The method ejbStore is always going to be called at the end of a
transaction on a bean (and it may be called at other times as well).
This is necessary to comply to the specification. My earlier e-mail,
by the way, should have read that ejbStore happens typically, but
not EXCLUSIVELY, on transaction boundaries. It will always be
called at the end of a transaction. (See, for example, 9.1.1.0:
Commit options in the specification.)
The relevant question is whether the ejbStore call is updating
resources. An ejb container can determine that the bean's state
did not change during a transaction, and therefore not update the
resources, in the case of container-managed persistence. The
bean programmer (or object-relational mapping vendor) is
responsible for making this determination in the case of bean-
managed persistence.
The println should always be called in Dave's example. If he is
using container-managed persistence and the database is being
written after using his "gentile" function, it seems to me there is an
opportunity for improvement--either by reconfiguring his existing
application server, or changing servers. If he is using bean-
managed persistence, he probably wants to keep track of state
modifications in his bean so that ejbStore can behave intelligently.
-Dan
On 9 Apr 00, at 17:33, Charlie Alfred wrote:
> Could be that the number of entity beans returned by the
> finder is larger than the cache size configured for your
> EJB Server. As you iterate through the collection returned,
> your server may be passivating (swapping out) beans to make
> room.
>
> Charlie
>
> > -----Original Message-----
> > From: DaveFord [mailto:[EMAIL PROTECTED]]
> > Sent: Sunday, April 09, 2000 1:42 AM
> > Subject: Unneeded calls to ejbStore
> >
> >
> > The following block of code generates a customer pick list. It only READS
> > from the database and does NOT WRITE to the database. However, I have added
> > a println to CompanyBean's ejbStore method and it reports that ejbStore is
> > being called five times (once for each time through the while loop). Why is
> > ejbStore being called?
> >
> > Iterator it = companyHome.findByName("Wal").iterator();
> > while(it.hasNext()){
> > Company comp = (Company)it.next();
> > System.out.println( comp.gentile() );
> > }
> >
> > Thanks,
> >
> > Dave Ford
> >
>
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