Hibernate: 1st level cache

Question

Could someone tell me how could I peek into objects being managed by a session in Hibernate?

I am trying to use eclipse debugger and drill into persistenceContext but I am not sure if that is where I would find the objects being managed by hibernate session.

Could someone tell me how to find out the objects that are being managed by Hibernate objects?

Thanks.

Answer 1

Are you looking to use this information simply for your own benefit and learning? You won't be able to access the information as far as I know in any sort of standard JPA-approved method.

However, if you're using Hibernate, you could put a breakpoint and dig into Hibernate's implementation of PersistenceContext.java which is called StatefulPersistenceContext.java. There should be a map of entities and collections loaded. You will of course need the Hibernate source code for this.

The fields should be named something like...

private Map entitiesByKey;
private Map proxiesByKey;
private Map collectionsByKey;

EDIT: Don't forget to toggle "Show Logical Structures" in the Eclipse debugger or navigating those maps will drive you insane.