Problem doing lookup

Question

Hi,
I used pramati studio 3.0 and JBoss 3.0.4
PROBLEM: i am not able to do a look up on the beans running on the server.
SITUATION:: I have written a session bean which communicates with an entity bean. I deployed them on JBoss 3.0.4 and they were succesfully deployed.
Here is the server console
14:30:45,015 INFO [EARDeployer] Init J2EE application: file:/C:/jboss-3.0.4/ser
ver/default/deploy/Meka.ear
14:30:45,171 INFO [EjbModule] Creating
14:30:45,171 INFO [EjbModule] Deploying Entity
14:30:45,328 INFO [EjbModule] Deploying Session
14:30:45,390 INFO [EjbModule] Created
14:30:45,390 INFO [EjbModule] Starting
14:30:46,765 INFO [Entity] Created table 'ENTITY' successfully.
14:30:46,781 INFO [EjbModule] Started
14:30:46,859 INFO [jbossweb] Registered jboss.web:Jetty=0,JBossWebApplicationCo
ntext=2,context=/MekaWeb
14:30:46,906 INFO [jbossweb] Extract jar:file:/C:/jboss-3.0.4/server/default/tm
p/deploy/server/default/deploy/Meka.ear/58.Meka.ear-contents/MekaWeb.war!/ to C:
\DOCUME~1\ADMINI~1\LOCALS~1\Temp\Jetty_0_0_0_0_8080__MekaWeb\webapp
14:30:47,187 INFO [jbossweb] Started WebApplicationContext[MekaWeb,MekaWeb]
14:30:47,203 INFO [jbossweb] successfully deployed file:/C:/jboss-3.0.4/server/
default/tmp/deploy/server/default/deploy/Meka.ear/58.Meka.ear-contents/MekaWeb.w
ar to /MekaWeb
14:30:47,203 INFO [MainDeployer] Deployed package: file:/C:/jboss-3.0.4/server/
default/deploy/Meka.ear
14:30:47,218 INFO [URLDeploymentScanner] Started
14:30:47,218 INFO [MainDeployer] Deployed package: file:/C:/jboss-3.0.4/server/
default/conf/jboss-service.xml
14:30:47,218 INFO [Server] JBoss (MX MicroKernel) [3.0.4 Date:200211021607] Sta
rted in 0m:18s:906ms
Now i have written a client which looks up the session bean as below
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,
"org.jnp.interfaces.NamingContextFactory");
env.put(Context.PROVIDER_URL, "localhost:1099");
env.put("java.naming.factory.url.pkgs",
"org.jboss.naming:org.jnp.interfaces");
try {
Context ctx = new InitialContext(env);
Session_LocalHome session_lh = (Session_LocalHome) ctx.lookup("java:comp/env/Session_LocalHome");
Session_Local session_local = session_lh.create();
I am getting the following error
javax.naming.NameNotFoundException: comp not bound
at org.jnp.server.NamingServer.getBinding(NamingServer.java:495)
at org.jnp.server.NamingServer.getBinding(NamingServer.java:503)
at org.jnp.server.NamingServer.getObject(NamingServer.java:509)
at org.jnp.server.NamingServer.lookup(NamingServer.java:253)
at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
at sun.rmi.transport.Transport$1.run(Transport.java:148)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:4
60)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport
.java:701)
at java.lang.Thread.run(Thread.java:536)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Stream
RemoteCall.java:247)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:
223)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:133)
at org.jnp.server.NamingServer_Stub.lookup(Unknown Source)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:456)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:440)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at Client.<init>(Client.java:39)
at Client.main(Client.java:87)
I have tried to look in the internet for a long time but could not get enough help. I have even looked a couple of books but i havent been able to get proper help.
And yeah i am trying to look up beans on LocalHome interfaces because client and beans are on same JVM (same machine).
Thank You
Meka Toka

Answer 1

Hi,
Thank you for the help.
I have gone through the document that you mentioned and have identified the problem.
I am looking up a bean on a particular name and that name is not existing at that location.
Now, the document in jboss website said that by default the JBoss binds the display name as the jndi name for the bean and we can override that in the jboss.xml file. And so i had written the jboss.xml as below
<?xml version="1.0" encoding="UTF-8"?>
<jboss>
<enterprise-beans>
<session>
<ejb-name>Session</ejb-name>
<jndi-name>session/Session_LocalHome</jndi-name>
</session>
</enterprise-beans>
</jboss>
so that i can be doing a lookup using
Session_LocalHome session_lh = (Session_LocalHome) ctx.lookup("session/Session_LocalHome");
Session_Local session_local = session_lh.create();
If you look at http://www.jboss.org/online-manual/HTML/ch05.html if at all we happen to use a jboss.xml to override the jndi names, then it must be placed in the META-INF directory of the 'ear'.
But even after all this i am getting an error
javax.naming.NameNotFoundException: session not bound
Please let me know what am i missing there.
Regards
Meka Toka
NOTE: In http://www.jboss.org/online-manual/HTML/ch05.html it said that jboss.xml should be added in META-INF directory but it didnt say if was in ear or in jar.
I tried both, when i added in jar i got error while deploying the ear, but when i added jboss.xml in ear , the ear deployed succesfully.