Using JNDI to make EJB Find MySQL DataBase

Question

Hello, I'm new to EJB, and I'm trying to develop a Entity EJB which will retrieve data from a simple MySQL table. Though I'm getting this exception: javax.naming.NoInitialContextException
scale is the name of my DB.
try {
    initialContext = new InitialContext();
    Object homeObject = initialContext.lookup( "java:comp/env/jdbc/scale" );
    exemploHome = ( EntityExemploHome )PortableRemoteObject.narrow( homeObject, EntityExemploHome.class );
  }catch(NamingException namingException){
    namingException.printStackTrace( System.err );
  }I dont figure how this simple String should make the EJB find my database, i dont know if I deployed wrong (Used the deploytool). Further the code od the EJB Impl Class:
import java.sql.*;
import java.rmi.RemoteException;
import javax.ejb.*;
import javax.sql.*;
import javax.naming.*;
public class EntityExemploEJB implements EntityBean{
  private EntityContext entityCont;
  private Connection con;
  private Integer condCNPJ;
  private String condNome;
  public Integer getCondCNPJ(){
    return condCNPJ;
  public void setCondNome( String nome ){
    condNome = nome;
  public String getCondNome(){
    return condNome;
  public Integer ejbCreate( Integer primaryKey )throws CreateException{
    condCNPJ = primaryKey;
    // INSERT
    try {
      Statement statement = con.createStatement();
      String insert = "INSERT INTO Condominio (condCNPJ) VALUES ("+condCNPJ.intValue()+")";
      statement.executeUpdate(insert);
      return condCNPJ;
    }catch ( SQLException sqlException ) {
      throw new CreateException( sqlException.getMessage());
  }//FIM ejbCreate
  public void ejbPostCreate( Integer primaryKey ) {}
  public void ejbStore() throws EJBException{// UPDATE
    try {
      Integer primaryKey = (Integer)entityCont.getPrimaryKey();
      Statement statement = con.createStatement();
      // create UPDATE statement
      String update = "UPDATE Condominio SET condNome WHERE condCNPJ = "+primaryKey.intValue();
      statement.executeUpdate(update);
    }catch(SQLException sqlException){
      throw new EJBException( sqlException );
  }//FIM ejbStore
  public void ejbLoad() throws EJBException{
    try {
      Integer primaryKey = (Integer) entityCont.getPrimaryKey();
      Statement statement = con.createStatement();
      String select = "SELECT * FROM Condominio WHERE condCNPJ = "+primaryKey.intValue();
      ResultSet resultSet = statement.executeQuery(select);
      if (resultSet.next()) {
        condCNPJ = new Integer( resultSet.getInt( "condCNPJ" ));
        condNome = resultSet.getString("condNome");
      }else
        throw new EJBException( "No such employee." );
    }catch ( SQLException sqlException ) {
      throw new EJBException( sqlException );
}//FIM ejbLoad
public Integer ejbFindByPrimaryKey(Integer primaryKey)throws FinderException, EJBException {
  try {
    Statement statement = con.createStatement();
    String select = "SELECT condCNPJ FROM Condominio WHERE condCNPJ = "+primaryKey.intValue();
    ResultSet resultSet = statement.executeQuery(select);
    if(resultSet.next()){
       resultSet.close();
       statement.close();
        return primaryKey;
    }//throw ObjectNotFoundException if SELECT produces no records
    else
      throw new ObjectNotFoundException();
  }catch ( SQLException sqlException ) {
    throw new EJBException( sqlException );
}//FIM ejbFindByPrimaryKey
public void setEntityContext( EntityContext context )throws EJBException{
  // set entityContext
  entityCont = context;
  try {
    InitialContext initialContext = new InitialContext();
    // get DataSource reference from JNDI directory
    DataSource dataSource = ( DataSource ) initialContext.lookup( "java:comp/env/jdbc/escala" );
    // get Connection from DataSource
    con = dataSource.getConnection();
  }catch ( NamingException namingException ) {
    throw new EJBException( namingException );
  }catch ( SQLException sqlException ) {
    throw new EJBException( sqlException );
}//FIM setEntityContext
public void unsetEntityContext() throws EJBException{
    entityCont = null;
    // close DataSource Connection
    try {
      con.close();
    }catch( SQLException sqlException ) {
      throw new EJBException( sqlException );
    }finally {
      con = null;
}//FIM unsetEntityContext
public void ejbPassivate(){
  condCNPJ = null;
// get primary key value when container activates EJB
public void ejbActivate(){
  condCNPJ = ( Integer ) entityCont.getPrimaryKey();
public void ejbRemove() throws RemoveException{}
}//Fecha o EJB

Answer 1

Hi,
Which server r u using? I think u have not included the server jar file in u r classpath. for weblogic server, the look up should be like this.
Properties p = new Properties();
p.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory");
p.put(Context.PROVIDER_URL,"t3://localhost:7001");
InitialContext ctx = new InitialContext(p);
Object obj = ctx.lookup("HelloBean");
regards
jogesh