Pulsar: Expose redeliverUnacknowledgedMessages(Set<MessageIdImpl> messageIds) in the public API

[jnioche]

See discussion on slack

Ideally, I'd love to be able set a delay for when the message(s) will be consumable again. I gather this is not currently possible, but would it be feasible at all or is there something in the architecture that would prevent adding such a feature?

[merlimat]

@jnioche Yes, I still agree we should expose this in public API, perhaps with a slightly different signature:

redeliverMessages(Collection<MessageId> messageIds)

[jnioche]

thanks @merlimat. What about being able to set a delay? Is that possible?

[ivankelly]

@jnioche could you summarize the slack conversation in the description here?

[ConcurrencyPractitioner]

@jnioche @sijie If you are alright with it, I could pick up this one.

[merlimat]

@ConcurrencyPractitioner I think this is in a way superceded by the negative acks feature in master. At this point I’d wait to see if there is still a gap to be filled, before adding one more API

[jiazhai]

currently negative acks feature is done, this is not blocked anymore. Anyone would like to contribute to this please feel free to comments on this issue.

[MarvinCai]

I think the feature requested for able to ask message(s) to be redelivered with certain delay is supported by this pr: https://github.com/apache/pulsar/pull/6449.
Can just close this one.

[jnioche]

Haven't checked the PR mentioned above but it looks like it does provide this functionality indeed. Thanks everyone