.Net AOP(二）远程代理Remoting/RealProxy

骑猪看日落 2022-09-24 05:17 19阅读 0赞

**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

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1.  **using** System.Runtime.Remoting.Proxies;  
2.  **using** System.Runtime.Remoting.Messaging;  
3.      //RealProxy  
4.      **public** **class** MyRealProxy<T>:RealProxy  
5.      \{  
6.          **private** T \_target;  
7.          **public** MyRealProxy(T target) : **base**(**typeof**(T))  
8.          \{  
9.              **this**.\_target = target;  
10.         \}  
11.        **public** **override** IMessage Invoke(IMessage msg)  
12.        \{  
13.             PreProceede(msg);  
14.             IMethodCallMessage callMessage = (IMethodCallMessage)msg;  
15.             **object** returnValue = callMessage.MethodBase.Invoke(**this**.\_target, callMessage.Args);  
16.             PostProceede(msg);  
17.             **return** **new** ReturnMessage(returnValue, **new** **object**\[0\], 0, **null**, callMessage);  
18.         \}  
19.        **public** **void** PreProceede(IMessage msg)  
20.        \{  
21.            Console.WriteLine("方法执行前");  
22.        \}  
23.        **public** **void** PostProceede(IMessage msg)  
24.        \{  
25.            Console.WriteLine("方法执行后");  
26.        \}  
27.     \}  
28.    //TransparentProxy  
29.    **public** **static** **class** TransparentProxy  
30.    \{  
31.         **public** **static** T Create<T>()  
32.         \{  
33.            T instance = Activator.CreateInstance<T>();  
34.            MyRealProxy<T> realProxy = **new** MyRealProxy<T>(instance);  
35.            T transparentProxy = (T)realProxy.GetTransparentProxy();  
36.            **return** transparentProxy;  
37.         \}  
38.    \}

用户注册接口和实现

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1.  **public** **interface** IUserProcessor  
2.      \{  
3.          **void** RegUser(User user);  
4.      \}  
5.    
6.      **public** **class** UserProcessor : MarshalByRefObject, IUserProcessor  
7.      \{  
8.          **public** **void** RegUser(User user)  
9.          \{  
10.             Console.WriteLine("用户已注册。");  
11.         \}  
12.     \}

客户端调用

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1.  public class Client  
2.      \{  
3.          public static void Run()  
4.          \{  
5.              try  
6.              \{  
7.                  User user = new User() \{ Name = "lee", PassWord = "123123123123" \};  
8.                  UserProcessor userprocessor = TransparentProxy.Create**<****UserProcessor****>**();  
9.                  userprocessor.RegUser(user);  
10.             \}  
11.             catch (Exception ex)  
12.             \{  
13.                 throw ex;  
14.             \}  
15.         \}  
16.     \}

优点：简单实现

缺点：性能差

[view plain]: http://blog.csdn.net/liming850628/article/details/50990608#
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