approach some complex yet still practical problems encountered in everyday job. In other words, which problems would you give that person to solve to make sure that he/she is familiar with the scripting language.

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• Why enumerator structs are a really bad idea

  - by Simon Cooper

  If you've ever poked around the .NET class libraries in Reflector, I'm sure you would have noticed that the generic collection classes all have implementations of their IEnumerator as a struct rather than a class. As you will see, this design decision has some rather unfortunate side effects... As is generally known in the .NET world, mutable structs are a Very Bad Idea; and there are several other blogs around explaining this (Eric Lippert's blog post explains the problem quite well). In the BCL, the generic collection enumerators are all mutable structs, as they need to keep track of where they are in the collection. This bit me quite hard when I was coding a wrapper around a LinkedList<int>.Enumerator. It boils down to this code: sealed class EnumeratorWrapper : IEnumerator<int> { private readonly LinkedList<int>.Enumerator m_Enumerator; public EnumeratorWrapper(LinkedList<int> linkedList) { m_Enumerator = linkedList.GetEnumerator(); } public int Current { get { return m_Enumerator.Current; } } object System.Collections.IEnumerator.Current { get { return Current; } } public bool MoveNext() { return m_Enumerator.MoveNext(); } public void Reset() { ((System.Collections.IEnumerator)m_Enumerator).Reset(); } public void Dispose() { m_Enumerator.Dispose(); } } The key line here is the MoveNext method. When I initially coded this, I thought that the call to m_Enumerator.MoveNext() would alter the enumerator state in the m_Enumerator class variable and so the enumeration would proceed in an orderly fashion through the collection. However, when I ran this code it went into an infinite loop - the m_Enumerator.MoveNext() call wasn't actually changing the state in the m_Enumerator variable at all, and my code was looping forever on the first collection element. It was only after disassembling that method that I found out what was going on The MoveNext method above results in the following IL: .method public hidebysig newslot virtual final instance bool MoveNext() cil managed { .maxstack 1 .locals init ( [0] bool CS$1$0000, [1] valuetype [System]System.Collections.Generic.LinkedList`1/Enumerator CS$0$0001) L_0000: nop L_0001: ldarg.0 L_0002: ldfld valuetype [System]System.Collections.Generic.LinkedList`1/Enumerator EnumeratorWrapper::m_Enumerator L_0007: stloc.1 L_0008: ldloca.s CS$0$0001 L_000a: call instance bool [System]System.Collections.Generic.LinkedList`1/Enumerator::MoveNext() L_000f: stloc.0 L_0010: br.s L_0012 L_0012: ldloc.0 L_0013: ret } Here, the important line is 0002 - m_Enumerator is accessed using the ldfld operator, which does the following: Finds the value of a field in the object whose reference is currently on the evaluation stack. So, what the MoveNext method is doing is the following: public bool MoveNext() { LinkedList<int>.Enumerator CS$0$0001 = this.m_Enumerator; bool CS$1$0000 = CS$0$0001.MoveNext(); return CS$1$0000; } The enumerator instance being modified by the call to MoveNext is the one stored in the CS$0$0001 variable on the stack, and not the one in the EnumeratorWrapper class instance. Hence why the state of m_Enumerator wasn't getting updated. Hmm, ok. Well, why is it doing this? If you have a read of Eric Lippert's blog post about this issue, you'll notice he quotes a few sections of the C# spec. In particular, 7.5.4: ...if the field is readonly and the reference occurs outside an instance constructor of the class in which the field is declared, then the result is a value, namely the value of the field I in the object referenced by E. And my m_Enumerator field is readonly! Indeed, if I remove the readonly from the class variable then the problem goes away, and the code works as expected. The IL confirms this: .method public hidebysig newslot virtual final instance bool MoveNext() cil managed { .maxstack 1 .locals init ( [0] bool CS$1$0000) L_0000: nop L_0001: ldarg.0 L_0002: ldflda valuetype [System]System.Collections.Generic.LinkedList`1/Enumerator EnumeratorWrapper::m_Enumerator L_0007: call instance bool [System]System.Collections.Generic.LinkedList`1/Enumerator::MoveNext() L_000c: stloc.0 L_000d: br.s L_000f L_000f: ldloc.0 L_0010: ret } Notice on line 0002, instead of the ldfld we had before, we've got a ldflda, which does this: Finds the address of a field in the object whose reference is currently on the evaluation stack. Instead of loading the value, we're loading the address of the m_Enumerator field. So now the call to MoveNext modifies the enumerator stored in the class rather than on the stack, and everything works as expected. Previously, I had thought enumerator structs were an odd but interesting feature of the BCL that I had used in the past to do linked list slices. However, effects like this only underline how dangerous mutable structs are, and I'm at a loss to explain why the enumerators were implemented as structs in the first place. (interestingly, the SortedList<TKey, TValue> enumerator is a struct but is private, which makes it even more odd - the only way it can be accessed is as a boxed IEnumerator!). I would love to hear people's theories as to why the enumerators are implemented in such a fashion. And bonus points if you can explain why LinkedList<int>.Enumerator.Reset is an explicit implementation but Dispose is implicit... Note to self: never ever ever code a mutable struct.

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• How do you visually represent programming skills?

  - by TomSchober

  I had a discussion with a recruiter recently that made me wish I could visually represent programming skills. In trying to explain how skills relate, what are the important properties of those skills? Would a tagging model work (i.e. "Design Pattern," "Programming Language," "IDE," or "VCS")? Are they really hierarchical? Clarification: The real problem I see is communicating the level of granularity among skill sets. For instance saying someone "knows Java" is a uselessly broad term in describing what someone can DO. However saying they know how to write web services with the Java Programming language is a bit better. To go even further, saying they know Spring as a tool under all that is probably specific enough. What should we call those levels of granularity? What are the relationships between the terms we use? i.e. Framework to Language, Tool to Language, Framework to Solution(like web services), etc.

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• Using ext4 in VMware machine

  First of all, using a journaling filesystems like NTFS, ext4, XFS, or JFS (not to name all of them) is a very good idea and nowadays unthinkable not to do. Linux offers a good variety of different option as journaling filesystem for your system. Since years I am using SGI's XFS and I am pretty confident with stability, performance and liability of the system. In earlier years I had to struggle with incompatibilities between XFS and the boot loader. Using an ext2 formatted /boot solved this issue. But, wow, that is ages ago! Lately, I had to setup a fresh Lucid Lynx (Ubuntu 10.04 LTS) system for a change of our internal groupware / messaging system. Therefore, I fired up a new virtual machine with almost standard configuration in VMware Server and run through our network-based PXE boot and installation procedure. At a certain step in this process, Ubuntu asks you about the partitioning of your hard drive(s). Honestly, I have to say that only out of curiousity I sticked to the "default" suggestion and gave my faith and trust into the Ubuntu installation routine... Resulting to have an ext4 based root mount point ( / ). The rest of the installation went on without further concerns or worries. Note:I really can't remember why I chose to go away from my favourite... Well, it should turn out to be the wrong decision after all. Ok, let's continue the story about ext4 in a VMware based virtual machine. After some hours installing additional packages and configuring the new system using LDAP for general authentication and login, I had an "out-of-the-box" usable enterprise messaging system based on Zarafa 6.40 Community Edition inclusive proper SSL-based Webaccess interface and Z-Push extension for ActiveSync with my Nokia mobile. Straightforward and pretty nice for the time spent on the setup. Having priority on other tasks I let the system just running and didn't pay any further attention at all. Until I run into an upgrade of "Mail for Exchange" on Symbian OS. My mobile did not bother me at all with the upgrade and everything went smooth, but trying to re-establish the ActiveSync connection to the Zarafa messaging system resulted in a frustating situation. So, I shifted my focus back to the Linux system and I was amazed to figure out that the root had been remounted readonly due to hard drive failures or at least ext4 reported errors. Firing up Google only confirmed my concerns and it seems that using ext4 for VMware based virtual machines does not look like a stable and reliable candidate to me. You might consider reading those external resources: ext4 fs corruption under VMWare Server 2.01Bug #389555 - ext4 filesystem corruption Well, I learned my lesson and ext{2|3|4} based filesystems are not going to be used on any of my Linux systems or customer installations in the future. Addendum: I did not try this setup in other virtualization environments like VirtualBox, qemu, kvm, Xen, etc.

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• In Ubuntu 13.10, none of the hotkeys of LibreOffice works in non-English keyboard layout

  - by maqtanim

  In Ubuntu 13.10, the hotkeys/shortcut-keys (Ctrl+b, Ctrl+s etc) in LibreOffice are language dependent and work in English language only. While writing in any other language (i.e. any Cyrillic and/or any Bengali etc) it's impossible to use hotkeys, they just don't do anything. Switching to English input language enable hotkeys once again. This is very frustrating as user needs to switch language to save document, to make it bold, or italic, etc. This was not experienced in Ubuntu 13.04. Steps to reproduce: System Settings Text Entry. Add another keyboard layout beside English [In my case it is Bengali (Probhat)] Now launch Writer. Switch the keyboard layout from English (US) to Bengali (Probhat) by pressing Ctrl+Space. Press Ctrl+B to change font weight to bold. Error: Font weight does not get changed. Expected: Font weight should change to bold. Note: none other system hotkeys work as expected. I.e. Ctrl+s to save, or Ctrl+b to subscript, or Ctrl+i to italic etc. Workaround: The only way is to - change the keyboard layout to English then press desired hotkey then switch keyboard layout back to Bengali. The issue is critical, as it make writer very slow for keyboard-only typing.

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