WCF深入学习_并发管理(五)

一.实例说明
(5.Instance mode = Single and Concurrency = Single)实例模式'Single'与并发'Single'。
In this combination only one instance of WCF service instance is created which serves all requests which are sent from all WCF clients. These entire requests are

served using only one thread.

二.代码分析

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;
using System.ServiceModel.Description;
using System.Threading;
namespace ClassLibrary1
{
    [ServiceContract]
    public interface IHelloWorldService
    {
        [OperationContract(IsOneWay = true)]
        void Call(string ClientName);
    }
    [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Single)]
    public class HelloWorldService : IHelloWorldService
    {
        public int i;
        public void Call(string ClientName)
        {
            i++;
            Console.WriteLine("Client name :" + ClientName + " Instance:" + i.ToString() + " Thread:" + Thread.CurrentThread.ManagedThreadId.ToString() + " Time:" + DateTime.Now.ToString() + "\n\n");
            Thread.Sleep(5000);
        }
    }
}

三.运行结果分析
You can see in the below figure approximately one thread is assigned for every WCF client call and only one instance of the WCF service is created.