JNDI not creating for EJB Local interfaces example

[murali kankanala]

Hi Friends,

I have created an EJB example with Local interfaces. My problem is its not creating a JNDI name inside JNDI tree.
Its not showing any issues when i start the weblogic server. Other Session beans are deplolyed properly.

Below i am giving the code.

EJBLocal Interface:

public interface CalculatorLocal extends EJBLocalObject 
{  
	  public double add(double arg1, double arg2);
	  public double subtract(double arg1, double arg2);
	  public double multiply(double arg1, double arg2);
	  public double devide(double arg1, double arg2);
  
 }

EJBLocal Home Interface:

public interface CalculatorLocalHome extends EJBLocalHome 
{
  public CalculatorLocal create() throws CreateException;
   
}

Bean Impl:

public class CalculatorLocalStatelessSessionBean implements SessionBean 
{
	private SessionContext ctx;
	//private UserTransaction userTran = null;
	//These two variables are to test whether stateless session is a able to remember previous state ( previous values).
	private double arg1;
	private double arg2;

	public void setSessionContext(SessionContext ctx) 
	{
		System.out.println("setSessionContext called");
		//Following line should not use when we declared <transaction-type>Container</transaction-type> in ejb-jar.xml
		//That means we are telling container should be responsible to take care or transaction management.
		//this.ctx = ctx; ctx.getUserTransaction();
		
	}
	public void ejbCreate () {	
		System.out.println("ejbCreate called");
	}
	//You never see this method called on Stateless Session Bean.
	public void ejbActivate() {
		System.out.println("ejbActivate called");
	}
	//You never see this method called on Stateless Session Bean.
	public void ejbPassivate() {
		System.out.println("ejbPassivate called");
	}
	public void ejbRemove() {
		System.out.println("ejbRemove called");
	}
	//=================== Business Methods or Service methods of Calculator ====================
	public double add(double arg1, double arg2) 
	{
		//We are assigning to test whether stateless session is a able to remember previous state ( previous values).
		System.out.println("Previous arg1 = "+this.arg1);
		System.out.println("Previous arg2 = "+this.arg2);
		this.arg1 = arg1;
		this.arg2 = arg2;
		
		System.out.println("Current arg1 = "+arg1);
		System.out.println("Current arg2 = "+arg2);
		
		double result = arg1 + arg2;		
		return result;
	}
	
	public double subtract(double arg1, double arg2) 
	{
		//We are assigning to test whether stateless session is a able to remember previous state ( previous values).
		System.out.println("Previous arg1 = "+this.arg1);
		System.out.println("Previous arg2 = "+this.arg2);
		this.arg1 = arg1;
		this.arg2 = arg2;
		
		System.out.println("Current arg1 = "+arg1);
		System.out.println("Current arg2 = "+arg2);
		double result = arg1 - arg2;		
		return result;
	}
  
	public double multiply(double arg1, double arg2) 
	{
		//We are assigning to test whether stateless session is a able to remember previous state ( previous values).
		System.out.println("Previous arg1 = "+this.arg1);
		System.out.println("Previous arg2 = "+this.arg2);
		this.arg1 = arg1;
		this.arg2 = arg2;
		
		System.out.println("Current arg1 = "+arg1);
		System.out.println("Current arg2 = "+arg2);
		
		double result = arg1 * arg2;		
		return result;
	}
	
	public double devide(double arg1, double arg2) 
	{
		//We are assigning to test whether stateless session is a able to remember previous state ( previous values).
		System.out.println("Previous arg1 = "+this.arg1);
		System.out.println("Previous arg2 = "+this.arg2);
		this.arg1 = arg1;
		this.arg2 = arg2;
		
		System.out.println("Current arg1 = "+arg1);
		System.out.println("Current arg2 = "+arg2);
		
		double result = arg1 / arg2;		
		return result;
	}
}

ejb-jar.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd">
<ejb-jar>
	<display-name>Calculator Local Service</display-name>
	<enterprise-beans>
		<session>
			<ejb-name>CalculatorLocalTest</ejb-name>
			<local-home>com.training.ejb.day1.localinterfaces.calculator.CalculatorLocalHome</local-home>
			<local>com.training.ejb.day1.localinterfaces.calculator.CalculatorLocal</local>
			<ejb-class>com.training.ejb.day1.localinterfaces.calculator.CalculatorLocalStatelessSessionBean</ejb-class>
			<session-type>Stateless</session-type>
			<transaction-type>Container</transaction-type>			
		</session>
	</enterprise-beans>
</ejb-jar>

weblogic-ejb-jar.xml

<!DOCTYPE weblogic-ejb-jar PUBLIC 
  '-//BEA Systems, Inc.//DTD WebLogic 7.0.0 EJB//EN' 
  'http://www.bea.com/servers/wls700/dtd/weblogic-ejb-jar.dtd'>

<weblogic-ejb-jar>
	<weblogic-enterprise-bean>
		<ejb-name>CalculatorLocalTest</ejb-name>
		<stateless-session-descriptor>
			<pool>
				<initial-beans-in-free-pool>5</initial-beans-in-free-pool>
			</pool>
		</stateless-session-descriptor>
		<jndi-name>CalculatorLocalTest</jndi-name>	
	</weblogic-enterprise-bean>
</weblogic-ejb-jar>

[Ninad Kulkarni]

murali wrote:My problem is its not creating a JNDI name inside JNDI tree.

How you know that JNDI is not creating?
According to my thinking by using JNDI we will get to reference of remote.
Please clear me

[murali kankanala]

Hi,

I forgot to paste my client code ( stand alone but not web app).

public class CalculatorLocalClient {

	public static void main(String[] args) {

	
		Context ctx = null;
		Hashtable ht = new Hashtable();
		ht.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
		ht.put(Context.PROVIDER_URL, "t3://localhost:7001");
		ht.put(Context.SECURITY_PRINCIPAL, "system");
		ht.put(Context.SECURITY_CREDENTIALS, "sysadmin1");
		
		CalculatorLocal calculatorLocal = null;
		CalculatorLocalHome calculatorLocalHome = null;
	        
	      try{
	            
	    	  ctx = (Context) new InitialContext(ht);
	           
	          //Look up the home or factory object on the WebLogic JNDI tree  
	          Object home  = ctx.lookup("CalculatorLocalTest");
	          
	          if (home == null)
	          {
	        	  System.out.println("problem in getting Home object");
	          }
	             
	          //This method call is necessary for EJB code that uses a technology called RMI-IIOP
	          calculatorLocalHome = (CalculatorLocalHome)home;
	             
	          //close the InitialContext
	          ctx.close( );	         	           
	             
	          //Get the remote interface by calling the home object's create() method
	          calculatorLocal = calculatorLocalHome.create();
	          
	          System.out.println(calculatorLocal.add(10, 20));
	          System.out.println(calculatorLocal.subtract(10, 20));
	          System.out.println(calculatorLocal.multiply(10, 20));
	          System.out.println(calculatorLocal.devide(10, 20));
	             
	      } catch (NamingException ne) { 
	          
	    	  ne.printStackTrace();
	    	  
	      } catch (CreateException ce) { 
	           
	    	  ce.printStackTrace();
	      }	 
	}

}

When i deploy the local interfaces ejb its success.

<Jun 21, 2010 12:32:05 PM EDT> <Warning> <EJB> <BEA-010212> <The EJB 'Calculator
LocalTest(Application: _appsdir_calculatorlocal_jar, EJBComponent: calculatorloc
al)' contains at least one method without an explicit transaction attribute sett
ing. The default transaction attribute of Supports will be used for the followin
g methods: local[multiply(double,double), subtract(double,double), devide(double
,double), add(double,double)]  >
setSessionContext called
ejbCreate called
setSessionContext called
ejbCreate called
setSessionContext called
ejbCreate called
setSessionContext called
ejbCreate called
setSessionContext called
ejbCreate called
<Jun 21, 2010 12:32:07 PM EDT> <Warning> <Server> <BEA-002611> <Hostname "srisaa
nvi-PC", maps to multiple IP addresses: 192.168.1.185, fe80:0:0:0:2437:4ba:3f57:
fe46%11, fe80:0:0:0:867:355b:a04d:eb4b%10, 2001:0:4137:9e74:2437:4ba:3f57:fe46>

But in the JNDI tree the name is not there, so when i run my client code its giving me the following error.

javax.naming.NameNotFoundException: Unable to resolve 'CalculatorLocalTest'. Resolved '' [Root exception is javax.naming.NameNotFoundException: Unable to resolve 'CalculatorLocalTest'. Resolved '']; remaining name 'CalculatorLocalTest'
	at weblogic.rjvm.ResponseImpl.unmarshalReturn(ResponseImpl.java:234)
	at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:348)
	at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:259)
	at weblogic.jndi.internal.ServerNamingNode_1031_WLStub.lookup(Unknown Source)
	at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:400)
	at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:388)
	at javax.naming.InitialContext.lookup(InitialContext.java:351)
	at com.training.ejb.day1.localinterfaces.calculator.client.CalculatorLocalClient.main(CalculatorLocalClient.java:43)
Caused by: javax.naming.NameNotFoundException: Unable to resolve 'CalculatorLocalTest'. Resolved ''
	at weblogic.jndi.internal.BasicNamingNode.newNameNotFoundException(BasicNamingNode.java:1139)
	at weblogic.jndi.internal.BasicNamingNode.lookupHere(BasicNamingNode.java:252)
	at weblogic.jndi.internal.ServerNamingNode.lookupHere(ServerNamingNode.java:182)
	at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:206)
	at weblogic.jndi.internal.RootNamingNode_WLSkel.invoke(Unknown Source)
	at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:589)
	at weblogic.rmi.cluster.ClusterableServerRef.invoke(ClusterableServerRef.java:230)
	at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:477)
	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)
	at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:147)
	at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:473)
	at weblogic.rmi.internal.wls.WLSExecuteRequest.run(WLSExecuteRequest.java:118)
	at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
	at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)

Even i tried differently as follows:

  ctx = new InitialContext();
	           
	          //Look up the home or factory object on the WebLogic JNDI tree  
	          Object home  = ctx.lookup("java:comp/env/ejb/CalculatorLocalTest");
	          
	          if (home == null)
	          {
	        	  System.out.println("problem in getting Home object");
	          }
	             
	          //This method call is necessary for EJB code that uses a technology called RMI-IIOP
	          calculatorLocalHome = (CalculatorLocalHome)home;
	             
	          //close the InitialContext
	          ctx.close( );	         	           
	             
	          //Get the remote interface by calling the home object's create() method
	          calculatorLocal = calculatorLocalHome.create();
	          
	          System.out.println(calculatorLocal.add(10, 20));
	          System.out.println(calculatorLocal.subtract(10, 20));
	          System.out.println(calculatorLocal.multiply(10, 20));
	          System.out.println(calculatorLocal.devide(10, 20));

Then i got the following exception.

javax.naming.NameNotFoundException: remaining name: env/ejb/CalculatorLocalTest
	at weblogic.j2eeclient.SimpleContext.resolve(SimpleContext.java:35)
	at weblogic.j2eeclient.SimpleContext.resolve(SimpleContext.java:39)
	at weblogic.j2eeclient.SimpleContext.lookup(SimpleContext.java:59)
	at weblogic.j2eeclient.SimpleContext.lookup(SimpleContext.java:59)
	at weblogic.j2eeclient.SimpleContext.lookup(SimpleContext.java:64)
	at javax.naming.InitialContext.lookup(InitialContext.java:351)
	at com.training.ejb.day1.localinterfaces.calculator.client.CalculatorLocalClient.main(CalculatorLocalClient.java:43)

Please help me with.

[Ninad Kulkarni]

@ Murali
1. Check if JNDI is created or not in your weblogic server
2. Use

javax.rmi.PortableRemoteObject.narrow(home,CalculatorLocalHome.class) 

and cast it to CalculatorLocalHome then use that reference and call create method then you will get CalculatorLocal object then call your required method

Correct me if wrong

[murali kankanala]

JNDI name not created in the Weblogic JNDI tree.

I tried as you mentioned

javax.rmi.PortableRemoteObject.narrow(home,CalculatorLocalHome.class) 

No luck.

[Ninad Kulkarni]

Then JNDI name should be created in you weblogic server

[Ninad Kulkarni]

Which version of weblogic server you are using?

[Vishwanath Krishnamurthi]

Hi Murali,

When you want to get a session bean instance from a standalone-java-client, get it through a remote interface.

This is because, the standalone-java-client runs in one JVM instance and the web-app code in another JVM instance. If the client is a the web-client running in the same JVM, local interface should suffice.

HTH,
Vishwa

[murali kankanala]

Hi Vishwanath,

Now i realized that Local EJB means that should be part the same JVM/inside same server ( i knew this basics for forgot - thanks for reminding me).
As you said i moved this look up code from my standalone program to the another EJB impl Bean i have written some test method in that bean impl and pasted this local interface look up code. There also its giving same exception

javax.naming.NameNotFoundException: Unable to resolve 'CalculatorLocalTest'. Resolved '' [Root exception is javax.naming.NameNotFoundException: Unable to resolve 'CalculatorLocalTest'. Resolved '']; remaining name 'CalculatorLocalTest'  
    at weblogic.rjvm.ResponseImpl.unmarshalReturn(ResponseImpl.java:234)   
    at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:348)   
    at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:259)   
    at weblogic.jndi.internal.ServerNamingNode_1031_WLStub.lookup(Unknown Source)   
    at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:400)   
    at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:388)   
    at javax.naming.InitialContext.lookup(InitialContext.java:351)   
    at com.training.ejb.day1.localinterfaces.calculator.client.CalculatorLocalClient.main(CalculatorLocalClient.java:43)   
Caused by: javax.naming.NameNotFoundException: Unable to resolve 'CalculatorLocalTest'. Resolved ''  
    at weblogic.jndi.internal.BasicNamingNode.newNameNotFoundException(BasicNamingNode.java:1139)   
    at weblogic.jndi.internal.BasicNamingNode.lookupHere(BasicNamingNode.java:252)   
    at weblogic.jndi.internal.ServerNamingNode.lookupHere(ServerNamingNode.java:182)   
    at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:206)   
    at weblogic.jndi.internal.RootNamingNode_WLSkel.invoke(Unknown Source)   
    at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:589)   
    at weblogic.rmi.cluster.ClusterableServerRef.invoke(ClusterableServerRef.java:230)   
    at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:477)   
    at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)   
    at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:147)   
    at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:473)   
    at weblogic.rmi.internal.wls.WLSExecuteRequest.run(WLSExecuteRequest.java:118)   
    at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)   
    at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)  

[Vj Vjj]

Even I am getting the same exception:
My Directory structure is given in attachment
This is the code of clientBean.java which is accessing the EJB:

package example;

import java.rmi.RemoteException;
import java.util.Hashtable;

import javax.ejb.CreateException;
import javax.ejb.RemoveException;
import javax.naming.*;
import javax.rmi.PortableRemoteObject;

public class ClientBean {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
TestSessionBeanHome testSessionBean;
try {
Hashtable ht = new Hashtable();
ht.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory");
ht.put(Context.PROVIDER_URL,"t3://localhost:5070");
InitialContext ctx = new InitialContext(ht);
//Look up the home or factory object on the WebLogic JNDI tree
Object objref = ctx.lookup("TestSessionBean");
if (objref == null)
{
System.out.println("problem in getting Home object");
}
testSessionBean= (TestSessionBeanHome)objref;
//testSessionBean = (TestSessionBeanHome)PortableRemoteObject.narrow(objref,TestSessionBeanHome.class);
System.out.println("Calling Session Bean");
TestSessionBean beanRemote;
beanRemote = testSessionBean.create();
beanRemote.SayHello();
beanRemote.remove();
//close the InitialContext
ctx.close( );


} catch (NamingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (RemoteException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (CreateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (RemoveException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}




}

}

This is the Remote Object TestSessionBean.java

package example;
import javax.ejb.*;
public interface TestSessionBean extends javax.ejb.EJBObject{
public String SayHello() throws java.rmi.RemoteException;

}

This is the Home Interface TestSessionBeanHome.java

package example;
import javax.ejb.*;
public interface TestSessionBeanHome extends javax.ejb.EJBHome {
public example.TestSessionBean create()throws javax.ejb.CreateException,java.rmi.RemoteException;
}

This is the SessionBean MyTestSessionBean.java


package example;

import javax.ejb.*;
import java.rmi.RemoteException;

public class MyTestSessionBean implements SessionBean{
public void ejbCreate()throws CreateException{

}
public void setSessionContext(SessionContext aContext)throws EJBException{

}
public void ejbActivate()throws EJBException{

}
public void ejbPassivate()throws EJBException{

}
public void ejbRemove()throws EJBException{

}
public String SayHello(){
String msg="Hello World";
System.out.println(msg);
return msg;
}
}

EJB-JAR:
\<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd">
<ejb-jar>

<description>EJB Examples</description>
<display-name>EJB Examples</display-name>

<enterprise-beans>

<!-- Session Beans -->
<session>
<description>EJB Test Session Bean</description>
<display-name>EJB Test Session Bean</display-name>

<ejb-name>TestSessionBean</ejb-name>

<home>example.TestSessionBeanHome</home>
<remote>example.TestSessionBean</remote>
<ejb-class>example.MyTestSessionBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>

<env-entry>
<env-entry-name>TestSessionBean</env-entry-name>
<env-entry-type>java.lang.String</env-entry-type>
<env-entry-value>Test Bean</env-entry-value>
</env-entry>

</session>

</enterprise-beans>
</ejb-jar>

WEBLOGIC_EJB_JAR:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE weblogic-ejb-jar PUBLIC
"-//BEA Systems, Inc.//DTD WebLogic 8.1.0 EJB//EN"
"http://www.bea.com/servers/wls810/dtd/weblogic-ejb-jar.dtd" >


<weblogic-ejb-jar>
<description>Session Bean Example</description>
<weblogic-enterprise-bean>
<ejb-name>TestSessionBean</ejb-name>
<stateless-session-descriptor>
</stateless-session-descriptor>
<reference-descriptor>
</reference-descriptor>
<jndi-name>TestSessionBean</jndi-name>
</weblogic-enterprise-bean>
</weblogic-ejb-jar>

and finally the error while running the client code in ecclipse after deploying the jar on weblogic 8.1 server:

javax.naming.NameNotFoundException: Unable to resolve 'TestSessionBean' Resolved [Root exception is javax.naming.NameNotFoundException: Unable to resolve 'TestSessionBean' Resolved ]; remaining name 'TestSessionBean'
at weblogic.rjvm.BasicOutboundRequest.sendReceive(BasicOutboundRequest.java:108)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:290)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:248)
at weblogic.jndi.internal.ServerNamingNode_816_WLStub.lookup(Unknown Source)
at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:375)
at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:363)
at javax.naming.InitialContext.lookup(Unknown Source)
at example.ClientBean.main(ClientBean.java:24)
Caused by: javax.naming.NameNotFoundException: Unable to resolve 'TestSessionBean' Resolved
at weblogic.jndi.internal.BasicNamingNode.newNameNotFoundException(BasicNamingNode.java:924)
at weblogic.jndi.internal.BasicNamingNode.lookupHere(BasicNamingNode.java:230)
at weblogic.jndi.internal.ServerNamingNode.lookupHere(ServerNamingNode.java:154)
at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:188)
at weblogic.jndi.internal.RootNamingNode_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:491)
at weblogic.rmi.cluster.ReplicaAwareServerRef.invoke(ReplicaAwareServerRef.java:120)
at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:434)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:147)
at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:429)
at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:35)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:224)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:183)

Please help