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error while running EJB from java client on JBOSS

gagan narula
Greenhorn

Joined: Nov 05, 2006
Posts: 18
Hi

As i am new to EJB i have created a helloworld application in ejb which is working fine when i try to call it from servlet but when i try to invoke the same ejb from java client (i.e from diff jvm) on jboss i got the following error:

javax.naming.CommunicationException: Could not obtain connection to any of these urls: localhost:1099 and discovery failed with error: javax.naming.CommunicationException: Receive timed out [Root exception is java.net.SocketTimeoutException: Receive timed out] [Root exception is javax.naming.CommunicationException: Failed to connect to server localhost:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is java.net.ConnectException: Connection refused]]]
at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1399)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:579)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:572)
at javax.naming.InitialContext.lookup(InitialContext.java:351)
at com.gl.TestClient.main(TestClient.java:39)
Caused by: javax.naming.CommunicationException: Failed to connect to server localhost:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is java.net.ConnectException: Connection refused]]
at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:254)
at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1370)
... 4 more
Caused by: javax.naming.ServiceUnavailableException: Failed to connect to server localhost:1099 [Root exception is java.net.ConnectException: Connection refused]
at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:228)
... 5 more
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:519)
at java.net.Socket.connect(Socket.java:469)
at java.net.Socket.<init>(Socket.java:366)
at java.net.Socket.<init>(Socket.java:266)
at org.jnp.interfaces.TimedSocketFactory.createSocket(TimedSocketFactory.java:69)
at org.jnp.interfaces.TimedSocketFactory.createSocket(TimedSocketFactory.java:62)
at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:224)
... 5 more

Following is my code:

Home Interface:

package com.gl;

import javax.ejb.CreateException;

public interface testHome extends EJBHome {
String JNDI_NAME = "testBean";
public test create()
throws java.rmi.RemoteException,CreateException;
}

Remote Interface:

package com.gl;

import java.rmi.RemoteException;

import javax.ejb.EJBObject;

public interface test extends EJBObject {
public String welcomeMessage() throws RemoteException;
}

Bean:

package com.gl;

import java.rmi.RemoteException;

import javax.ejb.EJBException;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;

public class testbean implements SessionBean {

public void ejbActivate() throws EJBException, RemoteException {
// TODO Auto-generated method stub

}

public void ejbPassivate() throws EJBException, RemoteException {
// TODO Auto-generated method stub

}

public void ejbRemove() throws EJBException, RemoteException {
// TODO Auto-generated method stub

}

public void setSessionContext(SessionContext arg0) throws EJBException,
RemoteException {
// TODO Auto-generated method stub

}

public void ejbCreate(){}

public String welcomeMessage(){
return "Welcome to the World of EJB";
}

}

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>
<enterprise-beans>
<session>
<ejb-name>testBean</ejb-name>
<home>com.gl.testHome</home>
<remote>com.gl.test</remote>
<ejb-class>com.gl.testbean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
</session>
</enterprise-beans>
</ejb-jar>

jboss.xml:

<?xml version='1.0' ?>
<!DOCTYPE jboss PUBLIC "-//JBoss//DTD JBOSS 3.2//EN" "http://www.jboss.org/j2ee/dtd/jboss_3_2.dtd">
<jboss>
<enterprise-beans>
<entity>
<ejb-name>testBean</ejb-name>
<jndi-name>testBean</jndi-name>
</entity>
</enterprise-beans>
</jboss>

Client code:

package com.gl;

import java.util.Properties;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;

public class TestClient {

public static void main(String[] args) throws Exception{

try{
/* Properties props=new Properties();
props.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
props.put(Context.URL_PKG_PREFIXES, "org.jboss.naming rg.jnp.interfaces");
props.put(Context.PROVIDER_URL, "jnp://localhost:1099");
*/

Properties props = new Properties();
props.put(Context.INITIAL_CONTEXT_FACTORY,
"org.jnp.interfaces.NamingContextFactory");
props.put(Context.PROVIDER_URL, "localhost:1099");

System.out.println("Properties ok");

//env.setProperty(Context.INITIAL_CONTEXT_FACTORY,"org.jboss.naming.HttpNamingContextFactory");
//env.put(Context.PROVIDER_URL,"http://localhost:8080");
//env.put(Context.SECURITY_PRINCIPAL, "");
//env.put(Context.SECURITY_CREDENTIALS, "");


Context ctx=new InitialContext(props);
System.out.println("context ok");
//testHome home = (testHome)ctx.lookup("testBean");
Object obj = ctx.lookup ("testBean");
System.out.println("ojb = " + obj);

testHome ejbHome = (testHome)PortableRemoteObject.narrow(obj,testHome.class);
test ejbObject = ejbHome.create();
String message = ejbObject.welcomeMessage();
System.out.println("home ok");

System.out.println("remote ok");

System.out.println(message);


}

catch(Exception e){e.printStackTrace();}

}

}

I am able to successfully deployed my ejb on JBOSS but i m getting above error when i am trying to invoke ejb from java client.

I have also added the jar file of ejb in class path of client.

kindly suggest me something to solve this issue.

Regards
Gagan
aleem khan
Ranch Hand

Joined: Aug 07, 2008
Posts: 94
I wonder why are you still using EJB 2.0 , go for EJB 3.0 it is more simpler


SCJP(1.4), SCWCD, Oracle 9i SQL certified, Oracle PLSQL Developer Certified Associate
 
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