Timeouts and GatewayProxyFactoryBean

[EdenAEL20]

Can the GatewayProxyFactoryBean return a null response if the request timed out? Similar to the MessageChannelTemplate. Before the response message gets to the responseChannel I have a interceptor which checks if the message is valid or not, and if its invalid I have it return null to prevent further processing. I then expect the responseChannel to time out if the interceptor has prevented the further processing and the gateway to return null. Am I doing this correctly?


Message<?> response = gateway.sendMessage(request);
can the message payload here ever be null here?



<gateway id="InBoundGateway"
service-interface="com.ml.bti.cmcentral.messagebus.iProces sMessageGateway"
default-request-channel="requestChannel"
default-reply-channel="responseChannel"
default-reply-timeout="1000"
/>

[EdenAEL20]

I tried it with the MessageChannelTemplate also I am not receiving any null. It looks like it just stops the thread after interceptor returns null. I'm guessing this isn't the way I should be doing this. I want the interceptor to decide if a message needs to be delivered else return null. so the sender will know it didnt go through. Should I be using a filter instead? I think it basically uses the same logic. Any suggestions please?

[Mark Fisher]

In general, the Filter sounds like a better solution for Message validation. Another option might be to have your channel interceptor throw an Exception. I guess you want to avoid that and just have a null return in either case: invalid message or no message available. There is no need to make a distinction in your app?