Java EE (Java Enterprise Edition) General Discussion

Hi, all,

I am new in EJB and trying to run my first EJB application under JBOSS. This example is very simple:

Home interface (AdderHome.java):
-----------------------------------------------

package adder;

import java.rmi.RemoteException;
import javax.ejb.CreateException;
import javax.ejb.EJBHome;

public interface AdderHome extends EJBHome{
Adder create() throws RemoteException, CreateException;
}

Remote interface(Adder.java):
-----------------------------------------

package adder;

import java.rmi.RemoteException;
import javax.ejb.EJBObject;

public interface Adder extends EJBObject{
public int add(int a, int b) throws RemoteException;
}

Bean class (AdderBean.java):
----------------------------------------

package adder;

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

public class AdderBean implements SessionBean{

private static final long serialVersionUID = 1L;

public int add(int a, int b){
System.out.println("AdderBean result:");
return(a+b);
}

public void ejbCreate(){};
public void ejbRemove(){};
public void ejbActivate(){};
public void ejbPassivate(){};

public void setSessionContext(SessionContext sc){}
}

Deployment descriptor (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>
<description>My first EJB application</description>
<display-name>Adder application</display-name>
<enterprise-beans>
<session>
<ejb-name>Adder</ejb-name>
<home>adder.AdderHome</home>
<remote>adder.Adder</remote>
<ejb-class>adder.AdderBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Bean</transaction-type>
</session>
</enterprise-beans>
</ejb-jar>

I been copied adder.jar file to default/deploy folder (JBOSS). But when I start JBOSS I have a message:

Bean : Adder
Section: 22.2
Warning: The Bean Provider must specify the fully-qualified name of the Java class that implements the enterprise bean's business methods in the <ejb-class> element.
Info : Class not found on 'adder.AdderBean': No ClassLoaders found for: adder.AdderBean

13:06:55,359 ERROR [MainDeployer] Could not create deployment: file:/C:/jboss-4.0.3/server/default/deploy/adder.jar
org.jboss.deployment.DeploymentException: Verification of Enterprise Beans failed, see above for error messages.
at org.jboss.ejb.EJBDeployer.create(EJBDeployer.java:575)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:118)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:127)
at org.jboss.mx.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:80)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
at $Proxy24.create(Unknown Source)
at org.jboss.deployment.MainDeployer.create(MainDeployer.java:935)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:789)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:753)
at sun.reflect.GeneratedMethodAccessor51.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:118)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:127)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
at $Proxy9.deploy(Unknown Source)
at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:319)
at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:507)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:192)
at org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentScanner.java:265)
at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:274)
at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:230)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:943)
at $Proxy0.start(Unknown Source)
at org.jboss.system.ServiceController.start(ServiceController.java:428)
at sun.reflect.GeneratedMethodAccessor10.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
at $Proxy4.start(Unknown Source)
at org.jboss.deployment.SARDeployer.start(SARDeployer.java:285)
at org.jboss.deployment.MainDeployer.start(MainDeployer.java:989)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:790)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:753)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:737)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:118)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:127)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
at $Proxy5.deploy(Unknown Source)
at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:453)
at org.jboss.system.server.ServerImpl.start(ServerImpl.java:330)
at org.jboss.Main.boot(Main.java:187)
at org.jboss.Main$1.run(Main.java:438)
at java.lang.Thread.run(Thread.java:534)
13:06:55,421 INFO [TomcatDeployer] deploy, ctxPath=/jmx-console, warUrl=.../deploy/jmx-console.war/
13:06:55,687 ERROR [URLDeploymentScanner] Incomplete Deployment listing:

--- Incompletely deployed packages ---
org.jboss.deployment.DeploymentInfo@74d8ebd5 { url=file:/C:/jboss-4.0.3/server/default/deploy/adder.jar }
deployer: MBeanProxyExt[jboss.ejb:service=EJBDeployer]
status: Deployment FAILED reason: Verification of Enterprise Beans failed, see above for error messages.
state: FAILED
watch: file:/C:/jboss-4.0.3/server/default/deploy/adder.jar
altDD: null
lastDeployed: 1146020815156
lastModified: 1146020815140

What is the problem?
I will be appreciated for any answer.