[jboss-user] [JBoss Seam] - Re: manual flushing and state from database

[cja987]

Versioning and optimistic locking is also immune to the inevitable race condition of checking for changes before a commit.  It does throw an exception though, which makes recovery like offering a "merge" screen somewhat complicated.

Sometimes you still might want to peek outside the current transaction, like if you wanted to poll for changes during an edit session and show a warning.  A query in a different entitymanager (like one you get from @PersistenceContext or from JNDI) ought to do the trick, no?


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