> This is what I wanted to hear. I don't care about
> only one thread, I am just
> concerned about having only one running thread.
> 
> I am adding an application level transaction data
> private to the cmp plugin,
> so I need to know if I need to synchronize access to
> the tx data. This is
> similar to thread local except it is tx local.
> 

I am sorry I hadn't read your original post clearly (the second part).

The way the container works from the "Scheduler" on down is that you always only have 
one thread at a time calling the bean, that is spec requirement, you can have 
reentrancy if you are associated with the same transaction though, you still wait for 
your turn to call the bean (and teh cmp engine) but at least you know you wait to go 
in.

marcf

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