Hi,
again, if both are packed in the same ear, the calls are optimized, I'm not
sure but I would think that two seperately deployed jars don't offer
optimized calls.
Burkhard
----- Original Message -----
From: "C Murphy @ Intechtual" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, July 11, 2001 5:16 AM
Subject: Re: [JBoss-user] In VM optimization between JBoss and Servlet
Container
> Thanks for the responses. Your responses bring up another question though
> (sorry!).
>
> So, what you are saying is that if the classes for the Web application and
> the EJBs are packaged in the same ear file, all calls between the Web
> application and the EJBs will be optimized, as well as EJB-to-EJB calls.
> Otherwise, they are loaded with different class loaders and the calls must
> be remote. Starting to make sense.
>
> My new improved question is: If I deploy two EJBs in two different jar
> files, are calls between them optimized? Or, do they each get they're own
> ClassLoader instance causing them to have to communicate via remote calls?
>
> Thanks
> Chris Murphy
>
>
> On 2001.07.10 15:11 Scott M Stark wrote:
> > Actually this is more correct than what I said. The strong type checking
> > of
> > Java won't allow a method invocation from a class loaded by one class
> > loader on the same class loaded by another class loader, even if they
> > have exactly the same bytecode. So only intra-ear calls are optimized.
> > I'll double check this with a test case but this is how the code reads.
> >
> > ----- Original Message -----
> > From: "Julian Gosnell" <[EMAIL PROTECTED]>
> > To: <[EMAIL PROTECTED]>
> > Sent: Tuesday, July 10, 2001 12:27 PM
> > Subject: Re: [JBoss-user] In VM optimization between JBoss and Servlet
> > Container
> >
> >
> > > This is my understanding of the situation.
> > >
> > > Provided that EJBs and Servlets/JSP are packaged within the same EAR
> > file,
> > the
> > > J2EEDeployer will coordinate their deployment to the EJB and Web
> > Containers.
> > >
> > > This coordination involves passing the same ClassLoader to both
> > Containers.
> > >
> > > Any components deployed with the same ClassLoader SHOULD be able to
> > talk
> > to
> > > each other directly (without serialisation of the call).
> > >
> > > i.e. If you have two components with high-bandwidth needs between
them,
> > deploy
> > > them within the same EAR.
> > >
> > > If you deploy them separately you are not giving the J2EEDeployer any
> > > information about which other components you would like to share a
> > ClassLoader
> > > with - so it has no way to perform this optimisation for you.
> > >
> > > I'm speaking with experience on the WebContainer side and
extrapolating
> > that
> > > to the EJB side - so I am open to correction on this.
> > >
> > >
> > > Jules
> > >
> > >
> > >
> > > "C Murphy @ Intechtual" wrote:
> > >
> > > > Hello,
> > > >
> > > > I'm working on a presentation for a client and I have a quick
> > question
> > > > about the optimization of in VM EJB calls in JBoss. I read in the
> > > > documentation about how EJB-to-EJB calls are automatically optimized
> > by
> > > > bypassing the network layer. I didn't find any specific
> > documentation,
> > but
> > > > it makes sense that calls from the Web/Servlet container to EJBs
> > would
> > also
> > > > be optimized when they are running in the same VM.
> > > >
> > > > My question is: Is this true for the in VM Servlet container in all
> > cases?
> > > >
> > > > The documentation talks about the differnce between internal
> > references
> > > > (Web App and EJBs deployed in an ear) and external references
> > (deployed
> > > > serperately). Are the calls always optimized because they're in the
> > same
> > > > VM or does deploying them in seperate jar files negate the
> > optimization?
> > > >
> > > > I appreciate the help
> > > >
> > > > Chris Murphy
> > > >
> > > > _______________________________________________
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