多线程服务器

Question

我正在编写一种测试WCF服务器，其方法为添加2个数字并等待可配置的毫秒数。

我已经写了一个WCF客户端。 当我打开此客户端的两个实例时-在clientA上，等待值为50秒，在另一个clientB上，等待值为0秒。 我希望客户端A在运行时（长时间运行），客户端B将立即获得其响应。

但是，它不起作用。 我一直在关注本教程WCF并发

为什么对我不起作用？

WCF服务

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;


namespace WCFService
{
    //[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall,ConcurrencyMode = ConcurrencyMode.Multiple,UseSynchronizationContext = true)]
    //[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall,ConcurrencyMode = ConcurrencyMode.Single)] 
    //[ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple)]
    //[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession,ConcurrencyMode = ConcurrencyMode.Multiple)]
    //[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall, ConcurrencyMode = ConcurrencyMode.Multiple)]
    [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession,ConcurrencyMode = ConcurrencyMode.Multiple)]
    public class WCFJobsLibrary : IWCFJobsLibrary
    {

        public ReturnClass AddNumbers(int FirstNumber, int SecondNumber, int Delay) //Add two numbers and wait a predefined interval
        {
            ReturnClass myReturnClass = new ReturnClass(-1, null, null, 0);
            try
            {             

                myReturnClass.ErrorCode = 1;
                myReturnClass.Result = FirstNumber + SecondNumber;
                System.Threading.Thread.Sleep(Delay); // Wait
                return myReturnClass;

            }
            catch (Exception ex)
            {              
                myReturnClass.ErrorCode = -1;
                myReturnClass.ErrorMessage = ex.ToString();
                return myReturnClass;
            }

        }

    }
}

WCF客户端

try
            {

                radTextBoxResult.Text = ""; // Reset Result
                ServiceReference1.WCFJobsLibraryClient Client = new ServiceReference1.WCFJobsLibraryClient();
                Client.Endpoint.Address = new System.ServiceModel.EndpointAddress(radTextBoxbaseAddress.Text);
                WCFClient.ServiceReference1.ReturnClass AddNumbers_Result;
                AddNumbers_Result = Client.AddNumbers(int.Parse(radTextBoxFirstNumber.Text), int.Parse(radTextBoxSecondNumber.Text), int.Parse(radTextBoxDelay.Text));


                if (AddNumbers_Result.ErrorCode < 0)
                {
                    // If exception happens, it will be returned here
                    MessageBox.Show(AddNumbers_Result.ErrorCode.ToString() + " " + AddNumbers_Result.ErrorMessage + " " + AddNumbers_Result.ExMessage);
                }

                else
                {

                    radTextBoxResult.Text = AddNumbers_Result.Result.ToString();

                }

            }

            catch (Exception ex)
            {

                MessageBox.Show(ex.Message.ToString());

            }

应用配置

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <system.serviceModel>
        <behaviors>
            <serviceBehaviors>
                <behavior name="">
                    <serviceMetadata httpGetEnabled="true" />
                    <serviceDebug includeExceptionDetailInFaults="false" />
                  <serviceThrottling maxConcurrentCalls="16" maxConcurrentInstances="2147483647" maxConcurrentSessions="10" />
                </behavior>
            </serviceBehaviors>
        </behaviors>
        <services>
            <service name="WCFService.WCFJobsLibrary">
                <endpoint address="" binding="wsHttpBinding" contract="WCFService.IWCFJobsLibrary">
                    <identity>
                        <dns value="localhost" />
                    </identity>
                </endpoint>
                <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
                <host>
                    <baseAddresses>
                        <add baseAddress="http://localhost:8732/Design_Time_Addresses/WCFService/WCFJobsLibrary/" />
                    </baseAddresses>
                </host>
            </service>
        </services>
    </system.serviceModel>
</configuration>

Answer 1

问题可能是InstanceContextMode = InstanceContextMode.PerSession设置，因为您的2个调用共享同一会话。 尝试InstanceContextMode = InstanceContextMode.PerCall。

这两个调用都使用您的服务的一个实例，但是如果第一个调用将其停止50秒钟，则第二个调用处理将等待，直到线程恢复正常工作并为第一个调用服务。

Answer 2

问题是我在主线程上的winform应用程序中启动了服务。 您需要在单独的线程上启动WCF，如下所示。

C＃代码

private void radButtonStartWCFService_Click(object sender, EventArgs e)
{
    try
    {
        Thread Trd = new Thread(() => StartWCFServer());
        Trd.IsBackground = true;
        Trd.Start();

        radButtonStartWCFService.Enabled = false;
        radButtonStartWCFService.Text = "WCF Server Started";

    }

    catch(Exception ex)
    {
        MessageBox.Show(ex.Message.ToString());
    }
}


private void StartWCFServer()
{

    try
    {
        sHost = new ServiceHost(typeof(WCFService.WCFJobsLibrary));
        sHost.Open();

    }

    catch (Exception ex)
    {

        MessageBox.Show(ex.Message.ToString());

    }
}