SpringBoot应用之消息队列

codecraft
SpringBoot应用系列文章

本文主要讲如何在Spring Boot里头使用rabbitmq进行消息收发。

准备rabbitmq集群

具体查看docker搭建rabbitmq集群这篇文章。

新建项目

图片描述

配置项

#http://segmentfault.com/a/1190000004309900
spring.rabbitmq.host=192.168.99.100
spring.rabbitmq.port=5672
spring.rabbitmq.username=guest
spring.rabbitmq.password=guest
spring.rabbitmq.virtual-host=/

logging.level.org.springframework.amqp=ERROR
logging.level.com.demo=INFO

#spring.rabbitmq.dynamic 是否创建AmqpAdmin bean. 默认为: true
#spring.rabbitmq.listener.acknowledge-mode 指定Acknowledge的模式.
#spring.rabbitmq.listener.auto-startup 是否在启动时就启动mq,默认: true
#spring.rabbitmq.listener.concurrency 指定最小的消费者数量.
#spring.rabbitmq.listener.max-concurrency 指定最大的消费者数量.
#spring.rabbitmq.listener.prefetch 指定一个请求能处理多少个消息,如果有事务的话,必须大于等于transaction数量.
#spring.rabbitmq.listener.transaction-size 指定一个事务处理的消息数量,最好是小于等于prefetch的数量.
#spring.rabbitmq.requested-heartbeat 指定心跳超时,0为不指定.
#spring.rabbitmq.ssl.enabled 是否开始SSL,默认: false
#spring.rabbitmq.ssl.key-store 指定持有SSL certificate的key store的路径
#spring.rabbitmq.ssl.key-store-password 指定访问key store的密码.
#spring.rabbitmq.ssl.trust-store 指定持有SSL certificates的Trust store.
#spring.rabbitmq.ssl.trust-store-password 指定访问trust store的密码.

生产者配置

@Configuration
public class ProducerConfig {

    @Bean
    RabbitAdmin rabbitAdmin(ConnectionFactory connectionFactory) {
        return new RabbitAdmin(connectionFactory);
    }

    @Bean
    Queue queueFoo(RabbitAdmin rabbitAdmin) {
        Queue queue = new Queue("queue.foo", true);
        rabbitAdmin.declareQueue(queue);
        return queue;
    }

    @Bean
    Queue queueBar(RabbitAdmin rabbitAdmin) {
        Queue queue = new Queue("queue.bar", true);
        rabbitAdmin.declareQueue(queue);
        return queue;
    }

    @Bean
    TopicExchange exchange(RabbitAdmin rabbitAdmin) {
        TopicExchange topicExchange = new TopicExchange("exchange");
        rabbitAdmin.declareExchange(topicExchange);
        return topicExchange;
    }

    @Bean
    Binding bindingExchangeFoo(Queue queueFoo, TopicExchange exchange,RabbitAdmin rabbitAdmin) {
        Binding binding = BindingBuilder.bind(queueFoo).to(exchange).with("queue.foo");
        rabbitAdmin.declareBinding(binding);
        return binding;
    }

    @Bean
    Binding bindingExchangeBar(Queue queueBar, TopicExchange exchange,RabbitAdmin rabbitAdmin) {
        Binding binding = BindingBuilder.bind(queueBar).to(exchange).with("queue.bar");
        rabbitAdmin.declareBinding(binding);
        return binding;
    }



    /**
     * 生产者用
     * @return
     */
    @Bean
    public RabbitMessagingTemplate rabbitMessagingTemplate(RabbitTemplate rabbitTemplate) {
        RabbitMessagingTemplate rabbitMessagingTemplate = new RabbitMessagingTemplate();
        rabbitMessagingTemplate.setMessageConverter(jackson2Converter());
        rabbitMessagingTemplate.setRabbitTemplate(rabbitTemplate);
        return rabbitMessagingTemplate;
    }

    @Bean
    public MappingJackson2MessageConverter jackson2Converter() {
        MappingJackson2MessageConverter converter = new MappingJackson2MessageConverter();
        return converter;
    }
}

消费者配置

@Configuration
@EnableRabbit
public class ConsumerConfig implements RabbitListenerConfigurer {

    @Autowired
    ReceiverService receiverService;

    @Bean
    public DefaultMessageHandlerMethodFactory myHandlerMethodFactory() {
        DefaultMessageHandlerMethodFactory factory = new DefaultMessageHandlerMethodFactory();
        factory.setMessageConverter(new MappingJackson2MessageConverter());
        return factory;
    }

    @Bean
    public SimpleRabbitListenerContainerFactory rabbitListenerContainerFactory(ConnectionFactory connectionFactory) {
        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
        factory.setConnectionFactory(connectionFactory);
        // factory.setPrefetchCount(5);
         factory.setAcknowledgeMode(AcknowledgeMode.AUTO);
        return factory;
    }

    @Override
    public void configureRabbitListeners(RabbitListenerEndpointRegistrar registrar) {
        registrar.setMessageHandlerMethodFactory(myHandlerMethodFactory());
    }

}

消息收发

发送服务

@Component
public class SenderService {

    @Autowired
    private RabbitMessagingTemplate rabbitMessagingTemplate;

    public void sendFoo2Rabbitmq(final Foo foo) {
        this.rabbitMessagingTemplate.convertAndSend("exchange", "queue.foo", foo);
    }

    public void sendBar2Rabbitmq(final Bar bar){
        this.rabbitMessagingTemplate.convertAndSend("exchange", "queue.bar", bar);
    }
}

调用

@SpringBootApplication
@ComponentScan(basePackages = "com.demo")
public class RabbitmqdemoApplication implements CommandLineRunner {

    public static void main(String[] args) {
        SpringApplication.run(RabbitmqdemoApplication.class, args);
    }

    @Autowired
    SenderService senderService;

    @Override
    public void run(String... strings) throws Exception {
        Random random = new Random();
        while (true){
            senderService.sendBar2Rabbitmq(new Bar(random.nextInt()));
            senderService.sendFoo2Rabbitmq(new Foo(UUID.randomUUID().toString()));
        }
    }
}

接收

@Component
public class ReceiverService {

    @RabbitListener(queues = "queue.foo")
    public void receiveFooQueue(Foo foo) {
        System.out.println("Received Foo<" + foo.getName() + ">");
    }

    @RabbitListener(queues = "queue.bar")
    public void receiveBarQueue(Bar bar) {
        System.out.println("Received Bar<" + bar.getAge() + ">");
    }
}

查看输出

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v1.3.2.RELEASE)

2016-02-02 02:26:07.099  INFO 2185 --- [           main] com.demo.RabbitmqdemoApplication   : Starting RabbitmqdemoApplication on Jupiter.local with PID 2185 (/Users/codecraft/workspace/rabbitmqdemo/target/classes started by codecraft in /Users/codecraft/workspace/rabbitmqdemo)
2016-02-02 02:26:07.101  INFO 2185 --- [           main] com.demo.RabbitmqdemoApplication   : No active profile set, falling back to default profiles: default
2016-02-02 02:26:07.166  INFO 2185 --- [           main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@15b3e5b: startup date [Tue Feb 02 02:26:07 CST 2016]; root of context hierarchy
2016-02-02 02:26:08.004  INFO 2185 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.amqp.rabbit.annotation.RabbitBootstrapConfiguration' of type [class org.springframework.amqp.rabbit.annotation.RabbitBootstrapConfiguration$$EnhancerBySpringCGLIB$$d94c0656] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2016-02-02 02:26:08.976  INFO 2185 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2016-02-02 02:26:08.981  INFO 2185 --- [           main] o.s.c.support.DefaultLifecycleProcessor  : Starting beans in phase -2147482648
2016-02-02 02:26:08.981  INFO 2185 --- [           main] o.s.c.support.DefaultLifecycleProcessor  : Starting beans in phase 0
2016-02-02 02:26:09.029  INFO 2185 --- [           main] o.s.c.support.DefaultLifecycleProcessor  : Starting beans in phase 2147483647
Received Foo<062226b0-cc27-433c-8ba9-201379f2d7c4>
Received Bar<-1717186171>
Received Foo<b2ac3cb9-2dfd-4bf1-8975-06aaca270096>
Received Bar<1094787449>
Received Foo<d63160f5-f919-4122-a995-185edcb6c231>
Received Bar<-39441298>
Received Foo<235369f1-0b59-4c4f-9a51-2277f3179798>
Received Bar<-596340646>
Received Foo<ef6e596c-b088-4b83-8b5c-e78e7ceaabcd>
Received Bar<-915839285>
Received Foo<17fb113a-8845-473a-9f46-f850526f6f4d>
Received Bar<-75651721>
Received Foo<d796bb56-478a-41e8-a2ed-b5944ae01642>
Received Bar<-1210351662>
Received Foo<23700d4a-26f9-4280-836d-9f6d63c0a3a0>
Received Bar<-2096776841>
Received Foo<d10c28d7-2c75-4b7d-b51b-992b98101018>
Received Bar<-1986644405>

查看rabbitmq界面

图片描述

查看队列

图片描述
这里是启动了两个实例,两个接收者,加上prefecth设置为5,所以待ack的保持在2*2*5=20
图片描述

查看channel

图片描述

查看连接

图片描述

MimeType的warning

2016-02-02 02:19:04.444  WARN 2168 --- [           main] o.s.amqp.support.SimpleAmqpHeaderMapper  : skipping header 'contentType' since it is not of expected type [org.springframework.util.MimeType]

找到的出处DefaultAmqpHeaderMapper should accept contentType headers containing org.springframework.util.MimeType

没有解决,目前是把amqp的log调整到error.

declare事项

为了方便自动化处理,可以在代码里头去declare queue、topic、exchange,最后注意declare binding,否则就接受不到消息。

参考

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