.Net對(duì)于遠(yuǎn)程調(diào)用提供了兩種方法:Remoting和WebService。
WebService現(xiàn)在是如火如荼,特別是有一種比較流行的架構(gòu):Winform+WebService(Java、.Net),
我曾經(jīng)做過的一個(gè)項(xiàng)目就是這樣子的,分布式、跨平臺(tái)、極佳的用戶體驗(yàn),這三者結(jié)合起來(lái)是不是很誘人?
不過,這里我只說(shuō)Remoting,Remoting具有以下特點(diǎn):
1、Tcp通道的Remoting速度非???br>2、雖然是遠(yuǎn)程的,但是非常接近于本地調(diào)用對(duì)象
3、可以做到保持對(duì)象的狀態(tài)
4、沒有應(yīng)用程序限制,可以是控制臺(tái),winform,iis,windows服務(wù)承載遠(yuǎn)程對(duì)象
缺點(diǎn):
1、不是標(biāo)準(zhǔn)的應(yīng)用,因此有平臺(tái)限制
2、脫離iis的話需要有自己的安全機(jī)制
可以看出來(lái),比起WebService,Remoting更適合于中小型局域網(wǎng)應(yīng)用,而不適用于企業(yè)級(jí)的應(yīng)用。
下面給出一個(gè)極其簡(jiǎn)單的Sample:
Remoting用的對(duì)象: 1namespace RemoteSample
2{
3 public class RemoteObject : System.MarshalByRefObject
4 {
5 public RemoteObject()
6 {
7 System.Console.WriteLine("New Referance Added!");
8 }
9
10 public int sum(int a, int b)
11 {
12 return a + b;
13 }
14 }
15} 將其編譯為一個(gè)lib文件:csc /t:library RemoteObject.csServer端:
1using System;
2using System.Runtime;
3using System.Runtime.Remoting;
4using System.Runtime.Remoting.Channels;
5using System.Runtime.Remoting.Channels.Tcp;
6using RemoteSample;
7
8namespace RemoteSampleServer
9{
10 public class RemoteServer
11 {
12 public static void Main(String[] args)
13 {
14 TcpServerChannel channel = new TcpServerChannel(6666);
15 ChannelServices.RegisterChannel(channel);
16 RemotingConfiguration.RegisterWellKnownServiceType(typeof(RemoteObject),
17 "RemoteObject", WellKnownObjectMode.SingleCall);
18 System.Console.WriteLine("Press Any Key");
19 System.Console.ReadLine();
20 }
21 }
22} 將其編譯為一個(gè)exe文件:
csc /r:System.Runtime.Remoting.dll /r:RemoteObject.dll RemoteServer.csClient端:
1using System;
2using System.Runtime.Remoting;
3using System.Runtime.Remoting.Channels;
4using System.Runtime.Remoting.Channels.Tcp;
5using RemoteSample;
6
7namespace RemoteSampleClient
8{
9 public class RemoteClient
10 {
11 public static void Main(string[] args)
12 {
13 ChannelServices.RegisterChannel(new TcpClientChannel());
14 RemoteObject remoteobj = (RemoteObject)Activator.GetObject(typeof(RemoteObject),
15 "tcp://localhost:6666/RemoteObject");
16 Console.WriteLine("1 + 2 = " + remoteobj.sum(1,2).ToString());
17 Console.ReadLine();
18 }
19 }
20} 同樣的,將其編譯為exe文件:
csc /r:System.Runtime.Remoting.dll /r:RemoteObject.dll RemoteClient.cs好了,一次運(yùn)行生成的
RemoteServer.exe和RemoteClient.exe,你就會(huì)發(fā)現(xiàn)原來(lái)Remoting是這樣簡(jiǎn)單。