SpringBoot2.0應用（三）：SpringBoot2.0整合RabbitMQ

如何整合RabbitMQ

1、添加spring-boot-starter-amqp

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-amqp</artifactId>
		</dependency>

2、添加配置

spring.rabbitmq.host=localhost
spring.rabbitmq.port=5672
spring.rabbitmq.username=guest
spring.rabbitmq.password=guest
spring.rabbitmq.publisher-confirms=true
spring.rabbitmq.dynamic=true
spring.rabbitmq.cache.connection.mode=channel

3、注入隊列

@Configuration
public class RabbitConfig {
    @Bean
    public Queue Queue() {
        return new Queue("hello");
    }
}

4、創建操作數據的Repository對象

interface CityRepository extends Repository<City, Long> {

	Page<City> findAll(Pageable pageable);

	Page<City> findByNameContainingAndCountryContainingAllIgnoringCase(String name,
			String country, Pageable pageable);

	City findByNameAndCountryAllIgnoringCase(String name, String country);

}

5、創建消費者

@Component
public class RabbitConsumer {
    @RabbitHandler
    @RabbitListener(queues = "hello")
    public void process(@Payload String foo) {
        System.out.println(new Date() + ": " + foo);
    }
}

6、啟動主類

@SpringBootApplication
@EnableScheduling
public class AmqpApplication {
    public static void main(String[] args) {
        SpringApplication.run(AmqpApplication.class, args);
    }
}

控制台輸出：

Sun Sep 30 16:30:35 CST 2018: hello

到此，一個簡單的SpringBoot2.0集成RabbitMQ就完成了。
熟悉RabbitMQ的小伙伴們應該知道，RabbitMQ在一般的隊列基礎上，增加了ExChange的概念。ExChange有四種類型：Direct, Topic, Headers and Fanout。其中Headers實際很少使用，Direct較為簡單。接下來將詳細介紹如何使用topic和Fanout。

Topic Exchange

1、配置Topic規則

@Configuration
public class TopicRabbitConfig {

    @Bean
    public Queue queueMessage1() {
        return new Queue(MQConst.TOPIC_QUEUENAME1);
    }

    @Bean
    public Queue queueMessage2() {
        return new Queue(MQConst.TOPIC_QUEUENAME2);
    }

    @Bean
    TopicExchange exchange() {
        return new TopicExchange(MQConst.TOPIC_EXCHANGE);
    }

    @Bean
    Binding bindingExchangeMessage(Queue queueMessage1, TopicExchange exchange) {
        // 將隊列1綁定到名為topicKey.A的routingKey
        return BindingBuilder.bind(queueMessage1).to(exchange).with(MQConst.TOPIC_KEY1);
    }

    @Bean
    Binding bindingExchangeMessages(Queue queueMessage2, TopicExchange exchange) {
        // 將隊列2綁定到所有topicKey.開頭的routingKey
        return BindingBuilder.bind(queueMessage2).to(exchange).with(MQConst.TOPIC_KEYS);
    }
}

2、配置消費者

@Component
public class TopicConsumer {

    @RabbitListener(queues = MQConst.TOPIC_QUEUENAME1)
    @RabbitHandler
    public void process1(String message) {
        System.out.println("queue:topic.message1,message:" + message);
    }

    @RabbitListener(queues = MQConst.TOPIC_QUEUENAME2)
    @RabbitHandler
    public void process2(String message) {
        System.out.println("queue:topic.message2,message:" + message);
    }
}

3、生產消息

在Producer類中添加：

        // Topic
        rabbitTemplate.convertAndSend(MQConst.TOPIC_EXCHANGE, MQConst.TOPIC_KEYS, "from keys");
        rabbitTemplate.convertAndSend(MQConst.TOPIC_EXCHANGE, MQConst.TOPIC_KEY1, "from key1");

再次啟動主類，控制台輸出：

queue:topic.message2,message:from keys
queue:topic.message1,message:from key1
queue:topic.message2,message:from key1

Fanout Exchange

1、配置Fanout規則

@Configuration
public class FanoutRabbitConfig {
    @Bean
    public Queue MessageA() {
        return new Queue(MQConst.FANOUT_QUEUENAME1);
    }

    @Bean
    public Queue MessageB() {
        return new Queue(MQConst.FANOUT_QUEUENAME2);
    }

    @Bean
    FanoutExchange fanoutExchange() {
        return new FanoutExchange(MQConst.FANOUT_EXCHANGE);
    }

    @Bean
    Binding bindingExchangeA(Queue MessageA, FanoutExchange fanoutExchange) {
        return BindingBuilder.bind(MessageA).to(fanoutExchange);
    }

    @Bean
    Binding bindingExchangeB(Queue MessageB, FanoutExchange fanoutExchange) {
        return BindingBuilder.bind(MessageB).to(fanoutExchange);
    }
}

2.配置消費者

@Component
public class FanoutConsumer {

    @RabbitListener(queues = MQConst.FANOUT_QUEUENAME1)
    @RabbitHandler
    public void process1(String message) {
        System.out.println("queue:fanout.message1,message:" + message);
    }

    @RabbitListener(queues = MQConst.FANOUT_QUEUENAME2)
    @RabbitHandler
    public void process2(String message) {
        System.out.println("queue:fanout.message2,message:" + message);
    }
}

3、生產消息

在Producer類中添加：

        // FanOut
        rabbitTemplate.convertAndSend(MQConst.FANOUT_EXCHANGE, "", "fanout"); 

再次啟動主類，控制台輸出：

queue:fanout.message2,message:fanout
queue:fanout.message1,message:fanout

源碼地址：GitHub

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