Number of websockets currently opened

[Florian Pradines]

Hi,

I wonder, if there is a native way to know how many websockets are opened at a given instant?

Thanks,

[Will Sargent]

That's an interesting question.  You can count the number of active streams that you get out, and expose that as a metric:

https://doc.akka.io/docs/akka/2.5.3/scala/stream/stream-cookbook.html#globally-limiting-the-rate-of-a-set-of-streams

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[Igmar Palsenberg]

I wonder, if there is a native way to know how many websockets are opened at a given instant?

Not out of the box, no. I created an Actor per JVM that received a message when the webstream actor was created, and another message on when it terminated.
Not sure how to handle this when using streams however.

Igmar 

[Florian Pradines]

Thanks for all of your answers. I finally used the same method as Igmar but with an AtomicInteger to keep the count.