Re: JMS, RMI and synchronous request-response

From:

=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>

Newsgroups:

comp.lang.java.programmer

Date:

Sun, 10 Aug 2008 20:47:30 -0400

Message-ID:

<489f8c20$0$90267$14726298@news.sunsite.dk>

EJP wrote:

Arne Vajh?j wrote:

It is present in every Java EE container including JBoss, but
not used much.

Really? It's the specified standard protocol for EJBs.

I thought they used IIOP which is a transport protocol while
CORBA is a distributed component framework (that
also uses IIOP).

I am talking about the CORBA stuff that the Java EE
standard mandates.

Examples:

<quote>
J2EE.5.8 ORB References
Some J2EE applications will need to make use of the CORBA ORB to perform
certain operations. Such applications can find an appropriate object
implementing
the ORB interface by looking up the JNDI name java:comp/ORB. The
container is
required to provide the java:comp/ORB name for all components except
applets.
Any such reference to a ORB object is only valid within the component
instance that
performed the lookup
</quote>

<quote>
J2EE applications need to use an instance of org.omg.CORBA.ORB to perform
many Java IDL and RMI-IIOP operations. The default ORB returned by a call to
ORB.init(new String[0], null) must be usable for such purposes; an
application need not be aware of the implementation classes used for the
ORB and
RMI-IIOP support.
</quote>

Nobody uses that.

And my understanding is that the app server vendors often have
huge problems with that part when they need to get certified.

Arne