RabbitMQ实现消息可靠性传递过程讲解

<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>

@SpringBootTest
@RunWith(SpringRunner.class)
class RabbitmqProducerApplicationTests {
    @Autowired
    private RabbitTemplate rabbitTemplate;
    @Test
    void testProducer() {
        rabbitTemplate.setConfirmCallback(new RabbitTemplate.ConfirmCallback() {
            //三个参数分别为：相关配置消息、交换机是否收到消息、未收到消息的原因
            @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);
            }
        });
        // 设置交换机处理失败消息的模式
        // true:消息到达不了队列时 会将消息重新返回给生产者 false:消息到达不了队列直接丢弃(默认)
        rabbitTemplate.setMandatory(true);
        rabbitTemplate.setReturnCallback(new RabbitTemplate.ReturnCallback() {
            //五个参数分别为：消息对象、失败状态码、失败信息、交换机名称、路由键
            @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");
            }
        });
        rabbitTemplate.convertAndSend(RabbitMQConfig.EXCHANGE_NAME,"test.heHe","HelloWorld");
    }
}

rabbitTemplate.convertAndSend(RabbitMQConfig.EXCHANGE_NAME + "1","test.heHe","HelloWorld");

rabbitTemplate.convertAndSend(RabbitMQConfig.EXCHANGE_NAME,"t.heHe","HelloWorld");