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1. Persisting entity to database with JPA and autogenerated primary key identity    stackoverflow.com

I have a full JEE web application with a presentation layer and a database. I'm using derby with glassfish 3.1 and JPA to handle persistence. I've created a Read ok but ...

2. Identity of hibernate entity being retrieved    coderanch.com

Hi, I'm trying to minimize trips to the database (aren't we all?) My scenario is that I have an entity of type MyObject that I am retrieving as part of a composition of another object. In other words, the MyLargeCompositeObject instance that I am retrieving contains an instance of MyObject. Later on (but in the same transaction/session) I want to update ...

3. second level cache and entity identity    forum.hibernate.org