Re: [JBoss-user] EJB in ear referencing EJB outside of ear
The java:comp/env/ejb namespace is available from anything running in the
JBoss environment, not just something in an ear. I use it when one EJB
wants to call another EJB.
- Original Message -
From: "Joost v.d. Wijgerd" <[EMAIL PROTECTED]>
To: "Richard Doust" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Friday, November 16, 2001 3:33 AM
Subject: RE: [JBoss-user] EJB in ear referencing EJB outside of ear
Hi,
If you deploy a bean outside an ear file (e.g. as a bean-jar not
as another ear file) you can reference the bean only with it's JNDI
name.
You can't user java:comp/env/ejb namespace bacause that can only be
used within one enterprise archive. So if the jndi name of your bean is
"MyBean" then just call InitialContext.lookup("MyBean") and you'll be
alright. (at least I am when I do this). If the problem persists, maybe
you can provide a stacktrace for the CommunicationException..
cheers,
JOost.
-Original Message-
From: Richard Doust [mailto:[EMAIL PROTECTED]]
Sent: Friday, November 16, 2001 4:51 AM
To: [EMAIL PROTECTED]
Subject: [JBoss-user] EJB in ear referencing EJB outside of ear
Hi.
I'm confused by the J2EE Spec. I know it's possible for an EJB packaged
in a
jar and deployed inside of an ear to reference an EJB that does not
exist
inside the ear.
I have gone from packaging all EJBs inside the ear to deploying one
externally, (on my way to deplolying most of them externally), so that a
different application deployed in the same container can access the EJBs
without having to have the EJBs packaged inside two different ears. I've
modified my deployment descriptors according to the specification, and
when
I run JBoss, the JNDIView shows me that all of the namespaces are
established as I would expect. Yet, when I try to access the externally
deployed EJB from an EJB inside the ear (doing a lookup on its Home
using
InitialContext), I get a CommunicationException. From the description,
it
seems like a weird exception to have. If anyone is interested in trying
to
help me figure this out, I could provide more details.
Thanks.
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RE: [JBoss-user] EJB in ear referencing EJB outside of ear
JOost,
Thanks for the advice. I appreciate your taking the time to respond.
I do have a better understanding of my problem this morning, having solved
it last night, and the solution didn't involve referencing the bean within
the code by its JNDI name. In fact, I think referencing a bean by its JNDI
name breaks the deployer's ability to point your code to a different
implementation at deployment time.
What got me there was finding that the root cause of the
CommunicationException was a ClassNotFoundError.
All I needed to do was package the referenced bean's jar into the same ear
(it's deployment descriptor is ignored by the container during deployment)
and add the jar to the manifest.mf for the referencing bean's jar. Because
the referencing bean has an ejb-ref in its deployment descriptor, and the
jboss.xml file maps that reference to a JNDI name, everything works fine.
Thanks again.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Joost v.d.
Wijgerd
Sent: Friday, November 16, 2001 3:33 AM
To: Richard Doust; [EMAIL PROTECTED]
Subject: RE: [JBoss-user] EJB in ear referencing EJB outside of ear
Hi,
If you deploy a bean outside an ear file (e.g. as a bean-jar not
as another ear file) you can reference the bean only with it's JNDI
name.
You can't user java:comp/env/ejb namespace bacause that can only be
used within one enterprise archive. So if the jndi name of your bean is
"MyBean" then just call InitialContext.lookup("MyBean") and you'll be
alright. (at least I am when I do this). If the problem persists, maybe
you can provide a stacktrace for the CommunicationException..
cheers,
JOost.
-Original Message-
From: Richard Doust [mailto:[EMAIL PROTECTED]]
Sent: Friday, November 16, 2001 4:51 AM
To: [EMAIL PROTECTED]
Subject: [JBoss-user] EJB in ear referencing EJB outside of ear
Hi.
I'm confused by the J2EE Spec. I know it's possible for an EJB packaged
in a
jar and deployed inside of an ear to reference an EJB that does not
exist
inside the ear.
I have gone from packaging all EJBs inside the ear to deploying one
externally, (on my way to deplolying most of them externally), so that a
different application deployed in the same container can access the EJBs
without having to have the EJBs packaged inside two different ears. I've
modified my deployment descriptors according to the specification, and
when
I run JBoss, the JNDIView shows me that all of the namespaces are
established as I would expect. Yet, when I try to access the externally
deployed EJB from an EJB inside the ear (doing a lookup on its Home
using
InitialContext), I get a CommunicationException. From the description,
it
seems like a weird exception to have. If anyone is interested in trying
to
help me figure this out, I could provide more details.
Thanks.
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RE: [JBoss-user] EJB in ear referencing EJB outside of ear
Hi,
If you deploy a bean outside an ear file (e.g. as a bean-jar not
as another ear file) you can reference the bean only with it's JNDI
name.
You can't user java:comp/env/ejb namespace bacause that can only be
used within one enterprise archive. So if the jndi name of your bean is
"MyBean" then just call InitialContext.lookup("MyBean") and you'll be
alright. (at least I am when I do this). If the problem persists, maybe
you can provide a stacktrace for the CommunicationException..
cheers,
JOost.
-Original Message-
From: Richard Doust [mailto:[EMAIL PROTECTED]]
Sent: Friday, November 16, 2001 4:51 AM
To: [EMAIL PROTECTED]
Subject: [JBoss-user] EJB in ear referencing EJB outside of ear
Hi.
I'm confused by the J2EE Spec. I know it's possible for an EJB packaged
in a
jar and deployed inside of an ear to reference an EJB that does not
exist
inside the ear.
I have gone from packaging all EJBs inside the ear to deploying one
externally, (on my way to deplolying most of them externally), so that a
different application deployed in the same container can access the EJBs
without having to have the EJBs packaged inside two different ears. I've
modified my deployment descriptors according to the specification, and
when
I run JBoss, the JNDIView shows me that all of the namespaces are
established as I would expect. Yet, when I try to access the externally
deployed EJB from an EJB inside the ear (doing a lookup on its Home
using
InitialContext), I get a CommunicationException. From the description,
it
seems like a weird exception to have. If anyone is interested in trying
to
help me figure this out, I could provide more details.
Thanks.
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