本系列的全部源代码及二进制文件可以从这里下载:IocInCSharp.rar
本部分示例代码请参考"src\Step4"目录
五、使用Remoting对原有系统进行改造如果使用Remoting技术对HelloGenerator进行改造,使其具有分布式远程访问能力,那么在不使用Ioc技术的情况下,我们将会作出如下调整:
(1)让HelloGenerator继承自MarshalByRefObject类如果要让某个对象具有分布式的功能,必须使其继承自MarshalByRefObject,这样才可以具有远程访问的能力。因此我们需要调整EnHelloGenerator和CnHelloGenerator的代码。这里以EnHelloGenerator为例:
using System;namespace IocInCSharp{ public class EnHelloGenerator : MarshalByRefObject, IHelloGenerator { public string GetHelloString(string name) { return String.Format("Hello, {0}", name); } }}(2)将修改后的HelloGenerator发布出去在这一步中,我们创建了一个新的Console应用程序RemotingServer,并在其中注册了一个Channel,发布服务并进行监听。代码如下:
using System;using System.Configuration;using System.Collections;using System.Runtime.Remoting;using System.Runtime.Remoting.Channels;using System.Runtime.Remoting.Channels.Http;using System.Runtime.Serialization.Formatters;namespace IocInCSharp{ public class Server { public static void Main() { int port = Convert.ToInt32(ConfigurationSettings.AppSettings["LocalServerPort"]); try { BinaryServerFormatterSinkProvider serverProvider = new BinaryServerFormatterSinkProvider(); BinaryClientFormatterSinkProvider clientProvider = new BinaryClientFormatterSinkProvider(); serverProvider.TypeFilterLevel = TypeFilterLevel.Full; IDictionary props = new Hashtable(); props["port"] = port; props["timeout"] = 2000; HttpChannel channel = new HttpChannel(props, clientProvider, serverProvider); ChannelServices.RegisterChannel(channel); RemotingConfiguration.RegisterWellKnownServiceType( typeof(EnHelloGenerator), "HelloGenerator.soap", WellKnownObjectMode.Singleton); Console.WriteLine("Server started!\r\nPress ENTER key to stop the server..."); Console.ReadLine(); } catch { Console.WriteLine("Server Start Error!"); } } }}(3)全新的客户端调用代码为了使得客户端MainApp能够调用到远程的对象,我们需要修改它的代码,注册相应的Channel并进行远程访问。修改后的MainApp代码如下:
using System;using System.Configuration;using System.Collections;using System.Runtime.Remoting;using System.Runtime.Remoting.Channels;using System.Runtime.Remoting.Channels.Http;using System.Runtime.Serialization.Formatters;namespace IocInCSharp{ public class MainApp { public static void Main() { //建立连接 BinaryServerFormatterSinkProvider serverProvider = new BinaryServerFormatterSinkProvider(); BinaryClientFormatterSinkProvider clientProvider = new BinaryClientFormatterSinkProvider(); serverProvider.TypeFilterLevel = TypeFilterLevel.Full; IDictionary props = new Hashtable(); props["port"] = System.Convert.ToInt32(ConfigurationSettings.AppSettings["ClientPort"]); HttpChannel channel = new HttpChannel(props, clientProvider, serverProvider); ChannelServices.RegisterChannel(channel ); //创建远程对象 ISayHello sayHello = new SayHello(); string RemoteServerUrl = ConfigurationSettings.AppSettings["RemoteServerUrl"]; sayHello.HelloGenerator = (IHelloGenerator)Activator.GetObject(typeof(IHelloGenerator), RemoteServerUrl); sayHello.SayHelloTo("zhenyulu"); } }}在这段代码中,远程对象的创建是通过(IHelloGenerator)Activator.GetObject(typeof(IHelloGenerator), RemoteServerUrl)实现的。到此为止,我们就完成了对原有系统的Remoting改造。
经过调整后的系统,其组件间相互依赖关系如下图所示:
注意ICommon.dll文件在Client和Server端都有。
在整个调整过程中,我们修改了Server端的EnHelloGenerator以及CnHelloGenerator的代码,Client端的MainApp也 作了修改,以加入了远程访问机制。那么能不能对原有代码不作任何修改就实现远程访问机制呢?当然可以!不过我们还要请出Sping.net帮助我们实现这一切。
(待续)
本部分示例代码请参考"src\Step4"目录
五、使用Remoting对原有系统进行改造如果使用Remoting技术对HelloGenerator进行改造,使其具有分布式远程访问能力,那么在不使用Ioc技术的情况下,我们将会作出如下调整:
(1)让HelloGenerator继承自MarshalByRefObject类如果要让某个对象具有分布式的功能,必须使其继承自MarshalByRefObject,这样才可以具有远程访问的能力。因此我们需要调整EnHelloGenerator和CnHelloGenerator的代码。这里以EnHelloGenerator为例:
using System;namespace IocInCSharp{ public class EnHelloGenerator : MarshalByRefObject, IHelloGenerator { public string GetHelloString(string name) { return String.Format("Hello, {0}", name); } }}(2)将修改后的HelloGenerator发布出去在这一步中,我们创建了一个新的Console应用程序RemotingServer,并在其中注册了一个Channel,发布服务并进行监听。代码如下:
using System;using System.Configuration;using System.Collections;using System.Runtime.Remoting;using System.Runtime.Remoting.Channels;using System.Runtime.Remoting.Channels.Http;using System.Runtime.Serialization.Formatters;namespace IocInCSharp{ public class Server { public static void Main() { int port = Convert.ToInt32(ConfigurationSettings.AppSettings["LocalServerPort"]); try { BinaryServerFormatterSinkProvider serverProvider = new BinaryServerFormatterSinkProvider(); BinaryClientFormatterSinkProvider clientProvider = new BinaryClientFormatterSinkProvider(); serverProvider.TypeFilterLevel = TypeFilterLevel.Full; IDictionary props = new Hashtable(); props["port"] = port; props["timeout"] = 2000; HttpChannel channel = new HttpChannel(props, clientProvider, serverProvider); ChannelServices.RegisterChannel(channel); RemotingConfiguration.RegisterWellKnownServiceType( typeof(EnHelloGenerator), "HelloGenerator.soap", WellKnownObjectMode.Singleton); Console.WriteLine("Server started!\r\nPress ENTER key to stop the server..."); Console.ReadLine(); } catch { Console.WriteLine("Server Start Error!"); } } }}(3)全新的客户端调用代码为了使得客户端MainApp能够调用到远程的对象,我们需要修改它的代码,注册相应的Channel并进行远程访问。修改后的MainApp代码如下:
using System;using System.Configuration;using System.Collections;using System.Runtime.Remoting;using System.Runtime.Remoting.Channels;using System.Runtime.Remoting.Channels.Http;using System.Runtime.Serialization.Formatters;namespace IocInCSharp{ public class MainApp { public static void Main() { //建立连接 BinaryServerFormatterSinkProvider serverProvider = new BinaryServerFormatterSinkProvider(); BinaryClientFormatterSinkProvider clientProvider = new BinaryClientFormatterSinkProvider(); serverProvider.TypeFilterLevel = TypeFilterLevel.Full; IDictionary props = new Hashtable(); props["port"] = System.Convert.ToInt32(ConfigurationSettings.AppSettings["ClientPort"]); HttpChannel channel = new HttpChannel(props, clientProvider, serverProvider); ChannelServices.RegisterChannel(channel ); //创建远程对象 ISayHello sayHello = new SayHello(); string RemoteServerUrl = ConfigurationSettings.AppSettings["RemoteServerUrl"]; sayHello.HelloGenerator = (IHelloGenerator)Activator.GetObject(typeof(IHelloGenerator), RemoteServerUrl); sayHello.SayHelloTo("zhenyulu"); } }}在这段代码中,远程对象的创建是通过(IHelloGenerator)Activator.GetObject(typeof(IHelloGenerator), RemoteServerUrl)实现的。到此为止,我们就完成了对原有系统的Remoting改造。
经过调整后的系统,其组件间相互依赖关系如下图所示:
注意ICommon.dll文件在Client和Server端都有。
在整个调整过程中,我们修改了Server端的EnHelloGenerator以及CnHelloGenerator的代码,Client端的MainApp也 作了修改,以加入了远程访问机制。那么能不能对原有代码不作任何修改就实现远程访问机制呢?当然可以!不过我们还要请出Sping.net帮助我们实现这一切。
(待续)

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