Subscribe the same channel name with more than one callback

[jarkt]

Currently the class Thruway\Role\Subscriber ignores the fact that it can be legitimate to subscribe the same channel multiple times.
https://github.com/voryx/Thruway/blob/master/src/Thruway/Role/Subscriber.php#L164

[davidwdan]

@jarkt are you trying to register multiple RPCs with the same URI?

[jarkt]

Sorry bad wording, I meant subscriptions.

[mbonneau]

@jarkt - are you using crossbar?

[jarkt]

Yes

[mbonneau]

@jarkt - There is an issue open here wamp-proto/wamp-proto#142 (comment)

Crossbar returns an identical subscription id if the subscription is exactly the same as an existing subscription. The Subscriber role does not currently handle this.

I will ask for clarification on the spec before figuring out which way to proceed.

[mbonneau]

@jarkt - After rereading the crossbar issue, it looks like thruway should be updated to handle multiple subscriptions returning the same ids and should have an internal counter that unsubscribes when it gets down to zero.