NetBeans Create new Record to Database, How to retrieve it?

Question

Hi
I am new to java and using NetBeans and JBoss to develop a new web application now.
I created a new "ComModule" record to "ComModule" table in database inside my servlet while clicking Add button on my web page.
The codes are:
ComModuleFacadeRemote comModuleFacadeRemote = this.lookupComModuleFacade();
ComModule cm = new ComModule();
cm.setSerialNumber(serialNo);
cm.setMacAddress(MACAddress);
comModuleFacadeRemote.create(cm);
As in ComModule class, I have set the ComModule ID as sequence and primary key. So this code will add a new reocord by increasing the sequence key automatically.
What i need to do now is to retrieve the new added record in "ComModule" table and pass it as an Object for other uses.
e.g. I can do like this:
ComModule cmObj = comModuleFacadeRemote.getComModuleByID(id);
BUT the problem now is I don't know the ID of the new added record. How can I retrieve it?
In ComModuleFacade(), the common method are CREATE, DESTROY, EDIT, FIND, FINDALL. Is there a method that I can directly retrieve a new inserted record??
Thanks a lot for any of your help...
Edited by: OhLei on Mar 19, 2008 12:24 AM

Answer 1

Hi,
  public Long create(name,surname) throws
            SomeException{
        Person person=null;
            try{
                person=new Person(name,surname);
                em.persist(object);
            }catch (Exception ex){
                 throw new EJBException("create: " + ex.getMessage());
        return person.getId();  //here it will return your id
    }Person is an entity class with fields id, name, surname.
Good Luck.