這篇文章帶你瞭解怎麼整合RabbitMQ服務器,而且經過它怎麼去發送和接收消息。我將構建一個springboot工程,經過RabbitTemplate去經過MessageListenerAdapter去訂閱一個POJO類型的消息。須要JAVA Spring Cloud大型企業分佈式微服務雲構建的B2B2C電子商務平臺源碼:三五三六二四七二五九html
準備工做
15min
IDEA
maven 3.0
在開始構建項目以前,機器須要安裝rabbitmq,你能夠去官網下載,http://www.rabbitmq.com/download.html ,若是你是用的Mac(程序員都應該用mac吧),你能夠這樣下載:
brew install rabbitmq
安裝完成後開啓服務器:
rabbitmq-server
開啓服務器成功,你能夠看到如下信息:程序員
RabbitMQ 3.1.3. Copyright (C) 2007-2013 VMware, Inc. ## ## Licensed under the MPL. See http://www.rabbitmq.com/ ## ## ########## Logs: /usr/local/var/log/rabbitmq/rabbit@localhost.log ###### ## /usr/local/var/log/rabbitmq/rabbit@localhost-sasl.log ########## Starting broker... completed with 6 plugins.
構建工程
構架一個SpringBoot工程,其pom文件依賴加上spring-boot-starter-amqp的起步依賴:spring
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-amqp</artifactId> </dependency>
建立消息接收者
在任何的消息隊列程序中,你須要建立一個消息接收者,用於響應發送的消息。springboot
@Component public class Receiver { private CountDownLatch latch = new CountDownLatch(1); public void receiveMessage(String message) { System.out.println("Received <" + message + ">"); latch.countDown(); } public CountDownLatch getLatch() { return latch; } }
消息接收者是一個簡單的POJO類,它定義了一個方法去接收消息,當你註冊它去接收消息,你能夠給它取任何的名字。瞭解springcloud架構能夠加求求:三五三六二四七二五九。其中,它有CountDownLatch這樣的一個類,它是用於告訴發送者消息已經收到了,你不須要在應用程序中具體實現它,只須要latch.countDown()就好了。服務器
建立消息監聽,併發送一條消息
在spring程序中,RabbitTemplate提供了發送消息和接收消息的全部方法。你只需簡單的配置下就好了:架構
須要一個消息監聽容器
聲明一個quene,一個exchange,而且綁定它們
一個組件去發送消息
代碼清單以下:併發
package com.forezp; import com.forezp.message.Receiver; import org.springframework.amqp.core.Binding; import org.springframework.amqp.core.BindingBuilder; import org.springframework.amqp.core.Queue; import org.springframework.amqp.core.TopicExchange; import org.springframework.amqp.rabbit.connection.ConnectionFactory; import org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer; import org.springframework.amqp.rabbit.listener.adapter.MessageListenerAdapter; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.annotation.Bean; @SpringBootApplication public class SpringbootRabbitmqApplication { final static String queueName = "spring-boot"; @Bean Queue queue() { return new Queue(queueName, false); } @Bean TopicExchange exchange() { return new TopicExchange("spring-boot-exchange"); } @Bean Binding binding(Queue queue, TopicExchange exchange) { return BindingBuilder.bind(queue).to(exchange).with(queueName); } @Bean SimpleMessageListenerContainer container(ConnectionFactory connectionFactory, MessageListenerAdapter listenerAdapter) { SimpleMessageListenerContainer container = new SimpleMessageListenerContainer(); container.setConnectionFactory(connectionFactory); container.setQueueNames(queueName); container.setMessageListener(listenerAdapter); return container; } @Bean MessageListenerAdapter listenerAdapter(Receiver receiver) { return new MessageListenerAdapter(receiver, "receiveMessage"); } public static void main(String[] args) { SpringApplication.run(SpringbootRabbitmqApplication.class, args); } }