Creating java Client for Simple EJB
I have a simple EJB HelloWorld.jar and it gets deployed successfully, but when I run a java client for that EJB, I get error as follows:
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C:\jboss-3.0.4\client>java -classpath .;jboss-j2ee.jar com.vigorsoft.ejb.HelloClient
in HelloClient
in HelloClient 1
in HelloClient 2
in HelloClient 3
Exception in thread "main" javax.naming.NoInitialContextException: Need to specify class name in
environment or system property, or as an applet parameter, or in an application resource file:
java.naming.factory.initial
at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.lookup(Unknown Source)
at com.vigorsoft.ejb.HelloClient.main(HelloClient.java:44)
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My Client and EJB files are as follows:
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Client.java
package com.vigorsoft.ejb;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;
import java.util.Properties;
public class HelloClient {
public static void main(String args[]) throws Exception {
System.out.println("in HelloClient");
Properties props = System.getProperties();
System.out.println("in HelloClient 1");
Context ctx = new InitialContext(props);
System.out.println("in HelloClient 2 ");
//Object ob = ctx.addToEnvironment("HelloHome",HelloHome.class);
System.out.println("in HelloClient 3 ");
Object obj = ctx.lookup("HelloHome");
//I also tried using Object obj = ctx.lookup("Hello"), but same result
System.out.println("in HelloClient 4");
HelloHome home = (HelloHome)
PortableRemoteObject.narrow(
obj,HelloHome.class);
System.out.println("in HelloClient 5");
Hello hello = home.create();
System.out.println("in HelloClient 6");
System.out.println(hello.hello());
}
}
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HelloHome.java (home interface)
package com.vigorsoft.ejb;
import javax.ejb.EJBHome;
import java.rmi.RemoteException;
import javax.ejb.CreateException;
import javax.ejb.EJBException;
public interface HelloHome extends EJBHome{
//This method creates an EJB Object and returns that Object
Hello create() throws EJBException, RemoteException, CreateException;
}
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Hello.java (remote interface)
package com.vigorsoft.ejb;
import javax.ejb.EJBObject;
import java.rmi.RemoteException;
public interface Hello extends EJBObject{
// This method returns a greeting to client
public String hello() throws RemoteException;
}
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HelloBean.java
package com.vigorsoft.ejb;
import java.rmi.RemoteException;
import javax.ejb.EJBException;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
public class HelloBean implements SessionBean {
public void ejbCreate() throws EJBException, RemoteException {
System.out.println("ejbCreate()");
}
public void ejbActivate() throws EJBException, RemoteException {
System.out.println("ejbActivate()");
}
public void ejbPassivate() throws EJBException, RemoteException {
System.out.println("ejbActivate()");
}
public void ejbRemove() throws EJBException, RemoteException {
System.out.println("ejbActivate()");
}
public void setSessionContext(SessionContext arg0)
throws EJBException, RemoteException {
}
public String hello(){
System.out.println("in hello method of bean");
return("Hello World");
}
}
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ejb-jar.xml in META-INF directory parallal to com directory
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE jboss PUBLIC "-//JBoss//DTD JBOSS 2.4//EN" "http://www.jboss.org/j2ee/dtd/jboss_2_4.dtd">
<ejb-jar>
<enterprise-beans>
<ejb-name>Hello</ejb-name>
com.vigorsoft.ejb.HelloHome
com.vigorsoft.ejb.Hello
<ejb-class>com.vigorsoft.ejb.HelloBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
</enterprise-beans>
</ejb-jar>
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Please help me to solve this error..
Thanks,
Vishal
