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• Access to related Objects inside a model propery

  - by aliem

  Hi, I just run into some problems with django models. Example code is better than any word: class Cart(models.Model): updated_at = models.DateTimeField(auto_now=True) created_at = models.DateTimeField(auto_now_add=True) def __unicode__(self): return u'date %s;'%(self.created_at) def __str__(self): return self.__unicode__() def _total_items(self): """ Totale n di oggetti """ a = 0 for i in self.items.all: a += i.quantity return a total_items = property(_total_items) class Item(models.Model): cart = models.ForeignKey(Cart) quantity = models.PositiveIntegerField() def __unicode__(self): return u'product %s'%(self.id) def __str__(self): return self.__unicode__() but, when i call the cart property here's what i get in the python console: >>> a.total_items Traceback (most recent call last): File "<console>", line 1, in <module> File "models.py", line 49, in _total_items for i in self.item_set.all: TypeError: 'RelatedManager' object is not callable

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• Tied up with injection implemented with setter functions

  - by puudeli

  Hi, I'm trying to use Scala as part of an existing Java application and now I run into an issue with dependencies injected with a setter method (no DI frameworks in this part of code). How is this handled in a Scala way? In Scala both val and var require to be initialized when declared but I can't do that, since the Java setters inject objects that implement a certain interface and interfaces are abstract and can not be instantiated. class ScalaLogic { var service // How to initialize? def setService (srv: OutputService) = { service = srv } Is there a way to initialize the var service so that I can later assign a dependency into it? It should be lexically scoped to be visible in the whole class.

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• NoSQL with RavenDB and ASP.NET MVC - Part 1

  - by shiju

   A while back, I have blogged NoSQL with MongoDB, NoRM and ASP.NET MVC Part 1 and Part 2 on how to use MongoDB with an ASP.NET MVC application. The NoSQL movement is getting big attention and RavenDB is the latest addition to the NoSQL and document database world. RavenDB is an Open Source (with a commercial option) document database for the .NET/Windows platform developed  by Ayende Rahien.  Raven stores schema-less JSON documents, allow you to define indexes using Linq queries and focus on low latency and high performance. RavenDB is .NET focused document database which comes with a fully functional .NET client API  and supports LINQ. RavenDB comes with two components, a server and a client API. RavenDB is a REST based system, so you can write your own HTTP cleint API. As a .NET developer, RavenDB is becoming my favorite document database. Unlike other document databases, RavenDB is supports transactions using System.Transactions. Also it's supports both embedded and server mode of database. You can access RavenDB site at http://ravendb.netA demo App with ASP.NET MVCLet's create a simple demo app with RavenDB and ASP.NET MVC. To work with RavenDB, do the following steps. Go to http://ravendb.net/download and download the latest build.Unzip the downloaded file.Go to the /Server directory and run the RavenDB.exe. This will start the RavenDB server listening on localhost:8080You can change the port of RavenDB  by modifying the "Raven/Port" appSetting value in the RavenDB.exe.config file.When running the RavenDB, it will automatically create a database in the /Data directory. You can change the directory name data by modifying "Raven/DataDirt" appSetting value in the RavenDB.exe.config file.RavenDB provides a browser based admin tool. When the Raven server is running, You can be access the browser based admin tool and view and edit documents and index using your browser admin tool. The web admin tool available at http://localhost:8080The below is the some screen shots of web admin tool     Working with ASP.NET MVC  To working with RavenDB in our demo ASP.NET MVC application, do the following steps Step 1 - Add reference to Raven Cleint API In our ASP.NET MVC application, Add a reference to the Raven.Client.Lightweight.dll from the Client directory. Step 2 - Create DocumentStoreThe document store would be created once per application. Let's create a DocumentStore on application start-up in the Global.asax.cs. documentStore = new DocumentStore { Url = "http://localhost:8080/" }; documentStore.Initialise(); The above code will create a Raven DB document store and will be listening the server locahost at port 8080    Step 3 - Create DocumentSession on BeginRequest   Let's create a DocumentSession on BeginRequest event in the Global.asax.cs. We are using the document session for every unit of work. In our demo app, every HTTP request would be a single Unit of Work (UoW). BeginRequest += (sender, args) =>   HttpContext.Current.Items[RavenSessionKey] = documentStore.OpenSession(); Step 4 - Destroy the DocumentSession on EndRequest  EndRequest += (o, eventArgs) => {     var disposable = HttpContext.Current.Items[RavenSessionKey] as IDisposable;     if (disposable != null)         disposable.Dispose(); };  At the end of HTTP request, we are destroying the DocumentSession  object.The below  code block shown all the code in the Global.asax.cs  private const string RavenSessionKey = "RavenMVC.Session"; private static DocumentStore documentStore;   protected void Application_Start() { //Create a DocumentStore in Application_Start //DocumentStore should be created once per application and stored as a singleton. documentStore = new DocumentStore { Url = "http://localhost:8080/" }; documentStore.Initialise(); AreaRegistration.RegisterAllAreas(); RegisterRoutes(RouteTable.Routes); //DI using Unity 2.0 ConfigureUnity(); }   public MvcApplication() { //Create a DocumentSession on BeginRequest   //create a document session for every unit of work BeginRequest += (sender, args) =>     HttpContext.Current.Items[RavenSessionKey] = documentStore.OpenSession(); //Destroy the DocumentSession on EndRequest EndRequest += (o, eventArgs) => { var disposable = HttpContext.Current.Items[RavenSessionKey] as IDisposable; if (disposable != null) disposable.Dispose(); }; }   //Getting the current DocumentSession public static IDocumentSession CurrentSession {   get { return (IDocumentSession)HttpContext.Current.Items[RavenSessionKey]; } }  We have setup all necessary code in the Global.asax.cs for working with RavenDB. For our demo app, Let’s write a domain class  public class Category {       public string Id { get; set; }       [Required(ErrorMessage = "Name Required")]     [StringLength(25, ErrorMessage = "Must be less than 25 characters")]     public string Name { get; set;}     public string Description { get; set; }   } We have created simple domain entity Category. Let's create repository class for performing CRUD operations against our domain entity Category.  public interface ICategoryRepository {     Category Load(string id);     IEnumerable<Category> GetCategories();     void Save(Category category);     void Delete(string id);       }    public class CategoryRepository : ICategoryRepository {     private IDocumentSession session;     public CategoryRepository()     {             session = MvcApplication.CurrentSession;     }     //Load category based on Id     public Category Load(string id)     {         return session.Load<Category>(id);     }     //Get all categories     public IEnumerable<Category> GetCategories()     {         var categories= session.LuceneQuery<Category>()                 .WaitForNonStaleResults()             .ToArray();         return categories;       }     //Insert/Update category     public void Save(Category category)     {         if (string.IsNullOrEmpty(category.Id))         {             //insert new record             session.Store(category);         }         else         {             //edit record             var categoryToEdit = Load(category.Id);             categoryToEdit.Name = category.Name;             categoryToEdit.Description = category.Description;         }         //save the document session         session.SaveChanges();     }     //delete a category     public void Delete(string id)     {         var category = Load(id);         session.Delete<Category>(category);         session.SaveChanges();     }        } For every CRUD operations, we are taking the current document session object from HttpContext object. session = MvcApplication.CurrentSession; We are calling the static method CurrentSession from the Global.asax.cs public static IDocumentSession CurrentSession {     get { return (IDocumentSession)HttpContext.Current.Items[RavenSessionKey]; } }  Retrieve Entities  The Load method get the single Category object based on the Id. RavenDB is working based on the REST principles and the Id would be like categories/1. The Id would be created by automatically when a new object is inserted to the document store. The REST uri categories/1 represents a single category object with Id representation of 1.   public Category Load(string id) {    return session.Load<Category>(id); } The GetCategories method returns all the categories calling the session.LuceneQuery method. RavenDB is using a lucen query syntax for querying. I will explain more details about querying and indexing in my future posts.   public IEnumerable<Category> GetCategories() {     var categories= session.LuceneQuery<Category>()             .WaitForNonStaleResults()         .ToArray();     return categories;   } Insert/Update entityFor insert/Update a Category entity, we have created Save method in repository class. If  the Id property of Category is null, we call Store method of Documentsession for insert a new record. For editing a existing record, we load the Category object and assign the values to the loaded Category object. The session.SaveChanges() will save the changes to document store.  //Insert/Update category public void Save(Category category) {     if (string.IsNullOrEmpty(category.Id))     {         //insert new record         session.Store(category);     }     else     {         //edit record         var categoryToEdit = Load(category.Id);         categoryToEdit.Name = category.Name;         categoryToEdit.Description = category.Description;     }     //save the document session     session.SaveChanges(); }  Delete Entity  In the Delete method, we call the document session's delete method and call the SaveChanges method to reflect changes in the document store.  public void Delete(string id) {     var category = Load(id);     session.Delete<Category>(category);     session.SaveChanges(); }  Let’s create ASP.NET MVC controller and controller actions for handling CRUD operations for the domain class Category  public class CategoryController : Controller { private ICategoryRepository categoyRepository; //DI enabled constructor public CategoryController(ICategoryRepository categoyRepository) {     this.categoyRepository = categoyRepository; } public ActionResult Index() {         var categories = categoyRepository.GetCategories();     if (categories == null)         return RedirectToAction("Create");     return View(categories); }   [HttpGet] public ActionResult Edit(string id) {     var category = categoyRepository.Load(id);         return View("Save",category); } // GET: /Category/Create [HttpGet] public ActionResult Create() {     var category = new Category();     return View("Save", category); } [HttpPost] public ActionResult Save(Category category) {     if (!ModelState.IsValid)     {         return View("Save", category);     }           categoyRepository.Save(category);         return RedirectToAction("Index");     }        [HttpPost] public ActionResult Delete(string id) {     categoyRepository.Delete(id);     var categories = categoyRepository.GetCategories();     return PartialView("CategoryList", categories);      }        }  RavenDB is an awesome document database and I hope that it will be the winner in .NET space of document database world.  The source code of demo application available at http://ravenmvc.codeplex.com/

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• Announcing release of ASP.NET MVC 3, IIS Express, SQL CE 4, Web Farm Framework, Orchard, WebMatrix

  - by ScottGu

  I’m excited to announce the release today of several products: ASP.NET MVC 3 NuGet IIS Express 7.5 SQL Server Compact Edition 4 Web Deploy and Web Farm Framework 2.0 Orchard 1.0 WebMatrix 1.0 The above products are all free. They build upon the .NET 4 and VS 2010 release, and add a ton of additional value to ASP.NET (both Web Forms and MVC) and the Microsoft Web Server stack. ASP.NET MVC 3 Today we are shipping the final release of ASP.NET MVC 3.  You can download and install ASP.NET MVC 3 here.  The ASP.NET MVC 3 source code (released under an OSI-compliant open source license) can also optionally be downloaded here. ASP.NET MVC 3 is a significant update that brings with it a bunch of great features.  Some of the improvements include: Razor ASP.NET MVC 3 ships with a new view-engine option called “Razor” (in addition to continuing to support/enhance the existing .aspx view engine).  Razor minimizes the number of characters and keystrokes required when writing a view template, and enables a fast, fluid coding workflow. Unlike most template syntaxes, with Razor you do not need to interrupt your coding to explicitly denote the start and end of server blocks within your HTML. The Razor parser is smart enough to infer this from your code. This enables a compact and expressive syntax which is clean, fast and fun to type.  You can learn more about Razor from some of the blog posts I’ve done about it over the last 6 months Introducing Razor New @model keyword in Razor Layouts with Razor Server-Side Comments with Razor Razor’s @: and <text> syntax Implicit and Explicit code nuggets with Razor Layouts and Sections with Razor Today’s release supports full code intellisense support for Razor (both VB and C#) with Visual Studio 2010 and the free Visual Web Developer 2010 Express. JavaScript Improvements ASP.NET MVC 3 enables richer JavaScript scenarios and takes advantage of emerging HTML5 capabilities. The AJAX and Validation helpers in ASP.NET MVC 3 now use an Unobtrusive JavaScript based approach.  Unobtrusive JavaScript avoids injecting inline JavaScript into HTML, and enables cleaner separation of behavior using the new HTML 5 “data-“ attribute convention (which conveniently works on older browsers as well – including IE6). This keeps your HTML tight and clean, and makes it easier to optionally swap out or customize JS libraries.  ASP.NET MVC 3 now includes built-in support for posting JSON-based parameters from client-side JavaScript to action methods on the server.  This makes it easier to exchange data across the client and server, and build rich JavaScript front-ends.  We think this capability will be particularly useful going forward with scenarios involving client templates and data binding (including the jQuery plugins the ASP.NET team recently contributed to the jQuery project).  Previous releases of ASP.NET MVC included the core jQuery library.  ASP.NET MVC 3 also now ships the jQuery Validate plugin (which our validation helpers use for client-side validation scenarios).  We are also now shipping and including jQuery UI by default as well (which provides a rich set of client-side JavaScript UI widgets for you to use within projects). Improved Validation ASP.NET MVC 3 includes a bunch of validation enhancements that make it even easier to work with data. Client-side validation is now enabled by default with ASP.NET MVC 3 (using an onbtrusive javascript implementation).  Today’s release also includes built-in support for Remote Validation - which enables you to annotate a model class with a validation attribute that causes ASP.NET MVC to perform a remote validation call to a server method when validating input on the client. The validation features introduced within .NET 4’s System.ComponentModel.DataAnnotations namespace are now supported by ASP.NET MVC 3.  This includes support for the new IValidatableObject interface – which enables you to perform model-level validation, and allows you to provide validation error messages specific to the state of the overall model, or between two properties within the model.  ASP.NET MVC 3 also supports the improvements made to the ValidationAttribute class in .NET 4.  ValidationAttribute now supports a new IsValid overload that provides more information about the current validation context, such as what object is being validated.  This enables richer scenarios where you can validate the current value based on another property of the model.  We’ve shipped a built-in [Compare] validation attribute  with ASP.NET MVC 3 that uses this support and makes it easy out of the box to compare and validate two property values. You can use any data access API or technology with ASP.NET MVC.  This past year, though, we’ve worked closely with the .NET data team to ensure that the new EF Code First library works really well for ASP.NET MVC applications.  These two posts of mine cover the latest EF Code First preview and demonstrates how to use it with ASP.NET MVC 3 to enable easy editing of data (with end to end client+server validation support).  The final release of EF Code First will ship in the next few weeks. Today we are also publishing the first preview of a new MvcScaffolding project.  It enables you to easily scaffold ASP.NET MVC 3 Controllers and Views, and works great with EF Code-First (and is pluggable to support other data providers).  You can learn more about it – and install it via NuGet today - from Steve Sanderson’s MvcScaffolding blog post. Output Caching Previous releases of ASP.NET MVC supported output caching content at a URL or action-method level. With ASP.NET MVC V3 we are also enabling support for partial page output caching – which allows you to easily output cache regions or fragments of a response as opposed to the entire thing.  This ends up being super useful in a lot of scenarios, and enables you to dramatically reduce the work your application does on the server.  The new partial page output caching support in ASP.NET MVC 3 enables you to easily re-use cached sub-regions/fragments of a page across multiple URLs on a site.  It supports the ability to cache the content either on the web-server, or optionally cache it within a distributed cache server like Windows Server AppFabric or memcached. I’ll post some tutorials on my blog that show how to take advantage of ASP.NET MVC 3’s new output caching support for partial page scenarios in the future. Better Dependency Injection ASP.NET MVC 3 provides better support for applying Dependency Injection (DI) and integrating with Dependency Injection/IOC containers. With ASP.NET MVC 3 you no longer need to author custom ControllerFactory classes in order to enable DI with Controllers.  You can instead just register a Dependency Injection framework with ASP.NET MVC 3 and it will resolve dependencies not only for Controllers, but also for Views, Action Filters, Model Binders, Value Providers, Validation Providers, and Model Metadata Providers that you use within your application. This makes it much easier to cleanly integrate dependency injection within your projects. Other Goodies ASP.NET MVC 3 includes dozens of other nice improvements that help to both reduce the amount of code you write, and make the code you do write cleaner.  Here are just a few examples: Improved New Project dialog that makes it easy to start new ASP.NET MVC 3 projects from templates. Improved Add->View Scaffolding support that enables the generation of even cleaner view templates. New ViewBag property that uses .NET 4’s dynamic support to make it easy to pass late-bound data from Controllers to Views. Global Filters support that allows specifying cross-cutting filter attributes (like [HandleError]) across all Controllers within an app. New [AllowHtml] attribute that allows for more granular request validation when binding form posted data to models. Sessionless controller support that allows fine grained control over whether SessionState is enabled on a Controller. New ActionResult types like HttpNotFoundResult and RedirectPermanent for common HTTP scenarios. New Html.Raw() helper to indicate that output should not be HTML encoded. New Crypto helpers for salting and hashing passwords. And much, much more… Learn More about ASP.NET MVC 3 We will be posting lots of tutorials and samples on the http://asp.net/mvc site in the weeks ahead.  Below are two good ASP.NET MVC 3 tutorials available on the site today: Build your First ASP.NET MVC 3 Application: VB and C# Building the ASP.NET MVC 3 Music Store We’ll post additional ASP.NET MVC 3 tutorials and videos on the http://asp.net/mvc site in the future. Visit it regularly to find new tutorials as they are published. How to Upgrade Existing Projects ASP.NET MVC 3 is compatible with ASP.NET MVC 2 – which means it should be easy to update existing MVC projects to ASP.NET MVC 3.  The new features in ASP.NET MVC 3 build on top of the foundational work we’ve already done with the MVC 1 and MVC 2 releases – which means that the skills, knowledge, libraries, and books you’ve acquired are all directly applicable with the MVC 3 release.  MVC 3 adds new features and capabilities – it doesn’t obsolete existing ones. You can upgrade existing ASP.NET MVC 2 projects by following the manual upgrade steps in the release notes.  Alternatively, you can use this automated ASP.NET MVC 3 upgrade tool to easily update your  existing projects. Localized Builds Today’s ASP.NET MVC 3 release is available in English.  We will be releasing localized versions of ASP.NET MVC 3 (in 9 languages) in a few days.  I’ll blog pointers to the localized downloads once they are available. NuGet Today we are also shipping NuGet – a free, open source, package manager that makes it easy for you to find, install, and use open source libraries in your projects. It works with all .NET project types (including ASP.NET Web Forms, ASP.NET MVC, WPF, WinForms, Silverlight, and Class Libraries).  You can download and install it here. NuGet enables developers who maintain open source projects (for example, .NET projects like Moq, NHibernate, Ninject, StructureMap, NUnit, Windsor, Raven, Elmah, etc) to package up their libraries and register them with an online gallery/catalog that is searchable.  The client-side NuGet tools – which include full Visual Studio integration – make it trivial for any .NET developer who wants to use one of these libraries to easily find and install it within the project they are working on. NuGet handles dependency management between libraries (for example: library1 depends on library2). It also makes it easy to update (and optionally remove) libraries from your projects later. It supports updating web.config files (if a package needs configuration settings). It also allows packages to add PowerShell scripts to a project (for example: scaffold commands). Importantly, NuGet is transparent and clean – and does not install anything at the system level. Instead it is focused on making it easy to manage libraries you use with your projects. Our goal with NuGet is to make it as simple as possible to integrate open source libraries within .NET projects.  NuGet Gallery This week we also launched a beta version of the http://nuget.org web-site – which allows anyone to easily search and browse an online gallery of open source packages available via NuGet.  The site also now allows developers to optionally submit new packages that they wish to share with others.  You can learn more about how to create and share a package here. There are hundreds of open-source .NET projects already within the NuGet Gallery today.  We hope to have thousands there in the future. IIS Express 7.5 Today we are also shipping IIS Express 7.5.  IIS Express is a free version of IIS 7.5 that is optimized for developer scenarios.  It works for both ASP.NET Web Forms and ASP.NET MVC project types. We think IIS Express combines the ease of use of the ASP.NET Web Server (aka Cassini) currently built-into Visual Studio today with the full power of IIS.  Specifically: It’s lightweight and easy to install (less than 5Mb download and a quick install) It does not require an administrator account to run/debug applications from Visual Studio It enables a full web-server feature set – including SSL, URL Rewrite, and other IIS 7.x modules It supports and enables the same extensibility model and web.config file settings that IIS 7.x support It can be installed side-by-side with the full IIS web server as well as the ASP.NET Development Server (they do not conflict at all) It works on Windows XP and higher operating systems – giving you a full IIS 7.x developer feature-set on all Windows OS platforms IIS Express (like the ASP.NET Development Server) can be quickly launched to run a site from a directory on disk.  It does not require any registration/configuration steps. This makes it really easy to launch and run for development scenarios.  You can also optionally redistribute IIS Express with your own applications if you want a lightweight web-server.  The standard IIS Express EULA now includes redistributable rights. Visual Studio 2010 SP1 adds support for IIS Express.  Read my VS 2010 SP1 and IIS Express blog post to learn more about what it enables.  SQL Server Compact Edition 4 Today we are also shipping SQL Server Compact Edition 4 (aka SQL CE 4).  SQL CE is a free, embedded, database engine that enables easy database storage. No Database Installation Required SQL CE does not require you to run a setup or install a database server in order to use it.  You can simply copy the SQL CE binaries into the \bin directory of your ASP.NET application, and then your web application can use it as a database engine.  No setup or extra security permissions are required for it to run. You do not need to have an administrator account on the machine. Just copy your web application onto any server and it will work. This is true even of medium-trust applications running in a web hosting environment. SQL CE runs in-memory within your ASP.NET application and will start-up when you first access a SQL CE database, and will automatically shutdown when your application is unloaded.  SQL CE databases are stored as files that live within the \App_Data folder of your ASP.NET Applications. Works with Existing Data APIs SQL CE 4 works with existing .NET-based data APIs, and supports a SQL Server compatible query syntax.  This means you can use existing data APIs like ADO.NET, as well as use higher-level ORMs like Entity Framework and NHibernate with SQL CE.  This enables you to use the same data programming skills and data APIs you know today. Supports Development, Testing and Production Scenarios SQL CE can be used for development scenarios, testing scenarios, and light production usage scenarios.  With the SQL CE 4 release we’ve done the engineering work to ensure that SQL CE won’t crash or deadlock when used in a multi-threaded server scenario (like ASP.NET).  This is a big change from previous releases of SQL CE – which were designed for client-only scenarios and which explicitly blocked running in web-server environments.  Starting with SQL CE 4 you can use it in a web-server as well. There are no license restrictions with SQL CE.  It is also totally free. Tooling Support with VS 2010 SP1 Visual Studio 2010 SP1 adds support for SQL CE 4 and ASP.NET Projects.  Read my VS 2010 SP1 and SQL CE 4 blog post to learn more about what it enables.  Web Deploy and Web Farm Framework 2.0 Today we are also releasing Microsoft Web Deploy V2 and Microsoft Web Farm Framework V2.  These services provide a flexible and powerful way to deploy ASP.NET applications onto either a single server, or across a web farm of machines. You can learn more about these capabilities from my previous blog posts on them: Introducing the Microsoft Web Farm Framework Automating Deployment with Microsoft Web Deploy Visit the http://iis.net website to learn more and install them. Both are free. Orchard 1.0 Today we are also releasing Orchard v1.0.  Orchard is a free, open source, community based project.  It provides Content Management System (CMS) and Blogging System support out of the box, and makes it possible to easily create and manage web-sites without having to write code (site owners can customize a site through the browser-based editing tools built-into Orchard).  Read these tutorials to learn more about how you can setup and manage your own Orchard site. Orchard itself is built as an ASP.NET MVC 3 application using Razor view templates (and by default uses SQL CE 4 for data storage).  Developers wishing to extend an Orchard site with custom functionality can open and edit it as a Visual Studio project – and add new ASP.NET MVC Controllers/Views to it.  WebMatrix 1.0 WebMatrix is a new, free, web development tool from Microsoft that provides a suite of technologies that make it easier to enable website development.  It enables a developer to start a new site by browsing and downloading an app template from an online gallery of web applications (which includes popular apps like Umbraco, DotNetNuke, Orchard, WordPress, Drupal and Joomla).  Alternatively it also enables developers to create and code web sites from scratch. WebMatrix is task focused and helps guide developers as they work on sites.  WebMatrix includes IIS Express, SQL CE 4, and ASP.NET - providing an integrated web-server, database and programming framework combination.  It also includes built-in web publishing support which makes it easy to find and deploy sites to web hosting providers. You can learn more about WebMatrix from my Introducing WebMatrix blog post this summer.  Visit http://microsoft.com/web to download and install it today. Summary I’m really excited about today’s releases – they provide a bunch of additional value that makes web development with ASP.NET, Visual Studio and the Microsoft Web Server a lot better.  A lot of folks worked hard to share this with you today. On behalf of my whole team – we hope you enjoy them! Scott P.S. In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu

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• How to handle "circular dependency" in dependency injection

  - by Roel

  The title says "Circular Dependency", but it is not the correct wording, because to me the design seems solid. However, consider the following scenario, where the blue parts are given from external partner, and orange is my own implementation. Also assume there is more then one ConcreteMain, but I want to use a specific one. (In reality, each class has some more dependencies, but I tried to simplify it here) I would like to instanciate all of this with Depency Injection (Unity), but I obviously get a StackOverflowException on the following code, because Runner tries to instantiate ConcreteMain, and ConcreteMain needs a Runner. IUnityContainer ioc = new UnityContainer(); ioc.RegisterType<IMain, ConcreteMain>() .RegisterType<IMainCallback, Runner>(); var runner = ioc.Resolve<Runner>(); How can I avouid this? Is there any way to structure this so that I can use it with DI? The scenario I'm doing now is setting everything up manually, but that puts a hard dependency on ConcreteMain in the class which instantiates it. This is what i'm trying to avoid (with Unity registrations in configuration). All source code below (very simplified example!); public class Program { public static void Main(string[] args) { IUnityContainer ioc = new UnityContainer(); ioc.RegisterType<IMain, ConcreteMain>() .RegisterType<IMainCallback, Runner>(); var runner = ioc.Resolve<Runner>(); Console.WriteLine("invoking runner..."); runner.DoSomethingAwesome(); Console.ReadLine(); } } public class Runner : IMainCallback { private readonly IMain mainServer; public Runner(IMain mainServer) { this.mainServer = mainServer; } public void DoSomethingAwesome() { Console.WriteLine("trying to do something awesome"); mainServer.DoSomething(); } public void SomethingIsDone(object something) { Console.WriteLine("hey look, something is finally done."); } } public interface IMain { void DoSomething(); } public interface IMainCallback { void SomethingIsDone(object something); } public abstract class AbstractMain : IMain { protected readonly IMainCallback callback; protected AbstractMain(IMainCallback callback) { this.callback = callback; } public abstract void DoSomething(); } public class ConcreteMain : AbstractMain { public ConcreteMain(IMainCallback callback) : base(callback){} public override void DoSomething() { Console.WriteLine("starting to do something..."); var task = Task.Factory.StartNew(() =>{ Thread.Sleep(5000);/*very long running task*/ }); task.ContinueWith(t => callback.SomethingIsDone(true)); } }

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• No HDMI audio in 13.04

  - by King84

  I have just upgraded from 12.10 to 13.04 and now everything works perfectly, except the fact that I have no audio via HDMI. I am using a Samsung tv-monitor connected via HDMI to my video card Asus EAH4670/DI/1GD3 (which has a Radeon HD 4670 gpu on it), installed phisically into my motherboard which is a MSI 770-C45. I am running kernel 3.9, I just have no sound. I tried downloading and installing https://code.launchpad.net/~ubuntu-audio-dev/+archive/alsa-daily/+files/oem-audio-hda-daily-dkms_0.201304261252~raring1_all.deb , but without any good result. Please help, I need my audio back. In the end, this is my lspci command output. ale@beast:~$ lspci 00:00.0 Host bridge: Advanced Micro Devices [AMD] nee ATI RX780/RX790 Host Bridge 00:02.0 PCI bridge: Advanced Micro Devices [AMD] nee ATI RD790 PCI to PCI bridge (external gfx0 port A) 00:06.0 PCI bridge: Advanced Micro Devices [AMD] nee ATI RD790 PCI to PCI bridge (PCI express gpp port C) 00:11.0 SATA controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 SATA Controller [IDE mode] 00:12.0 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB OHCI0 Controller 00:12.1 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0 USB OHCI1 Controller 00:12.2 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB EHCI Controller 00:13.0 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB OHCI0 Controller 00:13.1 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0 USB OHCI1 Controller 00:13.2 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB EHCI Controller 00:14.0 SMBus: Advanced Micro Devices [AMD] nee ATI SBx00 SMBus Controller (rev 3c) 00:14.1 IDE interface: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 IDE Controller 00:14.2 Audio device: Advanced Micro Devices [AMD] nee ATI SBx00 Azalia (Intel HDA) 00:14.3 ISA bridge: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 LPC host controller 00:14.4 PCI bridge: Advanced Micro Devices [AMD] nee ATI SBx00 PCI to PCI Bridge 00:14.5 USB controller: Advanced Micro Devices [AMD] nee ATI SB7x0/SB8x0/SB9x0 USB OHCI2 Controller 00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor HyperTransport Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Miscellaneous Control 00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor Link Control 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV730 XT [Radeon HD 4670] 01:00.1 Audio device: Advanced Micro Devices [AMD] nee ATI RV710/730 HDMI Audio [Radeon HD 4000 series] 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168 PCI Express Gigabit Ethernet controller (rev 03) ale@beast:~$

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• What to do if I am working on a language that I don't like

  - by Sayem Ahmed

  Hi there, I really don't know if this is the right place to ask this question, but if it isn't, then I guess someone will notify. Anyway, I am working in a software development farm which is currently using PowerBuilder to develop a mid-size ERP solution. The work environment and company management are so great that it may be the best in the whole Bangladesh. Only problem is the technology that are currently being used, which is this PowerBuilder. Now I am a guy who tends to prefer modern development technologies, like DI containers, ORM, TDD, JQuery etc. PowerBuilder is a great tool too, but I couldn' like the application techniques used to build PB applications. These techniques are so inheritance-dependent that many a times these create a great deal of sufferings. I remember two days ago I had to change some processing logic in a core user object and as a result I had to test and re-test all the forms that the application have(apparently, there are almost 20 forms there, each of them with 3-4 kinds of functionalities). Also, learning PB is tough, because online material on this thing is very, very low. I can't afford to read all the documentation that PB provide because I have hard deadlines on the work that I have to do. Another thing with PB is that applications tend to rely on business logic that are implemented on databases which causes debugging to be a nightmare. As a result, I don't feel motivated enough to work in this IDE/System/Framework (or whatever) anymore. My productivity has greatly decreased, and I am not delivering quality code. I think I have the following options available to me - Remain in the current job, keep delivering worse code and let my productivity decrease day by day, taking salaries and bonuses but not delivering quality codes/doing my job the way I should, Search for a new job. At this point number 2 seems a good option, but there are also some issues. As I mentioned before, our management may be the best in the country. Our company owner is himself a software developer with 24 years of experience in software development. He is currently our Team Leader and System Analyst. He is by far the greatest manager and boss I have ever seen. He understands developer's mentality very well(as he IS himself a developer). He is also a great, kind and generous guy. Our company is only a start-up company with 10 developers. Among them, only 3-4 people knows about the business logic behind the ERP, and I am one of them. If I switch my current job, it may hamper the development of this product which I really don't want. I couldn't decide what to do in this situation, so I turned to the community for advice.

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• Creating a Training Lab on Windows Azure

  - by Michael Stephenson

  Originally posted on: http://geekswithblogs.net/michaelstephenson/archive/2013/06/17/153149.aspxThis week we are preparing for a training course that Alan Smith will be running for the support teams at one of my customers around Windows Azure. In order to facilitate the training lab we have a few prerequisites we need to handle. One of the biggest ones is that although the support team all have MSDN accounts the local desktops they work on are not ideal for running most of the labs as we want to give them some additional developer background training around Azure. Some recent Azure announcements really help us in this area: MSDN software can now be used on Azure VM You don't pay for Azure VM's when they are no longer used  Since the support team only have limited experience of Windows Azure and the organisation also have an Enterprise Agreement we decided it would be best value for money to spin up a training lab in a subscription on the EA and then we can turn the machines off when we are done. At the same time we would be able to spin them back up when the users need to do some additional lab work once the training course is completed. In order to achieve this I wanted to create a powershell script which would setup my training lab. The aim was to create 18 VM's which would be based on a prebuilt template with Visual Studio and the Azure development tools. The script I used is described below The Start & Variables The below text will setup the powershell environment and some variables which I will use elsewhere in the script. It will also import the Azure Powershell cmdlets. You can see below that I will need to download my publisher settings file and know some details from my Azure account. At this point I will assume you have a basic understanding of Azure & Powershell so already know how to do this. Set-ExecutionPolicy Unrestrictedcls $startTime = get-dateImport-Module "C:\Program Files (x86)\Microsoft SDKs\Windows Azure\PowerShell\Azure\Azure.psd1"# Azure Publisher Settings $azurePublisherSettings = '<Your settings file>.publishsettings'  # Subscription Details $subscriptionName = "<Your subscription name>" $defaultStorageAccount = "<Your default storage account>"  # Affinity Group Details $affinityGroup = '<Your affinity group>' $dataCenter = 'West Europe' # From Get-AzureLocation  # VM Details $baseVMName = 'TRN' $adminUserName = '<Your admin username>' $password = '<Your admin password>' $size = 'Medium' $vmTemplate = '<The name of your VM template image>' $rdpFilePath = '<File path to save RDP files to>' $machineSettingsPath = '<File path to save machine info to>'    Functions In the next section of the script I have some functions which are used to perform certain actions. The first is called CreateVM. This will do the following actions: If the VM already exists it will be deleted Create the cloud service Create the VM from the template I have created Add an endpoint so we can RDP to them all over the same port Download the RDP file so there is a short cut the trainees can easily access the machine via Write settings for the machine to a log file  function CreateVM($machineNo) { # Specify a name for the new VM $machineName = "$baseVMName-$machineNo" Write-Host "Creating VM: $machineName"       # Get the Azure VM Image      $myImage = Get-AzureVMImage $vmTemplate   #If the VM already exists delete and re-create it $existingVm = Get-AzureVM -Name $machineName -ServiceName $serviceName if($existingVm -ne $null) { Write-Host "VM already exists so deleting it" Remove-AzureVM -Name $machineName -ServiceName $serviceName }   "Creating Service" $serviceName = "bupa-azure-train-$machineName" Remove-AzureService -Force -ServiceName $serviceName New-AzureService -Location $dataCenter -ServiceName $serviceName   Write-Host "Creating VM: $machineName" New-AzureQuickVM -Windows -name $machineName -ServiceName $serviceName -ImageName $myImage.ImageName -InstanceSize $size -AdminUsername $adminUserName -Password $password  Write-Host "Updating the RDP endpoint for $machineName" Get-AzureVM -name $machineName -ServiceName $serviceName ` | Add-AzureEndpoint -Name RDP -Protocol TCP -LocalPort 3389 -PublicPort 550 ` | Update-AzureVM    Write-Host "Get the RDP File for machine $machineName" $machineRDPFilePath = "$rdpFilePath\$machineName.rdp" Get-AzureRemoteDesktopFile -name $machineName -ServiceName $serviceName -LocalPath "$machineRDPFilePath"   WriteMachineSettings "$machineName" "$serviceName" }    The delete machine settings function is used to delete the log file before we start re-running the process.  function DeleteMachineSettings() { Write-Host "Deleting the machine settings output file" [System.IO.File]::Delete("$machineSettingsPath"); }    The write machine settings function will get the VM and then record its details to the log file. The importance of the log file is that I can easily provide the information for all of the VM's to our infrastructure team to be able to configure access to all of the VM's    function WriteMachineSettings([string]$vmName, [string]$vmServiceName) { Write-Host "Writing to the machine settings output file"   $vm = Get-AzureVM -name $vmName -ServiceName $vmServiceName $vmEndpoint = Get-AzureEndpoint -VM $vm -Name RDP   $sb = new-object System.Text.StringBuilder $sb.Append("Service Name: "); $sb.Append($vm.ServiceName); $sb.Append(", "); $sb.Append("VM: "); $sb.Append($vm.Name); $sb.Append(", "); $sb.Append("RDP Public Port: "); $sb.Append($vmEndpoint.Port); $sb.Append(", "); $sb.Append("Public DNS: "); $sb.Append($vmEndpoint.Vip); $sb.AppendLine(""); [System.IO.File]::AppendAllText($machineSettingsPath, $sb.ToString());  } # end functions    Rest of Script In the rest of the script it is really just the bit that orchestrates the actions we want to happen. It will load the publisher settings, select the Azure subscription and then loop around the CreateVM function and create 16 VM's  Import-AzurePublishSettingsFile $azurePublisherSettings Set-AzureSubscription -SubscriptionName $subscriptionName -CurrentStorageAccount $defaultStorageAccount Select-AzureSubscription -SubscriptionName $subscriptionName  DeleteMachineSettings    "Starting creating Bupa International Azure Training Lab" $numberOfVMs = 16  for ($index=1; $index -le $numberOfVMs; $index++) { $vmNo = "$index" CreateVM($vmNo); }    "Finished creating Bupa International Azure Training Lab" # Give it a Minute Start-Sleep -s 60  $endTime = get-date "Script run time " + ($endTime - $startTime)    Conclusion As you can see there is nothing too fancy about this script but in our case of creating a small isolated training lab which is not connected to our corporate network then we can easily use this to provision the lab. Im sure if this is of use to anyone you can easily modify it to do other things with the lab environment too. A couple of points to note are that there are some soft limits in Azure about the number of cores and services your subscription can use. You may need to contact the Azure support team to be able to increase this limit. In terms of the real business value of this approach, it was not possible to use the existing desktops to do the training on, and getting some internal virtual machines would have been relatively expensive and time consuming for our ops team to do. With the Azure option we are able to spin these machines up for a temporary period during the training course and then throw them away when we are done. We expect the costing of this test lab to be very small, especially considering we have EA pricing. As a ball park I think my 18 lab VM training environment will cost in the region of $80 per day on our EA. This is a fraction of the cost of the creation of a single VM on premise.

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• What are the best practices to use NHiberante sessions in asp.net (mvc/web api) ?

  - by mrt181

  I have the following setup in my project: public class WebApiApplication : System.Web.HttpApplication { public static ISessionFactory SessionFactory { get; private set; } public WebApiApplication() { this.BeginRequest += delegate { var session = SessionFactory.OpenSession(); CurrentSessionContext.Bind(session); }; this.EndRequest += delegate { var session = SessionFactory.GetCurrentSession(); if (session == null) { return; } session = CurrentSessionContext.Unbind(SessionFactory); session.Dispose(); }; } protected void Application_Start() { AreaRegistration.RegisterAllAreas(); FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters); RouteConfig.RegisterRoutes(RouteTable.Routes); BundleConfig.RegisterBundles(BundleTable.Bundles); var assembly = Assembly.GetCallingAssembly(); SessionFactory = new NHibernateHelper(assembly, Server.MapPath("/")).SessionFactory; } } public class PositionsController : ApiController { private readonly ISession session; public PositionsController() { this.session = WebApiApplication.SessionFactory.GetCurrentSession(); } public IEnumerable<Position> Get() { var result = this.session.Query<Position>().Cacheable().ToList(); if (!result.Any()) { throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.NotFound)); } return result; } public HttpResponseMessage Post(PositionDataTransfer dto) { //TODO: Map dto to model IEnumerable<Position> positions = null; using (var transaction = this.session.BeginTransaction()) { this.session.SaveOrUpdate(positions); try { transaction.Commit(); } catch (StaleObjectStateException) { if (transaction != null && transaction.IsActive) { transaction.Rollback(); } } } var response = this.Request.CreateResponse(HttpStatusCode.Created, dto); response.Headers.Location = new Uri(this.Request.RequestUri.AbsoluteUri + "/" + dto.Name); return response; } public void Put(int id, string value) { //TODO: Implement PUT throw new NotImplementedException(); } public void Delete(int id) { //TODO: Implement DELETE throw new NotImplementedException(); } } I am not sure if this is the recommended way to insert the session into the controller. I was thinking about using DI but i am not sure how to inject the session that is opened and binded in the BeginRequest delegate into the Controllers constructor to get this public PositionsController(ISession session) { this.session = session; } Question: What is the recommended way to use NHiberante sessions in asp.net mvc/web api ?

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• Java EE 6?????????????? &quot;?&quot;????? ?????????????|WebLogic Channel|??????

  - by ???02

  ?Oracle WebLogic Server 12c??????????????????????Java EE?????Java EE 6??????????????????????????????Java EE 6?????????WebLogic Server 12c??????????Java????????????????????? 1?25????????Oracle WebLogic Server 12c Forum - ????????Java??????????? -?????WebLogic Server 12c??????? Java EE 6?? ~Java EE 6???????????????????~????????·???????????????????????????Java?????????????Java EE 6?WebLogic Server??????????????2??????????(???)??1????????Java EE????????????·?????????2????　???·??????????????·???Java?????????????????Java EE 5?????????????UFJ???????????????IT??????? ????????????????????????WebLogic Server???????????????????????????????????·??????????????????????????IT???????????·?????Publickey??????????????3????????????????????????????　??WebLogic Server?Java EE??????????????????????????????2??????2011?9???????????????Java EE?????????????????????????Java EE?????????????????????????????????Java EE??????????????????????????????????????????Java EE??????????????·????????????????????????????????????????????????¦?????WebLogic & Java EE???????????????　?????????Java EE?????????????　?????????·?????????????????2011?10???????????????????JavaOne 2011?????????????Publickey???????Java EE???????·????????????????????????????????????????????????Java EE?????????????????????????　JavaOne 2011???????????(??????)?????Java???????????????????????Java??????????????????????????????????Java EE 6????????? ????????　??????·?????????????????????????????????Java EE 6????????????WebLogic Server 12c??????Java EE?????Java EE 6??????????????????Java????????????????????????????????Java??????????????????????????　??????????????????Java EE 6??Java EE?????????????????????????　?J2EE 1.4???Java EE???????????????????????????????????????Java EE 5?????????Java EE 6???????????????????????????????????????????????????Struts?Spring????????????????????????????????????????????????????(???)　????????????????????????????JavaServer Faces(JSF)??????????????????????????????????????????????Java EE 6?????JSF 2.0?????????????????????????????????·?????????????????JSR-299:Context and Dependency Injection for Java EE Platform(CDI)????????????????????·??????????????????Java EE 6?????????1???????????????????????????　????????Java EE 6??????????4????????????????????????????????????????????????????????????????????????????????(IDE)?????????????????　1?????????????????????????????????????????????Java EE 7??8????????????Java EE 6????????????????????????????????????????????????　?????????????????????????????????????????????????????????Java EE?????????????????????????(???)??????????????　3??????????????????????????????????????????JAX-RS???WS-I Basic Profile????JAX-WS??????????????????　???4???IDE???????????NetBeans???????????????????Java EE 6?NetBeans?GlassFish??????????????????????Eclipse????IDE??????????????????????????????　????????????Java EE 6???????????????·??????????????????????????????????????????????????????????????????????　?Java EE 5???????????·?????3??(???)????????????????????????????????????????3????????????????????????????????Java EE 6???????????????????????CDI?????API???????????????????????Ruby on Rails?????????????????????????????????????????????????????????????(???)　???J2EE 1.4?????????????Java EE 6?????????????????????????????????????????????????Java EE 6????????????????????????????????????????????????????·????????WAR??????????????????????Java EE 6????????????????????????????????????J2EE 1.4??????10??1????????????????????????????Java EE???Java EE 6???????????????????　??????????????·???????????Java EE??????????J2EE 1.4?????????????????????"????Java EE??"???????????????Java EE 6???????????????????????????????　?????J2EE 1.4???????Java EE 6???????????????????????????????????????????Java EE?????????????????????????????????????????????????　??????????UFJ???????????????????????????Java EE 5????????????????????????????????????????????????????????????????????????　??Java EE 5????????J2EE 1.4??????????????POJO???????????????????????????????????????????????????????Java EE 5???????????????????????????????????????????????????????????　???J2EE 1.4????????????????Java EE 6????????????????????Dependency Injection(DI)?Aspect Oriented Programming(AOP)??????????????????????????(???)¦??????UFJ??????????????????????·?????WebLogic Server????????――????? ?????? ????? 2011?????　?????????????????????????????????????????????????????Java EE 6??????????????????????????(????????·???????????????????)???????????Java EE 6???????????　?????J2EE 1.4??Java EE 6????????????????????????????????J2EE 1.4+???????????????????????????????????????????????????????????????　????Spring????????????????????????????????????????"???"??????Java EE 6??????????????????????????????????????????　?Spring???????????????????????????????????????????????Java EE 6???????????????????EJB 3????????????????????????????EJB 3????????Java EE 6??????????????????????EJB?????????????????????????EJB????????????????(???)　????????JSF 2.0?Facelet???????????????????????????????????????????????????Struts?????????????JSF 2.0+Facelet???????????? "???????????"??"????????"?????????????????????????????????????????　?????????????????????????????????Java EE?????????Java EE 6????????????????????Java EE??????????????"??"?"???????"????????????????????????????????????????Java EE 6???????"?????????"????????????????????????????????????????????Java EE 6??????1???????Java EE?????????????????????????????　???????Java EE??????.NET??????????????????????Web????/????????·???????????????????????????????.NET????????????????????????????????Spring?Ruby on Rails???????????????Java EE 6??????????????????????????????????!???????????????????　????????????????????????Java EE?????????????????????????? Java EE????????????? WebLogic Server??????――??????·???????????????????????????????????????3?(?????)???

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• javaws not found

  - by Hunt

  I have a server which has centos installed in it. Recently I have installed jdk 1.6 into it. When I try to run java command from shell it's working perfectly fine. Java is stored into /usr/java/jdk1.6.0_25 and path is set to /usr/bin/ when I type which java. When I tried running javaws (which comes with the jdk 1.6 only) it is showing me following error: Java Web Start splash screen process exiting ... Bad installation: JAVAWS_HOME not set: No such file or directory Executing env command prints following details: HOSTNAME=XX-XXX-XXX-XX TERM=xterm SHELL=/bin/bash HISTSIZE=1000 OLDPWD=/usr/java SSH_TTY=/dev/pts/1 USER=root LS_COLORS=no=00:fi=00:di=00;34:ln=00;36:pi=40;33:so=00;35:bd=40;33;01:cd=40;33;01:or=01;05;37;41:mi=01;05;37;41:ex=00;32:*.cmd=00;32:*.exe=00;32:*.com=00;32:*.btm=00;32:*.bat=00;32:*.sh=00;32:*.csh=00;32:*.tar=00;31:*.tgz=00;31:*.arj=00;31:*.taz=00;31:*.lzh=00;31:*.zip=00;31:*.z=00;31:*.Z=00;31:*.gz=00;31:*.bz2=00;31:*.bz=00;31:*.tz=00;31:*.rpm=00;31:*.cpio=00;31:*.jpg=00;35:*.gif=00;35:*.bmp=00;35:*.xbm=00;35:*.xpm=00;35:*.png=00;35:*.tif=00;35: JAVA_PATH=/usr/java/jre1.6.0_24/jre/bin MAIL=/var/spool/mail/root PATH=/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/usr/java/jre1.6.0_24/jre/bin INPUTRC=/etc/inputrc PWD=/usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin JAVA_HOME=/usr/java/jre1.6.0_24/jre/bin LANG=en_US.UTF-8 SSH_ASKPASS=/usr/libexec/openssh/gnome-ssh-askpass SHLVL=1 HOME=/root LOGNAME=root JAVAWS_HOME=/usr/java/jre1.6.0_24/bin SSH_CONNECTION=175.100.170.26 3387 64.150.190.94 22 LESSOPEN=|/usr/bin/lesspipe.sh %s G_BROKEN_FILENAMES=1 _=/bin/env

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• emacs, colors in term-mode

  - by valya

  Hello, I use Emacs and I run bash with M-x term command. There is a problem: colors in the *terminal* buffer aren't the same as in Gnome Terminal, and they are worse (do you need a screen shot?). How can I fix this? This is pretty annoying :-) Thank you! Linux Mint 9 Emacs 23.1.1 x86_64 __________________ /home/valentin/Work/buzzoola/buzzoola/test/vagrant [.../vagrant]$ echo $TERM eterm-color __________________ /home/valentin/Work/buzzoola/buzzoola/test/vagrant [.../vagrant]$ echo $LS_COLORS rs=0:di=01;34:ln=01;36:hl=44;37:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31 ;01:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31: *.arj=01;31:*.taz=01;31:*.lzh=01;31:*.lzma=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31 :*.gz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01 ;31:*.rar=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.jpg=01;35:*.jp eg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;3 5:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.p cx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.ogm=01;35:*.mp4=01; 35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm =01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:* .xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.axv=01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00 ;36:*.au=00;36:*.flac=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*. ogg=00;36:*.ra=00;36:*.wav=00;36:*.axa=00;36:*.oga=00;36:*.spx=00;36:*.xspf=00;36:

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• Why does my Belkin wireless router has eMule port open?

  - by Jeremy Powell

  I have a Belkin F6D4230-4 v1 router. When I port scan it with nmap I get the following: $ sudo nmap -sS -A -T5 192.168.2.1 -p- Starting Nmap 5.00 ( http://nmap.org ) at 2010-04-17 11:40 CDT Interesting ports on 192.168.2.1: Not shown: 65532 closed ports PORT STATE SERVICE VERSION 80/tcp open http Belkin 2307 wifi router http config (IP_SHARER httpd 1.0) |_ html-title: '+i1+' 4661/tcp filtered unknown 4662/tcp filtered edonkey MAC Address: 00:22:75:5D:52:D8 (Belkin International) Device type: WAP|broadband router|firewall|printer|specialized|webcam Running (JUST GUESSING) : Linksys embedded (95%), TRENDnet embedded (95%), Netgear embedded (92%), Canon embedded (89%), On Time RTOS (89%), Symantec embedded (89%), D-Link embedded (86%), Polycom embedded (85%) Aggressive OS guesses: Linksys WRT54GC or TRENDnet TEW-431BRP wireless broadband router (95%), TRENDnet TW100-BRF114 broadband router (95%), Netgear FR114P ProSafe VPN firewall (92%), Canon PIXMA MX850 printer (89%), On Time RTOS (89%), Symantec Firewall/VPN 100 (89%), D-Link DI-714P+ wireless broadband router (86%), Polycom ViewStation video conferencing system (85%) No exact OS matches for host (test conditions non-ideal). Network Distance: 1 hop Service Info: Device: WAP OS and Service detection performed. Please report any incorrect results at http://nmap.org/submit/ . Nmap done: 1 IP address (1 host up) scanned in 21.57 seconds Why are the 4461 and 4462 ports open? This is a basic, out-of-the-box installation.

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• Looking for cheap Wireless router, with USB for attached USB disk drive

  - by geoffc

  I have a 802.11b router at home (DLink DI-614+ (B rev)) and it is working perfectly well for me. I want to replace it though, since it is out of updates, and now several years old and heck, I want a new toy to configure! I was trying to decide what to get. I could care less about 802.11g or n support, since B is fast enough, but every device in my house is now B/G, so G would be fine for me. N buys me little to nothing. (Small enough house that range is a non-issue). The features I realized I want are a USB port for sharing a USB hard drive. I would like to have a central device I could store files on. I do not want to waste the power of an always running PC to do this, so a router seems like the place to go. I would love it, if it could support Vonage VOIP as well, then I could ditch a power brick from a second device (I have the small DLink Vonage VOIP box). All the current examples of this router (with USB drive, yet to find one with VOIP too!) are in the $100+ range, and N and silly, when a B/G is in the $30 range around here.

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• Advice needed for a home network setup (hardware & software) to handle many clients and potentially heavy traffic

  - by posdef

  I have recently decided to re-structure the home network of our flatshare here. Here's a quick outline of the situation. I envision to have the following 4 devices connected to the router via cable: Xbox 360 IP phone Printer QNAP server (Web, File and Multimedia) We are three people living here, so on top of that there will be to 5-6 computers/mobile devices connecting as wireless clients. My goal is to be able to transfer files (when needed) between the computer and the Multimedia server, which I can reach via 360 and play on the TV. I also would like to keep a high level of security; right now I have the encryption on WPA2 and MAC filtering. I don't believe the web server will get heavy traffic, though I would like to have it responsive. Likewise, I don't have a habit of downloading via torrent etc, but I greatly appreciate my network being responsive and fast, especially when I am browsing or streaming high quality media. Now my questions are: is this setup feasible? smart? efficient? can this be improved somehow? my current router (D-Link DI624) and the previous one (DI-524) used to have spontaneous drops in network, which I find highly irritating. I don't believe in my router, especially now that it completely crashed when I was test-running the setup by transferring a large media file to server while xbox was playing music from the server, and two computers browsing the net. Do I need to get new hardware, if so, any recommendations for a reliable and fast router?

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• Blender refuses to start

  - by Sekhemty

  I'm trying to run Blender under Linux, but I'm unable to do that, whenever I try I get some errors. I'm using Kubuntu 12.04 with KDE 4.11.1. This is my video card: ~$ lspci | grep VGA 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV610/M74 [Mobility Radeon HD 2400 XT] I used to have installed the fglrx proprietary Catalyst drivers, but lately they gave me some system-wide problems and I had to revert to the open source Mesa drivers (I don't think that these details are important, but just in case, the whole story is here). Whit the fglrx drivers Blender was running fine, but now, whenever I try to start it, I get this error message (some parts are in italian, but I think that they are easily understandable): ~$ blender connect failed: No such file or directory Writing: /tmp/blender.crash.txt Errore di segmentazione (core dump creato) The content of /tmp/blender.crash.txt is as follows: # Blender 2.68 (sub 5), Revision: 60150 # backtrace /usr/lib/blender/blender() [0x877a41f] [0xb7756400] /usr/lib/i386-linux-gnu/libLLVM-3.0.so.1(_ZN4llvm3ARM8SPRClassC1Ev+0x15) [0xa8f4a9d5] /usr/lib/i386-linux-gnu/libLLVM-3.0.so.1(+0x25ca48) [0xa8eefa48] /lib/ld-linux.so.2(+0xeeab) [0xb7765eab] /lib/ld-linux.so.2(+0xef94) [0xb7765f94] /lib/ld-linux.so.2(+0x12fa6) [0xb7769fa6] /lib/ld-linux.so.2(+0xeccf) [0xb7765ccf] /lib/ld-linux.so.2(+0x127f4) [0xb77697f4] /lib/i386-linux-gnu/libdl.so.2(+0xbe9) [0xb4ff9be9] /lib/ld-linux.so.2(+0xeccf) [0xb7765ccf] /lib/i386-linux-gnu/libdl.so.2(+0x133a) [0xb4ffa33a] /lib/i386-linux-gnu/libdl.so.2(dlopen+0x47) [0xb4ff9c97] /usr/lib/i386-linux-gnu/mesa/libGL.so.1(+0x3cbf0) [0xb7717bf0] /usr/lib/i386-linux-gnu/mesa/libGL.so.1(+0x4079d) [0xb771b79d] /usr/lib/i386-linux-gnu/mesa/libGL.so.1(+0x1a3aa) [0xb76f53aa] /usr/lib/i386-linux-gnu/mesa/libGL.so.1(glXQueryVersion+0x2e) [0xb76f0cee] /usr/lib/blender/blender(_ZN15GHOST_WindowX11C1EP15GHOST_SystemX11P9_XDisplayRK10STR_Stringiijj18GHOST_TWindowStatei25GHOST_TDrawingContextTypebbt+0x11c) [0x8f54aec] /usr/lib/blender/blender(_ZN15GHOST_SystemX1112createWindowERK10STR_Stringiijj18GHOST_TWindowState25GHOST_TDrawingContextTypebbti+0xd7) [0x8f4f4a7] /usr/lib/blender/blender(GHOST_CreateWindow+0xb6) [0x8f4cf86] /usr/lib/blender/blender(wm_window_add_ghostwindows+0x205) [0x8799be5] /usr/lib/blender/blender(WM_check+0x50) [0x877b670] /usr/lib/blender/blender(wm_homefile_read+0x111) [0x87859f1] /usr/lib/blender/blender(WM_init+0xd2) [0x8787872] /usr/lib/blender/blender(main+0xe6e) [0x873848e] /lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0xb4e694d3] /usr/lib/blender/blender() [0x8778a99] The only thing that I can guess from this report is that the mesa drivers are somewhat involved, as I already suspected, but I don't have a clue on what I need to do to try to solve the issue.

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• Why am I unable to reach local network computers, but able to browse the web?

  - by Igor Zinov'yev

  I have a weird problem. Today after turning my Ubuntu 9.10 PC on I can't connect to my local network, but I can use the Internet. We have a single Windows 2003 server machine that acts as a local main DNS server, DHCP server and a domain controller. Although it seems to give me the local IP address, I can not ping it, as well as any other machine on the net. I have tried all of the below and it didn't help: Rebooting; Reconnecting to the network; Forcing the dhclient to renew the IP address; Deleting and creating new connection profiles; Plugging my machine into another network outlet; Maybe it has something to do with routing, because I have tampered with routing tables the day before, but the tables seem ok to me: $ route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.0.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 vboxnet0 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0 Our LAN uses a D-Link DI-604 router, and it looks to me as if I am connected to the network outside the router. I can not even access its administration page. Please at least suggest what I can do to solve this. P.S. What seems strangest to me is that I can access the PC in question from outside the network by opening a port on the router. I have managed to ssh to it from outside, but I still can't ping nothing on the inside. P.P.S Today I tried reinstalling network-manager with --purge option, but it did no good. After that I created a new DCHP reservation for my PC in order to change my local IP, but that didn't change anything either. My PC is able to get a DHCP offer, but then it's unable to connect to any local computers. I am desperate.

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• [Mac OS X] Terratec Cinergy Hybrid T USB XS is not recognized anymore

  - by Gabble

  I have used Terratec Cinergy Hybrid T USB XS for years now, alongside with Elgato EyeTV software. I am a happy and completely satisfied user! Since a couple of weeks the USB sitck stopped working on my MacPro1,1 (OS version 10.6.3): EyeTV does not see any device attached, and actually, the green led on the stick stays off. 1) it is not a USB port fault: I have unplugged any other USB/Firewire device and tried with different USB ports, to no avail (any other USB devices work as expected on any port) 2) I have completely uninstalled EyeTV software, including preferences and system daemons/extensions, rebooted and reinstalled the latest EyeTV. No way. 3) reset the PRAM. Nope. 4) checked the Apple System Profiler - USB: No device attached, The MacPro does not see it at all. ============= I need to say that: a) the device worked as a charm even with the latest OS 10.6.x (so it's not a OS upgrade cause) b) I have plugged the Terratec Cinergy Hybrid T USB XS to my MacBook5,1 where EyeTV is not installed and was never installed: The green led on the stick turns on, the growl bubble pops up, and the device is perfectly recognized by the system. Apple System Profiler says (sorry, Italian language): Cinergy Hybrid T USB XS (2882): ID prodotto: 0x005e ID fornitore: 0x0ccd Versione: 1.10 Numero di serie: 061102005755 Velocità: Fino a 12 Mb/sec Produttore: TerraTec Electronic GmbH ID posizione: 0x04100000 Corrente disponibile (mA): 500 Corrente necessaria (mA): 500 At this point I am pretty sure the Terratec stick is not damaged and there is something wrong with my MacPro. I kindly ask you: Is there a way to force my MacPro recognize the USB device? What can I check? Is there something that caches USB connection that can be reset? A OS reinstall would be the very last resort for me… Thanks in advance for any help you will offer!

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• Periodic internet connection drops

  - by sterlingholt

  My setup is a dsl modem, and a dlink di 524M router. I'm also using a Witopia VPN which runs through OpenVPN. I've been having trouble with the internet connection dropping very frequently. It comes back shortly, without even a router/modem/computer restart. This happens as frequently as every ten minutes. Occasionally (not often) it will last as long as an hour or two without dropping. When it drops, I can get it back almost immediately by clicking Reconnect in the OpenVPN GUI and letting that do it's thing. It's worth noting that I'm in China. Calling support is a bit difficult because of that. Also I don't really understand all of the router's software, although I've got it generally figured out. I've tried a bunch of stuff, attempts to diagnose and/or fix the problem. No success with any of the following: I've power cycled both the modem and the router. I've tried an ethernet connection to the router. I've connected without the VPN. I've disabled IEEE authentication on all connections. I've checked for viruses. I've tried lifting it off the ground so as to prevent overheating.

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• Enrich a dataset of POIs with OpenStreetMap

  - by zero

  update: due to some hints of users - eg oliver Salzburg and slhck i have been aware of gis.stackexchange.com - so i moved the topic on my own: Plz can you or somebody who has the permission close the article - since we do not need this topic on two sites. Thx for your work. KEEP up the service here! STACK-sites rock. I have a list of POIs, some with a full description and some with only a few data entries, like the following: 6.9441000 50.9242000 [50677] (Ital) Casa di Biase [Köln] 6.9373600 50.9291800 [50674] (Ital) Al Setaccio [Köln] However, I need the full dataset. Can I get this somewhere? If I have all the position data, is it possible to find the rest? a. name of the street b. name of the town So for example, the data should finally look like this: 10.5346100 52.1613600 [38300] (Chin) Wanbao Kommissstr.9 [Wolfenbüttel] 13.2832500 52.4422600 [14167] (Ital) LaPergola Unter den Eichen 84d [Berlin] 13.3177700 52.5062900 [10625] (Chin) Good Friends Kantstr.30 [Berlin] Can I do this with OpenStreetMap? Should I parse OpenStreetMap data? Or OpenBabel?

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• How do I access my samba drive through several layers of network topology?

  - by stephenmm

  I have a new windows 7 Home Premium machine that is in a different room than my main computer area. As such I have to use a bridge and another router. Everything is working wonderfully except I cannot access the SAMBA drive with the new machine. I know that SAMBA is accessible as an older WinXP machine can access it. A picture of my network would probably be helpfull: To ISP | | +---------------------------+ | WAN | | Cable Modem | | (2WIRE678) | | | | | +---------------------------+ | +---------------------------+ | | (|) (|) +-----------+ | Belkin Router | | | | Wireless | | (F5D) |--+ +--| WinXP | | | |SAMBA USER | | | +-----------+ +---------------------------+ | | | | +------------+ | | Ubuntu | | | Apache + | | |SAMBA Server| | +------------+ | | +---------------------------+ | | | Netgear Bridge | | (XET1001) | | | +---------------------------+ # # +---------------------------+ | | | Netgear Bridge | | (XET1001) | | | +---------------------------+ | +---------------------------+ | | | D-Link Router | | (DI-524) | | | | | +---------------------------+ | | | | +-----------+ | | | Win7 | |SAMBA USER?| +-----------+ More interesting data points: 1. I can ping the SAMBA server from the Win7 machine locally (Ie. 192.168.2.2) 2. I can access the webserver from the Win7 machine locally (Ie. 192.168.2.2) 3. I followed the advice to get Win7 and SAMBA to play nice: http://www.tannerwilliamson.com/2009/09/windows-7-seven-network-file-sharing-fix-samba-smb/ Sorry for being so long winded but it is kind of complex and I am really at a loss as to how to fix it. If any of you have some suggestions I would love to hear it!

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• MacBook Pro with OSX 10.6.3 (Snow Leopard) Wi-Fi network connection breaks after few minutes

  - by Yanick Landry

  I have a MacBook Pro with OSX 10.6.3 (Snow Leopard). After connecting on a Wi-Fi network, the connection "breaks" after a few minutes. What I mean by "breaking" is that all requests, whether it is loading a web page, connecting to a share folder, connecting to my local router at 192.168.0.1, or pinging anything doesn't get through (time out). When in a "break" situation, I can see in the Network Settings panel that I still have an active IP, which I can successfully ping. I have this problem at home with a router D-Link DI-624 and at work with a D-Link WBR-2310, all with updated firmwares. I thought DHCP was the issue. So I tried assigning a fixed IP address (192.168.0.166). It successfully connects, but after a few minutes, the connection still breaks. The solution I'm currently using is that I disable the AirPort (on the Network icon menu in the top bar), wait a few seconds then re-enable it. It then quickly works, but the connection still breaks after a few minutes. I tried Googling my problem but I think I can't find any good keywords ! It's my first question here, so sorry if I don't respect some rules.

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• Terratec Cinergy Hybrid T USB XS is not recognized anymore on Mac OS X

  - by Gabble

  I have used Terratec Cinergy Hybrid T USB XS for years now, alongside with Elgato EyeTV software. I am a happy and completely satisfied user! Since a couple of weeks the USB sitck stopped working on my MacPro1,1 (OS version 10.6.3): EyeTV does not see any device attached, and actually, the green led on the stick stays off. It is not a USB port fault: I have unplugged any other USB/Firewire device and tried with different USB ports, to no avail (any other USB devices work as expected on any port) I have completely uninstalled EyeTV software, including preferences and system daemons/extensions, rebooted and reinstalled the latest EyeTV. No way. Reset the PRAM. Nope. Checked the Apple System Profiler - USB: No device attached, The MacPro does not see it at all. I need to say that: a) The device worked as a charm even with the latest OS 10.6.x (so it's not a OS upgrade cause). b) I have plugged the Terratec Cinergy Hybrid T USB XS to my MacBook5,1 where EyeTV is not installed and was never installed: The green led on the stick turns on, the growl bubble pops up, and the device is perfectly recognized by the system. Apple System Profiler says (sorry, Italian language): Cinergy Hybrid T USB XS (2882): ID prodotto: 0x005e ID fornitore: 0x0ccd Versione: 1.10 Numero di serie: 061102005755 Velocità: Fino a 12 Mb/sec Produttore: TerraTec Electronic GmbH ID posizione: 0x04100000 Corrente disponibile (mA): 500 Corrente necessaria (mA): 500 At this point I am pretty sure the Terratec stick is not damaged and there is something wrong with my MacPro. I kindly ask you: Is there a way to force my MacPro recognize the USB device? What can I check? Is there something that caches USB connection that can be reset? A OS reinstall would be the very last resort for me. Thanks in advance for any help you will offer!

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• Simple vLAN setup

  - by Logan Bissonnette

  I have a basic lab environment set up to try and get 2 vLANs working in hyper-v. I have the following equipment 1 hyper-v server 1 Desktop PC 1 Managed Switch (d-link DES-3052P) 1 cheap router (DI-604) My end goal is to have 1 VM and the desktop on one vLAN with internet, and 1 VM on a separate vLAN with internet access. I am having troubles getting an internet connection to both vLANs. The switch does not have the ability to have asynchronous vLANs. This is my switch configuration Port 1 - Trunk Port - Connected to router Port 2 - Trunk Port - Connected to hyper-v Server Port 3 - Access Port- Connected to Desktop Within hyper-v I have 1 switch and 2 VMs. When the VMs are set up to use vlan ID 1, everything works fine. As soon as a VM is set up to use vlan ID 2, they lose all network connection and cannot communicate with the router anymore. I believe this is because the router is not vLAN aware. Can anyone help me with what settings need to be set up on my switch? I believe I want an egress rule so traffic leaving towards the router is untagged, is that right? If not, any ideas or hints as to what needs to be set up?

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• Periodic internet connection drops

  - by user9647

  My setup is a dsl modem, and a dlink di 524M router. I'm also using a Witopia VPN which runs through OpenVPN. I've been having trouble with the internet connection dropping very frequently. It comes back shortly, without even a router/modem/computer restart. This happens as frequently as every ten minutes. Occasionally (not often) it will last as long as an hour or two without dropping. When it drops, I can get it back almost immediately by clicking Reconnect in the OpenVPN GUI and letting that do it's thing. It's worth noting that I'm in China. Calling support is a bit difficult because of that. Also I don't really understand all of the router's software, although I've got it generally figured out. I've tried a bunch of stuff, attempts to diagnose and/or fix the problem. No success with any of the following: I've power cycled both the modem and the router. I've tried an ethernet connection to the router. I've connected without the VPN. I've disabled IEEE authentication on all connections. I've checked for viruses. I've tried lifting it off the ground so as to prevent overheating.

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