Hello Oliver,
no, I wanted to use several threads, each having an own transaction.
I just missed the fact that I can get several brokers from the
factory. It works fine now.
Btw, are there any resources about the ODMG standard available online
(beside the book referral on the odmg-website...) ?
Lasse
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Hello,
> -----Original Message-----
> From: Roland Carlsson [mailto:[EMAIL PROTECTED]
>
> the broker have tre methods to handles transactions..
>
> beginTransaction();
> broker.commitTransaction();
> broker.abortTransaction();
> > how can I use several (concurrent) transactions using the PB-API.
> > With the ODMG-API I do something like
> >
> > Transaction tx = odmg.newTransaction();
> > tx.begin();
> > ...
do you plan to have several transactions in the same thread?
In the ODMG standard, there is the concept of the "current
transaction"
of a given thread, i.e., there is an association between the threads
and transactions. For the sake of ODMG, it is advisable to have
one thread per one transaction and, conversely, one transactiob per
thread. (I am talking about concepts, I have not experiences
about what OJB does).
For the PersistenceBroker API, there is a similar association, but I
do
not know exactly what happens if several thread share one txn or vice
versa. So I would give the same advice.
Olli
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