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Re: re[eclipselink-users] ading entities as other writes to the database happen

I'm using 

OC4J as my server
Eclipselink as my jpa provider
Spring to inject the container managed entity manager and the JTA

I think that using the serializable isolation level on the transaction would
achieve our requirements.


ageing student wrote:
> Hi,
> I have a requirement to read several unrelated entities. The relative
> state of the loaded entities should be as at a specific point in time i.e.
> the start of the read operation. Meanwhile other servers may be writing to
> the database and I don't wish to include any writes that occur after the
> read transaction has started. 
> So if I want to load entities A and B, but whilst I'm loading entity A
> someone else writes an update to entity B, when I move on to load entity B
> I wish to load the data prior to the update.
> I think that using isolation levels is the way to go but am unclear on
> their use.

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