[Zope] _finish and _abort not called in a TM subclass

[Marco Bizzarri]

Hi all.

I'm trying to figure out the proper way to use the Shared.DC.ZRDB.TM.TM 
mixin class. According to the documentation, I should derive from that 
class, redefine my _abort and _finish methods, and then call the 
_register method whenever it is needed.

I've created the following sample product, named CacheProduct. It has 
two methods which can be called from the web, registerFromWeb and 
resetMe. The first calls the _register, the second puts the 
self._registered variable to 0.

I've also added some prints, in order to check the results.

If all goes well, I should see something like:

before: 0
after: 1
_finish

However, if I use ab to do a check, like

ab -c 10 -n 1000 http://server:8080/CacheProduct/registerFromWeb

I can see:

_before: 1
_after: 1

which should never happen. Also, I don't see the required calls to 
_finish. After some request, the _finish reappers, only to disappear again.

Has anyone any suggestion on this topic?

Regards
Marco


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