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[英]Stop Spring Cloud Stream @StreamListener from listening until receipt of some Spring Event
[英]Spring Cloud Stream: @StreamListener processing messages twice
我在Spring Boot(1.5.10.RELEASE)中使用Spring Cloud Stream(Edgware.SR5)。 我的@StreamListener正在处理收到的每条消息两次。
该示例的思想是将消息发布到队列中并对其进行处理。
服务:
@EnableBinding(ExampleBindings.class)
@Service
public class ExampleService {
@Publisher(channel = ExampleBindings.OUTPUT)
public String queue(String message){
return message;
}
@StreamListener(ExampleBindings.INPUT)
public void dequeue(String message){
System.out.println("New message: " + message);
}
}
绑定:
public interface ExampleBindings {
String INPUT = "input1";
String OUTPUT = "output1";
@Input(ExampleBindings.INPUT)
SubscribableChannel input();
@Output(ExampleBindings.OUTPUT)
MessageChannel output();
}
application.properties:
spring.cloud.stream.default.group=group1
spring.cloud.stream.default.binder=binder1
spring.cloud.stream.bindings.input1.destination=dest_1
spring.cloud.stream.bindings.output1.destination=dest_1
spring.cloud.stream.binders.binder1.type=rabbit
spring.cloud.stream.binders.binder1.environment.spring.rabbitmq.host=localhost
配置(用于在测试中注入代理服务):
@Configuration
public class ExampleConfig {
@Bean
public PublisherAnnotationBeanPostProcessor publisherAnnotationBeanPostProcessor(){
PublisherAnnotationBeanPostProcessor publisherAnnotationBeanPostProcessor =
new PublisherAnnotationBeanPostProcessor();
publisherAnnotationBeanPostProcessor.setProxyTargetClass(true);
return publisherAnnotationBeanPostProcessor;
}
}
测试:
@RunWith(SpringRunner.class)
@SpringBootTest
public class ExampleServiceTest {
@Autowired
private ExampleService exampleService;
@Test
public void testQueue() throws InterruptedException {
exampleService.queue("Hello!");
Thread.sleep(1000);//Wait for message processing
System.out.println("Ready!");
}
}
我有以下输出:
17:19:10.230 [dest1.group1-2] DEBUG o.s.c.s.b.StreamListenerMessageHandler - org.springframework.cloud.stream.binding.StreamListenerMessageHandler@575c3e9b received message: GenericMessage [payload=Hello!, headers={amqp_receivedDeliveryMode=PERSISTENT, amqp_receivedRoutingKey=dest1, amqp_receivedExchange=dest1, amqp_deliveryTag=1, amqp_consumerQueue=dest1.group1, amqp_redelivered=false, id=2f22ce16-bb5a-350c-8b3d-e6c898760888, amqp_consumerTag=amq.ctag-sxu6zQHJTGrsazfwbmol9Q, contentType=text/plain, timestamp=1547583550230}]
New message: Hello!
17:19:10.231 [dest1.group1-1] DEBUG o.s.c.s.b.StreamListenerMessageHandler - handler 'org.springframework.cloud.stream.binding.StreamListenerMessageHandler@575c3e9b' produced no reply for request Message: GenericMessage [payload=Hello!, headers={amqp_receivedDeliveryMode=PERSISTENT, amqp_receivedRoutingKey=dest1, amqp_receivedExchange=dest1, amqp_deliveryTag=1, amqp_consumerQueue=dest1.group1, amqp_redelivered=false, id=788e8bbf-4ae4-86cc-0859-d4f153cb5807, amqp_consumerTag=amq.ctag-fV0aaDzYUZfq08JsODq6pA, contentType=text/plain, timestamp=1547583550230}]
17:19:10.231 [dest1.group1-1] DEBUG o.s.i.channel.DirectChannel - postSend (sent=true) on channel 'input1', message: GenericMessage [payload=Hello!, headers={amqp_receivedDeliveryMode=PERSISTENT, amqp_receivedRoutingKey=dest1, amqp_receivedExchange=dest1, amqp_deliveryTag=1, amqp_consumerQueue=dest1.group1, amqp_redelivered=false, id=788e8bbf-4ae4-86cc-0859-d4f153cb5807, amqp_consumerTag=amq.ctag-fV0aaDzYUZfq08JsODq6pA, contentType=text/plain, timestamp=1547583550230}]
New message: Hello!
17:19:10.232 [dest1.group1-2] DEBUG o.s.c.s.b.StreamListenerMessageHandler - handler 'org.springframework.cloud.stream.binding.StreamListenerMessageHandler@575c3e9b' produced no reply for request Message: GenericMessage [payload=Hello!, headers={amqp_receivedDeliveryMode=PERSISTENT, amqp_receivedRoutingKey=dest1, amqp_receivedExchange=dest1, amqp_deliveryTag=1, amqp_consumerQueue=dest1.group1, amqp_redelivered=false, id=2f22ce16-bb5a-350c-8b3d-e6c898760888, amqp_consumerTag=amq.ctag-sxu6zQHJTGrsazfwbmol9Q, contentType=text/plain, timestamp=1547583550230}]
17:19:10.232 [dest1.group1-2] DEBUG o.s.i.channel.DirectChannel - postSend (sent=true) on channel 'input1', message: GenericMessage [payload=Hello!, headers={amqp_receivedDeliveryMode=PERSISTENT, amqp_receivedRoutingKey=dest1, amqp_receivedExchange=dest1, amqp_deliveryTag=1, amqp_consumerQueue=dest1.group1, amqp_redelivered=false, id=2f22ce16-bb5a-350c-8b3d-e6c898760888, amqp_consumerTag=amq.ctag-sxu6zQHJTGrsazfwbmol9Q, contentType=text/plain, timestamp=1547583550230}]
Ready!
我无法弄清楚我的配置有什么问题,或者如果有错误,有什么建议吗?
谢谢!
编辑:
我在这里上传了一个(非)工作示例
您可以使用以下方法创建RabbitMQ实例:
docker run -p 5672:5672 -p 15672:15672 rabbitmq:3-management
我检测到@Publisher由于ExampleConfig中的配置而发布了两次。 这个新配置(从此处借用)似乎可以正常工作:
@Bean
public static BeanFactoryPostProcessor bfpp() {
return bf -> bf.getBean(IntegrationContextUtils.PUBLISHER_ANNOTATION_POSTPROCESSOR_NAME,
PublisherAnnotationBeanPostProcessor.class).setProxyTargetClass(true);
}
我在调试模式(intellij)下运行我的应用程序,由于该原因,偏移量未得到更新。 尝试在运行模式下运行,它解决了我的问题。
我认为,从配置中,您尝试将同一条消息再次发布到相同的目标dest_1
。
spring.cloud.stream.bindings.input1.destination=dest_1
spring.cloud.stream.bindings.output1.destination=dest_1
从日志中可以明显看出,第二条消息具有不同的ID
id=788e8bbf-4ae4-86cc-0859-d4f153cb5807
id=2f22ce16-bb5a-350c-8b3d-e6c898760888
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