[ZODB-Dev] listener on persistent objects

[heiko hees]

hi,
we seek to implement an application, which allows external apps to to 
receive events on object change (w/o ZEO).
since the Persistent-class already tracks object changes, we assume, 
there must be a hook to be notified if any object change occures. any 
hints on using this hook?

further we need to determin all parents (objects referencing) of a 
certain Persistent-instance. gc.get_referers([obj]) doesn´t seem to work.

and finally it would be great if we could access a Persistent-instance 
by OID.

any hints are welcome,
heiko

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