SpringBoot中使用注解的方式创建队列和交换机
前言
最开始蘑菇博客在进行初始化配置的时候,需要手动的创建交换机,创建队列,然后绑定交换机,这个步骤是非常繁琐的,而且一不小心的话,还可能就出了错误,之前就有个小伙伴在创建交换机的时候 , 将交换机的名称exchange.direct
写成了 exchanges.direct
。然后导致消息无法正常被消费,后面通过排查了很久才发现这个问题,下面为了解决这个手动创建的痛苦,使用了注解的方式来进行队列和交换机的创建
创建交换机
交换机的声明比较简单,通过ExchangeBuilder创建一个路由交换机
public static final String EXCHANGE_DIRECT = "exchange.direct";/**
* 申明交换机
*/
@Bean(EXCHANGE_DIRECT)
public Exchange EXCHANGE_DIRECT() {// 申明路由交换机,durable:在rabbitmq重启后,交换机还在return ExchangeBuilder.directExchange(EXCHANGE_DIRECT).durable(true).build();
}
创建队列
队列的话,我们直接使用new Queue() 传入队列名称即可
public static final String MOGU_BLOG = "mogu.blog";
public static final String MOGU_EMAIL = "mogu.email";
public static final String MOGU_SMS = "mogu.sms";/**
* 申明Blog队列
* @return
*/
@Bean(MOGU_BLOG)
public Queue MOGU_BLOG() {return new Queue(MOGU_BLOG);
}/**
* 申明Email队列
* @return
*/
@Bean(MOGU_EMAIL)
public Queue MOGU_EMAIL() {return new Queue(MOGU_EMAIL);
}/**
* 申明SMS队列
* @return
*/
@Bean(MOGU_SMS)
public Queue MOGU_SMS() {return new Queue(MOGU_SMS);
}
绑定交换机和队列
在我们创建完交换机和队列后,我们就需要将其绑定起来,在这里需要使用@Qualifie
从Spring容器中加载前面创建的Bean,也就是队列和交换机,然后通过 BindingBuilder.bind(queue).to(exchange)
进行绑定,同时我们还需要配置RoutingKey,也就是路由
public static final String ROUTING_KEY_BLOG = "mogu.blog";
public static final String ROUTING_KEY_EMAIL = "mogu.email";
public static final String ROUTING_KEY_SMS = "mogu.sms";/**
* mogu.blog 队列绑定交换机,指定routingKey
* @param queue
* @param exchange
* @return
*/
@Bean
public Binding BINDING_QUEUE_INFORM_BLOG(@Qualifier(MOGU_BLOG) Queue queue, @Qualifier(EXCHANGE_DIRECT) Exchange exchange) {return BindingBuilder.bind(queue).to(exchange).with(ROUTING_KEY_BLOG).noargs();
}/**
* mogu.mail 队列绑定交换机,指定routingKey
* @param queue
* @param exchange
* @return
*/
@Bean
public Binding BINDING_QUEUE_INFORM_EMAIL(@Qualifier(MOGU_EMAIL) Queue queue, @Qualifier(EXCHANGE_DIRECT) Exchange exchange) {return BindingBuilder.bind(queue).to(exchange).with(ROUTING_KEY_EMAIL).noargs();
}/**
* mogu.sms 队列绑定交换机,指定routingKey
* @param queue
* @param exchange
* @return
*/
@Bean
public Binding BINDING_QUEUE_INFORM_SMS(@Qualifier(MOGU_SMS) Queue queue, @Qualifier(EXCHANGE_DIRECT) Exchange exchange) {return BindingBuilder.bind(queue).to(exchange).with(ROUTING_KEY_BLOG).noargs();
}
下面我们把之前手动创建的Exchange和Queue删除后,然后重新运行mogu_sms项目,发现已经能够通过注解的方式成功创建队列和交换机了,并且如下图所示,成功绑定了起来
完整代码
package com.moxi.mogublog.sms.config;import org.springframework.amqp.core.*;
import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
import org.springframework.amqp.support.converter.MessageConverter;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;/*** RabbitMQ配置文件*/
@Configuration
public class RabbitMqConfig {public static final String MOGU_BLOG = "mogu.blog";public static final String MOGU_EMAIL = "mogu.email";public static final String MOGU_SMS = "mogu.sms";public static final String EXCHANGE_DIRECT = "exchange.direct";public static final String ROUTING_KEY_BLOG = "mogu.blog";public static final String ROUTING_KEY_EMAIL = "mogu.email";public static final String ROUTING_KEY_SMS = "mogu.sms";/*** 申明交换机*/@Bean(EXCHANGE_DIRECT)public Exchange EXCHANGE_DIRECT() {// 申明路由交换机,durable:在rabbitmq重启后,交换机还在return ExchangeBuilder.directExchange(EXCHANGE_DIRECT).durable(true).build();}/*** 申明Blog队列* @return*/@Bean(MOGU_BLOG)public Queue MOGU_BLOG() {return new Queue(MOGU_BLOG);}/*** 申明Email队列* @return*/@Bean(MOGU_EMAIL)public Queue MOGU_EMAIL() {return new Queue(MOGU_EMAIL);}/*** 申明SMS队列* @return*/@Bean(MOGU_SMS)public Queue MOGU_SMS() {return new Queue(MOGU_SMS);}/*** mogu.blog 队列绑定交换机,指定routingKey* @param queue* @param exchange* @return*/@Beanpublic Binding BINDING_QUEUE_INFORM_BLOG(@Qualifier(MOGU_BLOG) Queue queue, @Qualifier(EXCHANGE_DIRECT) Exchange exchange) {return BindingBuilder.bind(queue).to(exchange).with(ROUTING_KEY_BLOG).noargs();}/*** mogu.mail 队列绑定交换机,指定routingKey* @param queue* @param exchange* @return*/@Beanpublic Binding BINDING_QUEUE_INFORM_EMAIL(@Qualifier(MOGU_EMAIL) Queue queue, @Qualifier(EXCHANGE_DIRECT) Exchange exchange) {return BindingBuilder.bind(queue).to(exchange).with(ROUTING_KEY_EMAIL).noargs();}/*** mogu.sms 队列绑定交换机,指定routingKey* @param queue* @param exchange* @return*/@Beanpublic Binding BINDING_QUEUE_INFORM_SMS(@Qualifier(MOGU_SMS) Queue queue, @Qualifier(EXCHANGE_DIRECT) Exchange exchange) {return BindingBuilder.bind(queue).to(exchange).with(ROUTING_KEY_BLOG).noargs();}@Beanpublic MessageConverter messageConverter() {return new Jackson2JsonMessageConverter();}}