[Discuss] Future v/s Listener callback pattern within VerifyingMultiStreamBlobContainer

[kotwanikunal]

Is your feature request related to a problem? Please describe.

• Coming in from Add interface changes for async repository downloads #9182 (comment)

I think Future provides a reduction in a lot of boilerplate code as well as a native Java interface support, than relying on the listener mechanism, which predates complete support for async programming natively.
It also makes the code a lot for forward looking and compatible with any new features that come in with Future support.

I would like to open up a discussion on the benefits of Listener over Future used with the OpenSearch repository.

Additional context

• Add interface changes for async repository downloads #9182 (comment)