wcf服务契约代理链

Posted 2020-10-04 听哥哥的话

意图：为了是客户端代理呈现出面向对象的多态的特征
a. 服务端
1.契约 实现了契约的继承这个在服务端是一点问题没有，因为oprationcontract可以继承，虽然DataContract不能实现继承，注意IAnimal和IDog都是契约，但是我们通常喜欢用最
具体的那个契约来发布服务，因为他最丰富
using System;
using System.ServiceModel;

namespace WCF.Chapter2.InheritanceProxyChaining.Host
{
    [ServiceContract]
    public interface IAnimal
    {
        [OperationContract]
        string AnimalSay();
    }

    [ServiceContract]
    public interface IDog : IAnimal
    {
        [OperationContract]
        string DogSay();
    }
}

2.服务的实现
using System;
using System.ServiceModel;

namespace WCF.Chapter2.InheritanceProxyChaining.Host
{
    public class Service : IDog
    {
        public string AnimalSay()
        {
            return "动物会叫会走路...";
        }

        public string DogSay()
        {
            return "小狗汪汪叫...";
        }
    }
}

3.服务寄宿
using System;
using System.ServiceModel;

namespace WCF.Chapter2.InheritanceProxyChaining.Host
{
    class Program
    {
        static void Main(string[] args)
        {
            using (ServiceHost host = new ServiceHost(typeof(Service)))
            {
                host.Opened += delegate
                {
                    Console.WriteLine("服务已开启...");
                };
                host.Open();

                Console.ReadLine();
            }

            Console.WriteLine("服务已关闭...");
            Console.ReadLine();
        }
    }
}

4.终结点配置 契约使用IDog的契约来发布服务
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior name="MEX">
          <serviceMetadata httpGetEnabled="true"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    
    <services>      
      <service name="WCF.Chapter2.InheritanceProxyChaining.Host.Service" behaviorConfiguration="MEX">
        <host>
          <baseAddresses>
            <add baseAddress="http://loacalhost:8000/"/>
          </baseAddresses>
        </host>
        
        <endpoint address="http://localhost:8001/Dog" binding="basicHttpBinding" contract="WCF.Chapter2.InheritanceProxyChaining.Host.IDog"></endpoint>
      </service>
    </services>
  </system.serviceModel>
</configuration>
b. 客户端
1.契约继承 只有命名空间不一样而已
using System;
using System.ServiceModel;

namespace WCF.Chapter2.InheritanceProxyChaining.Client
{
    [ServiceContract]
    public interface IAnimal
    {
        [OperationContract]
        string AnimalSay();
    }

    [ServiceContract]
    public interface IDog : IAnimal
    {
        [OperationContract]
        string DogSay();
    }
}
2. 客户端代理链的实现
using System;
using System.ServiceModel;

namespace WCF.Chapter2.InheritanceProxyChaining.Client
{
   //clientbase<T> T使用最具体的接口
    public class AnimalClientProxy : ClientBase<IDog>, IAnimal
    {
        public string AnimalSay()
        {
            return base.Channel.AnimalSay();
        }
    }
   //代理链继承上一级代理实现
    public class DogClientProxy : AnimalClientProxy, IDog
    {
        public string DogSay()
        {
            return base.Channel.DogSay();
        }
    }
}
3. 本地调用最终呈现出了面向对象的多态，本地化之后就是CLR的内容了，能实现面向对象的特性也是正常的
using System;
using System.ServiceModel;

namespace WCF.Chapter2.InheritanceProxyChaining.Client
{
    class Program
    {
        static void Main(string[] args)
        {
            using (AnimalClientProxy animalProxy = new AnimalClientProxy())
            {
                Console.WriteLine(animalProxy.AnimalSay());
                Console.WriteLine();
            }

            using (AnimalClientProxy animalProxy1 = new DogClientProxy())
            {
                Console.WriteLine(animalProxy1.AnimalSay());
                Console.WriteLine();
            }

            using (DogClientProxy dogProxy = new DogClientProxy())
            {
                Console.WriteLine(dogProxy.AnimalSay());
                Console.WriteLine(dogProxy.DogSay());
                Console.WriteLine();
            }

            Console.ReadLine();
        }
    }
}


4.客户端终结点 用的也是最具体的契约
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior name="MEX">
          <serviceMetadata httpGetEnabled="true"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    
    <services>      
      <service name="WCF.Chapter2.InheritanceProxyChaining.Host.Service" behaviorConfiguration="MEX">
        <host>
          <baseAddresses>
            <add baseAddress="http://loacalhost:8000/"/>
          </baseAddresses>
        </host>
        
        <endpoint address="http://localhost:8001/Dog" binding="basicHttpBinding" contract="WCF.Chapter2.InheritanceProxyChaining.Host.IDog"></endpoint>
      </service>
    </services>
  </system.serviceModel>
</configuration>