Make @Payload as ElementType.METHOD too [SPR-12071]

[spring-projects-issues]

Artem Bilan opened SPR-12071 and commented

Since Spring Integration is based on Spring Messaging there is no reason to have duplications of the same annotations.
@Header can be supported as is, but @Payload in Spring Integration can be configured on method level to be applied for the return value in case of @Publisher, or for <gateway>'s interface methods without arguments.

We are going to deprecate those annotations in the SI and just rely on these Messaging annotations, but to have more smooth migration we have to avoid breaking changes.

That's why we need this improvement now.

Thanks in advance

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Issue Links:

• INT-3492 Deprecate @Payload and @Header and rely on similar annotations from the Spring Messaging ("is depended on by")

Referenced from: commits e010309

[spring-projects-issues]

Gary Russell commented

Given that this annotation is (now) not only used for MessageHandlers but also for messaging gateways in Spring Integration, it would probably have made sense to move it to a more general package instead of handler.

If everyone agrees, I can open a new JIRA for 4.2.

[spring-projects-issues]

Artem Bilan commented

Actually the is up to @Header and @Headers and @MessageMapping, since we can use it on the Gateway level as well.

[spring-projects-issues]

Juergen Hoeller commented

We don't really have messaging annotations in any more general package, so I'd rather leave them in handler and reuse them from there without worrying too much about the name of the package...

Juergen

[spring-projects-issues]

Gary Russell commented

Fine with me; I just thought I should raise awareness that these annotations are now used (at least in SI) when creating messages, not just consuming (handling) them.