Question

我正在建立一个经典的制作人-> Rabbitmq->消费者流。所有3个节点都在单独的jvm甚至单独的主机上运行

Producer是Spring Boot命令行运行器应用程序，有望在完成生产后停止。

Consumer应用程序是一个Spring Boot Web应用程序，它侦听3个Rabbitmq队列（2个持久队列绑定到一个直接交换，1个非持久队列绑定到一个扇出交换）

我的启动顺序如下： -启动rabbitmq -开始消费 -开始制作

生产者和消费者amqp依赖项mvn dependency:tree

[INFO] |  +- org.springframework.boot:spring-boot-starter-amqp:jar:2.1.6.RELEASE:compile
[INFO] |  |  +- org.springframework:spring-messaging:jar:5.1.8.RELEASE:compile
[INFO] |  |  \- org.springframework.amqp:spring-rabbit:jar:2.1.7.RELEASE:compile
[INFO] |  |     +- org.springframework.amqp:spring-amqp:jar:2.1.7.RELEASE:compile
[INFO] |  |     |  \- org.springframework.retry:spring-retry:jar:1.2.4.RELEASE:compile
[INFO] |  |     +- com.rabbitmq:amqp-client:jar:5.4.3:compile
[INFO] |  |     \- org.springframework:spring-tx:jar:5.1.8.RELEASE:compile

生产者代码

/**
 * @author louis.gueye@gmail.com
 */
@RequiredArgsConstructor
@Slf4j
public class PlatformBrokerExampleProducerJob implements CommandLineRunner {

    private final AmqpTemplate template;

    @Override
    public void run(String... args) {
        final Instant now = Instant.now();
        final Instant anHourAgo = now.minus(Duration.ofHours(1));
        final String directExchangeName = "careassist_queues";
        final String fanoutExchangeName = "careassist_schedules_topics";
        IntStream.range(0, 60).boxed().forEach(i -> {
            final SensorEventDto event = SensorEventDto.builder() //
                    .id(UUID.randomUUID().toString()) //
                    .businessId("sens-q7ikjxk1ftik") //
                    .timestamp(anHourAgo.plus(Duration.ofMinutes(i))) //
                    .state(SensorState.on) //
                    .build();
            final String routingKey = "care.events";
            template.convertAndSend(directExchangeName, routingKey, event);
            log.info(">>>>>>>>>>> Sent {} to exchange {} with routing key {}", event.getId(), directExchangeName, routingKey);
        });
        IntStream.range(0, 60).boxed().forEach(i -> {
            final SensorEventDto event = SensorEventDto.builder() //
                    .id(UUID.randomUUID().toString()) //
                    .businessId("sens-q7ikjxk1ftik") //
                    .timestamp(anHourAgo.plus(Duration.ofMinutes(i))) //
                    .state(SensorState.off) //
                    .build();
            final String routingKey = "maintenance.events";
            template.convertAndSend(directExchangeName, routingKey, event);
            log.info(">>>>>>>>>>> Sent {} to exchange {} with routing key {}", event.getId(), directExchangeName, routingKey);
        });
        IntStream.range(0, 60).boxed().forEach(i -> {
            final SensorEventDto event = SensorEventDto.builder() //
                    .id(UUID.randomUUID().toString()) //
                    .businessId("sens-q7ikjxk1ftik") //
                    .timestamp(anHourAgo.plus(Duration.ofMinutes(i))) //
                    .state(SensorState.off) //
                    .build();
            final ScheduleDto schedule = ScheduleDto.builder().id(UUID.randomUUID().toString()) //
                    .destination("any.routing.queue") //
                    .message(event) //
                    .timestamp(anHourAgo.plus(Duration.ofMinutes(i))) //
                    .build();
            final String routingKey = "#";
            template.convertAndSend(fanoutExchangeName, routingKey, schedule);
            log.info(">>>>>>>>>>> Sent {} to exchange {} with routing key {}", event.getId(), fanoutExchangeName, routingKey);
        });
    }
}

消费者代码（1个侦听器）

@Component
@RabbitListener(queues = {PlatformBrokerExampleCareEventsQueueConsumer.QUEUE_NAME})
@Slf4j
public class PlatformBrokerExampleCareEventsQueueConsumer {
    public static final String QUEUE_NAME = "care_events";
    @RabbitHandler
    public void onMessage(SensorEventDto event) {
        log.info("<<<<<<<<<<<< Received event [" + event + "] from {}...", PlatformBrokerExampleCareEventsQueueConsumer.QUEUE_NAME);
    }
}

我希望生产者先生产然后关机，但是Java进程会无限期挂起

任何有关生产者为何在产生其消息后不停止的解释将不胜感激。我怀疑它与spring-started-amqp有关，但不确定。我当然不需要装满的罐子，只需要装满AmqpTemplate

的罐子。

注意：消费者收到了所有消息

github project

谢谢您的帮助。

Answer 1

PlatformBrokerClientConfiguration绑定队列。但是我看不到任何地方可以关闭队列。这样也许就是挂起实例的原因。

请尝试这个。

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

Answer 2

AMQP客户端具有一些后台线程。

您应该更改main()方法，以便在运行程序返回后关闭应用程序上下文。

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

它将彻底关闭所有内容，因为它比System.exit()残酷得多。

Spring Boot独立CommandLineRunner将不会通过spring-starter-amqp返回

2 个答案: