Missing Exchange to Exchange binding API

[cambierr]

The library is great but lacks a major feature which is Exchange to Exchange bindings

Motivation

For the project I'm currently working on, I need to setup multiple exchanges binding with an exchange-to-exchange topology.

My use cases is that events are published no a lot of different exchanges (one by event type) and we have a single sharded exchange to should receive a copy of messages going through all the other to permit a sharded processing (see x-consistent-hash plugin)

Desired solution

Duplicate the BindingSpecification to ExchangeBindingSpecification and QueueBindingSpecification, deprecate the existing one and duplicate the Sender.bind(...) to get two implementations depending of the incoming specification type

Considered alternatives

The only way (for now) is to use the direct rabbitmq channels which removes a significant part of the benefits generated by this library

Additional context

N/A

[acogoluegnes]

This is certainly doable.

I was thinking we could expand BindingSpecification with a new property (could be exchangeTo, and there could be also exchangeFrom, the latter being just an alias of exchange). WDYT?

[cambierr]

LGTM. I actually can even write a PR tomorrow

[acogoluegnes]

LGTM. I actually can even write a PR tomorrow

Great, thanks, you're welcome to contribute a PR.

[acogoluegnes]

@cambierr Are still planning to write a PR for this one or should I handle it?

[cambierr]

Sadly, I won't be able to do it before one or two weeks because of unexpected work loads...
So it's probably better if you can do it so that other people looking at this can benefit from it ASAP.

[acogoluegnes]

@cambierr I created a PR with the exchange-to-exchange binding feature if you want to take a look before I merge it.

[cambierr]

Great !! thank you :-)