but then you have to manage w-w conflict management
your self.
Kirk
----- Original Message -----
From: "Avi Kivity" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, January 21, 2001 3:05 AM
Subject: Re: How to set Container transactions
> You've hit WebLogic's pessimistic locking, I believe. Accesses from
multiple
> clients or multiple transactions will block, and are therefore
> deadlock-prone. You should use an application server that provides
> optimistic locking. WebLogic 6.0.0 provides that.
>
> - Avi
> --
> And now for something completely different.
>
> > -----Original Message-----
> > From: Yesudason Paulraj [mailto:[EMAIL PROTECTED]]
> > Sent: Sunday, January 21, 2001 07:23
> > To: [EMAIL PROTECTED]
> > Subject: How to set Container transactions
> >
> >
> > Dear friends,
> > I am facing a problem related to the EJB Transactions in my project.
> > Let me give a brief introduction about what I have and I am
> > trying to do.
> > we have 20 entity beans and an session bean. All the entity
> > bean methods are wrapped within the session bean to provide
> > meaningful business methods for the clients. I have 18
> > methods in the session bean and out of 18 , 11 methods are
> > only read operation ( Like retriving result from the DB for
> > some queries). Now the problem is that , I have a very big DB
> > and obviuosly it takes some time for the query.But the write
> > operations work very fast( because creating 2-5 records in
> > some tables).
> >
> > But I have set <trans-attribute> (Trasaction attribute) for
> > all the methods in the session bean that "RequiresNew" and
> > all the remote methods in the EntityBeans that "Required".
> >
> > Problem is , I am getting the primaryKeyLockedException
> > frequently than expected. I am sure this is because of some
> > problems in setting the transaction attribute for the Session
> > bean methods.
> >
> > Questions are :
> >
> > What transactional attribute I have to set for the Entity
> > EJB's remote methods?
> >
> > I am sure the write operations in the session bean definitely
> > needs a new transaction.
> > What sort of trasactional-attribute I have to specify in the
> > Read methods (Query methods) in the session beans. Now as I
> > have given "RequiresNew" for this methods also ,it locks the
> > rows when it reads some data so many times I am getting the
> > "PrimaryKeyLocked" exception.(I guess)
> >
> > I am using WLS5.1 on win2k.
> > Hope I will get a confidence boosting answer.
> >
>
>
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