<>让.NET Remoting更快些-IPCChannel的实现

IPCChannel是.NET Framework 2.0 里面新增的,它使用 Windows 进程间通信 (IPC) 系统在同一计算机上的应用程序域之间传输消息。在同一计算机上的应用程序域之间进行通信时,IPC 信道比 TCP 或 HTTP 信道要快得多。但是IPC只在本机应用之间通信。所以,在客户端和服务端在同一台机器时,我们可以通过注册IPCChannel来提高Remoting的性能。但如果客户端和服务端不在同一台机器时,我们不能注册IPCChannel。

下面让我们来看看如何使用IPCChannel:

首先我们定义一个RemotingObject类:

   
     
using System;

// 远程对象
public class RemoteObject : MarshalByRefObject
{
private int callCount = 0 ;

public int GetCount()
{
Console.WriteLine(
" GetCount has been called. " );
callCount
++ ;
return (callCount);
}
}
接下来我们编写服务端代码:
    
      
using System;
using System.Runtime.Remoting.Channels.Ipc;
using System.Security.Permissions;

public class Server
{
[SecurityPermission(SecurityAction.Demand)]
public static void Main( string [] args)
{
// 创建一个IPC信道
IpcChannel serverChannel = new IpcChannel( " TestChannel " );

// 注册这个IPC信道.
System.Runtime.Remoting.Channels.ChannelServices.RegisterChannel(serverChannel);

// 打印这个信道的名称.
Console.WriteLine( " The name of the channel is {0}. " ,
serverChannel.ChannelName);

// 打印这个信道的优先级.
Console.WriteLine( " The priority of the channel is {0}. " ,
serverChannel.ChannelPriority);

// 打印这个信道的URI数组.
System.Runtime.Remoting.Channels.ChannelDataStore channelData = (System.Runtime.Remoting.Channels.ChannelDataStore) serverChannel.ChannelData;
foreach ( string uri in channelData.ChannelUris)
{
Console.WriteLine(
" The channel URI is {0}. " , uri);
}

// 向信道暴露一个远程对象.
System.Runtime.Remoting.RemotingConfiguration.RegisterWellKnownServiceType( typeof (RemoteObject), " RemoteObject.rem " , System.Runtime.Remoting.WellKnownObjectMode.Singleton);

Console.WriteLine(
" Press ENTER to exit the server. " );
Console.ReadLine();
Console.WriteLine(
" The server is exiting. " );
}
}
 
客户端代码:
    
      
using System;
using System.Runtime.Remoting.Channels.Ipc;
using System.Security.Permissions;

public class Client
{
[SecurityPermission(SecurityAction.Demand)]
public static void Main( string [] args)
{
// 创建一个IPC信道。
IpcChannel channel = new IpcChannel();

// 注册这个信道。
System.Runtime.Remoting.Channels.ChannelServices.RegisterChannel(channel);

// 注册一个远程对象的客户端代理.
System.Runtime.Remoting.WellKnownClientTypeEntry remoteType = new System.Runtime.Remoting.WellKnownClientTypeEntry( typeof (RemoteObject), " ipc://TestChannel/RemoteObject.rem " );
System.Runtime.Remoting.RemotingConfiguration.RegisterWellKnownClientType(remoteType);

RemoteObject service
= new RemoteObject();

Console.WriteLine(
" The client is invoking the remote object. " );
Console.WriteLine(
" The remote object has been called {0} times. " ,
service.GetCount());
}
}

 主要代码就算完成了。但,还有一个问题,那就是如果服务端和客户端在不同的Windows帐户运行的时候,会有验证权限的问题。对于这个问题,我们只要把服务端的信道注册代码改一下就好了:

  
    
Hashtable ht = new Hashtable();
ht[
" portName " ] = " TestChannel " ;
ht[
" name " ] = " ipc " ;
ht[
" authorizedGroup " ] = " Everyone " ;
serverChannel
= new IpcChannel(ht, null , provider);

本文出处:http://blog.csdn.net/wzd24/archive/2007/10/12/1821382.aspx

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