Probleme mit Beans

[Henryfranken]

Java EE 5
ejb 3.0
Glassfish v2.1
eclipse


Hello guys, I started to learn Java Enterprise Beans. At the beginning, I decided to create a (stateful) Bean, which can add a new user into a simple table. The table is realize by an entity bean, which I created with the help of Eclipse and JPA. Via Eclipse I integrated one table from an existing postgresql database. While Eclipse was generating entity beans, a wizard required some informations about the database. I committed the following informations:

Database, mytestdb
URL, jbdcostgresql:mytestdb
Username, my name
password, 123456

I apply the following jdbc driver: postgresql-8.3-605.jdbc2ee.jar
a short connection test answers o.k


Before Eclipse generated resources, I was creating the persistence.xml file in a very simple way.

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
   version="1.0">
   <persistence-unit name="Test">
   

   </persistence-unit>
</persistence>

When Eclipse JPA-Wizard was finished, the requested resources were being build. The persistence.xml was being included the class tags of the entity beans.

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
   version="1.0">
   <persistence-unit name="Test">
   	<class>org.ejb.entity.Customer</class>
   	<class>org.ejb.entity.Order</class>
   	<class>org.ejb.entity.OrderPK</class>

   </persistence-unit>
</persistence>

Now, please take a quick look at the ejb, jndi-connection

Here you see the remote interface (RemoteInterface2.java) for the ejb:

package org.ejb.stateful;

import javax.ejb.Remote;


@Remote
public interface RemoteInterface2 {
	
	public String getTest();
	public String getTest2();
	public void setTest(String Eingabe);

}

the belonging stateful enterprise bean:

package org.ejb.stateful;

import javax.ejb.Stateful;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;

import org.ejb.entity.Customer;

@Stateful
public class Bean implements RemoteInterface2 {
		
	private EntityManagerFactory emf;
	private EntityManager manager;
	private EntityTransaction tx;

	
	public String getTest() {
		// TODO Auto-generated method stub
		return "Hello Wolrd";
				
	}
	public String getTest2(){
		return "Hello World, again";
	}

	public void setCustomer() {
		
        
		this.emf = Persistence.createEntityManagerFactory("Test");
		this.manager= emf.createEntityManager();
		this.tx=manager.getTransaction();
		this.tx.begin();
			Customer c = new Customer();
			
			c.setVorname("dummy");
			c.setTelefon("002330324");
			c.setEmail("dummymailaddress");
				
			manager.persist(c);
			
		this.tx.commit();
		this.manager.close();		
	}
}

entity bean:

package org.ejb.entity;

import java.io.Serializable;
import javax.persistence.*;
import java.util.Set;


/**
 * The persistent class for the customer database table.
 * 
 */
@Entity
public class Customer implements Serializable {
	private static final long serialVersionUID = 1L;

	@Id
	@GeneratedValue(strategy=GenerationType.AUTO)
	private Integer cid;

	private Boolean anrede;

	private String email;

	private String name;

	private String telefon;

	private String vorname;

	//bi-directional many-to-one association to Order
	@OneToMany(mappedBy="customer")
	private Set<Order> orders;

    public Customer() {
    }
	public Integer getCid() {
		return this.cid;
	}

	public void setCid(Integer cid) {
		this.cid = cid;
	}

	public Boolean getAnrede() {
		return this.anrede;
	}

	public void setAnrede(Boolean anrede) {
		this.anrede = anrede;
	}

	public String getEmail() {
		return this.email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public String getName() {
		return this.name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getTelefon() {
		return this.telefon;
	}
	public void setTelefon(String telefon) {
		this.telefon = telefon;
	}
	public String getVorname() {
		return this.vorname;
	}

	public void setVorname(String vorname) {
		this.vorname = vorname;
	}

	public Set<Order> getOrders() {
		return this.orders;
	}

	public void setOrders(Set<Order> orders) {
		this.orders = orders;
	}
}

After Eclipse deployed, I injected my ejb application (E.jar) into Glassfish V2.1.
I was tried to apply my ejb through a client application. (C.jar)
here you see the the main – methode of the client-app,

import javax.ejb.EJB;
import javax.rmi.PortableRemoteObject;

import org.ejb.stateful.RemoteInterface2;

public class Main {
	
    @EJB
    private static RemoteInterface2 b;

	public static void main(String[] args){
		StandardContex();
	
	}	
	public static void StandardContex(){	
		try{
			InitialContext context = new InitialContext();
	        b= (RemoteInterface2)context.lookup(RemoteInterface2.class.getName());         
	        
	        System.out.println("thats okay "+context.lookup(RemoteInterface2.class.getName()));
	        System.out.println(b.getTest());
	     
	        b.setCustomer();
	        	        
	        context.close();        
			}catch (NamingException e){
				
			}		
	}
}

If I execute the main class, the getTest methods doing right but the setCustomer methode generats a lot of exceptions. Remember, the setCustomer methode accesses on entity beans.

Here you see the Exceptions:

Exception in thread "main" javax.ejb.EJBException: nested exception is: java.rmi.RemoteException: CORBA BAD_OPERATION 1398079720 No; nested exception is: 
	org.omg.CORBA.BAD_OPERATION: ----------BEGIN server-side stack trace----------
org.omg.CORBA.BAD_OPERATION:   vmcid: SUN  minor code: 232  completed: No
	at com.sun.corba.ee.impl.logging.ORBUtilSystemException.methodNotFoundInTie(ORBUtilSystemException.java:699)
	at com.sun.corba.ee.impl.logging.ORBUtilSystemException.methodNotFoundInTie(ORBUtilSystemException.java:723)
	at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:806)
	at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.dispatch(CorbaMessageMediatorImpl.java:563)
	at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.doWork(CorbaMessageMediatorImpl.java:2567)
	at com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:555)

----------END server-side stack trace----------  vmcid: SUN  minor code: 232  completed: No
java.rmi.RemoteException: CORBA BAD_OPERATION 1398079720 No; nested exception is: 
	org.omg.CORBA.BAD_OPERATION: ----------BEGIN server-side stack trace----------
org.omg.CORBA.BAD_OPERATION:   vmcid: SUN  minor code: 232  completed: No
	at com.sun.corba.ee.impl.logging.ORBUtilSystemException.methodNotFoundInTie(ORBUtilSystemException.java:699)
	at com.sun.corba.ee.impl.logging.ORBUtilSystemException.methodNotFoundInTie(ORBUtilSystemException.java:723)
	com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.dispatch(CorbaMessageMediatorImpl.java:563)
	at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.doWork(CorbaMessageMediatorImpl.java:2567)
	at com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:555)

----------END server-side stack trace----------  vmcid: SUN  minor code: 232  completed: No
	at com.sun.corba.ee.impl.javax.rmi.CORBA.Util.mapSystemException(Util.java:364)
	at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:205)
	at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:152)
	at com.sun.corba.ee.impl.presentation.rmi.bcel.BCELStubBase.invoke(BCELStubBase.java:225)
	at org.ejb.stateful.__RemoteInterface2_Remote_DynamicStub.setCustomer(org/ejb/stateful/__RemoteInterface2_Remote_DynamicStub.java)
	at org.ejb.stateful._RemoteInterface2_Wrapper.setCustomer(org/ejb/stateful/_RemoteInterface2_Wrapper.java)
	at Main.StandardContex(Main.java:48)
	at Main.main(Main.java:32)
Caused by: org.omg.CORBA.BAD_OPERATION: ----------BEGIN server-side stack trace----------
org.omg.CORBA.BAD_OPERATION:   vmcid: SUN  minor code: 232  completed: No
	
	at [...]

javax.ejb.EJBException: nested exception is: java.rmi.RemoteException: CORBA BAD_OPERATION 1398079720 No; nested exception is: 
	org.omg.CORBA.BAD_OPERATION: ----------BEGIN server-side stack trace----------
org.omg.CORBA.BAD_OPERATION:   vmcid: SUN  minor code: 232  completed: No
	at [..]

----------END server-side stack trace----------  vmcid: SUN  minor code: 232  completed: No
	at org.ejb.stateful._RemoteInterface2_Wrapper.setCustomer(org/ejb/stateful/_RemoteInterface2_Wrapper.java)
	at Main.StandardContex(Main.java:48)
	at Main.main(Main.java:32)

Maybe persistence.xml provoks this Exceptions because the xml file is probably not correctly create but i'm not sure. I was only followed an tutorial about ejb. Probably I have unconsidered an important step. I'm very thankful when someone will helps me.

[Christian Marquardt]

Die Forensprache hier ist deutsch

In der Bean fehlt der @PersistenzContext