CODEWITHSUNDEEP
hibernatesessiongrails
Greedydp
Greedydp

Reputation: 205

grails withSession and current hibernate session

I am confused between withSession in Grails and current hibernate session.

My question is: Is the session object which we have access to in the closure the same as the current hibernate session object?

I wrote a Service that has an action as below:

def strangeBehavior(){

    Link.withSession { session->
        println "link current session " +  session.hashCode()
    }

    Task.withSession { session->
        println "task current session " +  session.hashCode()
    }

    Project.withSession { session->
        println "project current session " +  session.hashCode()
    }

    UserStory.withSession { session->
        println "user story current session " +  session.hashCode()
    }

    def ctx = AH.application.mainContext
        def sessionFactory = ctx.sessionFactory
        def tmp = sessionFactory.currentSession
        println " current session " +  tmp.hashCode()
    }
}

What is strange for me is that there are 5 different hash codes... If I print the 5 session objects, I see the same toString() result. That makes me guess that they have the same contents:

SessionImpl(PersistenceContext[entityKeys=[EntityKey[com.astek.agileFactory.Link#170], EntityKey[com.astek.agileFactory.Project#9]],collectionKeys=[Coll......"

Upvotes: 4

Views: 2515

Answers (1)

dmahapatro
dmahapatro

Reputation: 50245

To answer your question briefly:
The session object which we have access to in closure is not the current hibernate session.

The session object is a proxy of the current hibernate session. Hence different hash codes in each case.

Have a look at source of withSession, clearly seen setExposeNativeSession is set to false (default value is false as well) in HibernateTemplate which makes sure to always return a Session Proxy without exposing the native hibernate session.

Upvotes: 5

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