WebSockets Next: introduce OpenConnections

[mkouba]

See https://quarkusio.zulipchat.com/#narrow/stream/187030-users/topic/websockets-next.3A.20more.20questions

CC @turing85

[gastaldi]

LGTM. I'd prefer to avoid the utility methods reusing the Stream since that can be done in the user's code, but that can be revisited in a later PR.

[mkouba]

LGTM. I'd prefer to avoid the utility methods reusing the Stream since that can be done in the user's code, but that can be revisited in a later PR.

Well, I think that one of our goals is to help users write less code and these are typical operations a user might need, so why not add these tiny methods? 🤷

Anyway, I've renamed the methods, made the OpenConnections extend Iterable<WebSocketConnection> and added findByEndpointId()... so hopefully it's good to go now 😉.

[quarkus-bot]

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