ActiveMQ基础10：小总结 - 异步发邮件系统

需求：A系统调用邮件服务，B系统提供邮件服务并发送邮件

核心代码：

consumer监听器（监听activemq）

package com.ideap.listener;

import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.ObjectMessage;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.ideap.pojo.MailContent;
import com.ideap.service.MailService;

/**
 * 编写监听器，专门处理消息
 * @author Administrator
 *
 */
@Component(value = "myListener")
public class MyMessageListener implements MessageListener{
	
	@Autowired
	private MailService mailServiceImpl;

	@Override
	public void onMessage(Message message) {
		try {
			if(message instanceof ObjectMessage){
				ObjectMessage om = (ObjectMessage)message;
				Object data = om.getObject();
				if(data instanceof MailContent){
					MailContent mailContent = (MailContent)data;
					this.mailServiceImpl.sendMail(mailContent);;
				}
			} else {
				System.out.println(message);
			}
		} catch (JMSException e) {
			e.printStackTrace();
		}
	}

}

consumer 发送邮件（javaMail)

package com.ideap.service.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.stereotype.Service;

import com.ideap.pojo.MailContent;
import com.ideap.service.MailService;

@Service
public class MailContentImpl implements MailService{

	@Autowired
	private JavaMailSender sender;
	@Autowired
	private SimpleMailMessage mailMessage;
	@Autowired
	private ThreadPoolTaskExecutor pool;
	
	@Override
	public void sendMail(final MailContent mail) {
		this.pool.execute(new Runnable() {
			
			@Override
			public void run() {
				mailMessage.setTo(mail.getTo());
				mailMessage.setSubject(mail.getSubject());
				mailMessage.setText(mail.getContent());
				sender.send(mailMessage);
			}
		});
	}

}

producer 包装邮件信息，发送消息

package com.ideap.service.impl;

import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.Session;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.jms.core.MessageCreator;
import org.springframework.stereotype.Service;

import com.ideap.pojo.MailContent;
import com.ideap.service.MessageService;

@Service
public class MessageServiceImpl implements MessageService{

	@Autowired
	private JmsTemplate template;
	
	/**
	 * 发送消息到ActiveMQ中
	 * 1、需要连接（connection）对象，会话（session）对象，消息发送器（producer）对象
	 * 2、发送消息
	 * 使用spring整合JMS相关代码时，不需要定义连接，会话等资源对象。
	 * 使用spring提供的JMSTemplate对象实现访问
	 * JMSTemplate - 是spring封装的一个，专门访问MOM容器的模板对象，其中定义若干方法，实现消息的发送和接收
	 * 
	 */
	@Override
	public void sendMessage(String from, String to, String subject, String content) {
		if(to.indexOf(";") > -1){
			String[] tos = to.split(";");
			for(String t : tos){
				if(null == t && "".equals(t.trim())){
					continue;
				}
				final MailContent mail= this.transfer2Mail(from, t, subject, content);
				this.sendMail(mail);
			}
		} else {
			final MailContent mail= this.transfer2Mail(from, to, subject, content);
			this.sendMail(mail);
		}
	}
	
	private MailContent transfer2Mail(String from, String to, String subject, String content){
		MailContent mail = new MailContent();
		mail.setFrom(from);
		mail.setTo(to);
		mail.setSubject(subject);
		mail.setContent(content);
		return mail;
	}

	private void sendMail(final MailContent mail){
		template.send(new MessageCreator() {
			/**
			 * 创建一个要发送的消息对象
			 * 并返回这个消息的对象
			 * template自动将消息对象发送到MOM容器中
			 */
			@Override
			public Message createMessage(Session session) throws JMSException {
				Message message = session.createObjectMessage(mail);
				return message;
			}
		});
	}
}

整体代码上传到gitHub上，down下来，输入自己的发送邮箱，就可以畅跑了

github.com/chaixf86/pr…

发邮件邮箱

有问题可留言一起交流