设置消息TTL——对消息本身单独进行设置

红太狼 2021-07-24 21:04 383阅读 0赞

**一 代码**

package com.rabbitmq.ttl;
    
    import com.rabbitmq.client.AMQP;
    import com.rabbitmq.client.Channel;
    import com.rabbitmq.client.Connection;
    import com.rabbitmq.client.ConnectionFactory;
    import com.rabbitmq.util.ConnectionUtils;
    import java.io.IOException;
    import java.util.concurrent.TimeoutException;
    
    /**
    * 消息过期（消息自身设置）
    */
    public class MsgTTL1 {
        private static final String EXCHANGE_NAME = "exchange_demo";
        private static final String ROUTING_KEY = "routingkey_demo";
        private static final String QUEUE_NAME = "msgTTL1_demo";
        private static final String IP_ADDRESS = "127.0.0.1";
        private static final int PORT = 5672;//RabbitMQ（AMQP） 服务端默认端口号为 5672
    
        public static void main(String[] args) throws IOException,
                TimeoutException, InterruptedException {
            ConnectionFactory factory = new ConnectionFactory();
            factory.setHost(IP_ADDRESS);
            factory.setUsername("root");
            factory.setPassword("123456");
            Connection connection = factory.newConnection();
            Channel channel = connection.createChannel();
            // 创建一个 type="direct" 、持久化的、非自动删除的交换器
            channel.exchangeDeclare(EXCHANGE_NAME, "direct", true, false, null);
            // 创建一个持久化、非排他的、非自动删除的队列
            channel.queueDeclare(QUEUE_NAME, true, false, false, null);
            // 将交换器与队列通过路由键绑定
            channel.queueBind(QUEUE_NAME, EXCHANGE_NAME, ROUTING_KEY);
            // 发送一条持久化的消息: hello world !
            String message = "Hello World !";
    
            AMQP.BasicProperties.Builder builder = new AMQP.BasicProperties.Builder();
            builder.deliveryMode(2);
            builder.expiration("30000");   // 30秒
            AMQP.BasicProperties properties = builder.build();
            // 消息发布
            // 第三个参数为mandatory
            channel.basicPublish(EXCHANGE_NAME, ROUTING_KEY, false,
                    properties, message.getBytes());
            ConnectionUtils.close(channel, connection);
        }
    }

**二 测试**

1 30秒内查看消息是否还存在于队列——存在于队列

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

2 30秒后查看消息是否还存在于队列——不存在于队列

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1][]

**三 参考代码**

[https://github.com/cakin24/RabbitMQDemo/blob/master/src/main/java/com/rabbitmq/ttl/MsgTTL1.java][https_github.com_cakin24_RabbitMQDemo_blob_master_src_main_java_com_rabbitmq_ttl_MsgTTL1.java]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1]: /images/20210724/c19a3cb44e484b3bb9bd1856612f7ad5.png
[https_github.com_cakin24_RabbitMQDemo_blob_master_src_main_java_com_rabbitmq_ttl_MsgTTL1.java]: https://github.com/cakin24/RabbitMQDemo/blob/master/src/main/java/com/rabbitmq/ttl/MsgTTL1.java