Search code examples
spring-integration

Why i can't put more than 1 setters of same argument type in class which implements genericHandler in dsl?

I have created a class implementing GenericHandler to use in .handle() method. I have setters for the class, but if i have more than 1 setter with same argument type, i am getting "Found Ambiguous parameter type".

Why there is such restriction?

Solution

  • That's just because ServiceActivatingHandler is based on the MessagingMethodInvokerHelper logic on background to determine the appropriate messaging method. And setters are candidate for that purpose. So, if you really hae several of them with the same param type, we end up with ambiguity issue.

    To fix your case, I suggest mark your Object handle(P payload, Map<String, Object> headers); implementation with @ServiceActivator.

    From other side I agree that it is not so good as we expect from Framework. So, feel free to raise a JIRA issue on the matter and we will fix .handle() to be more strict and rely only on the handle() method from the GenericHandler implementation.