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

[ageing student <rsherman315@xxxxxxxxxxx>]

I'm using 

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

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

Richard


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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