Re: Accessing StandardJMeterEngine.allThreads

On 13 August 2011 13:13, Andrey Pohilko <[email protected]> wrote:
> Hi all!
>
> JMeter users frequently ask for some inter-thread communications on JMeter
> forums.

JMeter threads represent independent users; it should not be necessary
to pass data between them.

JMeter 2.5 will support setUp threads, which solve many of the use
cases I have seen.

> I have an idea of custom function that would give information from any
> thread for another thread. I think this will give wanted interaction.

I'd like to see some use cases that truly require cross-thread
communication before considering this.
The danger is that the interaction between the threads will cause
unnecessary locking.

> The problem implementing it is that only place where all JMeterThreads stored
> is StandardJMeterEngine.allThreads and I found no way to access that list.
>
> Field declaration from StandardJMeterEngine:
>        /** JMeterThread => its JVM thread */
>        private final Map<JMeterThread, Thread> allThreads;
>
>  So my questions are:
> 1. Is it possible to get access to that map in some read-only way (not to
> break anything...)?
> 2. If yes, how better do it: simple getter, or something more required? I'm
> ready to create and submit a patch to Bugzilla.
> 3. If the way is simple enough, could it be the part of JMeter 2.5 release,
> because waiting another year for the next release is obviously undesirable?
>
> Sorry, if I'm asking for too much, but with my efforts, too, JMeter becoming
> more and more popular load testing tool.
>
> Thank you!
> --
> Andrey Pohilko
> JP@GC Maintainer
>
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