MaxConcurrency annotation

[smillidge]

Annotation to define max concurrency for access to a method or bean. This was first mooted on the EJB spec but adding to concurrency would mean this could be used generally across the platform.

See javaee/ejb-spec#9

Also see https://download.eclipse.org/microprofile/microprofile-fault-tolerance-2.1/apidocs/org/eclipse/microprofile/faulttolerance/Bulkhead.html

[smillidge]

If we have the new Async annotation I think we can have a very simple definition with just a single attribute for maxConcurrency and rely on Semaphore isolation. As the new Async annotation allows the developer to specify the specific ExecutorService which can be configured to have a maxAsync. Thread isolation can be acheived using the Async annotation and a ExecutorService with a configured maxAsync

[edburns]

Any word on getting this in for EE 11?

[smillidge]

it's tagged as a candidate for 3.1 which is the Jakarta EE 11 release. I don't think any work has been done yet though.