ejb test client problem with context and lookup
What can i do in this situation? (I use Sun Application Server 8.1) :
In this piece of code in a ejb test client:
Hashtable env =new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,"com.sun.jndi.cosnaming.CNCtxFactory");
env.put(Context.PROVIDER_URL,"iiop://127.0.0.1:4700");
//get naming context
Context context =new InitialContext(env);
//look up jndi name
Object ref = context.lookup("JNDIName");
I have an error in a lookup, and i tried ejb/JNDIName, java:comp/env/ejb/JNDIName but ... the error is in all situations:
javax.naming.NameNotFoundException [Root exception is org.omg.CosNaming.NamingContextPackage.NotFound: IDL:omg.org/CosNaming/NamingContext/NotFound:1.0]
at com.sun.jndi.cosnaming.ExceptionMapper.mapException(ExceptionMapper.java:44)
at com.sun.jndi.cosnaming.CNCtx.callResolve(CNCtx.java:453)
at com.sun.jndi.cosnaming.CNCtx.lookup(CNCtx.java:492)-- Failed initializing bean access.
Thanks
It looks like your JNDI name is not bound in the context. Some entities registered in JNDI (like DataSources, for example) might be visible only if you're running inside the same JVM as the JNDI directory (in-memory JNDI). DataSources created in Tomcat container are visible only to servlets deployed there, for example. External client will not see them.
If you want to see what's available in your JNDI registry use this code:
public void listJndiTree(InitialContext context,String root) {
NamingEnumeration<NameClassPair> list;
NameClassPair pair;
try {
list = context.list(root);
if (list != null) {
while (list.hasMore()) {
pair = list.next();
System.out.println("name="+pair.getName());
System.out.println("class="+pair.getClassName());
}
}
} catch (Exception x) {
x.printStackTrace();
}
}
Call this method after you create JNDI context (before lookup). Empty root string should print all entities at root level, then "ejb" should print everything in ejb/*, etc.
HTH,
Mark
We recommend using the no-arg InitialContext constructor when writing a stand-alone client that accesses EJBs within SUN AS 8.x.As long as appserv-rt.jar is in your client's classpath, the correct naming provider will be bootstrapped. You can set
-Dorg.omg.CORBA.ORBInitialHost=<host> and
-Dorg.omg.CORBA.ORBInitialPort=<port>
when starting the client JVM.These default to localhost and 3700.
Accessing the java:comp/env context would only work from within a J2EE component. A stand-alone java client is not portable and doesn't have access to a J2EE component environment, so its only option is to access the global JNDI name of the remote ejb.
--ken
ksaksa at 2007-7-13 10:40:00 >
Hi Ken thanks for answer me. but i tried to use the no arg initial context :
Context context = new InitialContext();
Object ref = context.lookup("JNDIName");
I have an error in the lookup, using sun application server 8.1:
com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl <init>
WARNING: "IOP00410201: (COMM_FAILURE) Connection failure: socketType: IIOP_CLEAR_TEXT; hostname: localhost; port: 3700"
org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code: 201 completed: No
Mark, I use this method but my jndi name isn磘 in the jndi memory. What can i do to include my jndi in the memory?Thanks
> Hi Ken thanks for answer me. but i tried to use the
> no arg initial context :
> Context context = new InitialContext();
> Object ref = context.lookup("JNDIName");
>
> I have an error in the lookup, using sun application
> server 8.1:
Double-check that the server is running. If so, is it running on the
same machine as the client? Also double-check the port number of
the orb's naming service in the server by looking in
domains/domain1/config/domain.xml. You should see a line that
looks like :
<iiop-listener address="0.0.0.0" enabled="true" id="orb-listener-1" port="3700" security-enabled="false"/>
The default port is 3700 but if the number you have is different you'll
need to specify it as a -D property when starting the client JVM. Assuming
your port is 3800 and the server is running on host Foo, add the following
two properties to the java command that starts your client :
-Dorg.omg.CORBA.ORBInitialHost=Foo
-Dorg.omg.CORBA.ORBInitialPort=3800
--ken
>
> com.sun.corba.ee.impl.transport.SocketOrChannelConnect
> ionImpl <init>
>
> WARNING: "IOP00410201: (COMM_FAILURE) Connection
> failure: socketType: IIOP_CLEAR_TEXT; hostname:
> localhost; port: 3700"
>
> org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code:
> 201 completed: No
ksaksa at 2007-7-13 10:40:00 >
Hi Ken, I use the port 3700 in the domain.xml, but now, the problem is that:
javax.naming.NameNotFoundException: JNDIName not found
at com.sun.enterprise.naming.TransientContext.doLookup(TransientContext.java:185)
at com.sun.enterprise.naming.TransientContext.lookup(TransientContext.java:157)
at com.sun.enterprise.naming.SerialContextProviderImpl.lookup(SerialContextProviderImpl.java:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)-- Failed initializing bean access.
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:123)
at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatchToServant(CorbaServerRequestDispatcherImpl.java:648)
at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatch(CorbaServerRequestDispatcherImpl.java:192)
at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequestRequest(CorbaMessageMediatorImpl.java:1709)
at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:1569)
at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleInput(CorbaMessageMediatorImpl.java:951)
at com.sun.corba.ee.impl.protocol.giopmsgheaders.RequestMessage_1_2.callback(RequestMessage_1_2.java:181)
at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:721)
at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.dispatch(SocketOrChannelConnectionImpl.java:469)
at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.doWork(SocketOrChannelConnectionImpl.java:1258)
at com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:409)
-- Initializing bean access.
What can i do to include my jndi name?
Hi Santiago,
Did your ejb application successfully deploy? What is the jndi-name of the Remote ejb you are attempting to lookup?It should be specified in the jndi-name element of the sun-ejb-jar.xml packaged within your ejb-jar. Here's an example :
<sun-ejb-jar>
<enterprise-beans>
<ejb>
<ejb-name>FooBean</ejb-name>
<jndi-name>ejb/FooBean</jndi-name>
</ejb>
</enterprise-beans>
</sun-ejb-jar>
There is no defaulting of jndi-names in AS 8.x.In AS 9.x, available via Glassfish and the recently released beta version of the Java EE 5 SDK, the ejb container will default the
jndi-name of an ejb to the fully-qualified name of its Home interface.
--ken
ksaksa at 2007-7-13 10:40:00 >
Hi Ken.My application deploy successfully, and I check the sun-ejb-jar.xml and my jndi name is in the file. .... I tried to create another ejb in the same project but i have the same problem, what can i do?Thanks
Please post your sun-ejb-jar.xml and the source code for the lookup portion of your client program.
You can also check the admin console through your browser at <server_host>:4848. Click on
Application Server. There's a JNDI Browsing tab under the General tab that should show all the global jndi names known to the app server.
ksaksa at 2007-7-13 10:40:00 >
this is the code:
public void initialize() {
long startTime = 0;
if (logging) {
log("Initializing bean access.");
startTime = System.currentTimeMillis();
}
try {
//get naming context
Context context = new InitialContext();
//look up jndi name
Object ref = context.lookup("Prueba");
//look up jndi name and cast to Home interface
pruebaHome = (PruebaHome) PortableRemoteObject.narrow(ref,
PruebaHome.class);
if (logging) {
log(
"Succeeded initializing bean access through Home interface.");
long endTime = System.currentTimeMillis();
log("Execution time: " + (endTime - startTime) + " ms.");
}
} catch (Exception e) {
if (logging) {
log("Failed initializing bean access.");
}
e.printStackTrace();
}
}
And this is the sun-ejb-jar.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sun-ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Application Server 8.1 EJB 2.1//EN" "http://www.sun.com/software/appserver/dtds/sun-ejb-jar_2_1-1.dtd">
<sun-ejb-jar>
<enterprise-beans>
<unique-id>0</unique-id>
<ejb>
<ejb-name>Prueba</ejb-name>
<jndi-name>Prueba</jndi-name>
<pass-by-reference>false</pass-by-reference>
<is-read-only-bean>false</is-read-only-bean>
<refresh-period-in-seconds>-1</refresh-period-in-seconds>
<cmt-timeout-in-seconds>0</cmt-timeout-in-seconds>
<gen-classes/>
</ejb>
</enterprise-beans>
</sun-ejb-jar>
