SpringBoot+RabbitMq具体使用的几种姿势

网友投稿 227 2023-01-07


SpringBoot+RabbitMq具体使用的几种姿势

目前主流的消息中间件有activemq,rabbitmq,rocketmq,kafka,我们要根据实际的业务场景来选择一款合适http://的消息中间件,关注的主要指标有,消息投递的可靠性,可维护性,吞吐量以及中间件的特色等重要指标来选择,大数据领域肯定是kafka,那么传统的业务场景就是解耦,异步,削峰。那么就在剩下的3款产品中选择一款,从吞吐量,社区的活跃度,消息的可靠性出发,一般的中小型公司选择rabbitmq来说可能更为合适。那么我们就来看看如何使用它吧。

环境准备

本案例基于springboot集成rabbitmq,本案例主要侧重要实际的code,对于基础理论知识请自行百度。

jdk-version:1.8

rabbitmq-version:3.7

springboot-version:2.1.4.RELEASE

pom文件

org.springframework.boot

spring-boot-starter-amqp

yml配置文件

spring:

rabbitmq:

password: guest

username: guest

port: 5672

addresses: 127.0.0.1

#开启发送失败返回

publisher-returns: true

#开启发送确认

publisher-confirms: true

listener:

simple:

#指定最小的消费者数量.

concurrency: 2

#指定最大的消费者数量.

max-concurrency: 2

#开启ack

acknowledge-mode: auto

#开启ack

direct:

acknowledge-mode: auto

#支持消息的确认与返回

template:

mandatory: true

配置rabbitMq的姿势

姿势一

基于javaconfig

package com.lly.order.message;

import org.springframework.amqp.core.*;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

/**

* @ClassName RabbitMqConfig

* @Description rabbitMq配置类

* @Author lly

* @Date 2019-05-13 15:05

* @Version 1.0

**/

@Configuration

public class RabbitMqConfig {

public final static String DIRECT_QUEUE = "directQueue";

public final static String TOPIC_QUEUE_ONE = "topic_queue_one";

public final static String TOPIC_QUEUE_TWO = "topic_queue_two";

public final static String FANOUT_QUEUE_ONE = "fanout_queue_one";

public final static String FANOUT_QUEUE_TWO = "fanout_queue_two";

public final static String TOPIC_EXCHANGE = "topic_exchange";

public final static String FANOUT_EXCHANGE = "fanout_exchange";

public final static String TOPIC_ROUTINGKEY_ONE = "common_key";

public final static String TOPIC_ROUTINGKEY_TWO = "*.key";

// direct模式队列

@Bean

public Queue directQueue() {

return new Queue(DIRECT_QUEUE, true);

}

// topic 订阅者模式队列

@Bean

public Queue topicQueueOne() {

return new Queue(TOPIC_QUEUE_ONE, true);

}

@Bean

public Queue topicQueueTwo() {

return new Queue(TOPIC_QUEUE_TWO, true);

}

// fanout 广播者模式队列

@Bean

public Queue fanoutQueueOne() {

return new Queue(FANOUT_QUEUE_ONE, true);

}

@Bean

public Queue fanoutQueueTwo() {

return new Queue(FANOUT_QUEUE_TWO, true);

}

// topic 交换器

@Bean

public TopicExchange topExchange() {

return new TopicExchange(TOPIC_EXCHANGE);

}

// fanout 交换器

@Bean

public FanoutExchange fanoutExchange() {

return new FanoutExchange(FANOUT_EXCHANGE);

}

// 订阅者模式绑定

@Bean

public Binding topExchangeBingingOne() {

return BindingBuilder.bind(topicQueueOne()).to(topExchange()).with(TOPIC_ROUTINGKEY_ONE);

}

@Bean

public Binding topicExchangeBingingTwo() {

return BindingBuilder.bind(topicQueueTwo()).to(topExchange()).with(TOPIC_ROUTINGKEY_TWO);

}

// 广播模式绑定

@Bean

public Binding fanoutExchangeBingingOne() {

return BindingBuilder.bind(fanoutQueueOne()).to(fanoutExchange());

}

@Bean

public Binding fanoutExchangeBingingTwo() {

return BindingBuilder.bind(fanoutQueueTwo()).to(fanoutExchange());

}

}

姿势二

基于注解

package com.lly.order.message;

import com.rabbitmq.client.Channel;

import lombok.extern.slf4j.Slf4j;

import org.springframework.amqp.core.AmqpTemplate;

import org.springframework.amqp.core.ExchangeTypes;

import org.springframework.amqp.core.Message;

import org.springframework.amqp.rabbit.annotation.Exchange;

import org.springframework.amqp.rabbit.annotation.Queue;

import org.springframework.amqp.rabbit.annotation.QueueBinding;

import org.springframework.amqp.rabbit.annotation.RabbitListener;

import org.springframework.amqp.rabbit.connection.CorrelationData;

import org.springframework.amqp.rabbit.core.RabbitTemplate;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Component;

import java.io.IOException;

import java.time.LocalTime;

import java.util.UUID;

/**

* @ClassName MQTest

* @Description 消息队列测试

* @Author lly

* @Date 2019-05-13 10:50

* @Version 1.0

**/

@Component

@Slf4j

public class MQTest implements RabbitTemplate.ConfirmCallback, RabbitTemplate.ReturnCallback {

private final static String QUEUE = "test_queue";

@Autowired

private AmqpTemplate amqpTemplate;

@Autowired

private RabbitTemplate rabbitTemplate;

public MQTest(RabbitTemplate rabbitTemplate) {

rabbitTemplate.setConfirmCallback(this);

rabbitTemplate.setReturnCallback(this);

}

public void sendMq() {

rabbitTemplate.convertAndSend("test_queue", "test_queue" + LocalTime.now());

log.info("发送消息:{}", "test_queue" + LocalTime.now());

}

public void sendMqRabbit() {

//回调id

CorrelationData cId = new CorrelationData(UUID.randomUUID().toString());

// rabbitTemplate.convertAndSend(RabbitMqConfig.FANOUT_EXCHANGE, "", "广播者模式测试",cId);

Object object = rabbitTemplate.convertSendAndReceive(RabbitMqConfig.FANOUT_EXCHANGE, "", "广播者模式测试", cId);

log.info("发送消息:{},object:{}", "广播者模式测试" + LocalTime.now(), object);

}

//发送订阅者模式

public void sendMqExchange() {

CorrelationData cId = new CorrelationData(UUID.randomUUID().toString());

CorrelationData cId01 = new CorrelationData(UUID.randomUUID().toString());

log.info("订阅者模式->发送消息:routing_key_one");

rabbitTemplate.convertSendAndReceive("topic_exchange", "routing_key_one", "routing_key_one" + LocalTime.now(), cId);

log.info("订阅者模式->发送消息routing_key_two");

rabbitTemplate.convertSendAndReceive("topic_exchange", "routing_key_two", "routing_key_two" + LocalTime.now(), cId01);

}

//如果不存在,自动创建队列

@RabbitListener(queuesToDeclare = @Queue("test_queue"))

public void receiverMq(String msg) {

log.info("接收到队列消息:{}", msg);

}

//如果不存在,自动创建队列和交换器并且绑定

@RabbitListener(bindings = {

@QueueBinding(value = @Queue(value = "topic_queue01", durable = "true"),

exchange = @Exchange(value = "topic_exchange", type = ExchangeTypes.TOPIC),

key = "routing_key_one")})

public void receiverMqExchage(String msg, Channel channel, Message message) throws IOException {

long deliveryTag = message.getMessageProperties().getDeliveryTag();

try {

log.info("接收到topic_routing_key_one消息:{}", msg);

//发生异常

log.error("发生异常");

int i = 1 / 0;

//告诉服务器收到这条消息 已经被我消费了 可以在队列删掉 这样以后就不会再发了 否则消息服务器以为这条消息没处理掉 后续还会在发

channel.basicAck(deliveryTag, false);

} catch (Exception e) {

log.error("接收消息失败,重新放回队列");

//requeu,为true,代表重新放入队列多次失败重新放回会导致队列堵塞或死循环问题,

// 解决方案,剔除此消息,然后记录到db中去补偿

//channel.basicNack(deliveryTag, false, true);

//拒绝消息

//channel.basicReject(deliveryTag, true);

}

}

@RabbitListener(bindings = {

@QueueBinding(value = @Queue(value = "topic_queue02", durable = "true"),

exchange = @Exchange(value = "topic_exchange", type = ExchangeTypes.TOPIC),

key = "routing_key_two")})

public void receiverMqExchageTwypOxnmIo(String msg) {

log.info("接收到topic_routing_key_two消息:{}", msg);

}

@RabbitListener(queues = RabbitMqConfig.FANOUT_QUEUE_ONE)

public void receiverMqFanout(String msg, Channel channel, Message message) throws IOException {

long deliveryTag = message.getMessageProperties().getDeliveryTag();

try {

log.info("接收到队列fanout_queue_one消息:{}", msg);

channel.basicAck(deliveryTag, false);

} catch (Exception e) {

e.printStackTrace();

//多次失败重新放回会导致队列堵塞或死循环问题 丢弃这条消息

// channel.basicNack(message.getMessageProperties().getDeliveryTag(), false, false);

log.error("接收消息失败");

}

}

@RabbitListener(queues = RabbitMqConfig.FANOUT_QUEUE_TWO)

public void receiverMqFanoutTwo(String msg) {

log.info("接收到队列fanout_queue_two消息:{}", msg);

}

/**

* @return

* @Author lly

* @Description 确认消息是否发送到exchange

* @Date 2019-05-14 15:36

* @Param [correlationData, ack, cause]

**/

@Override

public void confirm(CorrelationData correlationData, boolean ack, String cause) {

log.info("消息唯一标识id:{}", correlationData);

log.info("消息确认结果!");

log.error("消息失败原因,cause:{}", cause);

}

/**

* @return

* @Author lly

* @Description 消息消费发生异常时返回

* @Date 2019-05-14 16:22

* @Param [message, replyCode, replyText, exchange, routingKey]

**/

@Override

public void returnedMessage(Message message, int replyCode, String replyText, String exchange, String routingKey) {

log.info("消息发送失败id:{}", message.getMessageProperties().getCorrelationId());

log.info("消息主体 message : ", message);

log.info("消息主体 message : ", replyCode);

log.info("描述:" + replyText);

log.info("消息使用的交换器 exchange : ", exchange);

log.info("消息使用的路由键 routing : ", routingKey);

}

}

rabbitMq消息确认的三种方式

# 发送消息后直接确认消息

acknowledge-mode:none

# 根据消息消费的情况,智能判定消息的确认情况

acknowledge-mode:auto

# 手动确认消息的情况

acknowledge-mode:manual

我们以topic模式来试验下消息的ack

自动确认消息模式

手动确认消息模式

然后我们再次消费消息,发现消息是没有被确认的,所以可以被再次消费

发现同样的消息还是存在的没有被队列删除,必须手动去ack,我们修改队列1的手动ack看看效果

channel.basicAck(deliveryTag, false);

重启项目再次消费消息

再次查看队列里的消息,发现队列01里的消息被删除了,队列02的还是存在。

消费消息发生异常的情况,修改代码 模拟发生异常的情况下发生了什么, 异常发生了,消息被重放进了队列

但是会导致消息不停的循环消费,然后失败,致死循环调用大量服务器资源

所以我们正确的处理方式是,发生异常,将消息记录到db,再通过补偿机制来补偿消息,或者记录消息的重复次数,进行重试,超过几次后再放到db中。

总结


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