Message queue receive filter predicate

[yrashk]

I am interested to develop and contribute message queue predicate for filtering messages.

The use case is multiple consumers only some of which would be qualified/interested in consuming certain types of messages. Currently, I simulate this by requeueing the messages until it reaches the right consumer. This is obvious subefficient.

I wonder if there's any pre-existing notion of such functionality – and whether it would be of interest.

[yrashk]

@igaztanaga Hi Ion, pinging to see if there would be interest in such functionality?

[igaztanaga]

Reviewing old bugs. The feature seems interesting but it seems to me that it could not work with current message_queue philosophy (priority-based recepcion). Apart from the interface change, an efficient implementation probably would require a different implementation. Do you have something in mind to solve these issues?