Ah! web app.
I don't think you get any injections in a web app, you need to have an
EJB in an EJB module and then look it up (JNDI) from the web app.
Is there a section called "Persistence in the Web Tier" or something
like that??
Do look in the log files, I think Glassfish would at least complain
about having @Stateless classes in a deployed war.
You can also try to create an .ear project instead of a .war one.
-- Michael
On 22 Oct, 2009, at 10:36 PM, Roan Brasil Monteiro wrote:
>
> it's a web application I am trying to write, I created a bean and
> deploy and this didn't work yet.
>
>
> 2009/10/22 Michael Bar-Sinai <mich.barsinai_at_gmail.com>
> Yes, the idea is to create an EJB - as Marina said, you need a JEE
> class to get injections.
> So that's the whole process here: create the interface and the bean,
> deploy, call the bean.
> Please note that if you're just learning JPA and try to implement it
> in a desktop application, this is not the way at all.... you are
> writing a server-side program, right?
>
> --Michael
>
> On 22 Oct, 2009, at 10:27 PM, Roan Brasil Monteiro wrote:
>
>> One Question:
>>
>> Should I create a interface
>>
>> @Local
>> DaoResourceProviderLocal {
>> public BaseDAO getBaseDAO();
>> }
>>
>> @Stateless
>> public class DaoResourceProvider implements DaoResourceProviderLocal{
>>
>> @PersisteceUnit(unitName="citespacePU")
>> EntityManagerFactory emf;
>>
>> ...
>> public BaseDAO getBaseDao() {
>> BaseDAO retVal = new BaseDAO();
>> retVal.setEmf( emf );
>> return retVal;
>> }
>>
>> }
>>
>>
>> 2009/10/22 Michael Bar-Sinai <mich.barsinai_at_gmail.com>
>> You can get the injected object using an EJB, and then manually
>> inject them to the DAO:
>> (This is from the top of my head, no JEE env here):
>>
>> @Local
>> public class DaoResourceProvider implements
>> DaoResourceProviderLocal {
>>
>> @PersisteceUnit(unitName="citespacePU")
>> EntityManagerFactory emf;
>>
>> ...
>> public BaseDAO getBaseDao() {
>> BaseDAO retVal = new BaseDAO();
>> retVal.setEmf( emf );
>> return retVal;
>> }
>>
>> ...
>>
>>
>> --Michael
>>
>>
>>
>> On 22 Oct, 2009, at 10:07 PM, Roan Brasil Monteiro wrote:
>>
>>> Chapter 24?
>>>
>>> 2009/10/22 Roan Brasil Monteiro <roanbrasil_at_gmail.com>
>>> Just a part. I have a JEE aplication and I would like to split the
>>> persistence part from my JPA class. Do you have some idea? I will
>>> take a look on the documentation.
>>>
>>>
>>> 2009/10/22 Marina Vatkina <Marina.Vatkina_at_sun.com>
>>> It depends on what you are trying to achieve in which type of an
>>> application. Did you look at the JPA cjapter in Java EE 5 Tutorial?
>>>
>>> Roan Brasil Monteiro wrote:
>>> How should I resolve it? How should be my class? I am learning and
>>> I am trying to put the persistence part in DAO class.
>>>
>>> 2009/10/22 Marina Vatkina <Marina.Vatkina_at_sun.com <mailto:Marina.Vatkina_at_sun.com
>>> >>
>>>
>>>
>>> You can't inject anything in a class that is neither a Main
>>> class,
>>> nor a JavaEE component.
>>>
>>> -marina
>>>
>>>
>>> Roan Brasil Monteiro wrote:
>>>
>>> I have a class BaseDAO as bellow and I am getting
>>> NullPointerException on EntityManager em =
>>> emf.createEntityManager(); line from BaseDAO class, Can
>>> someone
>>> help me how to fix it?
>>>
>>> public class BaseDAO<T> {
>>>
>>> @PersistenceUnit(unitName = "citespacePU")
>>> EntityManagerFactory emf;
>>> public List<T> ListCountry(){
>>> EntityManager em = emf.createEntityManager();
>>> try{
>>> Query q = em.createQuery("Select c from Country
>>> c ");
>>> List<Country> c =
>>> q.getResultList(); return (List<T>) c;
>>> }finally{
>>> if (em != null && em.isOpen()) {
>>> em.close();
>>> }
>>> } }
>>>
>>>
>>> }
>>>
>>> I have my Jersey resource class:
>>>
>>> @Path("/user/")
>>> public class UserResource {
>>> @GET
>>> @Produces("text/plain")
>>> public String registerUser(){
>>> BaseDAO<Country> countryDAO = new
>>> BaseDAO<Country>();
>>> List<Country> c = countryDAO.ListCountry();
>>> String y = "";
>>> for(Country x: c){
>>> y = y + ":" +x.getName();
>>> } return
>>> "[Country List]:"+y;
>>>
>>> }
>>>
>>> -- Atenciosamente,
>>>
>>> Roan Brasil Monteiro
>>> http://roanbrasil.wordpress.com/
>>>
>>>
>>>
>>>
>>>
>>> --
>>> Atenciosamente,
>>>
>>> Roan Brasil Monteiro
>>> http://roanbrasil.wordpress.com/
>>>
>>>
>>>
>>>
>>> --
>>> Atenciosamente,
>>>
>>> Roan Brasil Monteiro
>>> http://roanbrasil.wordpress.com/
>>>
>>>
>>>
>>> --
>>> Atenciosamente,
>>>
>>> Roan Brasil Monteiro
>>> http://roanbrasil.wordpress.com/
>>
>>
>>
>>
>> --
>> Atenciosamente,
>>
>> Roan Brasil Monteiro
>> http://roanbrasil.wordpress.com/
>
>
>
>
> --
> Atenciosamente,
>
> Roan Brasil Monteiro
> http://roanbrasil.wordpress.com/