[jboss-user] [EJB3] - Cant inject Bean class into Restfull WebService (JAX-RS)

[ha so]

ha so [https://community.jboss.org/people/haso] created the discussion

"Cant inject Bean class into Restfull WebService (JAX-RS)"

To view the discussion, visit: https://community.jboss.org/message/821240#821240

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I'm trying to save data acquired by Rest web service to database using hibernate/persistence.
In one of my web modules i implemented that service. Database ejb connector is placed in EJB module. They are parts of EAR application.
Every time when i call pb.addDevice() im getting  java.lang.NullPointerException when puting proper url with params in browser(worked till i wanted to save it to Database). Can't find what is wrong with it. I'm using jboss 6.1.0 Final.

PS. when i changed from 

    @EJB
    PersistenceBean pb; 
to

    PersistenceBean pb = new PersistenceBean();

i got null pointer on  EntityManager em = emf.createEntityManager(); 

code:


    @Stateless
    @Path("/RestService")
    public class RestPush  {

    @EJB
    PersistenceBean pb; 

        @GET
          @Path("/RegisterDevice")
        public void registerDevice(
            @QueryParam("deviceId") String deviceId){

            Device d = new Device(true);
            d.setId = deviceId;
            pb.addDevice(d);
        }
    }


and EJB class:

    @Stateless(mappedName = "PersistenceBean")
    public class PersistenceBean {
    @PersistenceUnit(unitName = "PersistentUnitName")
    EntityManagerFactory emf;

    private void persist(Object o, EntityManager entityManager) {
        try {
            entityManager.persist(o);
        } catch (Exception e) {
            logger.severe("Error writing to DB: " + e);
            logger.severe("" + e.fillInStackTrace());
        }
    }
      public void addDevice(Device d) {
        try {
            EntityManager em = emf.createEntityManager(); 
        if (persist(device, em)) {
                logger.info("Device with id : " + device.getId()
                        + " has been added ");
    } else {
                logger.info("Failed to add device with id: " + device.getId());
    } catch (Exception e) {
            logger.severe("PersistenceBean: Could not save device.");
            e.printStackTrace();
    }

    }
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