Question

WCF实例模式如何与WCF中的inactivityTimeout相关？假设我在web.config中有这个绑定：

<wsHttpBinding>
 <binding name="WSHttpBinding" receiveTimeout="infinite">
   <reliableSession inactivityTimeout="infinite" enabled="true" />
 </binding>
</wsHttpBinding>

WCF实例模式PerCall，PerSession，Single如何与此超时相关？假设我将我的服务归因于PerCall，这个inactivityTimeout仅在我进行服务调用的时间段内有效，并关闭连接还是会“永久”保持打开状态？

Answer 1

我发现下面的测试对于调查您的问题非常有用。总之，似乎服务的实例模式对于不活动超时没有任何影响。不活动超时涉及在服务器拒绝来自它的任何请求之前，底层通道处于非活动状态的时间。

[TestClass]
public class Timeouts
{
    [TestMethod]
    public void Test()
    {
        Task.Factory.StartNew(() =>
        {
            var serverBinding = new NetTcpBinding();
            serverBinding.ReliableSession.Enabled = true;
            serverBinding.ReliableSession.InactivityTimeout = TimeSpan.FromSeconds(4);
            var host = new ServiceHost(typeof (MyService));
            host.AddServiceEndpoint(typeof (IMyService), serverBinding, "net.tcp://localhost:1234/service");
            host.Open();
        }).Wait();

        var clientBinding = new NetTcpBinding();
        clientBinding.ReliableSession.Enabled = true;

        var channelFactory = new ChannelFactory<IMyService>(clientBinding, "net.tcp://localhost:1234/service");

        var channelOne = channelFactory.CreateChannel();

        channelOne.MyMethod();
        Thread.Sleep(TimeSpan.FromSeconds(3));
        channelOne.MyMethod();

        (channelOne as ICommunicationObject).Close();

        Thread.Sleep(TimeSpan.FromSeconds(5));

        var channelTwo = channelFactory.CreateChannel();

        channelTwo.MyMethod();
        Thread.Sleep(TimeSpan.FromSeconds(6));
        channelTwo.MyMethod();

        (channelTwo as ICommunicationObject).Close();
    }

    [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall)]
    public class MyService : IMyService
    {
        public void MyMethod()
        {
            Console.WriteLine("Hash: " + GetHashCode());
            Console.WriteLine("Session: " + OperationContext.Current.SessionId);
            Console.WriteLine();
        }
    }

    [ServiceContract]
    public interface IMyService
    {
        [OperationContract]
        void MyMethod();
    }
}

我认为这只是强调了始终将客户端关闭到WCF代理的重要性。如果您没有关闭代理服务器，并且不活动超时为“无限”，则在完成代理服务器后，您最终可能会在服务器上使用资源。

WCF实例模式和inactivityTimeout

1 个答案: