This week's book giveaway is in the Performance forum. We're giving away four copies of The Java Performance Companion and have Charlie Hunt, Monica Beckwith, Poonam Parhar, & Bengt Rutisson on-line! See this thread for details.
I`m a little bit confused at page 304 of the EJB3 in action with the code below
The purpose of the code is to undo the changes made on the item, so why don't we just say entityManager.refresh(item), insted of passig again the entityManager.merge(item) as an argument to the refresh method ??
It's the same thing with the second method when it comes to deleting an item ( why domn't we just say entityManager.remove(item) instead of entityManager.remove(entityManager.merge(item)) ??
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