newnotice.java

介绍了j2ee开发常用的学习知识,如servlet,javamail,EJB等知识,并有项目源码.

/*
 * NewNotice.java
 *
 * Created on 2007年11月27日, 下午5:24
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package com.ejb;

import javax.annotation.Resource;
import javax.ejb.ActivationConfigProperty;
import javax.ejb.MessageDriven;
import javax.ejb.MessageDrivenContext;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.ObjectMessage;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

/**
 * 实体类 NewNotice
 * 
 * @author hyl
 */
@MessageDriven(mappedName = "jms/NewNotice", activationConfig =  {
        @ActivationConfigProperty(propertyName = "acknowledgeMode", propertyValue = "Auto-acknowledge"),
        @ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Queue")
    })
public class NewNotice implements MessageListener {

    @PersistenceContext
    private EntityManager em;
    @Resource
    private MessageDrivenContext mdc;
    /** Creates a new instance of NewNotice */
    public NewNotice() {
    }
    public void onMessage(Message message) {
         ObjectMessage msg = null;
    try {
        if (message instanceof ObjectMessage) {
            msg = (ObjectMessage) message;
            Notice e = (Notice) msg.getObject();
            persist(e);
        }
    } catch (JMSException e) {
        e.printStackTrace();
        mdc.setRollbackOnly();
    } catch (Throwable te) {
        te.printStackTrace();
    }
    }
    public void persist(Object object) {
         em.persist(object);
    }
    
}