EJB3 Client Lookup

Question

I am trying to invoke a EJB from a standalone Java client, getting the below error.

Lookup code

String localJNDIName = "ejbremote:gcmsnew/gcmsutilbeans.jar/CustomerSurveyManageQstBean#com.smbcgroup.gcms.utility.bl.survey.CustomerSurveyManageQstRemote";
InitialContext ic = new InitialContext();
GCMSBaseRemote bean = (GCMSBaseRemote)ic.lookup(localJNDIName);

Exception

javax.naming.ConfigurationException: NamingManager.getURLContext cannot find the factory for this scheme: ejbremote at com.ibm.ws.naming.jndicos.CNContextImpl.checkForUrlContext(CNContextImpl.java:471) at com.ibm.ws.naming.util.WsnInitCtx.lookup(WsnInitCtx.java:160) at com.ibm.ws.naming.util.WsnInitCtx.lookup(WsnInitCtx.java:179) at javax.naming.InitialContext.lookup(Unknown Source) at com.test.EJBClientTest.main(EJBClientTest.java:18)

Environment

RAD 7.5, EJB3. Websphere Application Server 7.0.

Brett Kail · Answer 1 · 2011-12-05T15:26:37.770

3

The ejbremote scheme does not exist in WebSphere Application Server (even though "ejblocal" does exist). Try using a ejb/ prefix instead of ejbremote:.

For more information, see the EJB application bindings overview topic in the InfoCenter.

edited Dec 05 '11 at 15:26

answered Dec 01 '11 at 14:58

Brett Kail

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It worked like a magic. Can you give some pointers to some reference reading to understand more on this? – Rafi Dec 01 '11 at 16:48
I've added an InfoCenter link, but let me know if you have other questions. – Brett Kail Dec 05 '11 at 15:26
@BrettKail the link seems to be broken. – Govinda Sakhare Sep 10 '19 at 12:38
It appears IBM broke the link. I am no longer familiar enough with the product to find a replacement. Sorry. – Brett Kail Sep 11 '19 at 00:08

score 1 · Answer 2 · answered Nov 22 '12 at 09:10

Since this is a standalone ("thin") client may be you should try something like this:

   Properties properties = new Properties();
   properties.setProperty(Context.INITIAL_CONTEXT_FACTORY,"com.ibm.websphere.naming.WsnInitialContextFactory");
   properties.setProperty(Context.PROVIDER_URL,"corbaloc:iiop:localhost:2809"); //localhost=the host where your EJB is located, 2809=BOOTSTRAP_ADDRESS port
   Context initCtx = new InitialContext(properties);
   Object homeObject = initCtx.lookup("com.smbcgroup.gcms.utility.bl.survey.CustomerSurveyManageQstRemote"); //by default the JNDI name of your Remote Interface is its full class name
   // Narrow to a real object
   csmo = (CustomerSurveyManageQstRemote) javax.rmi.PortableRemoteObject.narrow(homeObject, com.smbcgroup.gcms.utility.bl.survey.CustomerSurveyManageQstRemote.class);

You should also have the appropriate Websphere Jars in your classpath in order to make the above calls.

I have using other names like, java:global, ejblocal, those didnt work and giving some weird errors. This worked for me .initCtx.lookup("com.smbcgroup.gcms.utility.bl.survey.CustomerSurveyManageQstRemote"); //by default the JNDI name of your Remote Interface — awsbz77, May 24 '13 at 17:23

score 1 · Answer 3 · answered Jun 05 '13 at 09:28

For remote lookup

import java.io.IOException;
import java.util.Hashtable;  
import javax.naming.InitialContext;
import javax.naming.NamingException;

public class ServiceLocator {
    static String url = "corbaloc:iiop:localhost:2809";
    static String initial = "com.ibm.websphere.naming.WsnInitialContextFactory";  
    static String jndi = "ejb/enterprise_app_name/ejb_web_project_name.jar/ejb_name#name.of.remote.impl.interface";


    private static ServiceLocator serviceLocator = null;  

    InitialContext context = null;

    private ServiceLocator() throws NamingException, IOException { 

        Hashtable<String,String> env = new Hashtable<String,String> (); 
        env.put("java.naming.provider.url",  url ); 
        env.put("java.naming.factory.initial",  initial );
        context = new InitialContext(env);
    }

    public synchronized static ServiceLocator getInstance() throws NamingException, IOException {

        if (serviceLocator == null) {
            serviceLocator = new ServiceLocator(); 
        }

        return serviceLocator;
    }  

    public Object getService(String jndiName) throws NamingException {
        return context.lookup(jndiName); 
    }

    public <T>T getRemoteObject(Class<T> remoteInterfaceClass) {
        try {

            return (T)javax.rmi.PortableRemoteObject.narrow( context.lookup(jndi), remoteInterfaceClass);

        } catch (NamingException nexc) {

            nexc.printStackTrace(); 

        }
        return null;
    }

}

For local lookup

import java.io.IOException;
import java.util.Hashtable;  
import javax.naming.InitialContext;
import javax.naming.NamingException;

public class ServiceLocator {
    static String url = "iiop://localhost";
    static String initial = "com.ibm.websphere.naming.WsnInitialContextFactory";  
    static String jndi = "ejblocal:enterprise_app_name/ejb_web_project_name.jar/ejb_name#name.of.local.impl.interface";



    private static ServiceLocator serviceLocator = null;  

    InitialContext context = null;

    private ServiceLocator() throws NamingException, IOException { 

        Hashtable<String,String> env = new Hashtable<String,String> (); 
        env.put("java.naming.provider.url",  url ); 
        env.put("java.naming.factory.initial",  initial );
        context = new InitialContext(env);
    }

    public synchronized static ServiceLocator getInstance() throws NamingException, IOException {

        if (serviceLocator == null) {
            serviceLocator = new ServiceLocator(); 
        }

        return serviceLocator;
    }  

    public Object getService(String jndiName) throws NamingException {
        return context.lookup(jndiName); 
    }

    public Object getService() throws NamingException {
        return context.lookup(jndi); 
    }

}

score 0 · Answer 4 · edited Dec 02 '11 at 11:59

0

You need to have the stub file to invoke the EJB, so first generate the stub file. In websphere there is utility available in the appserver bin folder createEJBStubs.

edited Dec 02 '11 at 11:59

stealthyninja

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answered Dec 02 '11 at 10:10

Rafi

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EJB3 Client Lookup

4 Answers4

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