eolivelli opened a new pull request, #15391:
URL: https://github.com/apache/pulsar/pull/15391
### Motivation
In some cases a Consumer will reject the processing of a message, and so
negative acknowledge it.
With this change you can emulate this behaviour and save resources by not
sending the Entry to the Consumer, but anticipating the "negative acknowledge".
### Modifications
- Allow the EntryFilter to access the Consumer who is going to receive the
message (add Consumer to FilterContext)
- Add a new FilterResult RESCHEDULE that means that the Filter wills to
schedule the message to "another consumer" or to post pone the processing of
the message
### Verifying this change
TODO: add tests
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