Spring - RabbitMQ循环依赖问题解决

代码整合消息队列后，启动报错，出现rabbitMQ循环依赖的问题

异常信息：

┌─────┐
|  rabbitTemplate defined in class path resource [org/springframework/boot/autoconfigure/amqp/RabbitAutoConfiguration$RabbitTemplateConfiguration.class]
↑     ↓
|  myRabbitConfig (field org.springframework.amqp.rabbit.core.RabbitTemplate com.xxxx.gulimall.order.config.MyRabbitConfig.rabbitTemplate)
└─────┘

解决方法：

1. 注释掉 @Autowired和@PostConstruct注解

2. 自己给容器中放一个RabbitTemplate,参考RabbitAutoConfiguration$RabbitTemplateConfiguration.class

3. 手动初始化模板方法

   @Primary
   @Bean
   public RabbitTemplate rabbitTemplate(ConnectionFactory connectionFactory) {
   RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory);
   this.rabbitTemplate = rabbitTemplate;
   rabbitTemplate.setMessageConverter(messageConverter());
   initRabbitTemplate();
   return rabbitTemplate;
   }

完整代码：

@Configuration
public class MyRabbitConfig {

    RabbitTemplate rabbitTemplate;

    @Primary
    @Bean
    public RabbitTemplate rabbitTemplate(ConnectionFactory connectionFactory) {
        RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory);
        this.rabbitTemplate = rabbitTemplate;
        rabbitTemplate.setMessageConverter(messageConverter());
        initRabbitTemplate();
        return rabbitTemplate;
    }

    @Bean
    public MessageConverter messageConverter() {
        return new Jackson2JsonMessageConverter();
    }

//    @PostConstruct // MyRabbitConfig 对象创建完成以后，执行这个方法
    public void initRabbitTemplate() {
        rabbitTemplate.setConfirmCallback(new RabbitTemplate.ConfirmCallback() {
            @Override
            public void confirm(CorrelationData correlationData, boolean b, String s) {
                System.out.println("confirm...correlationData=" + correlationData + ", b=" + b + ", s=" + s);
            }
        });

        rabbitTemplate.setReturnCallback(new RabbitTemplate.ReturnCallback() {
            @Override
            public void returnedMessage(@Nullable Message message, int replyCode, @Nullable String replyText, @Nullable String exchange, @Nullable String routingKey) {
                System.out.println("fail Message="+message+",replyCode="+replyCode+",replyText="+replyText +",exchange="+exchange+",routingKey="+routingKey);
            }
        });
    }


}

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