1 Reply Latest reply on Aug 26, 2010 6:26 AM by Wolfgang Knauf

    Problem with @OneToMany annotation

    dsf qsdf Newbie

      Hello

       

      I have a problem with EJB project which contains the  @OneToMany annotation.

       

      The EJB Entities are "User" and "Privilege". A "Privilege" has many "User".

       

      Here is the source of my EJB Entities:

       

       

      [CODE]
      package entities;
      import java.io.Serializable;
      import java.sql.Date;
      import java.util.Collection;
      import javax.persistence.*;
      @Entity
      public class User implements Serializable {
      @Id
      @Column(name = "UserID")
      private int  UserID;
      private String password;
      private String login;
      private String Name;
      private String gender;
      private String Phone;
      private String Email;
      private String Address;
      private int isActive;
      private Date lastLoginTime;
      @ManyToOne(cascade=CascadeType.ALL)
      @JoinColumn(name = "Privilege_idPrivilege")
      private Privilege privilege;
      public User() {
      super();
      // TODO Auto-generated constructor stub
      }
      public String getPassword() {
      return password;
      }
      public void setPassword(String password) {
      this.password = password;
      }
      public String getName() {
      return Name;
      }
      public void setName(String name) {
      Name = name;
      }
      public String getGender() {
      return gender;
      }
      public void setGender(String gender) {
      this.gender = gender;
      }
      public String getPhone() {
      return Phone;
      }
      public void setPhone(String phone) {
      Phone = phone;
      }
      public String getEmail() {
      return Email;
      }
      public void setEmail(String email) {
      Email = email;
      }
      public String getAddress() {
      return Address;
      }
      public void setAddress(String address) {
      Address = address;
      }
      public int getIsActive() {
      return isActive;
      }
      public void setIsActive(int isActive) {
      this.isActive = isActive;
      }
      public void setLogin(String login) {
      this.login = login;
      }
      public String getLogin() {
      return login;
      }
      public int getUserID() {
      return UserID;
      }
      public void setUserID(int userID) {
      UserID = userID;
      }
      public void setLastLoginTime(Date lastLoginTime) {
      this.lastLoginTime = lastLoginTime;
      }
      public Date getLastLoginTime() {
      return lastLoginTime;
      }
      public Privilege getPrivilege() {
      return privilege;
      }
      public void setPrivilege(Privilege privilege) {
      this.privilege = privilege;
      }
      }
      [/CODE]
      et
      [CODE]
      package entities;
      import java.io.Serializable;
      import java.util.ArrayList;
      import java.util.Collection;
      import javax.persistence.*;
      @Entity
      public class Privilege implements Serializable{
      @Id
      @GeneratedValue(strategy=GenerationType.AUTO)
      private int idPrivilege ;
      private int Level ;
      @OneToMany
      private Collection<User> users = new ArrayList<User>();
      public int getIdPrivilege() {
      return idPrivilege;
      }
      public void setIdPrivilege(int idPrivilege) {
      this.idPrivilege = idPrivilege;
      }
      public int getLevel() {
      return Level;
      }
      public void setLevel(int level) {
      Level = level;
      }
      public Collection<User> getUsers() {
      return users;
      }
      public void setUsers(Collection<User> users) {
      this.users = users;
      }
      }
      [/CODE]

       

       

       

       

       

      In the test application I get the following error message (given that the test app: GestionDeStockClient and "search_user" is a method of the EJB Session that returns User):

       

       

       

      [CODE]Exception in thread "main" java.lang.reflect.UndeclaredThrowableException

      at $Proxy0.search_user(Unknown Source)

      at com.et.GestionDeStockClient.main(GestionDeStockClient.java:30)

      [COLOR="Red"]Caused by: java.lang.ClassNotFoundException: [/COLOR][Ljava.lang.StackTraceElement;

      at java.net.URLClassLoader$1.run(Unknown Source)

      at java.security.AccessController.doPrivileged(Native Method)

      at java.net.URLClassLoader.findClass(Unknown Source)

      at java.lang.ClassLoader.loadClass(Unknown Source)

      at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

      at java.lang.ClassLoader.loadClass(Unknown Source)

      at org.jboss.remoting.loading.RemotingClassLoader.loadClass(RemotingClassLoader.java:50)

      at org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.resolveClass(ObjectInputStreamWithClassLoader.java:139)

      at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)

      at java.io.ObjectInputStream.readClassDesc(Unknown Source)

      at java.io.ObjectInputStream.readArray(Unknown Source)

      at java.io.ObjectInputStream.readObject0(Unknown Source)

      at java.io.ObjectInputStream.defaultReadFields(Unknown Source)

      at java.io.ObjectInputStream.readSerialData(Unknown Source)

      at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)

      at java.io.ObjectInputStream.readObject0(Unknown Source)

      at java.io.ObjectInputStream.defaultReadFields(Unknown Source)

      at java.io.ObjectInputStream.readSerialData(Unknown Source)

      at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)

      at java.io.ObjectInputStream.readObject0(Unknown Source)

      at java.io.ObjectInputStream.defaultReadFields(Unknown Source)

      at java.io.ObjectInputStream.readSerialData(Unknown Source)

      at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)

      at java.io.ObjectInputStream.readObject0(Unknown Source)

      at java.io.ObjectInputStream.defaultReadFields(Unknown Source)

      at java.io.ObjectInputStream.readSerialData(Unknown Source)

      at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)

      at java.io.ObjectInputStream.readObject0(Unknown Source)

      at java.io.ObjectInputStream.readObject(Unknown Source)

      at org.jboss.remoting.serialization.impl.java.JavaSerializationManager.receiveObject(JavaSerializationManager.java:128)

      at org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:66)

      at org.jboss.remoting.transport.socket.SocketClientInvoker.transport(SocketClientInvoker.java:279)

      at org.jboss.remoting.RemoteClientInvoker.invoke(RemoteClientInvoker.java:143)

      at org.jboss.remoting.Client.invoke(Client.java:525)

      at org.jboss.remoting.Client.invoke(Client.java:488)

      at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:55)

      at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)

      at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61)

      at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)

      at org.jboss.aspects.security.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:53)

      at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)

      at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:77)

      at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)

      at org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:102)

      ... 2 more

      [/CODE]

       

       

      thanks

        • 1. Re: Problem with @OneToMany annotation
          Wolfgang Knauf Master

          Hi,

           

          what happens in "com.et.GestionDeStockClient.main(GestionDeStockClient.java:30)"? Unfortunately, the error message does not tell anything about the missing class, so it is hard to say whether this is related to your EJBs.

           

          Could you check that both EJB jar and client JAR contain all class files of your entities, and both use the same versions (same compilation date)?

           

          Best regards

           

          Wolfgang