Wcf + ASP.NET +多线程

Question

我有以下场景：

一个服务什么也不做，只是休眠 WPF 通过 WebRequest 对象指定的时间：

   public class WorkerSvc : IWorkerSvc
   {

    #region IWorkerSvc Members

    public void DoWork(int timeToSleep)
    {
        Trace.WriteLine(DateTime.Now.ToString() + "\tInside Stress Service with TimeToSleep: " + timeToSleep.ToString());

        if (timeToSleep == 0)
            return;

        Thread.Sleep(timeToSleep * 1000);

        Trace.WriteLine(DateTime.Now.ToString() + "\tThe Thread woke up.");

    }

然后是一个调用该服务的 aspx 页面（单独的项目）：

       protected void Page_Load(object sender, EventArgs e)
    {
        System.Diagnostics.Trace.WriteLine(DateTime.Now.ToString() + "  \tInside default stress web site page load;");

        using (WorkerService.WorkerSvcClient client = new StressWebSite.WorkerService.WorkerSvcClient()) 
        {
            System.Diagnostics.Trace.WriteLine(DateTime.Now.ToString() +  "  \tCreated a new client of Stress WCF Service;");

            var rowdata = Request.QueryString["SleepValue"];
            System.Diagnostics.Trace.WriteLine(DateTime.Now.ToString() + " \tDetected Sleep Value in the Request: " + rowdata);

            int realData = 0;

            if (!string.IsNullOrEmpty(rowdata))
            {
                if (int.TryParse(rowdata, out realData))
                {
                    System.Diagnostics.Trace.WriteLine(DateTime.Now.ToString() + " \tBefore Dowork() with SleepValue: " + realData);
                    client.DoWork(realData);
                    System.Diagnostics.Trace.WriteLine(DateTime.Now.ToString() + " \tAfter DoWork() with SleepValue: " +  realData);
                    Response.Write(realData.ToString());
                    //Response.End();
                }

            }

        }
    }         

一个跨多个线程的 WPF 表单，其中本质上将一些数据发布到 aspx 页面：

   private void PerformStress()
    {
        WebRequest request = WebRequest.Create(string.Concat(this.txtStressPageUrl.Text, "?", "SleepValue", "=", this.txtSleepValue.Text));
        Trace.WriteLine("Created Web Request");
        request.Credentials = CredentialCache.DefaultCredentials;

        HttpWebResponse response = (HttpWebResponse)request.GetResponse();
        Stream dataStream = response.GetResponseStream();
        StreamReader reader = new StreamReader(dataStream);

        string responseFromServer = reader.ReadToEnd();
        //return responseFromServer;
    }



    private void button3_Click(object sender, RoutedEventArgs e)
    {
        int stressThreadsCount = 0;

        if (!int.TryParse(this.txtStressThreadCount.Text, out stressThreadsCount))
            MessageBox.Show("Enter number of threads to stress");


        ThreadStart start = delegate()
        {
            DispatcherOperation op = Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(PerformStress));

            DispatcherOperationStatus status = op.Status;

            while (status != DispatcherOperationStatus.Completed)
            {
                status = op.Wait(TimeSpan.FromMilliseconds(1000));
                if (status == DispatcherOperationStatus.Aborted)
                {
                    //
                }
            }


        };

        for (int i = 0; i < stressThreadsCount; i++)
        {
            var t = new Thread(start);
            //this.runningThreads.Add(t);
            t.Start();
            //t.Join();
        }

    }

问题是，尽管我从 WPF 端生成多个线程来发布到 aspx 页面，但所有线程都以串行方式处理，这意味着每个线程都在等待服务返回。

我在 cassiny 下运行这个设置。

我没有将WCF 服务的行为指定为单例。 请帮助识别问题 - 我想模拟对 IIS 的多个请求以及调用 WCF 的页面来证明一个概念。

Answer 1

Singleton 只会影响为服务请求而创建的对象数量。但默认情况下，WCF 服务一次仅处理一个请求。要改变这一点，您应该使用以下内容来装饰您的服务实现

[ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple)]

。有关详细信息，请参阅此处： http://msdn.microsoft.com/en-us/library/system.servicemodel.concurrencymode.aspx