[jboss-user] [JBoss Seam] - Re: persist() / remove() at end of long running conversation

[christian.bauer@jboss.com]

persist(), even with FlushMode.MANUAL, will do an immediate SQL INSERT if the identifier generator of the entity requires this. For example, 'identity' does, while 'sequence' can generate identifier values pre-INSERT. 

If you call persist() outside of transaction boundaries (TransactionType.NOT_SUPPORTED on your EJB method), it is allowed to defer insertion for pre- and post-insert identifier generators. The entity instance is then considered managed, but hasn't an identifier value assigned until the next flush of the persistence context occurs.

http://www.manning.com/bauer2



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