Problem with an easy example
I've a problem with a very simple "application" I'm writing to understand EJB3.
I've a Session Stateless Bean (there'a a method called service that receive a String and returns a String) and a command-line java client that calls this method.
Here is the code:
mainpkg/SessionStateless.java
package mainpkg;
import javax.ejb.Remote;
@Remote
public interface SessionStateless {
public String service(String s);
}mainpkg/SessionStatelessBean.java
package mainpkg;
import javax.ejb.Stateless;
import mainpkg.SessionStateless;
public @Stateless class SessionStatelessBean implements SessionStateless {
public String service(String s) {
return s + "World";
}
}clientpkg.client.java
package clientpkg;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import java.rmi.RMISecurityManager;
import mainpkg.SessionStateless;
public class Client {
private SessionStateless SSbean;
private String str;
public Client(String cl) {str=cl;}
public void init() {
try {
if (System.getSecurityManager() == null) {
System.setSecurityManager(new RMISecurityManager());
}
Context context = new InitialContext();
String sss = SessionStateless.class.getName();
Object ssr = context.lookup(sss);
SSbean = (SessionStateless) ssr;
} catch (NamingException e) {
e.printStackTrace();
}
}
public String add() {
return SSbean.service(str);
}
public static void main(String[] args) {
Client client = new Client(args[0]);
client.init();
System.out.println(client.add());
}
}java.security.policy (otherwise I get SecurityException when I try to connect)
grant {
permission java.security.AllPermission;
};When I package the ejb3 file I have the 2 SessionStateless(Bean).class files inside mainpkg folder, and the META-INF folder with MANIFEST.MF inside.
When I deploy I've got this message from jboss-4.0.3:
18:31:05,486 INFO [JaccHelper] Initialising JACC Context for deployment: test-ejb3.ejb3
18:31:05,666 INFO [Ejb3AnnotationHandler] found EJB3: ejbName=mainpkg.SessionStatelessBean, class=mainpkg.SessionStatelessBean, type=STATELESS
18:31:05,767 INFO [JaccHelper] mainpkg.SessionStatelessBean has no @SecurityDomain - skipping JACC configuration
18:31:05,767 INFO [JaccHelper] JACC Policy Configuration for deployment has been put in service
18:31:05,767 INFO [Ejb3Deployment] EJB3 deployment time took: 281
18:31:05,897 INFO [ProxyDeployer] no declared remote bindings for : mainpkg.SessionStatelessBean
18:31:05,897 INFO [ProxyDeployer] there is remote interfaces for mainpkg.SessionStatelessBean
18:31:05,897 INFO [ProxyDeployer] default remote binding has jndiName of mainpkg.SessionStateless
18:31:06,097 INFO [EJB3Deployer] Deployed: file:/C:/Programmi/jboss-4.0.3/server/all/deploy/test-ejb3.ejb3
When I execute Client.java with a String and with -Djava.security.policy=path_to_my_java.security.policy option, I get this error:
javax.naming.CommunicationException [Root exception is java.lang.ClassNotFoundException: org.jboss.proxy.ejb.EJBMetaDataImpl]
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:713)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:572)
at javax.naming.InitialContext.lookup(InitialContext.java:351)
at clientpkg.Client.init(Client.java:23)
at clientpkg.Client.main(Client.java:36)
Caused by: java.lang.ClassNotFoundException: org.jboss.proxy.ejb.EJBMetaDataImpl
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:242)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:430)
at sun.rmi.server.LoaderHandler.loadClass(LoaderHandler.java:165)
at java.rmi.server.RMIClassLoader$2.loadClass(RMIClassLoader.java:620)
at java.rmi.server.RMIClassLoader.loadClass(RMIClassLoader.java:247)
at sun.rmi.server.MarshalInputStream.resolveClass(MarshalInputStream.java:197)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1538)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1460)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1693)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at java.rmi.MarshalledObject.get(MarshalledObject.java:135)
at org.jnp.interfaces.MarshalledValuePair.get(MarshalledValuePair.java:57)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:637)
... 4 more
Exception in thread "main" java.lang.NullPointerException
at clientpkg.Client.add(Client.java:31)
at clientpkg.Client.main(Client.java:37)
The exception in when executing this line in Client.java: "Object ssr = context.lookup(sss);"
What can I do?
Thanks a lot!
