Spring Integration: How to set up void outbound gateway methods

Question

I'm having a problem setting up a channel for a void gateway message:
For now, I'm getting a exception
Exception in thread "main" org.springframework.integration.support.channel.ChannelResolutionException: no output-channel or replyChannel header available

I have my outbound gateway setup like this:
channel-> transformer-> channel-> outbound-gateway I didn't set a reply channel for the outbound-gateway, just a request channel

Question: What is the right way to set up outbound system request when you're not waiting for a response (except fault messages)?

Answer 1

The simplest way to prevent any response is to use <outbound-channel-adapter> - one-way service-invoker. But I guess you use <int-ws:outbound-gateway> and there is no <outbound-channel-adapter> on the matter.

In this case you can just emulate the same using reply-channel="nullChannel".

It should be enough.