Comments on: JPA Hibernate with Oracle on Eclipse

By: Hicham

Hicham — Fri, 26 Aug 2011 23:04:22 +0000

Thanks a lot Buddy

By: David

David — Thu, 26 Aug 2010 18:51:59 +0000

Hi, I ran the example and noticed the customer_id was incremented by every 50 (e.g. 100, 150, 200, 250…). However, if I ran a sql insert statement directly using SQLDeveloper, then the customer_id was incremented by 1. Why?

By: Eduardo

Eduardo — Wed, 17 Mar 2010 21:52:17 +0000

Hi, what about Booleans in Oracle, how to manage them ?

By: jcgarciam

jcgarciam — Thu, 21 Jan 2010 16:19:59 +0000

There are some things i could note by reading the code quickly:

1) Using the customerId is bad idea for HasCode and Equals, since that is dependent on the DB Sequence Itself.

Imagine an scenario where you want to store this Non Persisted object in a SET to collect them before saving into the DB (as OneTOMany Relation), it will throws NPE since the Id is not populated at that time.

In Hibernate Site they talk about that.

2) EntityManagerFactory emf =
Persistence.createEntityManagerFactory

Should be factor out into an its own initializer since this a very heavy operation and should be done only once.

I probably understand this could be just a quick POC, but it definitely needs to be re-worked.

Cheers!