Implement allocation-friendly method to get user count in SimpUserRegistry [SPR-14930]

[spring-projects-issues]

Christoph Dreis opened SPR-14930 and commented

Hey,

in my application I implemented a method to get the currently connected user count backed by the implementations of the SimpUserRegistry interface, which is used for monitoring purposes. Unfortunately, this involves creating a completely new HashSet every time.

What about an additional method to just get the user count in a more allocation-friendly manner? Much like Method.getParameterCount() in Java 8.

Attached you will find my proposal, but if I missed something feel free to adjust it accordingly.

Cheers,
Christoph

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Affects: 4.3.4

Reference URL: #1241

[spring-projects-issues]

Juergen Hoeller commented

Looks good to me :-)

[spring-projects-issues]

Christoph Dreis commented

Wow, that was fast. Thank you :)