dispatcher

I have a very bad feeling about using lock in my code but now the Dispatcher of WindowBase exists and I want to use it everywhere. For example I use a multi thread singleton WCF service who publish events on the EventAggregator of PRISM, the payload is immutable (it is just data) and every thread with a dispatcher can retrieve the event gracefully, whitout deadlock in their own dispatcher. (Not only UI thread, but also threads with database calls, threads with services call, threads which log or other threads with slow calls, because I don't want to freeze the UI). But my problem is that this

I want to forward a request from Servlet to Action like this using RequestDispacher like this RequestDispatcher dispatcher=request.getRequestDispatcher("hello.action"); dispatcher.include(request, response); It's not working. How can I resolve this problem? In order to do this you may also need to set the filter to run on FORWARD (and INCLUDE as your code shows, although you state you want a FORWARD): <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> <dispatcher>REQUEST</dispatcher> <dispatcher>FORWARD</dispatcher> <dispatcher>INCLUDE</dispatcher> <!-- If you

I'm trying to call System.Windows.Threading.Dispatcher.BeginInvoke . The signature of the method is this: BeginInvoke(Delegate method, params object[] args) I'm trying to pass it a Lambda instead of having to create a Delegate. _dispatcher.BeginInvoke((sender) => { DoSomething(); }, new object[] { this } ); It's giving me a compiler error saying that I can't convert the lambda to a System.Delegate. The signature of the delegate takes an object as a parameter and returns void. My lambda matches this, yet it's not working. What am I missing? Reed Copsey Since the method takes a System.Delegate ,

在学习Reactor模式之前，我们需要对“I/O的四种模型”以及“什么是I/O多路复用”进行简单的介绍，因为Reactor是一个使用了同步非阻塞的I/O多路复用机制的模式。 I/O的四种模型 I/0 操作 主要分成两部分 ① 数据准备，将数据加载到内核缓存 ② 将内核缓存中的数据加载到用户缓存 Synchronous blocking I/O Typical flow of the synchronous blocking I/O model Synchronous non-blocking I/0 Typical flow of the synchronous non-blocking I/O model Asynchronous blocking I/0 Typical flow of the asynchronous blocking I/O model (select) Asynchronous non-blocking I/0 Typical flow of the asynchronous non-blocking I/O model 堵塞、非堵塞的区别是在于第一阶段，即数据准备阶段。无论是堵塞还是非堵塞，都是用应用主动找内核要数据，而read数据的过程是‘堵塞’的，直到数据读取完。 同步、异步的区别在于第二阶段，若由请求者主动的去获取数据，则为同步操作，需要说明的是

I have a WPF application in which a thread checks some value. In certain cases, I show a pop-up Window in order to display a message. When I create this pop-up window in the thread, an exception is thrown by the pop-up window's constructor: "The calling thread must be STA, because many UI components require this." How do I resolve this error? This is my code for creating the pop-up window: // using System.Threading; // using System.Windows.Threading; Thread Messagethread = new Thread(new ThreadStart(delegate() { DispatcherOperation DispacherOP = frmMassenger.Dispatcher.BeginInvoke(

Is there any way to get the UI thread's Dispatcher when you have no reference to any UI elements? You can grab the UI Dispatcher from the static application instance: Application.Current.Dispatcher You may want to check Application.Current for null first, as it can be cleared during a shutdown sequence. M Townsend The following works much better for me when being used in a WinForms application that happens to be also using WPF (in my case Esri's Arcmap.exe) private System.Windows.Threading.Dispatcher Dispatcher { get; set; } // I put this in my view model constructor as it MUST be called from