RabbitMQ消息单独与批量的TTL详细介绍

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-amqp</artifactId>
        <version>2.5.0</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>
</dependencies>

/**
 * 定义交换机与队列的Bean 并且使之绑定
 */
@Component
public class RabbitMQConfig {
    public static final String TTL_EXCHANGE_NAME = "ttl_exchange_name";
    public static final String TTL_QUEUE_NAME = "ttl_queue_name";
    @Bean("ttlExchange")
    public Exchange ttlExchange(){
        return ExchangeBuilder.topicExchange(TTL_EXCHANGE_NAME).durable(true).build();
    }
    //配置队列的时候顺带上ttl()方法 其内部对MQ设置了参数"x-message-ttl"
    //注意这里的单位是毫秒 所以我写的参数为10000毫秒即10秒
    @Bean("ttlQueue")
    public Queue ttlQueue(){
        return QueueBuilder.durable(TTL_QUEUE_NAME).ttl(10000).build();
    }
    @Bean
    public Binding ttl(@Qualifier("ttlExchange") Exchange exchange,
                       @Qualifier("ttlQueue") Queue queue){
        return BindingBuilder.bind(queue).to(exchange).with("test.#").noargs();
    }
}

@SpringBootTest
@RunWith(SpringRunner.class)
class RabbitmqProducerApplicationTests {
    @Autowired
    private RabbitTemplate rabbitTemplate;
    @Test
    void testTTL(){
        rabbitTemplate.setConfirmCallback(new RabbitTemplate.ConfirmCallback() {
            @Override
            public void confirm(CorrelationData correlationData, boolean b, String s) {
                if(b) System.out.println("交换机成功接受到了消息");
                else System.out.println("消息失败原因" + s);
            }
        });
        rabbitTemplate.setMandatory(true);
        rabbitTemplate.setReturnCallback(new RabbitTemplate.ReturnCallback() {
            @Override
            public void returnedMessage(Message message, int i, String s, String s1, String s2) {
                System.out.println("队列接受不到交换机的消息进行了失败回调");
            }
        });
        // 以上代码只是保证消息传递的可靠性 与TTL无关
        for(int i = 0; i < 10; ++i){
            rabbitTemplate.convertAndSend(RabbitMQConfig.TTL_EXCHANGE_NAME,"test.heHe","HelloWorld");
        }
    }
}

@SpringBootTest
@RunWith(SpringRunner.class)
class RabbitmqProducerApplicationTests {
    @Autowired
    private RabbitTemplate rabbitTemplate;
    @Test
    void testTTL(){
        rabbitTemplate.setConfirmCallback(new RabbitTemplate.ConfirmCallback() {
            @Override
            public void confirm(CorrelationData correlationData, boolean b, String s) {
                if(b) System.out.println("交换机成功接受到了消息");
                else System.out.println("消息失败原因" + s);
            }
        });
        rabbitTemplate.setMandatory(true);
        rabbitTemplate.setReturnCallback(new RabbitTemplate.ReturnCallback() {
            @Override
            public void returnedMessage(Message message, int i, String s, String s1, String s2) {
                System.out.println("队列接受不到交换机的消息进行了失败回调");
            }
        });
        // 以上代码只是保证消息传递的可靠性 与TTL无关
        // 消息的后处理对象 设置一些消息的参数信息
        MessagePostProcessor messagePostProcessor = new MessagePostProcessor(){
            @Override
            public Message postProcessMessage(Message message) throws AmqpException {
                message.getMessageProperties().setExpiration("5000");//设置消息对象5s后过期
                return message;
            }
        };
        //消息单独5s过期
        rabbitTemplate.convertAndSend(RabbitMQConfig.TTL_EXCHANGE_NAME,"test.heHe","HelloWorld",messagePostProcessor);
        //队列中的消息全体10s过期
        for(int i = 0; i < 10; ++i){
            rabbitTemplate.convertAndSend(RabbitMQConfig.TTL_EXCHANGE_NAME,"test.heHe","HelloWorld");
        }
    }
}