activemq5.2发送和接收BlobMessage简单实例

最新推荐文章于 2021-07-29 21:59:08 发布

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本文介绍了一种使用ActiveMQ进行Blob消息发送与接收的实现方式。通过创建临时文件并写入数据，演示了如何配置连接工厂及消息生产者来发送Blob消息，并在消费者端将接收到的消息保存为文件。

package com.work.activemq; /** * @author wangmingjie * @date 2009-7-29上午09:00:48 */ import java.io.File; import java.io.IOException; import javax.jms.DeliveryMode; import javax.jms.Destination; import javax.jms.JMSException; import javax.jms.MessageProducer; import javax.jms.Session; import org.apache.activemq.ActiveMQConnection; import org.apache.activemq.ActiveMQConnectionFactory; import org.apache.activemq.ActiveMQSession; import org.apache.activemq.BlobMessage; import org.apache.activemq.command.ActiveMQQueue; public class BlobMessageSendTest { private String user = ActiveMQConnection.DEFAULT_USER; private String password = ActiveMQConnection.DEFAULT_PASSWORD; // private String url = ActiveMQConnection.DEFAULT_BROKER_URL; private String url = "tcp://localhost:61616?jms.blobTransferPolicy.defaultUploadUrl=http://localhost:8161/fileserver/"; private String subject = "Blob Queue"; private Destination destination = null; private ActiveMQConnection connection = null; private ActiveMQSession session = null; private MessageProducer producer = null; // 初始化 private void initialize() throws JMSException, Exception { ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory( url); connection = (ActiveMQConnection)connectionFactory.createConnection(); /* * !!!!!!!!!!!!!!!!!!!!!!!!! very important. If it is set to true * (default) the uploader is lost in translation ;) * !!!!!!!!!!!!!!!!!!!!!!!!! */ connection.setCopyMessageOnSend(false); session = (ActiveMQSession)connection.createSession(false, Session.AUTO_ACKNOWLEDGE); destination = session.createQueue(subject); // destination = session.createTopic(subject); producer = session.createProducer(destination); producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT); } // 发送消息 public void produceMessage(File file) throws JMSException, Exception { initialize(); BlobMessage msg = session.createBlobMessage(file); connection.start(); System.out.println("Producer:->Sending message: " + file.getName()); producer.send(msg); System.out.println("Producer:->Message sent complete!"); } // 关闭连接 public void close() throws JMSException { System.out.println("Producer:->Closing connection"); if (producer != null) producer.close(); if (session != null) session.close(); if (connection != null) connection.close(); } /** * 测试成功，能够发送到服务器上。 * @param args * @throws IOException */ public void send() throws IOException { long start = System.currentTimeMillis(); /* * First you must tell how the Blob repository can be found. Use * ActiveMQ 5.1.0+ as broker because the fileserver webapp works there * out of the box. */ ActiveMQConnectionFactory cf = new ActiveMQConnectionFactory( "tcp://localhost:61616?jms.blobTransferPolicy.defaultUploadUrl=http://localhost:8161/fileserver/"); ActiveMQConnection conn = null; ActiveMQSession session = null; try { conn = (ActiveMQConnection) cf.createConnection(); session = (ActiveMQSession) conn.createSession(false, Session.AUTO_ACKNOWLEDGE); Destination destination = new ActiveMQQueue("Blob Queue"); MessageProducer producer = session.createProducer(destination); /* * !!!!!!!!!!!!!!!!!!!!!!!!! very important. If it is set to true * (default) the uploader is lost in translation ;) * !!!!!!!!!!!!!!!!!!!!!!!!! */ conn.setCopyMessageOnSend(false); // File file = File.createTempFile("amq-data-file-", ".dat"); // // lets write some data // BufferedWriter writer = new BufferedWriter(new FileWriter(file)); // writer.append("Hello World!"); // writer.close(); File file = new File("d:/BUG管理需求和设计.doc"); /* * i have used an simple ascii file instead of the picture you want * to use */ BlobMessage message = session.createBlobMessage(file); /* * should only work if you receive the message */ // System.out.println(message.getInputStream()); producer.send(message); /* * After all you can see a new file under * $Brokerlocation$/webapps/fileserver/ */ } catch (JMSException e) { e.printStackTrace(); } finally { try { if (session != null) { session.close(); } if (conn != null) { conn.close(); } } catch (JMSException ex) { } } System.out.println("共花费了"+(System.currentTimeMillis() - start)+"毫秒！"); } }

package com.work.activemq; import java.io.BufferedInputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; 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 org.apache.activemq.ActiveMQConnection; import org.apache.activemq.ActiveMQConnectionFactory; import org.apache.activemq.ActiveMQSession; import org.apache.activemq.BlobMessage; /** * @author wangmingjie * @date 2009-7-29上午09:05:10 */ public class BlobMessageReceiveTest implements MessageListener { private String user = ActiveMQConnection.DEFAULT_USER; private String password = ActiveMQConnection.DEFAULT_PASSWORD; // private String url = ActiveMQConnection.DEFAULT_BROKER_URL; private String url = "tcp://localhost:61616?jms.blobTransferPolicy.defaultUploadUrl=http://localhost:8161/fileserver/"; private String subject = "Blob Queue"; private Destination destination = null; private ActiveMQConnection connection = null; private ActiveMQSession session = null; private MessageConsumer consumer = null; private static int count = 1; //计数器 // 初始化 private void initialize() throws JMSException, Exception { ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory( url); connection = (ActiveMQConnection)connectionFactory.createConnection(); /* * !!!!!!!!!!!!!!!!!!!!!!!!! very important. If it is set to true * (default) the uploader is lost in translation ;) * !!!!!!!!!!!!!!!!!!!!!!!!! */ connection.setCopyMessageOnSend(false); session = (ActiveMQSession)connection.createSession(false, Session.AUTO_ACKNOWLEDGE); destination = session.createQueue(subject); // destination = session.createTopic(subject); consumer = session.createConsumer(destination); } // 消费消息 public void consumeMessage() throws JMSException, Exception { initialize(); connection.start(); System.out.println("Consumer:->Begin listening..."); // 开始监听 consumer.setMessageListener(this); // Message message = consumer.receive(); } // 关闭连接 public void close() throws JMSException { System.out.println("Consumer:->Closing connection"); if (consumer != null) consumer.close(); if (session != null) session.close(); if (connection != null) connection.close(); } // 消息处理函数 public void onMessage(Message message) { try { if (message instanceof TextMessage) { TextMessage txtMsg = (TextMessage) message; String msg = txtMsg.getText(); System.out.println("Consumer:->Received: " + msg); }else if (message instanceof BlobMessage) { try { InputStream inStr = ((BlobMessage)message).getInputStream(); BufferedInputStream bin = new BufferedInputStream(inStr); File file = new File("c:/new.rar"); FileOutputStream fos = new FileOutputStream(file); byte[] block = new byte[4096];//大小不同，文件就可能损坏。 while (true) { int readLength = bin.read(block); if (readLength == -1) break;// end of file fos.write(block, 0, readLength); //一定要写入实际读取内容 } bin.close(); inStr.close(); fos.flush(); fos.close(); System.out.println("第"+count+++"次Consumer:->Received BlobMessage wangmj "); } catch (IOException e) { e.printStackTrace(); } }else { System.out.println("Consumer:->Received: " + message); } } catch (JMSException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }

package com.work.activemq;

import java.io.File;

/**
* @author wangmingjie
* @date 2009-7-29上午09:21:53
*/
public class BlobMessageClient {

/**
* topic方式，必须先启动消费者，然后是生产者，否则接收不到消息。
* queue方式，最好先启动生产者，然后启动消费者，否则也容易收不到消息。
* @param args
*/
public static void main(String[] args) throws Exception {

  BlobMessageSendTest producer = new BlobMessageSendTest();
  BlobMessageReceiveTest consumer = new BlobMessageReceiveTest();

        String fileName = "e:/javagood/clearbug1.6.zip";
//        String fileName = "d:/JAVA+开发视频会议系统详细设计.doc";
  File file = new File(fileName);
        producer.produceMessage(file);

        producer.close();
        // 延时500毫秒之后停止接受消息
        Thread.sleep(2000);
        // 开始监听
        consumer.consumeMessage();
        // 延时500毫秒之后发送消息
        Thread.sleep(2000);
        consumer.close();
}

}