AW: [OJB-developers] Some PersistenceBrokerImpl questions

[Mahler T. <tho...@it...>]

Hi Daniel,

> Hi Thomas.
> 
> I have some questions about PersistenceBrokerImpl, as you 
> know I'm working on JTA support for OJB, I have started with 
> the PersistenceBroker interface, and then if everything goes 
> fine will take a look at the ODMG interface.
> 
> I'm basically working with four methods, they are 
> abortTransaction(), beginTransaction(), commitTransaction() 
> and checkPoint(). Last two seems to be very similar, could 
> you clarify me what checkPoint() is used for and why it 
> should commit a transaction?

In PersistenceBrokerImpl the difference is as follows:
checkPoint() simply applies commit() to all Jdbc Connections the broker is
holding.
commitTransaction does the same but in addition it sets
conn.setAutoCommit(true) for each Jdbc Connection.

I'm not sure if the checkPoint Method is really needed. It is called in
client server mode for store operations, but I'm not sure if it is really
required.
I guess it's OK if you focus on commitTransaction().

HTH,

Thomas

> 
> thanks in advance. 
> 
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