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JMS调用IBM MQ 监听模式的点对点模式

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JMS调用IBM MQ 监听方式的点对点模式

前面三篇,第一篇讲了安装IBM MQ时遇到的一些问题。第二篇讲了点对点模式的调用。第三篇讲了发布订阅模式。本篇说一下监听模式。

 

监听模式只是在消费者端监听就可以了。对于消息发布者,代码不用做改动。改动的代码用<span>标签标注(代码不能修改颜色?):

package test2;

// SCCSID "@(#) MQMBID sn=p000-L120604 su=_H-IvIK4nEeGko6IWl3MDhA pn=MQJavaSamples/jms/JmsConsumer.java"
/*
 *   <copyright 
 *   notice="lm-source-program" 
 *   pids="5724-H72,5655-R36,5655-L82,5724-L26," 
 *   years="2008,2012" 
 *   crc="39457954" > 
 *  Licensed Materials - Property of IBM  
 *   
 *  5724-H72,5655-R36,5655-L82,5724-L26, 
 *   
 *  (C) Copyright IBM Corp. 2008, 2012 All Rights Reserved.  
 *   
 *  US Government Users Restricted Rights - Use, duplication or  
 *  disclosure restricted by GSA ADP Schedule Contract with  
 *  IBM Corp.  
 *   </copyright> 
 */

import javax.jms.Connection;
import javax.jms.Destination;
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 com.ibm.msg.client.jms.JmsConnectionFactory;
import com.ibm.msg.client.jms.JmsFactoryFactory;
import com.ibm.msg.client.wmq.WMQConstants;

/**
 * A JMS consumer (receiver or subscriber) application that receives a message from the named
 * destination (queue or topic).
 * 
 * Tip: A subscriber application must be started before the publisher application.
 * 
 * Notes:
 * 
 * API type: IBM JMS API (v1.1, unified domain)
 * 
 * Messaging domain: Point-to-point or Publish-Subscribe
 * 
 * Provider type: WebSphere MQ
 * 
 * Connection mode: Client connection
 * 
 * JNDI in use: No
 * 
 * Usage:
 * 
 * JmsConsumer -m queueManagerName -d destinationName [-h host -p port -l channel]
 * 
 * for example:
 * 
 * JmsConsumer -m QM1 -d Q1
 * 
 * JmsConsumer -m QM1 -d topic://foo -h localhost -p 1414
 */
public class JmsConsumer {

  private static String host = "localhost";
  private static int port = 1414;
  private static String channel = "SYSTEM.DEF.SVRCONN";
  private static String queueManagerName = null;
  private static String destinationName = null;
  private static boolean isTopic = true;

  private static int timeout = 15000; // in ms or 15 seconds

  // System exit status value (assume unset value to be 1)
  private static int status = 1;

  /**
   * Main method
   * 
   * @param args
   */
  public static void main(String[] args) {
    // Parse the arguments
	args = new String[]{"-m","QMTest", "-d","testQueue"};
    parseArgs(args);

    // Variables
    Connection connection = null;
    Session session = null;
    Destination destination = null;
    MessageConsumer consumer = null;

    try {
      // Create a connection factory
      JmsFactoryFactory ff = JmsFactoryFactory.getInstance(WMQConstants.WMQ_PROVIDER);
      JmsConnectionFactory cf = ff.createConnectionFactory();

      // Set the properties
      cf.setStringProperty(WMQConstants.WMQ_HOST_NAME, host);
      cf.setIntProperty(WMQConstants.WMQ_PORT, port);
      cf.setStringProperty(WMQConstants.WMQ_CHANNEL, channel);
      cf.setIntProperty(WMQConstants.WMQ_CONNECTION_MODE, WMQConstants.WMQ_CM_CLIENT);
      cf.setStringProperty(WMQConstants.WMQ_QUEUE_MANAGER, queueManagerName);

      // Create JMS objects
      connection = cf.createConnection();
      session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      if (isTopic) {
        destination = session.createTopic(destinationName);
      }
      else {
        destination = session.createQueue(destinationName);
      }
      consumer = session.createConsumer(destination);

      // Start the connection
      connection.start();

      consumer.setMessageListener(new MessageListener(){
          public void onMessage(Message m) {
        	  //如果想收到完整的消息“
        	  System.out.println(m);
        	  //如果想收到消息内容,执行下面的代码
              TextMessage textMsg = (TextMessage) m;
              try {
                  System.out.println(textMsg.getText());
              } catch (JMSException e) {
                  e.printStackTrace();
              }
          }
         
      });



      // And, receive the message
      //在指定的超市时间内接收下一条消息
//      Message message = consumer.receive(timeout);
//      if (message != null) {
//    	  System.err.println("Received message:\n" + message);
////        System.out.println("Received message:\n" + message);
//      }
//      else {
//        System.out.println("No message received!\n");
//        recordFailure(null);
//      }

      recordSuccess();
    }
    catch (JMSException jmsex) {
      recordFailure(jmsex);
    }
    finally {
      if (consumer != null) {
        try {
          consumer.close();
        }
        catch (JMSException jmsex) {
          System.out.println("Consumer could not be closed.");
          recordFailure(jmsex);
        }
      }

      if (session != null) {
        try {
          session.close();
        }
        catch (JMSException jmsex) {
          System.out.println("Session could not be closed.");
          recordFailure(jmsex);
        }
      }

      if (connection != null) {
        try {
          connection.close();
        }
        catch (JMSException jmsex) {
          System.out.println("Connection could not be closed.");
          recordFailure(jmsex);
        }
      }
    }
    System.exit(status);
    return;
  } // end main()

  /**
   * Process a JMSException and any associated inner exceptions.
   * 
   * @param jmsex
   */
  private static void processJMSException(JMSException jmsex) {
    System.out.println(jmsex);
    Throwable innerException = jmsex.getLinkedException();
    if (innerException != null) {
      System.out.println("Inner exception(s):");
    }
    while (innerException != null) {
      System.out.println(innerException);
      innerException = innerException.getCause();
    }
    return;
  }

  /**
   * Record this run as successful.
   */
  private static void recordSuccess() {
    System.out.println("SUCCESS");
    status = 0;
    return;
  }

  /**
   * Record this run as failure.
   * 
   * @param ex
   */
  private static void recordFailure(Exception ex) {
    if (ex != null) {
      if (ex instanceof JMSException) {
        processJMSException((JMSException) ex);
      }
      else {
        System.out.println(ex);
      }
    }
    System.out.println("FAILURE");
    status = -1;
    return;
  }

  /**
   * Parse user supplied arguments.
   * 
   * @param args
   */
  private static void parseArgs(String[] args) {
    try {
      int length = args.length;
      if (length == 0) {
        throw new IllegalArgumentException("No arguments! Mandatory arguments must be specified.");
      }
      if ((length % 2) != 0) {
        throw new IllegalArgumentException("Incorrect number of arguments!");
      }

      int i = 0;

      while (i < length) {
        if ((args[i]).charAt(0) != '-') {
          throw new IllegalArgumentException("Expected a '-' character next: " + args[i]);
        }

        char opt = (args[i]).toLowerCase().charAt(1);

        switch (opt) {
          case 'h' :
            host = args[++i];
            break;
          case 'p' :
            port = Integer.parseInt(args[++i]);
            break;
          case 'l' :
            channel = args[++i];
            break;
          case 'm' :
            queueManagerName = args[++i];
            break;
          case 'd' :
            destinationName = args[++i];
            break;
          default : {
            throw new IllegalArgumentException("Unknown argument: " + opt);
          }
        }

        ++i;
      }

      if (queueManagerName == null) {
        throw new IllegalArgumentException("A queueManager name must be specified.");
      }

      if (destinationName == null) {
        throw new IllegalArgumentException("A destination name must be specified.");
      }

      // Whether the destination is a queue or a topic. Apply a simple check.
      if (destinationName.startsWith("topic://")) {
        isTopic = true;
      }
      else {
        // Otherwise, let's assume it is a queue.
        isTopic = false;
      }
    }
    catch (Exception e) {
      System.out.println(e.getMessage());
      printUsage();
      System.exit(-1);
    }
    return;
  }

  /**
   * Display usage help.
   */
  private static void printUsage() {
    System.out.println("\nUsage:");
    System.out
        .println("JmsConsumer -m queueManagerName -d destinationName [-h host -p port -l channel]");
    return;
  }

} // end class

 

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