logbean.java

使用EJB学校编程的好例子

package examples;

import javax.ejb.*;
import javax.jms.*;

/**
 * Sample Message-Driven Bean
 */
public class LogBean implements MessageDrivenBean, MessageListener {

 protected MessageDrivenContext ctx;

 /**
  * Associates this Bean instance with a particular context.
  */
 public void setMessageDrivenContext(MessageDrivenContext ctx) {
  this.ctx = ctx;
 }

 /**
  * Initializes the bean
  */
 public void ejbCreate() {
  System.err.println("ejbCreate()");
 }

 /**
  * Our one business method
  */
 public void onMessage(Message msg) {

  TextMessage tm = (TextMessage) msg;

  try {
   String text = tm.getText();
   System.err.println("Received new message : " + text);
  }
  catch(JMSException e) {
   e.printStackTrace();
  }
 }

 /**
  * Destroys the bean
  */
 public void ejbRemove() {
  System.err.println("ejbRemove()");
 }
}