InitialContext reference and definition

[davestar]

My Session EJB is successfully deployed in JBoss 4.2.2 and here's the entry in the Global JNDI Namespace from the JMX console.

+- MXIntegrationEAR (class: org.jnp.interfaces.NamingContext)
 | +- BurdenRateFacade (class: org.jnp.interfaces.NamingContext)
 | | +- local (proxy: $Proxy80 implements interface gov.usbr.data.cdw.BurdenRateFacadeLocal,interface org.jboss.ejb3.JBossProxy)
 | | +- remote (proxy: $Proxy78 implements interface gov.usbr.data.cdw.BurdenRateFacadeRemote,interface org.jboss.ejb3.JBossProxy)

In my client code where I try to get a local reference of the EJB, this runs with a main method from a java class that is not deployed in the App server.
When I do a

Context ctx = new InitialContext()
ctx.lookup("BurdenRateFacade")

I get a

javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter

Do I need to define an ejb-jar.xml? with some entries like these?

<ejb-local-ref>
 <ejb-ref-name>ejb/Test</ejb-ref-name>
 <ejb-ref-type>Session</ejb-ref-type>
 <local>Test</local>
</ejb-local-ref>

[peterj]

I think you are missing the jndi.properties file. It should contain:

java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.provider.url=jnp://localhost:1099
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces

[davestar]

Thanks Peter!
I no longer get the NoInitialContext exception.
Now when I do a look up with the code

BurdenRateFacade bean = (BurdenRateFacade)context.lookup("BurdenRateFacade");

I get a Classcast exception.

java.lang.ClassCastException: org.jnp.interfaces.NamingContext

I did a

context.lookup("BurdenRateFacade").getClass()

and it prints org.jnp.interfaces.NamingContext

I have the following entries in my jndi.properties

java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
java.naming.provider.url=jnp://localhost:1099

[peterj]

You need to lookup "BurdenRateFacade/remote". Note the full name in the JNDI tree that you posted earlier.

[davestar]

Thanks Peter! it worked

[pepelara]

Hi,

How do I call a local interface?

This is then Global JNDI Namespace from then JMX Console of
JBoss 4.2.2 GA,

+- CalculatorEAR (class: org.jnp.interfaces.NamingContext)
 | +- CalculatorBean (class: org.jnp.interfaces.NamingContext)
 | | +- local (proxy: $Proxy62 implements interface jboss.tutorial.Calculator,interface org.jboss.ejb3.JBossProxy)

and then client is,

package jboss.tutorial;

import java.util.Properties;

import javax.ejb.EJB;
import javax.naming.InitialContext;
import javax.naming.Context;

public class CalculatorClient {

 @EJB
 private static Calculator calculator;

 public CalculatorClient() {
 try {
 Properties props = new Properties();
 props.put("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
 props.put("java.naming.factory.url.pkgs", "jnp://localhost:1099");
 props.put("java.naming.provider.url", "jnp://localhost:1099");
 Context ctx = new InitialContext(props);
 calculator = (Calculator) ctx.lookup("CalculatorBean/local");
 } catch (Exception ex) {
 System.out.println("Couldn’t create calculator bean. "+
 ex.getMessage());
 }
 }

 /**
 * @param args
 */
 public static void main(String[] args) {
 // TODO Auto-generated method stub
 CalculatorClient cClient = new CalculatorClient();

 System.out.println("1 + 1 = " + calculator.add(1, 1));
 System.out.println("1 - 1 = " + calculator.subtract(1, 1));
 }
}

The output gives me the Exception,

Couldn’t create calculator bean. CalculatorBean not bound

Regards,
pepelara

[jaikiran]

ctx.lookup("CalculatorBean/local")

Should be

ctx.lookup("CalculatorEAR/CalculatorBean/local")

[pepelara]

Hi,

It is working ok when I call the remote interface.
I do it as you say. It works fine.

But about the local interface, then console of Eclipse
gives me the following exception,

Caught an unexpected exception!
javax.ejb.EJBException: Invalid (i.e. remote) invocation of local interface (null container)
 at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:80)
 at $Proxy0.add(Unknown Source)
 at jboss.tutorial.CalculatorClient.doOperations(CalculatorClient.java:29)
 at jboss.tutorial.CalculatorClient.main(CalculatorClient.java:45)

This is my new client,

public class CalculatorClient {

 @EJB
 private static Calculator calculator;

 public CalculatorClient() {
 try {
 Properties props = new Properties();
 props.put("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
 props.put("java.naming.factory.url.pkgs", "jnp://localhost:1099");
 props.put("java.naming.provider.url", "jnp://localhost:1099");
 Context ctx = new InitialContext(props);
 calculator = (Calculator) ctx.lookup("CalculatorEAR/CalculatorBean/local");
 } catch (Exception ex) {
 System.out.println("Couldn’t create calculator bean. "+
 ex.getMessage());
 }
 }

 public void doOperations() {
 try {
 System.out.println("1 + 1 = " + calculator.add(1, 1));
 System.out.println("1 - 1 = " + calculator.subtract(1, 1));

 System.exit(0);
 } catch (Exception ex) {
 System.err.println("Caught an unexpected exception!");
 ex.printStackTrace();
 }
 }

 /**
 * @param args
 */
 public static void main(String[] args) {
 // TODO Auto-generated method stub
 CalculatorClient cClient = new CalculatorClient();
 cClient.doOperations();
 }
}

The exception occurs when I call the doOperations() method.

Thanks,
pepelara

[pepelara]

Hi,

Take a look at this post,

http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4105969#4105969

I think he has got the solution.
But I have no idea about what he is saying.

Load balancing and cluster????

Help!

Regards,
pepelara