Jon,
In fact the ejbStores followed by SQL updates is in fact very expensive; can
quickly double your runtimes. What Sreenivas is looking for is read-only
detection and tuned writes. What would also be useful in terms of
performance would be loading of state in finders thus reducing the number of
select loads calls. Unfortunately to do this is every bmp entity bean is
quite time consuming and feels like infrastructure building. Why are we not
looking at writing cmp entity beans?
William Louth
Inprise
www.inprise.com/appserver
-----Original Message-----
From: A mailing list for Enterprise JavaBeans development
[mailto:[EMAIL PROTECTED]]On Behalf Of Jon Finanger
Sent: Wednesday, September 13, 2000 1:54 AM
To: [EMAIL PROTECTED]
Subject: Re: How to update a BMP?
> I think ejbStore and ejbLoad is an overhead in case of Entity
> beans because unnecessary DB calls are made even if i haven't updated
anything
> in my bean.
??
I dont think that is a very huge performance killer.
> Implement only ejbCreate and ejbLoad methods and do not implement
> ejbStore. For DB consistency, After each update operation, i write sql for
> updating into the database. This also solves my problems of table joins
(joins are
> inevitable in my application).
Where are you then going to write the sql for updates?
Whats the problem with table joins?
The ejbStore is neccesary to let the container take care of updates, this
happens e.g. on the transaction demarcation - when you are doing something
that changes the entity and finish it. (se the 1.1 spec. at page 106).
Table joins etc. are handled in the database you use.
/Jon
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