プロセッサモジュール内のSpring XDフィルタリング

Question

入力チャネルからのメッセージをフィルタリングし、出力上でそれらを他のものに変換するモジュールを作成したいとします。

@Filter(inputChannel = "input", outputChannel = "output") 
public boolean accept(final Message<?> message) { 
    final MyObject payload = (MyObject) message.getPayload(); 
    return payload.getName().equals("test"); 
} 


@Transformer(inputChannel = "input", outputChannel = "output") 
public OtherObject transform(final MyObject data) { 
    return convert(data); 
} 

が、私は単一のモジュールでこれを行うしたいと思います：私は、私のような二つのモジュール（私はスクリプトを超えるJavaコードを好む）でこれを区切ることができます知っています。フィルタリングロジックをtransfomerモジュールに移して、許容できないペイロードにnull値を返すと、私はspring-xdランタイム例外を取得し始めます。これに対する正しいアプローチは何でしょうか？

--EDIT--

構成：

@Configuration 
@EnableIntegration 
public class ModuleConfiguration { 

@Bean 
public MessageChannel input() { 
    return new DirectChannel(); 
} 

@Bean 
public MessageChannel output() { 
    return new DirectChannel(); 
} 

@Bean 
public MessageChannel myChannel() { 
    return new DirectChannel(); 
} 

@Bean 
public MyFilter filter() { 
    return new MyFilter(); 
} 

@Bean 
public MyTransformer transformer() { 
    return new MyTransformer(); 
} 
} 

フィルタ：

@Filter(inputChannel = "input", outputChannel = "myChannel") 
public boolean accept(final Message<?> message) 

トランスフォーマー：

@Transformer(inputChannel = "myChannel", outputChannel = "output") 
public OtherObject transform(final MyObject payload) 

例外：

2016-05-13T11:17:59+0200 1.3.1.RELEASE WARN xdbus.tt.0-1 listener.ConditionalRejectingErrorHandler - Execution of Rabbit message listener failed. 
org.springframework.amqp.rabbit.listener.exception.ListenerExecutionFailedException: Listener threw exception 
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.wrapToListenerExecutionFailedExceptionIfNeeded(AbstractMessageListenerContainer.java:865) ~[spring-rabbit-1.5.4.RELEASE.jar:na] 
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:760) ~[spring-rabbit-1.5.4.RELEASE.jar:na] 
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:680) ~[spring-rabbit-1.5.4.RELEASE.jar:na] 
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$001(SimpleMessageListenerContainer.java:93) [spring-rabbit-1.5.4.RELEASE.jar:na] 
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$1.invokeListener(SimpleMessageListenerContainer.java:183) ~[spring-rabbit-1.5.4.RELEASE.jar:na] 
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.invokeListener(SimpleMessageListenerContainer.java:1358) [spring-rabbit-1.5.4.RELEASE.jar:na] 
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.executeListener(AbstractMessageListenerContainer.java:661) ~[spring-rabbit-1.5.4.RELEASE.jar:na] 
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.doReceiveAndExecute(SimpleMessageListenerContainer.java:1102) [spring-rabbit-1.5.4.RELEASE.jar:na] 
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.receiveAndExecute(SimpleMessageListenerContainer.java:1086) [spring-rabbit-1.5.4.RELEASE.jar:na] 
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer.access$1100(SimpleMessageListenerContainer.java:93) [spring-rabbit-1.5.4.RELEASE.jar:na] 
    at org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer$AsyncMessageProcessingConsumer.run(SimpleMessageListenerContainer.java:1203) [spring-rabbit-1.5.4.RELEASE.jar:na] 
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_73] 
Caused by: org.springframework.messaging.MessageDeliveryException: Dispatcher has no subscribers for channel 'JavaConfiguredModule [name=myFilter, type=processor, group=tt, index=1 @7d48b140]:default,admin,singlenode,hsqldbServer:9393.input'.; nested exception is org.springframework.integration.MessageDispatchingException: Dispatcher has no subscribers 
    at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:81) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:442) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:392) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115) ~[spring-messaging-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45) ~[spring-messaging-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:105) ~[spring-messaging-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutput(AbstractMessageProducingHandler.java:231) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.handler.AbstractMessageProducingHandler.produceOutput(AbstractMessageProducingHandler.java:154) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.handler.AbstractMessageProducingHandler.sendOutputs(AbstractMessageProducingHandler.java:102) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:105) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:127) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.dispatcher.AbstractDispatcher.tryOptimizedDispatch(AbstractDispatcher.java:116) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:147) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:120) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:77) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:442) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.channel.AbstractMessageChannel.send(AbstractMessageChannel.java:392) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:115) ~[spring-messaging-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.messaging.core.GenericMessagingTemplate.doSend(GenericMessagingTemplate.java:45) ~[spring-messaging-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.messaging.core.AbstractMessageSendingTemplate.send(AbstractMessageSendingTemplate.java:105) ~[spring-messaging-4.2.4.RELEASE.jar:4.2.4.RELEASE] 
    at org.springframework.integration.endpoint.MessageProducerSupport.sendMessage(MessageProducerSupport.java:105) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.amqp.inbound.AmqpInboundChannelAdapter.access$400(AmqpInboundChannelAdapter.java:45) ~[spring-integration-amqp-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.amqp.inbound.AmqpInboundChannelAdapter$1.onMessage(AmqpInboundChannelAdapter.java:93) ~[spring-integration-amqp-4.2.5.RELEASE.jar:na] 
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:757) ~[spring-rabbit-1.5.4.RELEASE.jar:na] 
    ... 10 common frames omitted 
Caused by: org.springframework.integration.MessageDispatchingException: Dispatcher has no subscribers 
    at org.springframework.integration.dispatcher.UnicastingDispatcher.doDispatch(UnicastingDispatcher.java:153) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.dispatcher.UnicastingDispatcher.dispatch(UnicastingDispatcher.java:120) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    at org.springframework.integration.channel.AbstractSubscribableChannel.doSend(AbstractSubscribableChannel.java:77) ~[spring-integration-core-4.2.5.RELEASE.jar:na] 
    ... 33 common frames omitted 

Answer 1

あなたが見つけた通り、変圧器はを返す必要があります。

Spring Integration documentationを参照してください（各XDプロセッサモジュールは、入力と出力チャンネルを持つ小さなSpring Integrationアプリケーションです。ソースには出力があり、シンクには入力があります）。

あなたが今持っている方法では、inputに2人の消費者がいます。メッセージはラウンドロビン配信されます。あなたは、（第3のメッセージチャネルを介して）メッセージフローに二つの成分を配線する必要が

...

@Filter(inputChannel = "input", outputChannel = "transformerChannel") 
public boolean accept(final Message<?> message) { 
    final MyObject payload = (MyObject) message.getPayload(); 
    return payload.getName().equals("test"); 
} 


@Transformer(inputChannel = "transformerChannel", outputChannel = "output") 
public OtherObject transform(final MyObject data) { 
    return convert(data); 
} 

は、チャネル構成に注目してください。