EntityOne has a reference to EntityTwo, and EntityTwo has a reference to EntityThree. All three relationships are defined as follows:

In my code, I am trying to get to EntityThree this way:

If I use FetchType.EAGER, this works perfectly. If I use LAZY, entityOne.getEntityTwo() returns a proxy, and getEntityThree() then fails:

Originally I had FetchType.EAGER, but I thought I'd switch to LAZY to improve performance (as EntityOne has a number of @ManyToOne relationships, and I usually don't need them all at any one time.) Clearly I am missing something elemental in how LAZY should work, and/or my coding technique is incorrect. Can someone point me in the right direction?

I'm not sure but can you just force the entityTwo to become a real object by referencing a method or something and then do the getEntityThree()?

Nope, that doesn't do anything.

Hi,
When you are trying to get entityOne.getEntityTwo() , as you said hibernate will return proxy. The proxy holds a reference of session object which was jused to fetch entity two. Now if that session is closed before you call getEntityThree(), you will get LazyInitializationException.

In case of Eager , real object and not proxy is returned and hence things will work fine.

Just suremake you keep the session open and you won't get this error.

Thanks
-Vishal

How do I keep the session open when I'm executing objectOne.getObjectTwo().getObjectThree()?

You must have opened the session while fetching the objectOne. Don't close that session, when you are calling one.getTwo.getThree.

Thanks
-Vishal

Sorry, but that makes no sense to me. We are using Hibernate and Seam. I don't open or close sessions.

Well, let me amend that: I inject EntityManager into my EJB. That is standard.

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