I am trying to implement the routing slip using spring integration, The configuration is as follows
@Bean
@Transformer(inputChannel = "inputChannel", outputChannel = "replyChannel")
public HeaderEnricher headerEnricher() {
return new HeaderEnricher(Collections.singletonMap(IntegrationMessageHeaderAccessor.ROUTING_SLIP,
new RoutingSlipHeaderValueMessageProcessor("channel1", "channel2", "channel3"
, "channel4"
)));
}
And
@Bean
public MessageChannel inputChannel() {
return new DirectChannel();
}
@Bean
@BridgeTo
public MessageChannel replyChannel() {
return new DirectChannel();
}
In order to consult the routing slip after header enricher I have added
@BridgeTo
This implementation works, but works once in 2 times, after debugging the spring code I stumbled into this code and figured out the problem.
In UnicastingDispatcher Class
private boolean doDispatch(Message<?> message) {
if (this.tryOptimizedDispatch(message)) {
return true;
}
boolean success = false;
Iterator<MessageHandler> handlerIterator = this.getHandlerIterator(message);
if (!handlerIterator.hasNext()) {
throw new MessageDispatchingException(message, "Dispatcher has no subscribers");
}
List<RuntimeException> exceptions = new ArrayList<RuntimeException>();
while (!success && handlerIterator.hasNext()) {
MessageHandler handler = handlerIterator.next();
try {
handler.handleMessage(message);
success = true; // we have a winner.
}
catch (Exception e) {
RuntimeException runtimeException = this.wrapExceptionIfNecessary(message, e);
exceptions.add(runtimeException);
this.handleExceptions(exceptions, message, !handlerIterator.hasNext());
}
}
return success;
}
Iterator<MessageHandler> handlerIterator = this.getHandlerIterator(message);
gives [org.springframework.integration.jms.JmsSendingMessageHandler#11, routingSlip.replyChannel.bridgeTo.handler]
And it is picking in round robin basis. So once it is picking the BridgeHandler and JmsSendingMessageHandler the next.
Is there any configuration I have missed to consult the BridgeHandler all the time?
