jms Queue 示例 ，服务端向客户端发送消息，并等待客户端返回消息

服务端向queue 发送一条消息， 并等待客户端进行处理，然后接收客户端返回的消息
服务端在向客户端发送消息的时候设置了JMSReplyTo  ,msg.setJMSReplyTo(responseQueue);
然后客户端取得responseQueue  ，并将返回的消息发送到responseQueue，以便服务端进行接收

但是responseQueue  队列里的消息有很多，需要区分哪一条是服务器端想要接收和，于是需要进行消息过滤


 MessageConsumer (QueueReceiver, TopicSubscriber 的你类) 消息处理类有两种处理方式 ，同步或异步
      receive()  同步
         setMessageListener(MessageListener listener)  异步

         server
                      msg.setJMSReplyTo(responseQueue);
                      String filter = "JMSCorrelationID='" + msg.getJMSMessageID() + "'";
                      session.createReceiver(responseQueue, filter);
             client
                         responseMsg.setJMSCorrelationID(msg.getJMSMessageID());
                         Queue responseQueue = (Queue) msgObj.getJMSReplyTo();
                  session.createSender(responseQueue).send(responseMsg);

 

 

jndi.properties

java.naming.factory.initial=org.apache.activemq.jndi.ActiveMQInitialContextFactory connectionFactoryNames = connectionFactory,queueConnectionFactory,topicConnectionFactry,connF queue.requestQueue=jms.queue1 queue.responseQueue=jms.queue2

package org.jixiuf.chat; import javax.jms.JMSException; import javax.jms.MapMessage; import javax.jms.Queue; import javax.jms.QueueConnection; import javax.jms.QueueReceiver; import javax.jms.QueueSender; import javax.jms.QueueSession; import javax.jms.Session; import javax.jms.TextMessage; import org.jixiuf.util.JNDIUtil; public class ChatServer { QueueConnection conn; Queue requestQueue; Queue responseQueue; QueueSession session; int age = 10; public ChatServer() { conn = JNDIUtil.getQueueConnection(); requestQueue = JNDIUtil.lookupQueue("requestQueue"); responseQueue = JNDIUtil.lookupQueue("responseQueue"); try { session = conn.createQueueSession(false, Session.AUTO_ACKNOWLEDGE); conn.start();//一般情况下，如果只是发送消息，而不接收不需要start() ; //但是这个发送消息的服务端需要处理客户端反馈回来的消息，所以start(); } catch (JMSException e) { e.printStackTrace(); } } public void request() { try { MapMessage msg = session.createMapMessage(); msg.setInt("age", (int)(this.age *Math.random()*10)); msg.setJMSReplyTo(responseQueue); // 注意这里，设置replyto 何处，如此，客户端便可将消息发送到responseQueue， // 然后下面可以从responseQueue 接收客户端返回的消息 QueueSender sender = session.createSender(requestQueue); sender.send(msg); // 处理客户端反馈回来的消息 String filter = "JMSCorrelationID='" + msg.getJMSMessageID() + "'"; QueueReceiver receiver = session.createReceiver(responseQueue, filter); TextMessage resMsg = (TextMessage) receiver.receive(20 * 1000); if (resMsg == null) { System.out.print("客户端超时，无法收到客户端返回的消息；"); } else { System.out.println("客户端返回的信息是：" + resMsg.getText()); } } catch (JMSException e) { e.printStackTrace(); } } public void exit() { try { conn.close(); } catch (JMSException e) { e.printStackTrace(); } System.exit(0); } public static void main(String[] args) { ChatServer server = new ChatServer(); server.request(); server.exit(); } } package org.jixiuf.util; import javax.jms.JMSException; import javax.jms.Queue; import javax.jms.QueueConnection; import javax.jms.QueueConnectionFactory; import javax.jms.Session; import javax.naming.InitialContext; import javax.naming.NamingException; public class JNDIUtil { static InitialContext ctx = null; static QueueConnection conn1 = null; static { try { ctx = new InitialContext(); } catch (NamingException e) { e.printStackTrace(); } } public static QueueConnectionFactory lookupQueueConnectionFactory() { QueueConnectionFactory connf = null; try { connf = (QueueConnectionFactory) ctx.lookup("connF"); } catch (NamingException e) { e.printStackTrace(); } return connf; } // 此类维护两个Connection ，一个供server 一个供client ，其实这两个connection 没什么区别， public static QueueConnection getQueueConnection() { if (conn1 == null) { try { conn1 = lookupQueueConnectionFactory().createQueueConnection(); } catch (JMSException e) { e.printStackTrace(); } } return conn1; } public static QueueConnection crateQueueConnection() { try { return lookupQueueConnectionFactory().createQueueConnection(); } catch (JMSException e) { e.printStackTrace(); } return null; } public static Queue lookupQueue(String queueName) { try { return (Queue) ctx.lookup(queueName); } catch (NamingException e) { e.printStackTrace(); } return null; } public static void closeSession(Session session) { try { session.close(); session = null; } catch (JMSException e) { e.printStackTrace(); } } }  package org.jixiuf.chat; import javax.jms.JMSException; import javax.jms.MapMessage; import javax.jms.Message; import javax.jms.MessageListener; import javax.jms.Queue; import javax.jms.QueueConnection; import javax.jms.QueueReceiver; import javax.jms.QueueSession; import javax.jms.Session; import javax.jms.TextMessage; import org.jixiuf.util.JNDIUtil; public class ChatClient implements MessageListener { QueueConnection conn; Queue requestQueue; QueueSession session; public ChatClient() { conn = JNDIUtil.getQueueConnection(); requestQueue = JNDIUtil.lookupQueue("requestQueue"); try { session = conn.createQueueSession(false, Session.AUTO_ACKNOWLEDGE); conn.start(); QueueReceiver receiver = session.createReceiver(requestQueue); receiver.setMessageListener(this); } catch (JMSException e) { e.printStackTrace(); } } @Override public void onMessage(Message msgObj) { System.out.println(msgObj.getClass()); if (!(msgObj instanceof MapMessage)) { return; } MapMessage msg = (MapMessage) msgObj; try { int requestAge = msg.getInt("age"); System.out.println(requestAge); TextMessage responseMsg = session.createTextMessage(); responseMsg.setJMSCorrelationID(msg.getJMSMessageID()); // 这里将responseMsg 的JMSCorrelationID 设成msg.getJMSMessageID , // 因此，服务器端只需要处理responseMsg 中JMSCorrelationID==msg.getJMSMessageID // 的消息 if (requestAge > 50) { responseMsg.setText("年龄大于50 ，不批准修改"); } else { responseMsg.setText("请求通过"); } Queue responseQueue = (Queue) msgObj.getJMSReplyTo(); session.createSender(responseQueue).send(responseMsg); // 将responseMsg // 发送到responseQueue队列中，以便服务器端进行处理 } catch (JMSException e) { e.printStackTrace(); } } public void exit() { try { conn.close(); } catch (JMSException e) { e.printStackTrace(); } System.exit(0); } public static void main(String[] args) throws JMSException { ChatClient client = new ChatClient(); } }

 

过滤

 filter
     
       server
                       String uuid = UUID.randomUUID().toString();
                           msg.setStringProperty("uuid", uuid);
                           String filter = "JMSCorrelationID='" + uuid + "'";
                          QueueReceiver receiver = session.createReceiver(responseQueue, filter);
           client
                       responseMsg.setJMSCorrelationID(msg.getStringProperty("uuid"));