ActiveMQ消息中间件Producer和Consumer
生产者代码:
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package com.java1234.activemq; import javax.jms.Connection; import javax.jms.ConnectionFactory; import javax.jms.Destination; import javax.jms.JMSException; import javax.jms.MessageProducer; import javax.jms.Session; import javax.jms.TextMessage; import org.apache.activemq.ActiveMQConnection; import org.apache.activemq.ActiveMQConnectionFactory; /** * 消息生产者 * @author Administrator * */ public class JMSProducer { private static final String USERNAME=ActiveMQConnection.DEFAULT_USER; // 默认的连接用户名 private static final String PASSWORD=ActiveMQConnection.DEFAULT_PASSWORD; // 默认的连接密码 private static final String BROKEURL=ActiveMQConnection.DEFAULT_BROKER_URL; // 默认的连接地址 private static final int SENDNUM= 10 ; // 发送的消息数量 public static void main(String[] args) { ConnectionFactory connectionFactory; // 连接工厂 Connection connection = null ; // 连接 Session session; // 会话 接受或者发送消息的线程 Destination destination; // 消息的目的地 MessageProducer messageProducer; // 消息生产者 // 实例化连接工厂 connectionFactory= new ActiveMQConnectionFactory(JMSProducer.USERNAME, JMSProducer.PASSWORD, JMSProducer.BROKEURL); try { connection=connectionFactory.createConnection(); // 通过连接工厂获取连接 connection.start(); // 启动连接 session=connection.createSession(Boolean.TRUE, Session.AUTO_ACKNOWLEDGE); // 创建Session destination=session.createQueue( "FirstQueue1" ); // 创建消息队列 messageProducer=session.createProducer(destination); // 创建消息生产者 sendMessage(session, messageProducer); // 发送消息 session.commit(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { if (connection!= null ){ try { connection.close(); } catch (JMSException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } /** * 发送消息 * @param session * @param messageProducer * @throws Exception */ public static void sendMessage(Session session,MessageProducer messageProducer) throws Exception{ for ( int i= 0 ;i<JMSProducer.SENDNUM;i++){ TextMessage message=session.createTextMessage( "ActiveMQ 发送的消息" +i); System.out.println( "发送消息:" + "ActiveMQ 发送的消息" +i); messageProducer.send(message); } } } |
消费者分两种:
1.主动接受消息receive()
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package com.java1234.activemq; import javax.jms.Connection; import javax.jms.ConnectionFactory; import javax.jms.Destination; import javax.jms.JMSException; import javax.jms.MessageConsumer; import javax.jms.Session; import javax.jms.TextMessage; import org.apache.activemq.ActiveMQConnection; import org.apache.activemq.ActiveMQConnectionFactory; /** * 消息消费者 * @author Administrator * */ public class JMSConsumer { private static final String USERNAME=ActiveMQConnection.DEFAULT_USER; // 默认的连接用户名 private static final String PASSWORD=ActiveMQConnection.DEFAULT_PASSWORD; // 默认的连接密码 private static final String BROKEURL=ActiveMQConnection.DEFAULT_BROKER_URL; // 默认的连接地址 public static void main(String[] args) { ConnectionFactory connectionFactory; // 连接工厂 Connection connection = null ; // 连接 Session session; // 会话 接受或者发送消息的线程 Destination destination; // 消息的目的地 MessageConsumer messageConsumer; // 消息的消费者 // 实例化连接工厂 connectionFactory= new ActiveMQConnectionFactory(JMSConsumer.USERNAME, JMSConsumer.PASSWORD, JMSConsumer.BROKEURL); try { connection=connectionFactory.createConnection(); // 通过连接工厂获取连接 connection.start(); // 启动连接 session=connection.createSession(Boolean.FALSE, Session.AUTO_ACKNOWLEDGE); // 创建Session destination=session.createQueue( "FirstQueue1" ); // 创建连接的消息队列 messageConsumer=session.createConsumer(destination); // 创建消息消费者 while ( true ){ TextMessage textMessage=(TextMessage)messageConsumer.receive( 100000 ); if (textMessage!= null ){ System.out.println( "收到的消息:" +textMessage.getText()); } else { break ; } } } catch (JMSException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } |
2.使用listener被动监听消息(非阻塞的)(观察者模式)
Listener代码
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package com.java1234.activemq; import javax.jms.JMSException; import javax.jms.Message; import javax.jms.MessageListener; import javax.jms.TextMessage; /** * 消息监听 * @author Administrator * */ public class Listener implements MessageListener{ @Override public void onMessage(Message message) { // TODO Auto-generated method stub try { System.out.println( "收到的消息:" +((TextMessage)message).getText()); } catch (JMSException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } |
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package com.java1234.activemq; import javax.jms.Connection; import javax.jms.ConnectionFactory; import javax.jms.Destination; import javax.jms.JMSException; import javax.jms.MessageConsumer; import javax.jms.Session; import javax.jms.TextMessage; import org.apache.activemq.ActiveMQConnection; import org.apache.activemq.ActiveMQConnectionFactory; /** * 消息消费者 * @author Administrator * */ public class JMSConsumer2 { private static final String USERNAME=ActiveMQConnection.DEFAULT_USER; // 默认的连接用户名 private static final String PASSWORD=ActiveMQConnection.DEFAULT_PASSWORD; // 默认的连接密码 private static final String BROKEURL=ActiveMQConnection.DEFAULT_BROKER_URL; // 默认的连接地址 public static void main(String[] args) { ConnectionFactory connectionFactory; // 连接工厂 Connection connection = null ; // 连接 Session session; // 会话 接受或者发送消息的线程 Destination destination; // 消息的目的地 MessageConsumer messageConsumer; // 消息的消费者 // 实例化连接工厂 connectionFactory= new ActiveMQConnectionFactory(JMSConsumer2.USERNAME, JMSConsumer2.PASSWORD, JMSConsumer2.BROKEURL); try { connection=connectionFactory.createConnection(); // 通过连接工厂获取连接 connection.start(); // 启动连接 session=connection.createSession(Boolean.FALSE, Session.AUTO_ACKNOWLEDGE); // 创建Session destination=session.createQueue( "FirstQueue1" ); // 创建连接的消息队列 messageConsumer=session.createConsumer(destination); // 创建消息消费者 messageConsumer.setMessageListener( new Listener()); // 注册消息监听 } catch (JMSException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } |
如果想主动的去接受消息,而不用异步消息监听的话,把consumer.setMessageListener(this)改为Message message = consumer.receive(),手动去调用MessageConsumer的receive方法即可。
参考文章: