慢速操作。在RIA服务域服务类 [英] Slow Operations In A RIA Services Domain Service Class

问题描述

市所有，

我使用Silverlight 3与RIA服务。我不知道我应该如何处理在域名服务类较慢的操作？我有一个操作，将采取一两分钟。我得到一个WCF超时一分钟后，当客户端等待来自服务器的响应。

I am using silverlight 3 with RIA services. I was wondering how I should deal with slow operations in a domain services class? I have an operation that will take a couple of minutes. I get a WCF timeout after a minute while the client is waiting for a response from the server.

也许是另一种方法？是能够告诉域服务类来启动的操作，并且然后轮询服务器，每5秒，看它是否已完成。

Another approach perhaps? Is is possible to tell the domain services class to start an operation, and then poll the server every 5 seconds to see if it is finished.

我想实现这一点，我跑进问题是，域名服务类为每个域服务方法我称之为一个新的实例。它是无状态的含义，我不能让域服务启动一个线程我的操作，后来来检查起来就可以了。

I tried implementing this and the problem I ran into is that the domain service class is a new instance for every domain service method I call. It is stateless meaning that I cannot make the domain service start a thread with my operation, and later come and check up on it.

例如。

呼叫从客户端域名服务 - '开始运作（这将启动一个新的线程）

Call domain service from client - 'start operation' (which starts a new thread)

呼叫领域的客户服务 - 在操作完成 - 这不工作，因为我打电话领域服务的新实例

Call domain service from client - 'is operation done' - this doesn't work because I am calling a new instance of the domain service

任何想法？

推荐答案

您可以有你的服务操作返回某种请求标识符，存储在一个静态成员（如字典相关联的请求结果和状态ID）上的您的域名服务。该服务将产生一个线程异步处理此请求（preventing周转超时）。静止构件是由它完成时该线程更新

You could have your service operation return some kind of request identifier, stored in a static member (e.g. a dictionary associating the id with the request result and status) on your domain service. The service would spawn a thread to handle this request asynchronously (preventing the WCF timeout). The static member is updated by the thread when it is finished.

然后，您可以使用该标识符Silverlight的查询。领域服务的新实例将使用静态成员返回的状态和结果。

Then, you can poll from SilverLight using the identifier. New instances of the domain service would use the static member to return the status and result.

这篇关于慢速操作。在RIA服务域服务类的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！