I recently installed jBoss 2 with no problems and am now
trying to get the "Titan" examples from Richard Monson-
Haefel's EJB book (chapter 4) to run.
So far, I've successfully deployed the Cabin entity bean
and it works fine--the bean, the CMP, and the client all
perform flawlessly. When I deployed the TravelAgentBean
(a stateless session bean that attempts to be a "client"
of the Cabin bean), however, I ran into a problem I've
spent a couple of days trying to resolve.
I've tinkered extensively with the xml files and looked
at the bank examples to try to replicate the style as
much as I could, to no avail. I suspect some sort of issue
with the EJB "link," but it's all somewhat new to me, and
I'm really not sure. My current setup is a folder in
the jBoss/deploy folder with _one_ set of meta-inf xml
files.
My working client has code like this:
Context jndiContext = getInitialContext();
Object obj = jndiContext.lookup("titan/CabinBean");
...and it works as advertised. (The getInitialContext()
method simply creates an InitialContext after setting
java.naming.factory.initial and java.naming.provider.url
properties.)
The session bean does this:
jndiContext = new InitialContext();
Object obj = jndiContext.lookup("titan/CabinBean");
...and fails consistently in the lookup() method.
I've tried a variety of things:
* using the getInitialContext() method instead of
new InitialContext()
* altering ejb-jar.xml and jboss.xml using every method
I could think of, both graphically and manually, as
well as making a link called ejb/CabinBean as in the
bank samples
* passing different JNDI names into the lookup() method
...all to no avail.
When I try jndiContext.lookup("titan/CabinBean"), which works perfectly
from the client, I get this:
javax.naming.CommunicationException. Root exception is at
java.net.URL.<init>(URL.java:473)
at java.net.URL.<init>(URL.java:376)
at java.net.URL.<init>(URL.java:330)
at sun.rmi.server.LoaderHandler.pathToURLs(LoaderHandler.java:374)
at sun.rmi.server.LoaderHandler.getClassLoader(LoaderHandler.java:254)
at
sun.rmi.server.MarshalInputStream.resolveProxyClass(MarshalInputStream.java:
172)
at
java.io.ObjectInputStream.inputProxyClassDescriptor(ObjectInputStream.java:9
82)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236)
at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1186)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236)
at java.rmi.MarshalledObject.get(MarshalledObject.java:138)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:171)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:152)
at javax.naming.InitialContext.lookup(InitialContext.java:350)
at
com.titan.travelagent.TravelAgentBean.listCabins(TravelAgentBean.java:33)
at java.lang.reflect.Method.invoke(Native Method)
at
org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(Stateles
sSessionContainer.java:286)
at
org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:82
)
at
org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSe
ssionInstanceInterceptor.java:73)
at org.jboss.ejb.plugins.TxInterceptor.invoke(TxInterceptor.java:179)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:140)
at
org.jboss.ejb.StatelessSessionContainer.invoke(StatelessSessionContainer.jav
a:152)
at
org.jboss.ejb.plugins.jrmp.server.JRMPContainerInvoker.invoke(JRMPContainerI
nvoker.java:129)
at java.lang.reflect.Method.invoke(Native Method)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:241)
at sun.rmi.transport.Transport$1.run(Transport.java:142)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:139)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:443)
at
sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:6
43)
at java.lang.Thread.run(Thread.java:484)
For jndiContext.lookup("CabinBean"), this happens:
javax.naming.NameNotFoundException: CabinBean not bound
...which is what I expected.
Finally, I try jndiContext.lookup("ejb/CabinBean") and get this:
javax.naming.NameNotFoundException: ejb not bound
Has anyone out there gotten this to work? Anyone have any ideas?
TIA,
David
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