JPA - NoClassDefFoundError: jpa/County (EmbeddedId)

[Jack Bush]

Hi All,

I am coming across a NoClassDefFoundError: jpa/County below when trying to instantiate a JPA with EmbeddedId:

02/05/2010 10:45:48 PM com.sun.enterprise.appclient.MainWithModuleSupport <init>
WARNING: ACC003: Application threw an exception.
java.lang.NoClassDefFoundError: jpa/County
at client.addCounties(addCounties.java:8)The following are the relevant code snippets:

package jpa;

import definition.State; // EnumType

@Embeddable
public class CountyPK implements Serializable {
    @Basic(optional = false)
    @Column(name = "CODE", nullable = false, length = 255)
    private String zipcode;
    @Basic(optional = false)
    @Column(name = "DISTRICT", nullable = false, length = 255)
    private String district;
    @Basic(optional = false)
    @Column(name = "DISTRICT_STATE", nullable = false, length = 255)
    private State state;

    public CountyPK(String zipcode, String district, State state) {
        this.zipcode = zipcode;
        this.district = district;
        this.state = state;
    }
}


public class County implements Serializable {
    @EmbeddedId
    protected CountyPK countyPK;

    public County(CountyPK countyPK) {
        this.countyPK = countyPK;
    }

    public County(String zipcode, String district, State state) {
        this.countyPK = new CountyPK(zipcode, district, state);
    }
}

package jpacontroller;

public class CountyJpaController {
    @Resource
    private UserTransaction utx = null;
    @PersistenceUnit(unitName = "CountyDB-PU")
    private EntityManagerFactory emf = null;

    public EntityManager getEntityManager() {
        return emf.createEntityManager();
    }

    public void create(County county) throws PreexistingEntityException, RollbackFailureException, Exception {
        if (county.getCountyPK() == null) {
            county.setCountyPK(new CountyPK());
        }
        EntityManager em = null;
        try {
            utx.begin();
            em = getEntityManager();
            ………..
            county.setTemperature(42);
            em.persist(county);
            utx.commit();
        } finally {
            if (em != null) {
                em.close();
            }
        }
    }

package client;

import jpa.County;
import jpa.CountyPK;
import jpacontroller.CountyJpaController;

import definition.State; // EnumType

public class addCounties {

    public static void main(String[] args)
    {
1.      // CountyPK countyPK = new CountyPK(123456, Fairyland, Enum.valueOf(State.class, CA));
2.      // County county = new County(123456, Fairyland, Enum.valueOf(State.class, CA));  
3.      // County county = new County(new CountyPK(123456, Fairyland, Enum.valueOf(State.class, CA)));
4.      /*  CountyPK countyPK = new CountyPK();
5.           countyPK.setZipcode(123456);
6.           countyPK.setDistrict(Fairyland);
7.           countyPK.setState(Enum.valueOf(State.class, CA));      */
8.      County county = new County();
9.      county.setCountyPK(new CountyPK(123456, Fairyland, Enum.valueOf(State.class, CA)));
10.    CountyJpaController jpaController = new CountyJpaController();
11.    jpaController.create(county);
    }
}

Can someone please provide advice on how to properly instantiate County entity without getting NoClassDefFoundError: jpa/County? I have tried all combinations between line 1 – 7 without success.

I am using JDK1.6.0_23, GF2.1 on Windows 7.

Thanks in advance,

Jack

[Paul Sturrock]

This is a NoClassDefFoundError, which suggests the classpath is wrong.

[Jack Bush]

Hi Paul,

Thank you for offerring advice to this threat.

I managed to re-create the whole Java EE 5 project from scratch and can confirm that County is part of CountyConsumer-ejb has been included in the CLASSPATH of CountyConsumer-app-client but it did not make any difference. Below is the CLASSPATH segment of CountyConsumer-app-client in nbproject/project.properties (Netbeans 6.9.1):

file.reference.NationalGeography.jar=C:\\Users\\jack\\NationalGeography\\dist\\NationalGeography.jar  // definition.State
file.reference.CountyConsumer-ejb.jar=..\\CountyConsumer-ejb\\dist\\CountyConsumer-ejb.jar

I am wondering whether this lost of access/visibility of County from client.AddCounties() is due to the fact that it is an Application Client which is in a different container? Also find it strange to see the names of 2 old packages (domain, ejb) already been deleted and could not find them in any of the codes or configuration files.

Any suggestion?

Thanks,

Jack