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• Prioritizing Product Features

  - by Robert May

  A very common task in Agile Environments is prioritization.  Teams that are functioning well will prioritize new features, old features, the backlog, and any other source of stories for the team, and they’ll do it regularly. Not all teams are good at prioritizing according to the real return on investment that building stories will yield to the company.  This is unfortunate.  Too often, teams end up building features that are less valuable, and everyone seems to know it except perhaps the product owner!  Most features built into software are never even used.  Clearly, not much return for features that go unused. So how does a company avoid building features that add little value to the company?  This is a tough question to answer, but usually, this prioritization starts at the top with the executives of the company.  After all, they’re responsible for the overall vision of the company. Here’s what I recommend: Know your market. Know your customers and users. Know where you’re going and what you want to achieve. Implement the Vision Know Your Market We often see companies that don’t know their market.  Personally, I’m surprised by this.  These companies don’t know who their competitors are, don’t know what features make their product desirable in the market, and in many cases, get by with saying, “I’ve been doing this for XX years.  I know what the market wants!”  In many cases, they equate “marketing” with “advertising” and don’t understand the difference. This is almost never true.  Good companies will spend significant amounts of time and money finding out who they’re competing against and what makes their competitors successful in the marketplace.  Good companies understand that marketing involves more than just advertising.  Often, marketing is mostly research and analysis, not sales.  Until you understand your market, you cannot know what features will give you the best return on your investment dollar. Good companies have a marketing department and can answer the next important step which is to know your customers and your users. Know your Customers and Users First, note that I included both customers and users.  They’re often not the same thing.  Users use the product that you build.  Customers buy the product that you build.  It’s a subtle difference, but too often, I’ve seen companies that focus exclusively on one or the other and are not successful simply because they ignore an important part of the group. If your company is doing appropriate marketing, you know that these are two different aspects of your product and that both deserve attention to have a product that is successful in your target market.  Your marketing department should be spending a lot of time understanding these personas and then conveying that information to the company. I’m always surprised when development teams think that they can build a product that people want to use without understanding the users of that product.  Developers think differently than most people in the world.  They know what the computer is doing.  The computer isn’t magic to them.  So when they assume that they know how to build something, they bring with them quite a bit of baggage.  Never assume that you know your customer unless you’re regularly having interaction with them.  Also, don’t just leave this to Marketing or Product Management.  Take them time to get your developers out with the customers as well.  Developers are very smart people, and often, seeing how someone uses their software inspires them to make a much better product. Very often, because the users and customers aren’t know, teams will spend a significant amount of time building apps that are super flexible and configurable so that any possible combination of feature can be used.  This demonstrates a clear lack of understanding of the customer.  Most configuration questions can quickly be answered by talking to the customer.  In most cases, if your software requires significant setup and configuration before its usable, you probably don’t know your customers and users very well. Until you know your customers, you cannot know what features will be most valuable to your customers and you cannot build those features in a way that your customers can use. Know Where You’re Going and What You Want to Achieve Many companies suffer from not having a plan.  Executives will tell the team to make them a plan.  The team, not knowing their market and customers and users, will come up with a plan that doesn’t reflect reality and doesn’t consider ROI.  Management then wonders why the product is doing poorly in the market place. Instead of leaving this up to the teams, as executives, work with Marketing to understand what broad categories of features will sell the most product in the marketplace.  Then, once you’ve determined that, give this vision to the team and let them run with it.  Revise the vision as needed, but avoid changing streams frequently.  Sure, sometimes you need to, but often, executives will change priorities many times a month, leading to nothing more than confusion.  If the team has a vision, they’ll be able to execute that vision far better than they could otherwise. By knowing what products are most important, you can set budgetary goals and guidelines that will help you achieve the vision that was created. Implement the Vision Creating the vision is often where the general executives stop participating in the plan.  The team is responsible for implementing that vision.  Executives should attend showcases and and should remain aware of the progress that the team is making towards meeting the vision, however. Once a broad vision has been created, the team should break that vision down into minimal market features (MMF).  These MMFs should be sized using story points so that, using the team’s velocity, an estimated cost can be determined for each feature.  The product management team should then try to quantify the relative value of the MMFs based on customer feedback and interviews.  Once the value and cost of creating the feature is understood, a return on investment can be calculated.  The features should then be prioritized with the MMF’s that have the highest value and lowest cost rising to the top of features to implement.  Don’t let politics get in the way! Once the MMF’s have been prioritized, they should go through release planning to schedule them for implementation. Conclusion By having a good grasp on the strategy of the company, your Agile teams can be much more effective.  Each and every story the team is implementing will roll up into features that matter to the company and provide ROI to them.  The steps outlined in this post should be repeated on a regular basis.  I recommend reviewing them at least once per quarter to make sure that the vision hasn’t shifted and that the teams are still working on what matters most to the company. Technorati Tags: Agile,Product Owner,ROI

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• Torque jobs does not enter "E" state (unless "qrun")

  - by Vi.

  Jobs I add to the queue stays there in "Queued" state without attempts to be executed (unless I manually qrun them) /var/spool/torque/server_logs say just 04/11/2011 12:43:27;0100;PBS_Server;Job;16.localhost;enqueuing into batch, state 1 hop 1 04/11/2011 12:43:27;0008;PBS_Server;Job;16.localhost;Job Queued at request of test@localhost, owner = test@localhost, job name = Qqq, queue = batch The job requires just 1 CPU on 1 node. # qmgr -c "list queue batch" Queue batch queue_type = Execution total_jobs = 0 state_count = Transit:0 Queued:0 Held:0 Waiting:0 Running:0 Exiting:0 max_running = 3 acl_host_enable = True acl_hosts = localhost resources_min.ncpus = 1 resources_min.nodect = 1 resources_default.ncpus = 1 resources_default.nodes = 1 resources_default.walltime = 00:00:10 mtime = Mon Apr 11 12:07:10 2011 resources_assigned.ncpus = 0 resources_assigned.nodect = 0 kill_delay = 3 enabled = True started = True I can't set resources_assigned to nonzero because of Cannot set attribute, read only or insufficient permission resources_assigned.ncpus. When I qrun some task, this goes to mom's log: 04/11/2011 21:27:48;0001; pbs_mom;Svr;pbs_mom;LOG_DEBUG::mom_checkpoint_job_has_checkpoint, FALSE 04/11/2011 21:27:48;0001; pbs_mom;Job;TMomFinalizeJob3;job 18.localhost started, pid = 28592 04/11/2011 21:27:48;0080; pbs_mom;Job;18.localhost;scan_for_terminated: job 18.localhost task 1 terminated, sid=28592 04/11/2011 21:27:48;0008; pbs_mom;Job;18.localhost;job was terminated 04/11/2011 21:27:48;0080; pbs_mom;Svr;preobit_reply;top of preobit_reply 04/11/2011 21:27:48;0080; pbs_mom;Svr;preobit_reply;DIS_reply_read/decode_DIS_replySvr worked, top of while loop 04/11/2011 21:27:48;0080; pbs_mom;Svr;preobit_reply;in while loop, no error from job stat 04/11/2011 21:27:48;0080; pbs_mom;Job;18.localhost;obit sent to server Scheduler log (/var/spool/torque/sched_logs/20110705): 07/05/2011 21:44:53;0002; pbs_sched;Svr;Log;Log opened 07/05/2011 21:44:53;0002; pbs_sched;Svr;TokenAct;Account file /var/spool/torque/sched_priv/accounting/20110705 opened 07/05/2011 21:44:53;0002; pbs_sched;Svr;main;/usr/sbin/pbs_sched startup pid 16234 qstat -f: Job Id: 26.localhost Job_Name = qwe Job_Owner = test@localhost job_state = Q queue = batch server = localhost Checkpoint = u ctime = Tue Jul 5 21:43:31 2011 Error_Path = localhost:/home/test/jscfi/default/0.738784810485275/qwe.e26 Hold_Types = n Join_Path = n Keep_Files = n Mail_Points = a mtime = Tue Jul 5 21:43:31 2011 Output_Path = localhost:/home/test/jscfi/default/0.738784810485275/qwe.o26 Priority = 0 qtime = Tue Jul 5 21:43:31 2011 Rerunable = True Resource_List.ncpus = 1 Resource_List.neednodes = 1:ppn=1 Resource_List.nodect = 1 Resource_List.nodes = 1:ppn=1 Resource_List.walltime = 00:01:00 substate = 10 Variable_List = PBS_O_HOME=/home/test,PBS_O_LANG=en_US.UTF-8, PBS_O_LOGNAME=test, PBS_O_PATH=/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/usr/games, PBS_O_MAIL=/var/mail/test,PBS_O_SHELL=/bin/sh,PBS_SERVER=127.0.0.1, PBS_O_WORKDIR=/home/test/jscfi/default/0.738784810485275, PBS_O_QUEUE=batch,PBS_O_HOST=localhost euser = test egroup = test queue_rank = 1 queue_type = E etime = Tue Jul 5 21:43:31 2011 submit_args = run.pbs Walltime.Remaining = 6 fault_tolerant = False How to make it execute jobs automatically, without manual qrun?

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• Writing Unit Tests for ASP.NET Web API Controller

  - by shiju

  In this blog post, I will write unit tests for a ASP.NET Web API controller in the EFMVC reference application. Let me introduce the EFMVC app, If you haven't heard about EFMVC. EFMVC is a simple app, developed as a reference implementation for demonstrating ASP.NET MVC, EF Code First, ASP.NET Web API, Domain-Driven Design (DDD), Test-Driven Development (DDD). The current version is built with ASP.NET MVC 4, EF Code First 5, ASP.NET Web API, Autofac, AutoMapper, Nunit and Moq. All unit tests were written with Nunit and Moq. You can download the latest version of the reference app from http://efmvc.codeplex.com/ Unit Test for HTTP Get Let’s write a unit test class for verifying the behaviour of a ASP.NET Web API controller named CategoryController. Let’s define mock implementation for Repository class, and a Command Bus that is used for executing write operations.  [TestFixture] public class CategoryApiControllerTest { private Mock<ICategoryRepository> categoryRepository; private Mock<ICommandBus> commandBus; [SetUp] public void SetUp() {     categoryRepository = new Mock<ICategoryRepository>();     commandBus = new Mock<ICommandBus>(); } The code block below provides the unit test for a HTTP Get operation. [Test] public void Get_All_Returns_AllCategory() {     // Arrange        IEnumerable<CategoryWithExpense> fakeCategories = GetCategories();     categoryRepository.Setup(x => x.GetCategoryWithExpenses()).Returns(fakeCategories);     CategoryController controller = new CategoryController(commandBus.Object, categoryRepository.Object)     {         Request = new HttpRequestMessage()                 {                     Properties = { { HttpPropertyKeys.HttpConfigurationKey, new HttpConfiguration() } }                 }     };     // Act     var categories = controller.Get();     // Assert     Assert.IsNotNull(categories, "Result is null");     Assert.IsInstanceOf(typeof(IEnumerable<CategoryWithExpense>),categories, "Wrong Model");             Assert.AreEqual(3, categories.Count(), "Got wrong number of Categories"); }        The GetCategories method is provided below: private static IEnumerable<CategoryWithExpense> GetCategories() {     IEnumerable<CategoryWithExpense> fakeCategories = new List<CategoryWithExpense> {     new CategoryWithExpense {CategoryId=1, CategoryName = "Test1", Description="Test1Desc", TotalExpenses=1000},     new CategoryWithExpense {CategoryId=2, CategoryName = "Test2", Description="Test2Desc",TotalExpenses=2000},     new CategoryWithExpense { CategoryId=3, CategoryName = "Test3", Description="Test3Desc",TotalExpenses=3000}       }.AsEnumerable();     return fakeCategories; } In the unit test method Get_All_Returns_AllCategory, we specify setup on the mocked type ICategoryrepository, for a call to GetCategoryWithExpenses method returns dummy data. We create an instance of the ApiController, where we have specified the Request property of the ApiController since the Request property is used to create a new HttpResponseMessage that will provide the appropriate HTTP status code along with response content data. Unit Tests are using for specifying the behaviour of components so that we have specified that Get operation will use the model type IEnumerable<CategoryWithExpense> for sending the Content data. The implementation of HTTP Get in the CategoryController is provided below: public IQueryable<CategoryWithExpense> Get() {     var categories = categoryRepository.GetCategoryWithExpenses().AsQueryable();     return categories; } Unit Test for HTTP Post The following are the behaviours we are going to implement for the HTTP Post: A successful HTTP Post  operation should return HTTP status code Created An empty Category should return HTTP status code BadRequest A successful HTTP Post operation should provide correct Location header information in the response for the newly created resource. Writing unit test for HTTP Post is required more information than we write for HTTP Get. In the HTTP Post implementation, we will call to Url.Link for specifying the header Location of Response as shown in below code block. var response = Request.CreateResponse(HttpStatusCode.Created, category); string uri = Url.Link("DefaultApi", new { id = category.CategoryId }); response.Headers.Location = new Uri(uri); return response; While we are executing Url.Link from unit tests, we have to specify HttpRouteData information from the unit test method. Otherwise, Url.Link will get a null value. The code block below shows the unit tests for specifying the behaviours for the HTTP Post operation. [Test] public void Post_Category_Returns_CreatedStatusCode() {     // Arrange        commandBus.Setup(c => c.Submit(It.IsAny<CreateOrUpdateCategoryCommand>())).Returns(new CommandResult(true));     Mapper.CreateMap<CategoryFormModel, CreateOrUpdateCategoryCommand>();          var httpConfiguration = new HttpConfiguration();     WebApiConfig.Register(httpConfiguration);     var httpRouteData = new HttpRouteData(httpConfiguration.Routes["DefaultApi"],         new HttpRouteValueDictionary { { "controller", "category" } });     var controller = new CategoryController(commandBus.Object, categoryRepository.Object)     {         Request = new HttpRequestMessage(HttpMethod.Post, "http://localhost/api/category/")         {             Properties =             {                 { HttpPropertyKeys.HttpConfigurationKey, httpConfiguration },                 { HttpPropertyKeys.HttpRouteDataKey, httpRouteData }             }         }     };     // Act     CategoryModel category = new CategoryModel();     category.CategoryId = 1;     category.CategoryName = "Mock Category";     var response = controller.Post(category);               // Assert     Assert.AreEqual(HttpStatusCode.Created, response.StatusCode);     var newCategory = JsonConvert.DeserializeObject<CategoryModel>(response.Content.ReadAsStringAsync().Result);     Assert.AreEqual(string.Format("http://localhost/api/category/{0}", newCategory.CategoryId), response.Headers.Location.ToString()); } [Test] public void Post_EmptyCategory_Returns_BadRequestStatusCode() {     // Arrange        commandBus.Setup(c => c.Submit(It.IsAny<CreateOrUpdateCategoryCommand>())).Returns(new CommandResult(true));     Mapper.CreateMap<CategoryFormModel, CreateOrUpdateCategoryCommand>();     var httpConfiguration = new HttpConfiguration();     WebApiConfig.Register(httpConfiguration);     var httpRouteData = new HttpRouteData(httpConfiguration.Routes["DefaultApi"],         new HttpRouteValueDictionary { { "controller", "category" } });     var controller = new CategoryController(commandBus.Object, categoryRepository.Object)     {         Request = new HttpRequestMessage(HttpMethod.Post, "http://localhost/api/category/")         {             Properties =             {                 { HttpPropertyKeys.HttpConfigurationKey, httpConfiguration },                 { HttpPropertyKeys.HttpRouteDataKey, httpRouteData }             }         }     };     // Act     CategoryModel category = new CategoryModel();     category.CategoryId = 0;     category.CategoryName = "";     // The ASP.NET pipeline doesn't run, so validation don't run.     controller.ModelState.AddModelError("", "mock error message");     var response = controller.Post(category);     // Assert     Assert.AreEqual(HttpStatusCode.BadRequest, response.StatusCode);   } In the above code block, we have written two unit methods, Post_Category_Returns_CreatedStatusCode and Post_EmptyCategory_Returns_BadRequestStatusCode. The unit test method Post_Category_Returns_CreatedStatusCode  verifies the behaviour 1 and 3, that we have defined in the beginning of the section “Unit Test for HTTP Post”. The unit test method Post_EmptyCategory_Returns_BadRequestStatusCode verifies the behaviour 2. For extracting the data from response, we call Content.ReadAsStringAsync().Result of HttpResponseMessage object and deserializeit it with Json Convertor. The implementation of HTTP Post in the CategoryController is provided below: // POST /api/category public HttpResponseMessage Post(CategoryModel category) {       if (ModelState.IsValid)     {         var command = new CreateOrUpdateCategoryCommand(category.CategoryId, category.CategoryName, category.Description);         var result = commandBus.Submit(command);         if (result.Success)         {                               var response = Request.CreateResponse(HttpStatusCode.Created, category);             string uri = Url.Link("DefaultApi", new { id = category.CategoryId });             response.Headers.Location = new Uri(uri);             return response;         }     }     else     {         return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);     }     throw new HttpResponseException(HttpStatusCode.BadRequest); } The unit test implementation for HTTP Put and HTTP Delete are very similar to the unit test we have written for  HTTP Get. The complete unit tests for the CategoryController is given below: [TestFixture] public class CategoryApiControllerTest { private Mock<ICategoryRepository> categoryRepository; private Mock<ICommandBus> commandBus; [SetUp] public void SetUp() {     categoryRepository = new Mock<ICategoryRepository>();     commandBus = new Mock<ICommandBus>(); } [Test] public void Get_All_Returns_AllCategory() {     // Arrange        IEnumerable<CategoryWithExpense> fakeCategories = GetCategories();     categoryRepository.Setup(x => x.GetCategoryWithExpenses()).Returns(fakeCategories);     CategoryController controller = new CategoryController(commandBus.Object, categoryRepository.Object)     {         Request = new HttpRequestMessage()                 {                     Properties = { { HttpPropertyKeys.HttpConfigurationKey, new HttpConfiguration() } }                 }     };     // Act     var categories = controller.Get();     // Assert     Assert.IsNotNull(categories, "Result is null");     Assert.IsInstanceOf(typeof(IEnumerable<CategoryWithExpense>),categories, "Wrong Model");             Assert.AreEqual(3, categories.Count(), "Got wrong number of Categories"); }        [Test] public void Get_CorrectCategoryId_Returns_Category() {     // Arrange        IEnumerable<CategoryWithExpense> fakeCategories = GetCategories();     categoryRepository.Setup(x => x.GetCategoryWithExpenses()).Returns(fakeCategories);     CategoryController controller = new CategoryController(commandBus.Object, categoryRepository.Object)     {         Request = new HttpRequestMessage()         {             Properties = { { HttpPropertyKeys.HttpConfigurationKey, new HttpConfiguration() } }         }     };     // Act     var response = controller.Get(1);     // Assert     Assert.AreEqual(HttpStatusCode.OK, response.StatusCode);     var category = JsonConvert.DeserializeObject<CategoryWithExpense>(response.Content.ReadAsStringAsync().Result);     Assert.AreEqual(1, category.CategoryId, "Got wrong number of Categories"); } [Test] public void Get_InValidCategoryId_Returns_NotFound() {     // Arrange        IEnumerable<CategoryWithExpense> fakeCategories = GetCategories();     categoryRepository.Setup(x => x.GetCategoryWithExpenses()).Returns(fakeCategories);     CategoryController controller = new CategoryController(commandBus.Object, categoryRepository.Object)     {         Request = new HttpRequestMessage()         {             Properties = { { HttpPropertyKeys.HttpConfigurationKey, new HttpConfiguration() } }         }     };     // Act     var response = controller.Get(5);     // Assert     Assert.AreEqual(HttpStatusCode.NotFound, response.StatusCode);            } [Test] public void Post_Category_Returns_CreatedStatusCode() {     // Arrange        commandBus.Setup(c => c.Submit(It.IsAny<CreateOrUpdateCategoryCommand>())).Returns(new CommandResult(true));     Mapper.CreateMap<CategoryFormModel, CreateOrUpdateCategoryCommand>();          var httpConfiguration = new HttpConfiguration();     WebApiConfig.Register(httpConfiguration);     var httpRouteData = new HttpRouteData(httpConfiguration.Routes["DefaultApi"],         new HttpRouteValueDictionary { { "controller", "category" } });     var controller = new CategoryController(commandBus.Object, categoryRepository.Object)     {         Request = new HttpRequestMessage(HttpMethod.Post, "http://localhost/api/category/")         {             Properties =             {                 { HttpPropertyKeys.HttpConfigurationKey, httpConfiguration },                 { HttpPropertyKeys.HttpRouteDataKey, httpRouteData }             }         }     };     // Act     CategoryModel category = new CategoryModel();     category.CategoryId = 1;     category.CategoryName = "Mock Category";     var response = controller.Post(category);               // Assert     Assert.AreEqual(HttpStatusCode.Created, response.StatusCode);     var newCategory = JsonConvert.DeserializeObject<CategoryModel>(response.Content.ReadAsStringAsync().Result);     Assert.AreEqual(string.Format("http://localhost/api/category/{0}", newCategory.CategoryId), response.Headers.Location.ToString()); } [Test] public void Post_EmptyCategory_Returns_BadRequestStatusCode() {     // Arrange        commandBus.Setup(c => c.Submit(It.IsAny<CreateOrUpdateCategoryCommand>())).Returns(new CommandResult(true));     Mapper.CreateMap<CategoryFormModel, CreateOrUpdateCategoryCommand>();     var httpConfiguration = new HttpConfiguration();     WebApiConfig.Register(httpConfiguration);     var httpRouteData = new HttpRouteData(httpConfiguration.Routes["DefaultApi"],         new HttpRouteValueDictionary { { "controller", "category" } });     var controller = new CategoryController(commandBus.Object, categoryRepository.Object)     {         Request = new HttpRequestMessage(HttpMethod.Post, "http://localhost/api/category/")         {             Properties =             {                 { HttpPropertyKeys.HttpConfigurationKey, httpConfiguration },                 { HttpPropertyKeys.HttpRouteDataKey, httpRouteData }             }         }     };     // Act     CategoryModel category = new CategoryModel();     category.CategoryId = 0;     category.CategoryName = "";     // The ASP.NET pipeline doesn't run, so validation don't run.     controller.ModelState.AddModelError("", "mock error message");     var response = controller.Post(category);     // Assert     Assert.AreEqual(HttpStatusCode.BadRequest, response.StatusCode);   } [Test] public void Put_Category_Returns_OKStatusCode() {     // Arrange        commandBus.Setup(c => c.Submit(It.IsAny<CreateOrUpdateCategoryCommand>())).Returns(new CommandResult(true));     Mapper.CreateMap<CategoryFormModel, CreateOrUpdateCategoryCommand>();     CategoryController controller = new CategoryController(commandBus.Object, categoryRepository.Object)     {         Request = new HttpRequestMessage()         {             Properties = { { HttpPropertyKeys.HttpConfigurationKey, new HttpConfiguration() } }         }     };     // Act     CategoryModel category = new CategoryModel();     category.CategoryId = 1;     category.CategoryName = "Mock Category";     var response = controller.Put(category.CategoryId,category);     // Assert     Assert.AreEqual(HttpStatusCode.OK, response.StatusCode);    } [Test] public void Delete_Category_Returns_NoContentStatusCode() {     // Arrange              commandBus.Setup(c => c.Submit(It.IsAny<DeleteCategoryCommand >())).Returns(new CommandResult(true));     CategoryController controller = new CategoryController(commandBus.Object, categoryRepository.Object)     {         Request = new HttpRequestMessage()         {             Properties = { { HttpPropertyKeys.HttpConfigurationKey, new HttpConfiguration() } }         }     };     // Act               var response = controller.Delete(1);     // Assert     Assert.AreEqual(HttpStatusCode.NoContent, response.StatusCode);   } private static IEnumerable<CategoryWithExpense> GetCategories() {     IEnumerable<CategoryWithExpense> fakeCategories = new List<CategoryWithExpense> {     new CategoryWithExpense {CategoryId=1, CategoryName = "Test1", Description="Test1Desc", TotalExpenses=1000},     new CategoryWithExpense {CategoryId=2, CategoryName = "Test2", Description="Test2Desc",TotalExpenses=2000},     new CategoryWithExpense { CategoryId=3, CategoryName = "Test3", Description="Test3Desc",TotalExpenses=3000}       }.AsEnumerable();     return fakeCategories; } }  The complete implementation for the Api Controller, CategoryController is given below: public class CategoryController : ApiController {       private readonly ICommandBus commandBus;     private readonly ICategoryRepository categoryRepository;     public CategoryController(ICommandBus commandBus, ICategoryRepository categoryRepository)     {         this.commandBus = commandBus;         this.categoryRepository = categoryRepository;     } public IQueryable<CategoryWithExpense> Get() {     var categories = categoryRepository.GetCategoryWithExpenses().AsQueryable();     return categories; }   // GET /api/category/5 public HttpResponseMessage Get(int id) {     var category = categoryRepository.GetCategoryWithExpenses().Where(c => c.CategoryId == id).SingleOrDefault();     if (category == null)     {         return Request.CreateResponse(HttpStatusCode.NotFound);     }     return Request.CreateResponse(HttpStatusCode.OK, category); }   // POST /api/category public HttpResponseMessage Post(CategoryModel category) {       if (ModelState.IsValid)     {         var command = new CreateOrUpdateCategoryCommand(category.CategoryId, category.CategoryName, category.Description);         var result = commandBus.Submit(command);         if (result.Success)         {                               var response = Request.CreateResponse(HttpStatusCode.Created, category);             string uri = Url.Link("DefaultApi", new { id = category.CategoryId });             response.Headers.Location = new Uri(uri);             return response;         }     }     else     {         return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);     }     throw new HttpResponseException(HttpStatusCode.BadRequest); }   // PUT /api/category/5 public HttpResponseMessage Put(int id, CategoryModel category) {     if (ModelState.IsValid)     {         var command = new CreateOrUpdateCategoryCommand(category.CategoryId, category.CategoryName, category.Description);         var result = commandBus.Submit(command);         return Request.CreateResponse(HttpStatusCode.OK, category);     }     else     {         return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);     }     throw new HttpResponseException(HttpStatusCode.BadRequest); }       // DELETE /api/category/5     public HttpResponseMessage Delete(int id)     {         var command = new DeleteCategoryCommand { CategoryId = id };         var result = commandBus.Submit(command);         if (result.Success)         {             return new HttpResponseMessage(HttpStatusCode.NoContent);         }             throw new HttpResponseException(HttpStatusCode.BadRequest);     } } Source Code The EFMVC app can download from http://efmvc.codeplex.com/ . The unit test project can be found from the project EFMVC.Tests and Web API project can be found from EFMVC.Web.API.

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• With which class to start Test Driven Development of card game application? And what would be the next 5 to 7 tests?

  - by Maxis

  I have started to write card game applications. Some model classes: CardSuit, CardValue, Card Deck, IDeckCreator, RegularDeckCreator, DoubleDeckCreator Board Hand and some game classes: Turn, TurnHandler IPlayer, ComputerPlayer, HumanPlayer IAttackStrategy, SimpleAttachStrategy, IDefenceStrategy, SimpleDefenceStrategy GameData, Game are already written. My idea is to create engine, where two computer players could play game and then later I could add UI part. Already for some time I'm reading about Test Driven Development (TDD) and I have idea to start writing application from scratch, as currently I have tendency to write not needed code, which seems usable in future. Also code doesn't have any tests and it is hard to add them now. Seems that TDD could improve all these issue - minimum of needed code, good test coverage and also could help to come to right application design. But I have one issue - I can't decide from where to start TDD? Should I start from bottom - Card related classes or somewhere on top - Game, TurnHandler, ... ? With which class you would start? And what would be the next 5 to 7 tests? (use the card game you know the best) I would like to start TDD with your help and then continue on my own!

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• Windows 2008, IIS7 and virtual directories

  - by Thomas

  I created a virtual directory called test (C:\test) under the Default Web Site and added two simple test files (one html and one aspx). I thought I had to add the IUSR and NetworkService (for application pools) to C:\test and grant the users appropriate rights in order for IIS7 to serve the content. It appears that is not the case at all as I can view any files in the virtual directory (even if I convert it to an application) without changing or adding any security settings on the C:\test folder. I just installed IIS7 with ASP.NET on Windows 2008 without changing any settings besides adding the virtual directory. Am I missing something? Even my book on IIS7 states that the user accounts should be added an appropriate rights should be added. I added the following to answer the comments: I am referencing the file using a public IP http://xxx.xxx.xxx.xxx/test/one.html and the IP nor localhost is in my trusted sites. I am not signed in on the server at all as I am accessing the content from my home machine and the content is on my production server. The following users/groups have access to c:\test on the server (Creator Owner, System, Administrators, Users) and the app pool is running under the default NetworkService account. I basically installed win2008, added the IIS role with asp.net. I then opened IIS7, added a virtual directory and copied two files to the directory to test. It works which is great but I want to understand why it works. How is it that IIS7 can access files in the C:\test folder without any permissions set.

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• hMail server - sending copy of an e-mail changing the sender

  - by Beggycev

  Dear All please help me with following request. I am using hMail server in a company(test.com) and have several hundred of guest e-mail accounts ([email protected]). I need to accomplish this: When any of the guest e-mails receives a message(either from internal or external sender) this e-mail(or its copy) is sent to another address "[email protected]" which is the same for all of these guest e-mails. But I need the sender to be identified as the [email protected] not as the original sender which happens when I use forwarding. I tried to prepare a simple VBS script using the OnAcceptMessage event to accomplish this. and it works on my testing machine without internet connectivity but not in the production environment. To be specific, if I send an e-mail to [email protected] in my test env it is delivered to the [email protected] with [email protected] being a sender. But in the production env the e-mail stays in the guest mailbox with the original sender. I am interested in any solution, using a rule in hMail or script, anything is welcome. Thank you for any help! The script: Sub OnAcceptMessage(oClient, oMessage) 'creating application object in order to perform operations as hMail server administrator Dim obApp Set obApp = CreateObject("hMailServer.Application") Dim adminLogin Dim adminPassword 'Enter actual values for administrator account and password 'CHANGE HERE: adminLogin = "Admin_login" adminPassword = "password" Call obApp.Authenticate(adminLogin, adminPassword) Dim addrStart 'Take first 5 characters of recipients address addrStart = Mid(oMessage.To, 1, 5) 'if the recipient's address start with "guest" if addrStart = "guest" then Dim recipient Dim recipientAddress 'enter name of the recipient and respective e-mail address() 'CHANGE HERE: recipient = "FINAL" recipientAddress = "[email protected]" 'change the sender and sender e-mail address to the guest oMessage.FromAddress = oMessage.To oMessage.From = oMessage.To & "<" & oMessage.To & ">" 'delete recipients and enter a new one - the actual mps and its e-mail from the variables set above oMessage.ClearRecipients() oMessage.AddRecipient recipient, recipientAddress 'save the e-mail oMessage.save end if End Sub

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• Apache + mod_fcgid + perl = error 500

  - by f-aminov

  Hi guys! I'm trying to setup Apache2.2 with mod_fcgid and libapache2-mod-perl2 with no luck. I've created a fcgi-bin directory in the root directory of my website and put there a test.fcgi file with the following content: #!/usr/bin/perl use CGI; print "This is test.fcgi!\n"; While trying to access it via http://www.website.dom/fcgi-bin/test.fcgi I get error 500 (Internal Server Error). Here is my vhost config: <VirtualHost 95.131.29.226:8080> ServerName website.com DocumentRoot /var/www/data/website.com SuexecUserGroup user group ServerAlias www.website.com AddType application/x-httpd-php .php .php3 .php4 .php5 .phtml <Directory "/var/www/data/website.com/fcgi-bin/"> Options +ExecCGI Allow from all Order allow,deny AddHandler fcgid-script .fcgi </Directory> </VirtualHost> fcgid.conf: <IfModule mod_fcgid.c> AddHandler fcgid-script .fcgi SocketPath /var/lib/apache2/fcgid/sock IdleTimeout 3600 ProcessLifeTime 7200 MaxProcessCount 8 DefaultMaxClassProcessCount 2 IPCConnectTimeout 8 IPCCommTimeout 60 </IfModule> SuExec log: [2010-04-06 03:02:47]: uid: (500/equ) gid: (502/equ) cmd: test.fcgi Apache error log: test! test! [Tue Apr 06 03:02:51 2010] [notice] mod_fcgid: process /var/www/data/website.com/fcgi-bin/test.fcgi(26267) exit(communication error), terminated by calling exit(), return code: 0 [Tue Apr 06 03:02:53 2010] [notice] mod_fcgid: process /var/www/data/website.com/fcgi-bin/test.fcgi(26261) exit(server exited), terminated by calling exit(), return code: 0 I've no clue why I'm getting error 500, but when I'm trying to access this file using console ($ perl /var/www/data/website.com/fcgin-bin/test.fcgi) everthing works fine without any errors... Any suggestions on how to solve this problem would be greatly appreciated. Thank you!

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• Please, help writing a MIB

  - by facha

  I have a problem with an snmpwalk query returning snmp variables in a non-uniform way: .1.3.6.1.2.1.10.127.1.3.3.1.2.215 -> Hex-STRING: 24 37 4C 0C 65 0E .1.3.6.1.2.1.10.127.1.3.3.1.2.216 -> Hex-STRING: 24 37 4C 0B A2 DA .1.3.6.1.2.1.10.127.1.3.3.1.2.217 -> STRING: "$7L f:" .1.3.6.1.2.1.10.127.1.3.3.1.2.218 -> STRING: "$7L k2" As you can see, some variables are of a STRING type, others are Hex-STRING. So, I'm trying to write a simple MIB to force them all come out as Hex-STRING. This is where I've gotten so far: TEST-MIB DEFINITIONS ::= BEGIN PhysAddress ::= TEXTUAL-CONVENTION DISPLAY-HINT "1x:" STATUS current SYNTAX OCTET STRING test OBJECT-TYPE SYNTAX PhysAddresss MAX-ACCESS read-only STATUS current ::= { 1 3 6 1 2 1 10 127 1 3 3 1 2 } END However, snmpwalk doesn't seem to notice my textual convention (even though the "test" variable is being recognized). I still get a mixture of STIRNGs and Hex-STRINGs. Could anybody point to where is my mistake? snmpwalk -v2c -cpublic 192.168.1.2 TEST-MIB::test ... TEST-MIB::test.216 = Hex-STRING: 24 37 4C 0B A2 DA TEST-MIB::test.217 = STRING: "$7L f:"

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• Can I setup a test server and then transfer everything to a diff. production server?

  - by Justin

  Hello, I am going to be setting up a "real" server, but it's not being shipped for another week. I was planning on setting up most of the server's functionality using an extra workstation I have. I wanted to set-up Windows Server 2003 or 2008, IIS, Terminal Services, Firewall, and Antivirus on this regular machine. I'd also be installing software like Winzip and VMWare that'll be used on the server. I can't ghost the machine, as far as I've done in the past, because the motherboard/cpu/etc. will all be different. Is there any way to export all of the "server settings" or something like that so I can move everything from test to production? Is there any software out there that does something similar to this? Some things I'm going to have to wait on such as setting up the file server completely in its raid configuration, but I'd like to get the simple server stuff and network setup out of the way. Has anyone done this before? Do I need software, open-source or not, to do this? Or maybe there's a way to export all the server settings in some way? Thanks in advance! Justin

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• stdout, stderr, and what else? (going insane parsing slapadd output)

  - by user64204

  I am using slapadd to restore a backup. That backup contains 45k entries which takes a while to restore so I need to get some progress update from slapadd. Luckily for me there is the -v switch which gives an output similar to this one: added: "[email protected],ou=People,dc=example,dc=org" (00003d53) added: "[email protected],ou=People,dc=example,dc=org" (00003d54) added: "[email protected],ou=People,dc=example,dc=org" (00003d55) .######## 44.22% eta 05m05s elapsed 04m spd 29.2 k/s added: "[email protected],ou=People,dc=example,dc=org" (00003d56) added: "[email protected],ou=People,dc=example,dc=org" (00003d57) added: "[email protected],ou=People,dc=example,dc=org" (00003d58) added: "[email protected],ou=People,dc=example,dc=org" (00003d59) Every N entries added, slapadd writes a progress update output line (.######## 44.22% eta 05m05s elapsed ...) which I want to keep and an output line for every entry created which I want to hide because it exposes people's email address but still want to count them to know how many users were imported The way I thought about hiding emails and showing the progress update is this: $ slapadd -v ... 2>&1 | tee log.txt | grep '########' # => would give me real-time progress update $ grep "added" log.txt | wc -l # => once backup has been restored I would know how many users were added I tried different variations of the above, and whatever I try I can't grep the progress update output line. I traced slapadd as follows: sudo strace slapadd -v ... And here is what I get: write(2, "added: \"[email protected]"..., 78added: "[email protected],ou=People,dc=example,dc=org" (00000009) ) = 78 gettimeofday({1322645227, 253338}, NULL) = 0 _######## 44.22% eta 05m05s elapsed 04m spd 29.2 k/s ) = 80 write(2, "\n", 1 ) As you can see, the percentage line isn't sent to either stdout or stderr (FYI I have validated with known working and failing commands that 2 is stderr and 1 is stdout) Q1: Where is the progress update output line going? Q2: How can I grep on it while sending stderr to a file? Additional info: I'm running Openldap 2.4.21 on ubuntu server 10.04

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• SRM 4 Test Fails with message for some VM : Error: A specified parameter was not correct.

  - by Setesh

  Here are my architecture : For the protected site 4 Host VSphere Enterprise Plus, each one with 2 HBAs FC connected to the switch fabric, connected to an EMC CX4-120 1 VCenter 1 SRM For the recovery site 2 Hosts Vsphere 4 1 Vcenter 1 SRM 1 CX-4-120 The CX4-120 is connected to the second CX4-120 with ISCSI and the MirrorView / Asynchronous. I synchronise for the time 6 Lun on a FC DAE, 2 on a S-ATA DAE I have allocated 30% of the amount synchronised LUN for the SNAPSHOT us, but I have allocated them only on my S-ATA II DAE. It does not make a problem, my snapshot are correctly active. All the installation is new (hardware and software), installed in January with the last files available in download. I have a strange problem, and it's random, sometimes when I run a test on my RP, some VMs have this error : Error: A specified parameter was not correct. I don't know where to look. Any help is appreciated... PS : I have checked on all the VMs, no Floppy disk or CD attached. PS2 : There is severals VMs with RDM and OCFS2 filesystems on it.

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• How to configure hostname for `apache22` package on FreeBSD?

  - by Eonil

  I'm configuring development & test FreeBSD machine on VM. I installed apache22 package and restarted. But the daemon does not started with this error: %apachectl start httpd: apr_sockaddr_info_get() failed for test.box httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName (13)Permission denied: make_sock: could not bind to address [::]:80 (13)Permission denied: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs % My hostname is test.box. Because this is temporary test box, it has no real domain-name. But I used 2-level name to avoid long time waiting of sshd on booting. However, I searched web, and I modified /etc/hosts file like this (I didn't touches this file before): # This is original configuration #::1 localhost localhost.my.domain #127.0.0.1 localhost localhost.my.domain # New configuration ::1 localhost test.box 127.0.0.1 localhost test.box 127.0.0.1 test.box test Now apache fails with this error message: %apachectl start httpd: Could not reliably determine the server's fully qualified domain name, using test.box for ServerName (13)Permission denied: make_sock: could not bind to address [::]:80 (13)Permission denied: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs % I don't know what's required now. Please let me know reason and solution of this error. ---- (edit) ---- The permission errors are caused from omission of sudo.

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• HSphere - Only sees Apache 2 Test Page after forced shutdown?

  - by Darkwoof

  Hi, I have a dedicated server running on a Dell PowerEdge 850 with CentOS 4.4 and HSphere 3.0 Patch 6 colocated at a datacenter. Last night my hosting company had to schedule a change in the power bar, and I gave the go ahead for them to shut down the server and bring it up when they are done. Since they do not have admin access to the machine, I suppose they did a forced shutdown. When the machine was brought up, I found that all my domains (and sub-domains) are now pointing to an "Apache 2 Test Page" instead of the pre-configured sites that were running prior to the shutdown. This apparently only affects the standard sites running on port 80 - my Webmin instance running at port 1000 is still accessible for example, as well as my HSphere control panel running at port 8080. I've checked the config settings using the HSphere UI for each of the sites, and didn't find anything wrong. I've also tried rebooting the server via SSH, which does not rectify the problem. I've previously done reboots with no issues; the sites would just come right back up when its done, but not this time. I'm guessing some configuration file got corrupted or overwritten this time? Anyone with experience with HSphere and can provide some advice on what's happened and how to solve it? Thanks. (I do not have an active support agreeement for HSphere since Parallels took over and increased the min. license to 200. I only had 25 license for use by family and friends.) Thanks in advance.

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• maximum size filesystem on my test .... approach?

  - by jocco

  Hello all I'm new at the site, and I have a question. I got this question at a test and really like to know the correct approach to solving this problem? Here is the question. In an indexed filesystem the first indexblock (inode) has 12 direct pointers and 1 pointer to an indirect indexblock. The filesystem is implemented on a disk with a diskblock-size of 1024 bytes. All pointers are 32 bit. Question: what is the maximum filesize (Kilobytes) of this filesystem? If it's possible not an just an answer but an explanation. edit: It was a multiple choice btw with 4 answers a. 13 K b. 268 K c. 524 K d. 1036 K As for my approach I only got as far as to know that 1 pointer is 32 bit Also I found something else here on the site which seems very usefull. http://stackoverflow.com/questions/2755006/understanding-the-concept-of-inodes Ok i got this far There are 12 blocks and each block is 1024 bytes. 1024 * 12 = 12288 bytes or 12 KB directly accessible. Please correct me if I'm wrong. Each pointer is 32 Bit = 4Byte And to be honest at this point I'm starting to get confused especially since my answer is way over any of my multiple choice answers.

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• Ajax Control Toolkit and Superexpert

  - by Stephen Walther

  Microsoft has asked my company, Superexpert Consulting, to take ownership of the development and maintenance of the Ajax Control Toolkit moving forward. In this blog entry, I discuss our strategy for improving the Ajax Control Toolkit. Why the Ajax Control Toolkit? The Ajax Control Toolkit is one of the most popular projects on CodePlex. In fact, some have argued that it is among the most successful open-source projects of all time. It consistently receives over 3,500 downloads a day (not weekends -- workdays). A mind-boggling number of developers use the Ajax Control Toolkit in their ASP.NET Web Forms applications. Why does the Ajax Control Toolkit continue to be such a popular project? The Ajax Control Toolkit fills a strong need in the ASP.NET Web Forms world. The Toolkit enables Web Forms developers to build richly interactive JavaScript applications without writing any JavaScript. For example, by taking advantage of the Ajax Control Toolkit, a Web Forms developer can add modal dialogs, popup calendars, and client tabs to a web application simply by dragging web controls onto a page. The Ajax Control Toolkit is not for everyone. If you are comfortable writing JavaScript then I recommend that you investigate using jQuery plugins instead of the Ajax Control Toolkit. However, if you are a Web Forms developer and you don’t want to get your hands dirty writing JavaScript, then the Ajax Control Toolkit is a great solution. The Ajax Control Toolkit is Vast The Ajax Control Toolkit consists of 40 controls. That’s a lot of controls (For the sake of comparison, jQuery UI consists of only 8 controls – those slackers J). Furthermore, developers expect the Ajax Control Toolkit to work on browsers both old and new. For example, people expect the Ajax Control Toolkit to work with Internet Explorer 6 and Internet Explorer 9 and every version of Internet Explorer in between. People also expect the Ajax Control Toolkit to work on the latest versions of Mozilla Firefox, Apple Safari, and Google Chrome. And, people expect the Ajax Control Toolkit to work with different operating systems. Yikes, that is a lot of combinations. The biggest challenge which my company faces in supporting the Ajax Control Toolkit is ensuring that the Ajax Control Toolkit works across all of these different browsers and operating systems. Testing, Testing, Testing Because we wanted to ensure that we could easily test the Ajax Control Toolkit with different browsers, the very first thing that we did was to set up a dedicated testing server. The dedicated server -- named Schizo -- hosts 4 virtual machines so that we can run Internet Explorer 6, Internet Explorer 7, Internet Explorer 8, and Internet Explorer 9 at the same time (We also use the virtual machines to host the latest versions of Firefox, Chrome, Opera, and Safari). The five developers on our team (plus me) can each publish to a separate FTP website on the testing server. That way, we can quickly test how changes to the Ajax Control Toolkit affect different browsers. QUnit Tests for the Ajax Control Toolkit Introducing regressions – introducing new bugs when trying to fix existing bugs – is the concern which prevents me from sleeping well at night. There are so many people using the Ajax Control Toolkit in so many unique scenarios, that it is difficult to make improvements to the Ajax Control Toolkit without introducing regressions. In order to avoid regressions, we decided early on that it was extremely important to build good test coverage for the 40 controls in the Ajax Control Toolkit. We’ve been focusing a lot of energy on building automated JavaScript unit tests which we can use to help us discover regressions. We decided to write the unit tests with the QUnit test framework. We picked QUnit because it is quickly becoming the standard unit testing framework in the JavaScript world. For example, it is the unit testing framework used by the jQuery team, the jQuery UI team, and many jQuery UI plugin developers. We had to make several enhancements to the QUnit framework in order to test the Ajax Control Toolkit. For example, QUnit does not support tests which include postbacks. We modified the QUnit framework so that it works with IFrames so we could perform postbacks in our automated tests. At this point, we have written hundreds of QUnit tests. For example, we have written 135 QUnit tests for the Accordion control. The QUnit tests are included with the Ajax Control Toolkit source code in a project named AjaxControlToolkit.Tests. You can run all of the QUnit tests contained in the project by opening the Default.aspx page. Automating the QUnit Tests across Multiple Browsers Automated tests are useless if no one ever runs them. In order for the QUnit tests to be useful, we needed an easy way to run the tests automatically against a matrix of browsers. We wanted to run the unit tests against Internet Explorer 6, Internet Explorer 7, Internet Explorer 8, Internet Explorer 9, Firefox, Chrome, and Safari automatically. Expecting a developer to run QUnit tests against every browser after every check-in is just too much to expect. It takes 20 seconds to run the Accordion QUnit tests. We are testing against 8 browsers. That would require the developer to open 8 browsers and wait for the results after each change in code. Too much work. Therefore, we built a JavaScript Test Server. Our JavaScript Test Server project was inspired by John Resig’s TestSwarm project. The JavaScript Test Server runs our QUnit tests in a swarm of browsers (running on different operating systems) automatically. Here’s how the JavaScript Test Server works: 1. We created an ASP.NET page named RunTest.aspx that constantly polls the JavaScript Test Server for a new set of QUnit tests to run. After the RunTest.aspx page runs the QUnit tests, the RunTest.aspx records the test results back to the JavaScript Test Server. 2. We opened the RunTest.aspx page on instances of Internet Explorer 6, Internet Explorer 7, Internet Explorer 8, Internet Explorer 9, FireFox, Chrome, Opera, Google, and Safari. Now that we have the JavaScript Test Server setup, we can run all of our QUnit tests against all of the browsers which we need to support with a single click of a button. A New Release of the Ajax Control Toolkit Each Month The Ajax Control Toolkit Issue Tracker contains over one thousand five hundred open issues and feature requests. So we have plenty of work on our plates J At CodePlex, anyone can vote for an issue to be fixed. Originally, we planned to fix issues in order of their votes. However, we quickly discovered that this approach was inefficient. Constantly switching back and forth between different controls was too time-consuming. It takes time to re-familiarize yourself with a control. Instead, we decided to focus on two or three controls each month and really focus on fixing the issues with those controls. This way, we can fix sets of related issues and avoid the randomization caused by context switching. Our team works in monthly sprints. We plan to do another release of the Ajax Control Toolkit each and every month. So far, we have competed one release of the Ajax Control Toolkit which was released on April 1, 2011. We plan to release a new version in early May. Conclusion Fortunately, I work with a team of smart developers. We currently have 5 developers working on the Ajax Control Toolkit (not full-time, they are also building two very cool ASP.NET MVC applications). All the developers who work on our team are required to have strong JavaScript, jQuery, and ASP.NET MVC skills. In the interest of being as transparent as possible about our work on the Ajax Control Toolkit, I plan to blog frequently about our team’s ongoing work. In my next blog entry, I plan to write about the two Ajax Control Toolkit controls which are the focus of our work for next release.

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• ParallelWork: Feature rich multithreaded fluent task execution library for WPF

  - by oazabir

  ParallelWork is an open source free helper class that lets you run multiple work in parallel threads, get success, failure and progress update on the WPF UI thread, wait for work to complete, abort all work (in case of shutdown), queue work to run after certain time, chain parallel work one after another. It’s more convenient than using .NET’s BackgroundWorker because you don’t have to declare one component per work, nor do you need to declare event handlers to receive notification and carry additional data through private variables. You can safely pass objects produced from different thread to the success callback. Moreover, you can wait for work to complete before you do certain operation and you can abort all parallel work while they are in-flight. If you are building highly responsive WPF UI where you have to carry out multiple job in parallel yet want full control over those parallel jobs completion and cancellation, then the ParallelWork library is the right solution for you. I am using the ParallelWork library in my PlantUmlEditor project, which is a free open source UML editor built on WPF. You can see some realistic use of the ParallelWork library there. Moreover, the test project comes with 400 lines of Behavior Driven Development flavored tests, that confirms it really does what it says it does. The source code of the library is part of the “Utilities” project in PlantUmlEditor source code hosted at Google Code. The library comes in two flavors, one is the ParallelWork static class, which has a collection of static methods that you can call. Another is the Start class, which is a fluent wrapper over the ParallelWork class to make it more readable and aesthetically pleasing code. ParallelWork allows you to start work immediately on separate thread or you can queue a work to start after some duration. You can start an immediate work in a new thread using the following methods: void StartNow(Action doWork, Action onComplete) void StartNow(Action doWork, Action onComplete, Action<Exception> failed) For example, ParallelWork.StartNow(() => { workStartedAt = DateTime.Now; Thread.Sleep(howLongWorkTakes); }, () => { workEndedAt = DateTime.Now; }); Or you can use the fluent way Start.Work: Start.Work(() => { workStartedAt = DateTime.Now; Thread.Sleep(howLongWorkTakes); }) .OnComplete(() => { workCompletedAt = DateTime.Now; }) .Run(); Besides simple execution of work on a parallel thread, you can have the parallel thread produce some object and then pass it to the success callback by using these overloads: void StartNow<T>(Func<T> doWork, Action<T> onComplete) void StartNow<T>(Func<T> doWork, Action<T> onComplete, Action<Exception> fail) For example, ParallelWork.StartNow<Dictionary<string, string>>( () => { test = new Dictionary<string,string>(); test.Add("test", "test"); return test; }, (result) => { Assert.True(result.ContainsKey("test")); }); Or, the fluent way: Start<Dictionary<string, string>>.Work(() => { test = new Dictionary<string, string>(); test.Add("test", "test"); return test; }) .OnComplete((result) => { Assert.True(result.ContainsKey("test")); }) .Run(); You can also start a work to happen after some time using these methods: DispatcherTimer StartAfter(Action onComplete, TimeSpan duration) DispatcherTimer StartAfter(Action doWork,Action onComplete,TimeSpan duration) You can use this to perform some timed operation on the UI thread, as well as perform some operation in separate thread after some time. ParallelWork.StartAfter( () => { workStartedAt = DateTime.Now; Thread.Sleep(howLongWorkTakes); }, () => { workCompletedAt = DateTime.Now; }, waitDuration); Or, the fluent way: Start.Work(() => { workStartedAt = DateTime.Now; Thread.Sleep(howLongWorkTakes); }) .OnComplete(() => { workCompletedAt = DateTime.Now; }) .RunAfter(waitDuration);   There are several overloads of these functions to have a exception callback for handling exceptions or get progress update from background thread while work is in progress. For example, I use it in my PlantUmlEditor to perform background update of the application. // Check if there's a newer version of the app Start<bool>.Work(() => { return UpdateChecker.HasUpdate(Settings.Default.DownloadUrl); }) .OnComplete((hasUpdate) => { if (hasUpdate) { if (MessageBox.Show(Window.GetWindow(me), "There's a newer version available. Do you want to download and install?", "New version available", MessageBoxButton.YesNo, MessageBoxImage.Information) == MessageBoxResult.Yes) { ParallelWork.StartNow(() => { var tempPath = System.IO.Path.Combine( Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), Settings.Default.SetupExeName); UpdateChecker.DownloadLatestUpdate(Settings.Default.DownloadUrl, tempPath); }, () => { }, (x) => { MessageBox.Show(Window.GetWindow(me), "Download failed. When you run next time, it will try downloading again.", "Download failed", MessageBoxButton.OK, MessageBoxImage.Warning); }); } } }) .OnException((x) => { MessageBox.Show(Window.GetWindow(me), x.Message, "Download failed", MessageBoxButton.OK, MessageBoxImage.Exclamation); }); The above code shows you how to get exception callbacks on the UI thread so that you can take necessary actions on the UI. Moreover, it shows how you can chain two parallel works to happen one after another. Sometimes you want to do some parallel work when user does some activity on the UI. For example, you might want to save file in an editor while user is typing every 10 second. In such case, you need to make sure you don’t start another parallel work every 10 seconds while a work is already queued. You need to make sure you start a new work only when there’s no other background work going on. Here’s how you can do it: private void ContentEditor_TextChanged(object sender, EventArgs e) { if (!ParallelWork.IsAnyWorkRunning()) { ParallelWork.StartAfter(SaveAndRefreshDiagram, TimeSpan.FromSeconds(10)); } } If you want to shutdown your application and want to make sure no parallel work is going on, then you can call the StopAll() method. ParallelWork.StopAll(); If you want to wait for parallel works to complete without a timeout, then you can call the WaitForAllWork(TimeSpan timeout). It will block the current thread until the all parallel work completes or the timeout period elapses. result = ParallelWork.WaitForAllWork(TimeSpan.FromSeconds(1)); The result is true, if all parallel work completed. If it’s false, then the timeout period elapsed and all parallel work did not complete. For details how this library is built and how it works, please read the following codeproject article: ParallelWork: Feature rich multithreaded fluent task execution library for WPF http://www.codeproject.com/KB/WPF/parallelwork.aspx If you like the article, please vote for me.

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• Microsoft Channel 9 Interviews Mei Liang to Introduce Sample Browser Extension for Visual Studio 2012 and 2010

  - by Jialiang

  This morning, Microsoft Channel 9 interviewed Mei Liang - Group Manager of Microsoft All-In-One Code Framework - to introduce the newest Sample Browser extension for Visual Studio 2012 &2010.   This extension provides a way for developers to search and download more than 4500 code samples from within Visual Studio, including over 700 Windows 8 samples and more than 1000 All-In-One Code Framework customer-driven code samples. Mei shows us not only the extension, but also the standalone version of the Sample Browser.   http://channel9.msdn.com/Shows/Visual-Studio-Toolbox/Sample-Browser-Visual-Studio-Extension   Microsoft All-In-One Code Framework, working in close partnership with the Visual Studio product team and MSDN Samples Gallery, developed the Sample Browser extension for both Visual Studio 2012 and Visual Studio 2010.  As an effort to evolve the code sample use experience and improve developers' productivity, the Sample Browser allows programmers to search, download and open over 4500 code samples from within Visual Studio with just a few simple clicks.  If no existing code sample can meet the needs, developers can even request a code sample easily from Microsoft thanks to the free “Sample Request Service” offered by Microsoft All-In-One Code Framework.  Through innovations, the teams hope to put the power of tens of thousands of code samples at developers’ fingertips. In short 3 months, the Sample Browser Visual Studio Extension has been installed by 100K global users.  It is also selected as one of the six most highly regarded and commonly used tools for Visual Studio that will make your programming experience feel like never before.   Got to love the All-In-One Code Framework team! You guys know this is THE go to source for code samples. Get this extension and you'll never need to leave VS2012 (well except for bathroom trips, but that's TMI anyway... ;) Read More... From: Greg Duncan (Author of CoolThingOfTheDay) 9/6/2011 12:00 AM The one software design pattern that I have used in just about every application I’ve written is “cut-and-paste,” so the new “Sample Browser” – read sample as a noun not an adjective – is a great boon to my productivity. Read More... From: Jim O'Neil (Microsoft Developer Evangelist) 9/28/2011 12:00 AM Install: http://aka.ms/samplebrowservsx Microsoft All-In-One Code Framework also offers the standalone version of Sample Browser.   The standalone version is particularly useful to Visual Studio Express edition or Visual Studio 2008 users, who cannot install the Sample Browser Visual Studio extension.   From Grassroots’ Passion for Developers to the Innovation of Sample Browser This Sample Browser has come a very long way improving the code sample use experience.  The history can be traced back to a grass-root innovation three years ago.   In early 2009, a few MSDN forum support engineers observed that lots of developers were struggling to work in Visual Studio without adequate code samples. Programming tasks seem harder than they should be when you only read through the documentation.  Just a couple of lines of sample code could answer a lot of questions.   They had a brilliant idea: What if we produce code samples based on developers’ frequently asked programming tasks in forums, social networks and support incidents, and then aggregate all our sample code in a one-stop library to benefit developers?  And what if developers can request code samples directly from Microsoft, free of charge?  This small group of grassroots at Microsoft devoted their nights and weekends to prototyping such a customer-driven code sample library.  This simple idea eventually turned into “Microsoft All-In-One Code Framework”, aka. OneCode.  With the support from more and more passionate developers at Microsoft and the leaders in the Community and Online Support team and Microsoft Commercial Technical Services (CTS), the idea has become a continually growing library with over 1000 customer-driven code samples covering almost all Microsoft development technologies.  These code samples originated from developers’ common pains and needs should be able to help many developers.  However, if developers cannot easily discover the code samples, the effort would still be in vain.  So in early 2010, the team started the idea of Sample Browser to ease the discovery and access of these samples.  In just two months, the first version of Sample Browser was finished and released by a passionate developer.  It was a very simple application, only supporting the basic sample offline search.  Users had to download the whole 100MB sample package containing all samples first, and run the Sample Browser to search locally.   Though developers could not search and download samples on-demand, this simple application laid a solid foundation for the team’s continuous innovations of Sample Browsing experience. In 2011, MSDN Samples Gallery had a big refresh.  The online sample experience was brought to a new level thanks to its PM Steven Wilssens and the gallery team’s effort.  Microsoft All-In-One Code Framework Team saw the opportunity to realize the “on-demand” sample search and download feature with the new gallery.  The two teams formed a strong partnership to upload all the customer-driven code samples to MSDN Samples Gallery, and released the new version of Sample Browser to support “on-demand” sample downloading in April, 2011.  Mei Liang, the Group Manager of Microsoft All-In-One Code Framework, was interviewed by Channel 9 to demo the Sample Browser.  Customers love the effort and the innovation!!  This can be clearly seen from the user comments in the publishing page.   It was very encouraging to the team of All-In-One Code Framework. The team continues innovating and evolving the Sample Browser.  They found the Visual Studio product team this time, and integrated the Sample Browsing experience into the latest Visual Studio 2012.  The newly released Sample Browser Visual Studio extension makes good use of Visual Studio 2012 IDE such as the new Quick Launch bar, the code editor, the toolbar and menus to offer easy access to thousands of code samples from within the development environment.   The Visual Studio Senior Program Manager Lead - Anthony Cangialosi, the Program Manager - Murali Krishna Hosabettu Kamalesha, the MSDN Samples Gallery PM – Steven Wilssens, and the Visual Studio Senior Escalation Engineer - Ed Dore shared lots of insightful suggestions with the team.  Thanks to the brilliant cross-group collaboration inside Microsoft, tens of new features including “Local Language Support” and “Favorite Samples”, as well as a face-lifted user interface, were added to further enhance the user experience. Since the new Sample Browser Visual Studio extension was released, it has received over 100 thousand downloads and five-star ratings.  A customer told the team that he officially falls in LOVE with Microsoft All-In-One Code Framework.   The Sample Browser Innovation for Developers Never Stops! The teams would never stop improving the Sample Browser for developers’ easier lives.   The Microsoft All-In-One Code Framework, Visual Studio and MSDN Samples Gallery teams are working closely to develop the next version of Sample Browser.  Here are the key functions in development or in discussion.  We hope to learn your feedback of the effort.  You can submit your suggestions to the official Visual Studio UserVoice site.  We look forward to hearing from you! 1) Offline Sample Search This is one of the top feature requests that we have received for Sample Browser.   The Sample Browser will support the offline search mode so that developers can search downloaded code samples when they do not have internet access.  This is particularly useful to developers in Enterprises with strict proxy settings. 2) Code Snippet Support and Visual Studio Editor Integration Today, the Sample Browser supports downloading and opening sample project.   However, when developers are searching for code samples, a better user experience would be to see the code snippets in the search result first.  Developers can quickly decide if the code snippet is relevant.   They can also drag and drop the code snippet into the Visual Studio Editor to solve some simple programming tasks.  If developers want to learn more about the sample, they can then choose to download the sample project and open it in Visual Studio. 3) Enterprise Sample Sharing and Searching Large enterprises have many code samples for their own internal tools and APIs that are not appropriate to be shared publicly in MSDN Samples Gallery.   In that case, today’s Sample Browser and MSDN Samples Gallery cannot help these Enterprise developers.  The idea is to create a Code Sample Repository in TFS, and provide an additional Visual Studio extension for Enterprise developers to quickly share code samples to TFS.  The Sample Browser can be configured to connect to the TFS Code Sample Repository to search for and download code samples.  This would potentially enable the Enterprise developers to be more productive. 4) Windows Store Sample Browser With the upcoming release of Windows RT and Microsoft Surface, developers are facing a completely new world of application platform.   Not like laptop, people would often use Microsoft Surface in commute and in travel.  Internet may not be available.  Today’s Visual Studio cannot be installed and run on Windows RT, however, our enthusiastic developers would hope to spend every minute on code.  They love code!   The idea is to create a Windows Store version of Sample Browser. Search and download samples from the online Samples Gallery when the user has internet access. Browse the sample code files and learn the sample documentation of downloaded samples with or without internet access.   In addition to the "browse” function, the Sample Browser could further support “bookmark”, “learning notes”, “code review”, and “quick social sharing". Make full use of the new touch and Windows Store App UI to give developers a new “relaxing” code browsing and learning experience, anytime, anywhere. With Windows Store Sample Browser, developers can enjoy A new relaxing and enjoyable experience for developers to learn code samples You do not have to sit in front of desk and formally open Visual Studio to read code samples.  Many developers get sub-health due to staying in front of desk for a very long time.  With Windows RT, Microsoft Surface and this Windows Store Sample Browser combining with the online MSDN Samples Gallery, developers can sit in a sofa, relaxingly hold the tablet and enjoy to learn their beloved sample code with detailed documentation. Anytime, anywhere Whether you have internet access or not, whether you are at home, in office, or in commute/airplane, developers can always easily access and browse the sample code. Lightweight and fast Particularly for learning a small sample project, the Windows Store Sample Browser would be more lightweight and faster to open and browse the sample code. Please submit your feedback and suggestion to Visual Studio UserVoice.  We look forward to hearing from you and deliver a better and better sample use experience.  Happy Coding!   Special Thanks to People working behind the latest release of Sample Browser Visual Studio Extension and the great partnerships!

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• TDD/Tests too much an overhead/maintenance burden?

  - by MeshMan

  So you've heard it many times from those who do not truly understand the values of testing. Just to start things out, I'm a follower of Agile and Testing... I recently had a discussion about performing TDD on a product re-write where the current team does not practice unit testing on any level, and probably have never heard of the dependency injection technique or test patterns/design etc (we won't even get on to clean code). Now, I am fully responsible for the rewrite of this product and I'm told that attempting it in the fashion of TDD, will merely make it a maintenance nightmare and impossible for the team maintain. Furthermore, as it's a front-end application (not web-based), adding tests is pointless, as the business drive changes (by changes they mean improvements of course), the tests will become out of date, other developers who come on to the project in the future will not maintain them and become more of a burden for them to fix etc. I can understand that TDD in a team that does not currently hold any testing experience doesn't sound good, but my argument in this case is that I can teach my practice to those around me, but further more, I know that TDD makes BETTER software. Even if I was to produce the software using TDD, and throw all the tests away on handing it over to a maintenance team, it surely would be a better approach than not using TDD at all from the start? I've been shot down as I've mentioned doing TDD on most projects for a team that have never heard of it. The thought of "interfaces" and strange looking DI constructors scares them off... Can anyone please help me in what is normally a very short conversation of trying to sell TDD and my approach to people? I usually have a very short window of argument before falling at the knees to the company/team.

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• Updating Banshee to 2.4

  - by Lucasguy11

  I have banshee 2.2.1 with Ubuntu 11.10 I have been trying to update banshee to 2.4 (released yesterday) but it just isnt working, I have been using sudo add-apt-repository ppa:banshee-team/ppa in terminal, from the Banshee.fm website. but after running through terminal it says this: sudo add-apt-repository ppa:banshee-team/ppa You are about to add the following PPA to your system: PPA for Banshee Team This PPA contains the latest stable debs of Banshee for Ubuntu. To install Banshee, you must first enable the PPA on your system: 1. Open Software Sources (System->Administration->Software Sources) 2. Navigate to the "Third Party Sources" tab. 3. Click "Add" 4. Enter the APT line below that corresponds to your Ubuntu version that starts with "deb". 5. Click "Add Source" 6. Click "Close" 7. It will prompt you to reload your software cache. Click "Reload". 8. Now install the package "banshee" from Synaptic, or using the command below: sudo apt-get install banshee For those who wish to compile from trunk, add the deb-src line and then run "sudo apt-get build-dep" to install all required dependencies before starting to compile. Unstable (version which have odd minor version numbers) debs of Banshee can be found here: https://launchpad.net/~banshee-team/+archive/banshee-unstable More info: https://launchpad.net/~banshee-team/+archive/ppa Press [ENTER] to continue or ctrl-c to cancel adding it Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /tmp/tmp.OPAjxemDQr --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver hkp://keyserver.ubuntu.com:80/ --recv 9D2C2E0A3C88DD807EC787D74874D3686E80C6B7 gpg: requesting key 6E80C6B7 from hkp server keyserver.ubuntu.com gpg: key 6E80C6B7: "Launchpad PPA for Banshee Team" not changed gpg: Total number processed: 1 gpg: unchanged: 1 I believe I have the ppa but, im not sure. I need a step by step process to get this, ive been trying to figure it out for quite a while now...

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• Unable to decide weather to continue or quit and start a new carrier

  - by latif mohammad khan

  I am working in a small company. I have joined here for java developer ,but they told as i am fresher so work as Android developer . Then i asked one of my lecturer about Android developement.then he replied why going for mobile developement which is not standard(as nokia's symbain lost , mobile os changes quickly ) its better to get job as Java Developer. By listening his words i was bit not satisfied with my job and thought of leaving Job and search as java developer. But i dont have much confidence to search a job at that time(because i got job after 1 and half years after i passed out), i have decided to work as android developer(as learning new technology and practice java at home). On the first day they introduced me to team leads and they assigned under him. After few days i came to know that my team lead is having only 1 year experience. He(my team lead) joined here as a fresher and done r&d now is my Team lead. If i ask any doubt to him , he just search in internet and reply's my question (some times he explains wrongly) i correct it by myself by searching in net.In my company they don't use latest technologies,they dont follow any design patterns because they dont know them. They provide me very less pay and more work, i dont bother about pay because i am fresher but i bother about work which is not use(I feel like that because they dont use latest technologies,no design patterns,no proper team lead) What i thought was to learn from the company, Team leads how the project done. But there I feel like, i am wasting my time.If i go for another interview in future they ask latest technologies. Now i dont know what to do weather to quit the job and learn another language which have good demand like sap abap or to continue here. please provide me advice Thanks.

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• Benchmarking MySQL Replication with Multi-Threaded Slaves

  - by Mat Keep

  0 0 1 1145 6530 Homework 54 15 7660 14.0 Normal 0 false false false EN-US JA X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:Cambria; mso-ascii-font-family:Cambria; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Cambria; mso-hansi-theme-font:minor-latin; mso-ansi-language:EN-US;} The objective of this benchmark is to measure the performance improvement achieved when enabling the Multi-Threaded Slave enhancement delivered as a part MySQL 5.6. As the results demonstrate, Multi-Threaded Slaves delivers 5x higher replication performance based on a configuration with 10 databases/schemas. For real-world deployments, higher replication performance directly translates to: · Improved consistency of reads from slaves (i.e. reduced risk of reading "stale" data) · Reduced risk of data loss should the master fail before replicating all events in its binary log (binlog) The multi-threaded slave splits processing between worker threads based on schema, allowing updates to be applied in parallel, rather than sequentially. This delivers benefits to those workloads that isolate application data using databases - e.g. multi-tenant systems deployed in cloud environments. Multi-Threaded Slaves are just one of many enhancements to replication previewed as part of the MySQL 5.6 Development Release, which include: · Global Transaction Identifiers coupled with MySQL utilities for automatic failover / switchover and slave promotion · Crash Safe Slaves and Binlog · Optimized Row Based Replication · Replication Event Checksums · Time Delayed Replication These and many more are discussed in the “MySQL 5.6 Replication: Enabling the Next Generation of Web & Cloud Services” Developer Zone article  Back to the benchmark - details are as follows. Environment The test environment consisted of two Linux servers: · one running the replication master · one running the replication slave. Only the slave was involved in the actual measurements, and was based on the following configuration: - Hardware: Oracle Sun Fire X4170 M2 Server - CPU: 2 sockets, 6 cores with hyper-threading, 2930 MHz. - OS: 64-bit Oracle Enterprise Linux 6.1 - Memory: 48 GB Test Procedure Initial Setup: Two MySQL servers were started on two different hosts, configured as replication master and slave. 10 sysbench schemas were created, each with a single table: CREATE TABLE `sbtest` (    `id` int(10) unsigned NOT NULL AUTO_INCREMENT,    `k` int(10) unsigned NOT NULL DEFAULT '0',    `c` char(120) NOT NULL DEFAULT '',    `pad` char(60) NOT NULL DEFAULT '',    PRIMARY KEY (`id`),    KEY `k` (`k`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 10,000 rows were inserted in each of the 10 tables, for a total of 100,000 rows. When the inserts had replicated to the slave, the slave threads were stopped. The slave data directory was copied to a backup location and the slave threads position in the master binlog noted. 10 sysbench clients, each configured with 10 threads, were spawned at the same time to generate a random schema load against each of the 10 schemas on the master. Each sysbench client executed 10,000 "update key" statements: UPDATE sbtest set k=k+1 WHERE id = <random row> In total, this generated 100,000 update statements to later replicate during the test itself. Test Methodology: The number of slave workers to test with was configured using: SET GLOBAL slave_parallel_workers=<workers> Then the slave IO thread was started and the test waited for all the update queries to be copied over to the relay log on the slave. The benchmark clock was started and then the slave SQL thread was started. The test waited for the slave SQL thread to finish executing the 100k update queries, doing "select master_pos_wait()". When master_pos_wait() returned, the benchmark clock was stopped and the duration calculated. The calculated duration from the benchmark clock should be close to the time it took for the SQL thread to execute the 100,000 update queries. The 100k queries divided by this duration gave the benchmark metric, reported as Queries Per Second (QPS). Test Reset: The test-reset cycle was implemented as follows: · the slave was stopped · the slave data directory replaced with the previous backup · the slave restarted with the slave threads replication pointer repositioned to the point before the update queries in the binlog. The test could then be repeated with identical set of queries but a different number of slave worker threads, enabling a fair comparison. The Test-Reset cycle was repeated 3 times for 0-24 number of workers and the QPS metric calculated and averaged for each worker count. MySQL Configuration The relevant configuration settings used for MySQL are as follows: binlog-format=STATEMENT relay-log-info-repository=TABLE master-info-repository=TABLE As described in the test procedure, the slave_parallel_workers setting was modified as part of the test logic. The consequence of changing this setting is: 0 worker threads:    - current (i.e. single threaded) sequential mode    - 1 x IO thread and 1 x SQL thread    - SQL thread both reads and executes the events 1 worker thread:    - sequential mode    - 1 x IO thread, 1 x Coordinator SQL thread and 1 x Worker thread    - coordinator reads the event and hands it to the worker who executes 2+ worker threads:    - parallel execution    - 1 x IO thread, 1 x Coordinator SQL thread and 2+ Worker threads    - coordinator reads events and hands them to the workers who execute them Results Figure 1 below shows that Multi-Threaded Slaves deliver ~5x higher replication performance when configured with 10 worker threads, with the load evenly distributed across our 10 x schemas. This result is compared to the current replication implementation which is based on a single SQL thread only (i.e. zero worker threads). Figure 1: 5x Higher Performance with Multi-Threaded Slaves The following figure shows more detailed results, with QPS sampled and reported as the worker threads are incremented. The raw numbers behind this graph are reported in the Appendix section of this post. Figure 2: Detailed Results As the results above show, the configuration does not scale noticably from 5 to 9 worker threads. When configured with 10 worker threads however, scalability increases significantly. The conclusion therefore is that it is desirable to configure the same number of worker threads as schemas. Other conclusions from the results: · Running with 1 worker compared to zero workers just introduces overhead without the benefit of parallel execution. · As expected, having more workers than schemas adds no visible benefit. Aside from what is shown in the results above, testing also demonstrated that the following settings had a very positive effect on slave performance: relay-log-info-repository=TABLE master-info-repository=TABLE For 5+ workers, it was up to 2.3 times as fast to run with TABLE compared to FILE. Conclusion As the results demonstrate, Multi-Threaded Slaves deliver significant performance increases to MySQL replication when handling multiple schemas. This, and the other replication enhancements introduced in MySQL 5.6 are fully available for you to download and evaluate now from the MySQL Developer site (select Development Release tab). You can learn more about MySQL 5.6 from the documentation  Please don’t hesitate to comment on this or other replication blogs with feedback and questions. Appendix – Detailed Results

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• Sangam 13: Hyderabad, India

  - by mvaughan

  by Teena Singh, Oracle Applications User Experience The AIOUG (All India Oracle User Group) will be hosting Sangam 13 November 8th and 9th in Hyderabad, India. The first Sangam conference was in 2009 and the AppsUX team has been involved with the conference and user group membership since 2011. We are excited to be returning to the conference and meeting Oracle end users there. For the first time at Sangam the AppsUX team will host an Onsite Usability Lab at the conference. If you or one of your team members is attending the conference and interested in attending a pre-scheduled one on one usability session, contact [email protected]. In addition to pre-scheduled sessions in the Onsite Usability Lab, our team will also be hosting Walk In studies.  Whether you have 5 minutes, 15 minutes, or half an hour, you can experience a one on one demo learn more about how user testing is conducted with a UX expert. Additionally, you can learn how you and your company can participate in future design and user research activities. The AppsUX team will also be available at the Oracle booth in the Demo area if you want to ask questions. Finally, you can learn how simplicity, consistency, and emerging trends are driving the applications user experience strategy at Oracle when you attend Thomas Wolfmaier's (Director of SCM User Experience, Oracle) presentation on: Applications User Experiences In the Cloud: Trends and Strategy,  November 8th, 2013. For further information on our team’s involvement in the conference, please refer to the events page on Usable Apps here.

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• What are some good seminar topics that can be used to improve designer&developer communication?

  - by tactoth

  Hello guys the thing I'll tell is what happens in the company I work for but I know it's more like a common issue in software companies. I'm development team leader in a internet service company that provides service that's very similar to dropbox. In our company we have mainly two divisions: the tech division and the designers division, both have their own reporting hierarchy. Designers focus on designing UI and prioritizing features, while developers focus on implement designers' ideas (more like being driven as our big boss has said). Then here comes our issue: the DEV team and DES team communicate very bad. DEV complain DES for these reasons: Too frequent changing of requirements Too complicated interaction (our DEV team has actually learned many HCI principles) Documents for design are incomplete, usually you just get 'design principles' and it's up to DEV to complete design details. When you find design defects, you ask DES team to resolve them, then DES team quickly change the principles and you gonna spend another several weeks because the change is so fundamental. While DES complain DEV for these reasons: Code architecture is not good enough to adapt to changing requirements (Obviously DES knows something about software development) Product design is about principles, not details. DEV fails to realize this. Communication should be quick and should be mainly oral. Trying to make most feature discussion in document for reference is too overloaded and doesn't make sense. As you can see, DEV and DES have different ideas on product design, and encourages very different practice. We have this difference because of the way we work. So our solution is that we should plan some seminars to make each part more aware of the way the other part work. Then my question is, what are some good topics for such seminars? Guessing some people may not think seminars can solve this problem, please also suggest your solution.

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• Leadership Tip&ndash;Vent Up!

  - by D'Arcy Lussier

  Leadership is difficult, for many reasons. One of those reasons is that we not only need to keep ourselves motivated when difficult or challenging times come, but we also need to motivate our teams and keep them focussed on the tasks at hand regardless of the mortars being rained down around them. Inexperienced (and experienced) leaders can fall into the “me-too” mentality – that is, the leader sees themselves as part of the team member instead of the leader of the team. Once a leader changes the teams view that he/she is a peer and not the leader, dynamics can change on the team. One of the biggest dangers is that the leader starts sharing frustrations, fears, concerns, etc. with the team that they’re supposed to be leading on to victory. This can destroy a team’s morale and productivity. One simple thing you can do to counter this is remember this rule when it comes to venting: Vent Up! Don’t vent sideways or down, vent up. Vent to the people above you – they’re the ones that tend to have the power to actually change things anyway. You as a leader stay healthy by getting your frustrations and concerns off your chest, your team is still insulated from it, and your superiors are aware of issues that need to be addressed or can coach you through the obstacles. D

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• Launch configuration for an Eclipse RCP project

  - by ekebsi

  I am new to Eclipse and have been asked to make some changes to an RCP project. Now I can not get it to run. Unfortunately I cannot contact the author to get some help. I would appreciate an hint which could lead to the solution. When I lunch the application I get following log message: !ENTRY org.eclipse.osgi 2 0 2012-11-07 09:03:45.878 !MESSAGE One or more bundles are not resolved because the following root constraints are not resolved: !SUBENTRY 1 org.eclipse.osgi 2 0 2012-11-07 09:03:45.878 !MESSAGE Bundle update@plugins/org.eclipse.team.core.nl1_3.3.0.I20070607.jar was not resolved. !SUBENTRY 2 org.eclipse.team.core.nl1 2 0 2012-11-07 09:03:45.878 !MESSAGE Missing host org.eclipse.team.core_[3.2.0,4.0.0). !SUBENTRY 1 org.eclipse.osgi 2 0 2012-11-07 09:03:45.878 !MESSAGE Bundle update@plugins/org.eclipse.emf.edit.ui.nl1_2.3.0.v200706262000.jar was not resolved. !SUBENTRY 2 org.eclipse.emf.edit.ui.nl1 2 0 2012-11-07 09:03:45.878 !MESSAGE Missing host org.eclipse.emf.edit.ui_[2.0.0,4.0.0). !SUBENTRY 1 org.eclipse.osgi 2 0 2012-11-07 09:03:45.878 !MESSAGE Bundle update@plugins/org.eclipse.team.ui.nl1_3.3.0.I20070607.jar was not resolved. !SUBENTRY 2 org.eclipse.team.ui.nl1 2 0 2012-11-07 09:03:45.878 !MESSAGE Missing host org.eclipse.team.ui_[3.2.0,4.0.0). !SUBENTRY 1 org.eclipse.osgi 2 0 2012-11-07 09:03:45.878 !MESSAGE Bundle update@plugins/org.eclipse.rcp.nl1_3.2.0.v20070612.jar was not resolved. !SUBENTRY 2 org.eclipse.rcp.nl1 2 0 2012-11-07 09:03:45.878 !MESSAGE Missing host org.eclipse.rcp_[3.2.0,4.0.0). !SUBENTRY 1 org.eclipse.osgi 2 0 2012-11-07 09:03:45.878 !MESSAGE Bundle update@plugins/org.eclipse.ui.win32.nl1_3.2.100.I20070319-0010.jar was not resolved. !SUBENTRY 2 org.eclipse.ui.win32.nl1 2 0 2012-11-07 09:03:45.878 !MESSAGE Missing host org.eclipse.ui.win32_[3.2.0,4.0.0). !ENTRY org.eclipse.osgi 2 0 2012-11-07 09:03:45.878 !MESSAGE The following is a complete list of bundles which are not resolved, see the prior log entry for the root cause if it exists: !SUBENTRY 1 org.eclipse.osgi 2 0 2012-11-07 09:03:45.878 !MESSAGE Bundle update@plugins/org.eclipse.emf.edit.ui.nl1_2.3.0.v200706262000.jar [29] was not resolved. !SUBENTRY 2 org.eclipse.emf.edit.ui.nl1 2 0 2012-11-07 09:03:45.878 !MESSAGE Missing host org.eclipse.emf.edit.ui_[2.0.0,4.0.0). !SUBENTRY 1 org.eclipse.osgi 2 0 2012-11-07 09:03:45.878 !MESSAGE Bundle update@plugins/org.eclipse.team.ui.nl1_3.3.0.I20070607.jar [45] was not resolved. !SUBENTRY 2 org.eclipse.team.ui.nl1 2 0 2012-11-07 09:03:45.878 !MESSAGE Missing host org.eclipse.team.ui_[3.2.0,4.0.0). !SUBENTRY 1 org.eclipse.osgi 2 0 2012-11-07 09:03:45.878 !MESSAGE Bundle update@plugins/org.eclipse.ui.win32.nl1_3.2.100.I20070319-0010.jar [66] was not resolved. !SUBENTRY 2 org.eclipse.ui.win32.nl1 2 0 2012-11-07 09:03:45.878 !MESSAGE Missing host org.eclipse.ui.win32_[3.2.0,4.0.0). !SUBENTRY 1 org.eclipse.osgi 2 0 2012-11-07 09:03:45.878 !MESSAGE Bundle update@plugins/org.eclipse.team.core.nl1_3.3.0.I20070607.jar [83] was not resolved. !SUBENTRY 2 org.eclipse.team.core.nl1 2 0 2012-11-07 09:03:45.878 !MESSAGE Missing host org.eclipse.team.core_[3.2.0,4.0.0). !SUBENTRY 1 org.eclipse.osgi 2 0 2012-11-07 09:03:45.878 !MESSAGE Bundle update@plugins/org.eclipse.rcp.nl1_3.2.0.v20070612.jar [124] was not resolved. !SUBENTRY 2 org.eclipse.rcp.nl1 2 0 2012-11-07 09:03:45.878 !MESSAGE Missing host org.eclipse.rcp_[3.2.0,4.0.0). I am using a windows 7 Enterprise 64 (4GB) and Eclipse Juno 64.

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