Consider how to support spring.integration.keep-alive

[philwebb]

Spring Integration is introducing a new spring.integration.keep-alive property which will create a keep-alive thread based on this logic. We could surface this property in Spring Boot, however, we already have spring.main.keep-alive.

We need to consider what we should do by default, specifically:

• If spring.main.keep-alive is true then there is no need to Spring Integration to create a thread
• If spring.main.keep-alive is missing then standard Spring Integration logic should apply
• If spring.main.keep-aliveis false we may need to also disable Spring Integration keep alive
• If we don't do the above, we need to offer a way to turn off Spring Integration keep alive threads

[philwebb]

See https://github.com/spring-projects/spring-integration/issues/9455 for the original request. We need some more time to consider our options portfolio wide so we'll need to look at this after 3.4

[mhalbritter]

This feature has been introduced in https://github.com/spring-projects/spring-integration/pull/9493, but then has been reverted in https://github.com/spring-projects/spring-integration/commit/2cf2f109f97e23f7af9dc07f14e6b701d6da1018.

I couldn't find the keep alive feature on their main branch, so I think it's gone for good.

@artembilan is that assumption correct?

[artembilan]

That's correct, @mhalbritter . The feature was introduced and I tried to incorporate it into Spring Boot. But in the end we decided with @philwebb to revert it in favor of existing in Spring Boot and idea to come up with some more general solution.

Not sure where we are, but this issue is still opened: https://github.com/spring-projects/spring-integration/issues/9455.

[mhalbritter]

Thanks! I'll close this issue then.