java-rabbitmq-官网实例02

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java-rabbitmq-官网实例02

描述：
1.定义持久化队列，发送持久化消息，消息接受者需要手动应答，MQ才会删除队列中的消息
2.使用 channel.basicQos() 设置多个消费者时，消息将平均分发

运行：
D2_NewTask.main(); //生产者
D2_Worker.main(); //消费者

package com.example.tutorials;import com.rabbitmq.client.Channel;import com.rabbitmq.client.Connection;import com.rabbitmq.client.ConnectionFactory;import com.rabbitmq.client.MessageProperties;import java.util.Scanner;/** * 1.定义持久化队列，发送持久化消息，消息接受者需要手动应答，MQ才会删除队列中的消息 * 2.使用 channel.basicQos() 设置多个消费者时，消息将平均分发 * @create 2017-08-29 * amqp-client 4.2.0 **/public class D2_NewTask {    private static final String TASK_QUEUE_NAME = "task_queue";    /**     * 生产者， Work queues     * @param argv     * @throws Exception     */    public static void main(String[] argv) throws Exception {        ConnectionFactory factory = new ConnectionFactory();        //设置登录账号        factory.setHost(ServerInfo.host);        factory.setPort(ServerInfo.port);        factory.setUsername(ServerInfo.uName);        factory.setPassword(ServerInfo.uPwd);        //链接服务器        Connection connection = factory.newConnection();        Channel channel = connection.createChannel();        //定义一个队列        boolean duiable=true;//队列持久化        boolean exclusive = false;//排他队列        boolean autoDelete=false;//没有consumer时，队列是否自动删除        channel.queueDeclare(TASK_QUEUE_NAME, duiable, exclusive, autoDelete, null);        //发送消息        System.out.println("输入要发送的消息，退出输入 x ");        String message = "";        do{            Scanner scanner = new Scanner(System.in);            message = scanner.next();            channel.basicPublish("", TASK_QUEUE_NAME,                    MessageProperties.PERSISTENT_TEXT_PLAIN,//设置消息持久化                    message.getBytes("UTF-8"));            System.out.println(" [x] Sent '" + message + "'");        }while(!"x".equals(message));        channel.close();        connection.close();    }}

package com.example.tutorials;import com.rabbitmq.client.*;import java.io.IOException;/** * 1.定义持久化队列，发送持久化消息，消息接受者需要手动应答，MQ才会删除队列中的消息 * 2.使用 channel.basicQos() 设置多个消费者时，消息将平均分发 * @create 2017-08-29 * amqp-client 4.2.0 **/public class D2_Worker {    private static final String TASK_QUEUE_NAME = "task_queue";    /**     * 消费者， Work queues     * @param argv     * @throws Exception     */    public static void main(String[] argv) {        //多个消费者，指定了相同名称的队列，向队列发送消失时，消息将推送给随机一个消费者消费。可以 调用channel.basicQos(1) 设置后，消息将以轮询的形式推送到每个消费者        //启动两个线程，模拟消费者        new Thread(new Runnable() {            @Override            public void run() {                try {                    startConsumer("consumer_01");                } catch (Exception e) {                    e.printStackTrace();                }            }        }).start();        new Thread(new Runnable() {            @Override            public void run() {                try {                    startConsumer("consumer_02");                } catch (Exception e) {                    e.printStackTrace();                }            }        }).start();    }    /**     * 启动一个消费者     * @param consumerName     * @throws Exception     */    public static void startConsumer(final String consumerName) throws Exception {        ConnectionFactory factory = new ConnectionFactory();        //设置登录账号        factory.setHost(ServerInfo.host);        factory.setPort(ServerInfo.port);        factory.setUsername(ServerInfo.uName);        factory.setPassword(ServerInfo.uPwd);        //链接服务器        final Connection connection = factory.newConnection();        final Channel channel = connection.createChannel();        //定义一个队列        boolean duiable=true;//持久化        boolean exclusive = false;//排他队列        boolean autoDelete=false;//没有consumer时，队列是否自动删除        channel.queueDeclare(TASK_QUEUE_NAME, duiable, exclusive, autoDelete, null);        System.out.println(" [*] Waiting for messages. To exit press CTRL+C");        //平均分发消息，有多个消费者时，消息将以轮询方式接收到消息        channel.basicQos(1);        final Consumer consumer = new DefaultConsumer(channel) {            @Override            public void handleConsumeOk(String consumerTag) {                super.handleConsumeOk(consumerTag);                System.out.println(" ["+consumerName+"] 已经注册成功！ ");                System.out.println("----------------------------------------------");            }            @Override            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {                String message = new String(body, "UTF-8");                System.out.println("----------------------------------------------");                System.out.println(" ["+consumerName+"] Received '" + message + "'");                try {                    doWork(message);//消费消息                } finally {                    System.out.println(" ["+consumerName+"] Done");                    //手动发送应答，使消息在队列中被删除                    channel.basicAck(envelope.getDeliveryTag(), false);                }            }        };        //启动消费者，接收消息        boolean autoAck=false;//自动应答，true=自动发送应答；false=手动发送应答；        channel.basicConsume(TASK_QUEUE_NAME, autoAck, consumer);    }    /**     * 模拟延时消费消息     * @param task     */    private static void doWork(String task) {        for (char ch : task.toCharArray()) {            if (ch == '.') {                try {                    Thread.sleep(1000);                } catch (InterruptedException _ignored) {                    Thread.currentThread().interrupt();                }            }        }    }}

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