RabbitMQ:SpringBoot整合RabbitMQ开启手动签收模式

RabbitMQ开启手动签收模式配置

 rabbitmq:
  ####连接地址
    host: 127.0.0.1
   ####端口号   
    port: 5672
   ####账号 
    username: guest
   ####密码  
    password: guest
   ### 地址
    virtual-host: /
    listener:
      simple:
        retry:
        ####开启消费者（程序出现异常的情况下会）进行重试
          enabled: true
         ####最大重试次数
          max-attempts: 5
        ####重试间隔次数
          initial-interval: 3000
        ####开启手动ack  
        acknowledge-mode: manual 

接收消息

	@RabbitListener(queues = "fanout_email_queue")
	public void process(Message message, @Headers Map<String, Object> headers, Channel channel) throws Exception {

		String messageId = message.getMessageProperties().getMessageId();

		String msg = new String(message.getBody(), "UTF-8");

		System.out.println("邮件消费者获取生产者消息msg:" + msg + ",消息id:" + messageId);
		// 重试机制都是间隔性

		JSONObject jsonObject = JSONObject.parseObject(msg);

		String email = jsonObject.getString("email");

		String emailUrl = "http://127.0.0.1:8083/sendEmail?email=" + email;

		System.out.println("邮件消费者开始调用第三方邮件服务器,emailUrl:" + emailUrl);

		JSONObject result = HttpClientUtils.httpGet(emailUrl);
		// 如果调用第三方邮件接口无法访问，如何实现自动重试.
		if (result == null) {
			throw new Exception("调用第三方邮件服务器接口失败!");
		}
		System.out.println("邮件消费者结束调用第三方邮件服务器成功,result:" + result + "程序执行结束");
		// 手动ack
		Long deliveryTag = (Long) headers.get(AmqpHeaders.DELIVERY_TAG);
		// 手动签收
		channel.basicAck(deliveryTag, false);
		//            channel.basicNack(message.getMessageProperties().getDeliveryTag(), false, false);

	}
	// 默认是自动应答模式