how to report the custom statistics data to ngrinder from the non worker thread

[randall]

Currently i am using ngrinder to perform test on application which is based on websocket connection. In my script i have a websocket client to send message, and the client have a onMessage method to receive the reponse asynchronize in another thread. i calc the latency from the message send to message receive in the websocket client and want to send it to ngrinder using follow statement:

grinder.statistics.registerSummaryExpression('Publish time delay', 'userLong0')
grinder.statstics.forCurrentTest.setLong('userLong0', 1234)

There is exception "Statistics interface is only supported for worker threads." throw out from ScriptStatisticsImplementation, because the thread to set statistics is not a worker thread and cannot get the threadcontext, is there any solution to fix this?

Thanks

[randall]

Grinder script gallery mention that all customized statistics should send from the worker thread. so they have sample to use queue to handle the async data.

refer to below:
http://grinder.sourceforge.net/g3/script-gallery.html