ejb3学习笔记2（ejb3 helloworld之本地远程调用）

ejb3学习笔记2（ejb3 helloworld之本地远程调用）

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一。改写组件，再次导出jar包，拷贝到deploy目录下

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package cn.wenkun.ejb.service;import javax.ejb.Remote;@Remotepublic interface HelloWorldRemoteService extends HelloWorldService {}package cn.wenkun.ejb.service;import javax.ejb.Stateless;@Statelesspublic class HelloWorldServiceBean implements HelloWorldService,HelloWorldRemoteService{public String sayHello(String str) {System.out.println("hello");return "hello,"+str;}}

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二。本地远程调用

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原理：socket进行进程通信，对象传输用到java的序列化与反序列化

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remote远程调用?

ejb 生成两个代理：stub存根（客户端代理）socket ? ? ? ? skeleton(服务端代理)serversocket

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package cn.service.app;import java.util.Properties;import javax.naming.InitialContext;import javax.naming.NamingException;import cn.wenkun.ejb.service.HelloWorldService;public class EjbApp {public static void main(String[] args) {try {Properties prop = new Properties();prop.put("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");prop.put("java.naming.provider.url", "localhost:1099");\\ejb远程调用端口InitialContext ctx = new InitialContext(prop);HelloWorldService hws = (HelloWorldService) ctx.lookup("HelloWorldServiceBean/remote");String res = hws.sayHello("tom");System.out.println(res);} catch (NamingException e) {e.printStackTrace();}}}