ejb3.0入门实例

ejb3相对于ejb2开发方便了很多，所有的东西都可以用注解来完成。不用部署描述文件。。。

jboss6/client下所有的jar包，都要放入classpath，把ejb服务端的接口打成jar包放入client，或者把接口java文件copy过来



怎么查看ejb容器的jndi呢？

在jboss启动时，查看控制台

4:05:06,985 INFO  [JBossASKernel]   and supplies:

4:05:06,985 INFO  [JBossASKernel]      jndi:bean12/remote-com.ly.bean.Bean1

4:05:06,985 INFO  [JBossASKernel]      Class:com.ly.bean.Bean1

4:05:06,985 INFO  [JBossASKernel]      Class:com.ly.bean.Bean2

4:05:07,001 INFO  [JBossASKernel]      jndi:bean12/remote-com.ly.bean.Bean2

4:05:07,001 INFO  [JBossASKernel]     
jndi:bean12/remote

4:05:07,001 INFO  [JBossASKernel]      jndi:bean12

ejb服务端主要架构如下

─src

  ├─com

  │  └─ly

  │      ├─bean

  │      │      Bean1.java

  │      │      Bean2.java

  │      │      Bean3.java

  │      │

  │      └─impl

  │              Bean1Impl.java

  │              Bean2Impl.java

  │

  └─META-INF

          MANIFEST.MF

package com.ly.bean;

import javax.ejb.Remote;

@Remote
public interface Bean1 {
public void sayBean1();
}

package com.ly.bean;
import javax.ejb.Remote;

@Remote
public interface Bean2 {
public void sayBean2();
}

package com.ly.bean;
import javax.ejb.Remote;

@Remote
public interface Bean3 {
public void sayBean3();
}

package com.ly.impl;

import javax.ejb.Stateless;

import com.ly.bean.Bean1;
import com.ly.bean.Bean2;
@Stateless(name="bean12")
public class Bean1Impl implements Bean1,Bean2 {

public void sayBean1() {
System.out.println("bean1.........");
}
public void sayBean2() {
System.out.println("bean2.........");
}

}

package com.ly.impl;

import javax.ejb.EJB;
import javax.ejb.Stateless;

import com.ly.bean.Bean1;
import com.ly.bean.Bean2;
import com.ly.bean.Bean3;
@Stateless(name="bean3")
public class Bean2Impl implements Bean3 {
@EJB(beanName="bean12")
Bean1 bean1;
Bean2 bean2;
public void sayBean3() {
bean1.sayBean1();
bean2.sayBean2();
System.out.println("bean3.........");
}
@EJB(mappedName="bean12/remote")
public void setBean2(Bean2 bean2) {
this.bean2 = bean2;
}

}

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
客户端代码如下：

import java.util.Properties;

import javax.naming.Context;
import javax.naming.InitialContext;

import com.ly.bean.Bean3;

/**
* jboss黑屏客户端输出如下
* <br />
* 14:05:09,481 INFO [org.jboss.bootstrap.impl.base.server.AbstractServer
[6.0.0.Final "Neo"] Started in 34s:101ms<br />
14:05:37,717 INFO [STDOUT] bean1.........<br />
14:05:37,733 INFO [STDOUT] bean2.........<br />
14:05:37,733 INFO [STDOUT] bean3.........<br />
* <br />
* @author Administrator
*
*/
public class Client {
public static void main(String args[]) throws Exception{
Properties pro = new Properties();
pro.setProperty("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
pro.setProperty("java.naming.provider.url","localhost:1099");
pro.setProperty("java.naming.factory.url.pkgs","org.jboss.naming");
Context context =new InitialContext(pro);
Bean3 bean=(Bean3) context.lookup("bean3/remote");
bean.sayBean3();//远程服务器执行sayBean3方法

}
}


在jboss启动控制台输出如下
n ajp-127.0.0.1-8009

14:05:09,481 INFO  [org.jboss.bootstrap.impl.base.server.AbstractServer] JBossAS

 [6.0.0.Final "Neo"] Started in 34s:101ms
14:05:37,717 INFO  [STDOUT] bean1.........

14:05:37,733 INFO  [STDOUT] bean2.........

14:05:37,733 INFO  [STDOUT] bean3.........