cayenne-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Tore Halset <>
Subject Re: Non-blocking DataRowStore - need help to test
Date Wed, 22 Feb 2012 19:18:31 GMT
Wow, thanks a lot! Looking forward to test and use this!

 - Tore.

On Feb 22, 2012, at 19:54, Andrus Adamchik <> wrote:

> Here is a potentially disruptive change to Cayenne core:
> (also see )
> This removes the major global lock and has a potential to significantly increase throughput
(which is an issue, see CAY-1124 by Tore for instance). The implementation is based on a previously
untried by us data structure - ConcurrentLinkedHashMap -
. It is used by Apache Cassandra, so presumably it works and can handle the load. I internalized
this code, placing it under org.apache.cayenne.util.concurrentlinkedhashmap.
> I need help with testing though... Maybe someone has any kind of load tests that can
emulate multiple DataContexts attached to a single ServerRuntime and performing various select/modify
operations? Or maybe you are daring enough to place this in production? I will do the same
on my end.
> To give some reassurance, our single-threaded unit tests pass 100% with no changes after
I swapped commons-collections LRUMap to ConcurrentLinkedHashMap. 
> Appreciate feedback on this feature!
> Thanks,
> Andrus

View raw message