多个通道发送到带有spring集成注释的单个通道

Question

如何在不使用XML的情况下将2个通道输出到具有Spring集成的单个通道。类似于以下问题多通道的消息进入单通道

在我的上下文中，我有2个PollableChannel bean，我希望将消息从这两个bean（非聚合）路由到一个@ServiceActivator，即完成如下操作：

@Bean("Channel1") PollableChannel c1() {...}
@Bean("Channel2") PollableChannel c2() {...}

?? How to interleave/combine Channel1 and Channel2 into a single channel

...
@ServiceActivator(inputChannel = "Channel1and2")
void handle(msg: MyMessage) {...}

Answer 1

@Bean("Channel1") 
@BridgeTo("Channel1and2")
PollableChannel c1() {...}

@Bean("Channel2") 
@BridgeTo("Channel1and2")
PollableChannel c2() {...}

请注意te BridgeTo注释。从其JavaDocs：

* Messaging Annotation to mark a {@link org.springframework.context.annotation.Bean}
* method for a {@link org.springframework.messaging.MessageChannel} to produce a
* {@link org.springframework.integration.handler.BridgeHandler} and Consumer Endpoint.
* <p>
* The {@link org.springframework.messaging.MessageChannel} {@link org.springframework.context.annotation.Bean}
* marked with this annotation is used as the {@code inputChannel} for the
* {@link org.springframework.integration.endpoint.AbstractEndpoint}
* and determines the type of endpoint -
* {@link org.springframework.integration.endpoint.EventDrivenConsumer} or
* {@link org.springframework.integration.endpoint.PollingConsumer}.

您还可以考虑在该桥上使用轮询器，因为您的输入通道是可轮询通道。

关于该事项的参考手册：http://docs.spring.io/spring-integration/docs/latest-ga/reference/html/configuration.html#_creating_a_bridge_with_annotations