.Net AOP(二）远程代理Remoting/RealProxy

远程代理

1、使用.Net Remoting/RealProxy

采用TransparentProxy和RealProxy实现对象的代理，实现思路如下：Client -TransparentProxy - RealProxy - Target Object

下面实现自定义的TransparentProxy和RealProxy

using System.Runtime.Remoting.Proxies;
using System.Runtime.Remoting.Messaging;
//RealProxy
public class MyRealProxy<T>:RealProxy
{
private T _target;
public MyRealProxy(T target) : base(typeof(T))
{
this._target = target;
}
public override IMessage Invoke(IMessage msg)
{
PreProceede(msg);
IMethodCallMessage callMessage = (IMethodCallMessage)msg;
object returnValue = callMessage.MethodBase.Invoke(this._target, callMessage.Args);
PostProceede(msg);
return new ReturnMessage(returnValue, new object[0], 0, null, callMessage);
}
public void PreProceede(IMessage msg)
{
Console.WriteLine("方法执行前");
}
public void PostProceede(IMessage msg)
{
Console.WriteLine("方法执行后");
}
}
//TransparentProxy
public static class TransparentProxy
{
public static T Create<T>()
{
T instance = Activator.CreateInstance<T>();
MyRealProxy<T> realProxy = new MyRealProxy<T>(instance);
T transparentProxy = (T)realProxy.GetTransparentProxy();
return transparentProxy;
}
}

用户注册接口和实现

public interface IUserProcessor
{
void RegUser(User user);
}

public class UserProcessor : MarshalByRefObject, IUserProcessor
{
public void RegUser(User user)
{
Console.WriteLine("用户已注册。");
}
}

客户端调用

public class Client
{
public static void Run()
{
try
{
User user = new User() { Name = "lee", PassWord = "123123123123" };
UserProcessor userprocessor = TransparentProxy.Create<UserProcessor>();
userprocessor.RegUser(user);
}
catch (Exception ex)
{
throw ex;
}
}
}

优点：简单实现

缺点：性能差