Don't forget the more iportant generic JTA package. Any subsytem that presents
itself to the EJB server with the interface javax.transaction.XAResource
interface could be thought of as a transactional resource manager. (JDBC and JMS
actually do that).
Assaf Arkin wrote:
> I don't remember the formal definition, but a resource is anything that
> your application might wish to use, has a cost, and as such must be
> managed. The resource manager is actually not part of the EJB server.
> The RDBMS, LDAP server, SMTP agent are resource managers.
>
> The EJB container (more specifically the transaction manager) manages
> pooling, transaction enlistment, security, and quotas on all these
> resources based on a policy that best fits the application.
>
> All resources are exposed through the JNDI environment naming context.
>
> JDBC, JMS, URL and JavaMail are on that list for EJB, JDBC and JMS also
> include the necessary APIs for pooling and transaction enlistment.
>
> arkin
>
> Laird Nelson wrote:
> >
> > "John K. Peterson" wrote:
> > > > 1. JNDI
> > > > 2. JDBC
> > > > 3. JMS
> > > Don't forget (for J2EE):
> > > 4. URL
> > > 5. JavaMail
> >
> > OK. So do the previous 5 items constitute the official list of resource
> > managers for the 1.1 specification? Sun? Anyone out there? Does
> > anyone know why they are resource managers? What are they managing?
> > What is a resource? How were the five items listed determined to be
> > resource managers? Is there documentation (I'll go check the spec.)
> > other than the spec. that lists these somewhere?
> >
> > Cheers,
> > Laird
> >
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>
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--
Francis Pouatcha
MATHEMA Software GmbH
http://www.mathema.de
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