Méthodes d'implémentation de persistance et de confirmation de publication dans Java RabbitMQ

/**
 * @Description 持久化MQ
 * @date 2022/3/7 9:14
 */
public class Producer3 {
    private static final String LONG_QUEUE = "long_queue";
    public static void main(String[] args) throws Exception {
        Channel channel = RabbitMQUtils.getChannel();
        // 持久化队列
        channel.queueDeclare(LONG_QUEUE,true,false,false,null);
        Scanner scanner = new Scanner(System.in);
        int i = 0;
        while (scanner.hasNext()){
            i++;
            String msg = scanner.next() + i;
            // 持久化消息
            channel.basicPublish("",LONG_QUEUE, MessageProperties.PERSISTENT_TEXT_PLAIN,msg.getBytes(StandardCharsets.UTF_8));
            System.out.println("发送消息：'" + msg + "'成功");
        }
    }
}

/**
 * @Description 不公平分发消费者
 * @date 2022/3/7 9:27
 */
public class Consumer2 {
    private static final String LONG_QUEUE = "long_queue";
    public static void main(String[] args) throws Exception {
        Channel channel = RabbitMQUtils.getChannel();
        DeliverCallback deliverCallback = (consumerTag, message) -> {
            // 模拟并发沉睡三十秒
            try {
                Thread.sleep(30000);
                System.out.println("线程B接收消息："+ new String(message.getBody(), StandardCharsets.UTF_8));
                channel.basicAck(message.getEnvelope().getDeliveryTag(),false);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        };
        // 设置不公平分发
        channel.basicQos(1);
        channel.basicConsume(LONG_QUEUE,false,deliverCallback,
                consumerTag -> {
                    System.out.println(consumerTag + "消费者取消消费");
                });
    }
}

/**
 * @Description 确认发布——单个确认
 * @date 2022/3/7 14:49
 */
public class SoloProducer {
    private static final int MESSAGE_COUNT = 100;
    private static final String QUEUE_NAME = "confirm_solo";
    public static void main(String[] args) throws Exception {
        Channel channel = RabbitMQUtils.getChannel();
        // 产生队列
        channel.queueDeclare(QUEUE_NAME,true,false,false,null);
        // 开启确认发布
        channel.confirmSelect();
        // 记录开始时间
        long beginTime = System.currentTimeMillis();
        for (int i = 0; i < MESSAGE_COUNT; i++) {
            String msg = ""+i;
            channel.basicPublish("",QUEUE_NAME, MessageProperties.PERSISTENT_TEXT_PLAIN,msg.getBytes(StandardCharsets.UTF_8));
            // 单个发布确认
            boolean flag = channel.waitForConfirms();
            if (flag){
                System.out.println("发送消息：" + i);
            }
        }
        // 记录结束时间
        long endTime = System.currentTimeMillis();
        System.out.println("发送" + MESSAGE_COUNT + "条消息消耗："+(endTime - beginTime) + "毫秒");   }
}

/**
 * @Description 确认发布——批量确认
 * @date 2022/3/7 14:49
 */
public class BatchProducer {
    private static final int MESSAGE_COUNT = 100;
    private static final String QUEUE_NAME = "confirm_batch";
    public static void main(String[] args) throws Exception {
        Channel channel = RabbitMQUtils.getChannel();
        // 产生队列
        channel.queueDeclare(QUEUE_NAME,true,false,false,null);
        // 开启确认发布
        channel.confirmSelect();
        // 设置一个多少一批确认一次。
        int batchSize = MESSAGE_COUNT / 10;
        // 记录开始时间
        long beginTime = System.currentTimeMillis();
        for (int i = 0; i < MESSAGE_COUNT; i++) {
            String msg = ""+i;
            channel.basicPublish("",QUEUE_NAME, MessageProperties.PERSISTENT_TEXT_PLAIN,msg.getBytes(StandardCharsets.UTF_8));
            // 批量发布确认
            if (i % batchSize == 0){
                if (channel.waitForConfirms()){
                    System.out.println("发送消息：" + i);
                }
            }
        }
        // 记录结束时间
        long endTime = System.currentTimeMillis();
        System.out.println("发送" + MESSAGE_COUNT + "条消息消耗："+(endTime - beginTime) + "毫秒");
    }
}

/**
 * @Description 确认发布——异步确认
 * @date 2022/3/7 14:49
 */
public class AsyncProducer {
    private static final int MESSAGE_COUNT = 100;
    private static final String QUEUE_NAME = "confirm_async";
    public static void main(String[] args) throws Exception {
        Channel channel = RabbitMQUtils.getChannel();
        // 产生队列
        channel.queueDeclare(QUEUE_NAME,true,false,false,null);
        // 开启确认发布
        channel.confirmSelect();
        // 记录开始时间
        long beginTime = System.currentTimeMillis();
        // 确认成功回调
        ConfirmCallback ackCallback = (deliveryTab,multiple) ->{
            System.out.println("确认成功消息：" + deliveryTab);
        };
        // 确认失败回调
        ConfirmCallback nackCallback = (deliveryTab,multiple) ->{
            System.out.println("未确认的消息：" + deliveryTab);
        };
        // 消息监听器
        /**
         * addConfirmListener:
         *                  1. 确认成功的消息；
         *                  2. 确认失败的消息。
         */
        channel.addConfirmListener(ackCallback,nackCallback);
        for (int i = 0; i < MESSAGE_COUNT; i++) {
            String msg = "" + i;
            channel.basicPublish("",QUEUE_NAME, MessageProperties.PERSISTENT_TEXT_PLAIN,msg.getBytes(StandardCharsets.UTF_8));
        }

        // 记录结束时间
        long endTime = System.currentTimeMillis();
        System.out.println("发送" + MESSAGE_COUNT + "条消息消耗："+(endTime - beginTime) + "毫秒");
    }
}