Hmm, let see if I can convert my thought into words :). To persist is to update or insert automatically, depending on if the ID already exists in the datastore for the object. So persist method figures out insert or update.
You can do things after commit, but you won't be able to roll back. You don't have to use a transaction, but a transaction will keep track what happens, so if a fail happens at the last moment, you can roll back to the original record/object that exist before you started the transaction. You don't have to persist in a transaction, but if you do, you have the option to roll back on a failure. Hope that helps? Brandon Donnelson http://gwt-examples.googlecode.com -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
