JMS发布订阅（Pub/Sub）模式示例

发布者：

package com.zzj.pubsub;import javax.jms.Connection;import javax.jms.ConnectionFactory;import javax.jms.Message;import javax.jms.MessageProducer;import javax.jms.Session;import javax.jms.Topic;import org.apache.activemq.ActiveMQConnection;import org.apache.activemq.ActiveMQConnectionFactory;public class Producer {private static final String DEST = "com.zzj.dest.02";public static void main(String[] args) throws Exception {ConnectionFactory factory = new ActiveMQConnectionFactory(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, ActiveMQConnection.DEFAULT_BROKER_URL);Connection connection = factory.createConnection();connection.start();Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);Topic topic = session.createTopic(DEST);MessageProducer producer = session.createProducer(topic);Message message = session.createTextMessage("Hello world!");producer.send(message);System.out.println("发送成功！");// 关闭资源producer.close();session.close();connection.close();}}

同步订阅者：

package com.zzj.pubsub;import javax.jms.Connection;import javax.jms.ConnectionFactory;import javax.jms.MessageConsumer;import javax.jms.Session;import javax.jms.TextMessage;import javax.jms.Topic;import org.apache.activemq.ActiveMQConnection;import org.apache.activemq.ActiveMQConnectionFactory;/** * 同步消费 * @author lenovo * */public class SyncCustomer {private static final String DEST = "com.zzj.dest.02";public static void main(String[] args) throws Exception {ConnectionFactory factory = new ActiveMQConnectionFactory(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, ActiveMQConnection.DEFAULT_BROKER_URL);Connection connection = factory.createConnection();connection.start();Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);Topic topic = session.createTopic(DEST);MessageConsumer consumer = session.createConsumer(topic);TextMessage message = (TextMessage) consumer.receive(); // 阻塞方法，直到接收到消息System.out.println(message.getText());// 关闭资源consumer.close();session.close();connection.close();}}

异步订阅者：

package com.zzj.pubsub;import javax.jms.Connection;import javax.jms.ConnectionFactory;import javax.jms.JMSException;import javax.jms.Message;import javax.jms.MessageConsumer;import javax.jms.MessageListener;import javax.jms.Session;import javax.jms.TextMessage;import javax.jms.Topic;import org.apache.activemq.ActiveMQConnection;import org.apache.activemq.ActiveMQConnectionFactory;/** * 异步消费 * @author lenovo * */public class AsynCustomer implements MessageListener{private static final String DEST = "com.zzj.dest.02";private static Connection connection;private static Session session;private static MessageConsumer consumer;public static void main(String[] args) throws Exception {ConnectionFactory factory = new ActiveMQConnectionFactory(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD, ActiveMQConnection.DEFAULT_BROKER_URL);connection = factory.createConnection();connection.start();session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);Topic topic = session.createTopic(DEST);consumer = session.createConsumer(topic);consumer.setMessageListener(new AsynCustomer());}@Overridepublic void onMessage(Message message) {TextMessage tm = (TextMessage) message;try {System.out.println(tm.getText());} catch (JMSException e) {e.printStackTrace();close(); // 关闭资源}}/** * 关闭资源 */private static void close(){try {consumer.close();} catch (JMSException e1) {e1.printStackTrace();}try {session.close();} catch (JMSException e) {e.printStackTrace();}try {connection.close();} catch (JMSException e) {e.printStackTrace();}}}