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 Post subject: Thanks for an excellent book - question re DB connections
PostPosted: Thu Jul 19, 2007 5:15 pm 

Joined: Tue Jul 17, 2007 3:52 pm
Posts: 3

I am new to Hibernate and getting back into JEE coding after 4 years away travelling and studying. I am really happy that a framework like Hibernate exists to do all the stuff I had to myself and much much more. Thankfully there will be no more objects that resemble database rows rather than a proper domain structure in my projects!

Also, thanks for writing a great book. It really is one of the best and clearest java books I have read, and it was easy to get into Hibernate despite being new to ORM.

I have a question: the section on OpenSessionInViewFiler mentioned that we should not use this filter on pages that do not require database access. Even though I am not using this filter and controlling Hibernate from my service layer this made me wonder… I know that for a given request I will only be reading reference data from the second level cache. In that scenario I need a hibernate session but I don’t want any contact with the database (connections acquired etc.) For pages where I only need reference data which is definitely in the cache, can I safely drop the transaction code to make sure no connections are acquired? (I am assuming beginTransaction() is where a database connection is first acquired)

Any help would be much appreciated, and thanks for the good work,


 Post subject:
PostPosted: Sat Jul 28, 2007 3:25 am 
Hibernate Team
Hibernate Team

Joined: Mon Aug 25, 2003 9:11 pm
Posts: 4592
Location: Switzerland
This is an interesting question. If you don't begin a transaction and if no SQL is ever executed against the database, the Session should not aquire a connection. Not sure though, enable debug logging and try the seclevel cache.

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