@EJB and @PersistenceContext not working in JBOSS.5.1.0.GA?

[reena_jacob]

I am implementing a Rest Webservice Using RESTEasy and JPA for persistance and deploying in JBOSS.5.1.0.GA. JPA is working fine when we are getting EMF and EM programatically

emf = Persistence.createEntityManagerFactory(Constants.GTL_ORACLE_PERSISTENCE_UNIT); 
em =   emf.createEntityManager();  

But when I tried to inject EntityManager using @PersistenceContext . I am getting null value.

Now we tried it using @Stateless EJB but  that too failed in our service class.

Our Service class is as follows:-

public class ProductResourceService implements ProductResource { 
 private boolean oneTime = false; @EJB(mappedName = "MyService")
 private PersistanceService persistanceService;  
 @Override public String saveProduct(@PathParam("id") String id){ 
 System.out.println("requset got id[" + id + "]");    
 Product product = new Product();
 product.setName(id);
 product.setDescription("testing Persistance"); 
String status = "Failed";
try { System.out.println("persistanceService " + persistanceService);
 persistanceService.saveObject(product);  
status = "Success"; } 
catch (Exception e) {
 System.out.println("Error" + e); 
} return status; 
} 


 PersistanceService.java 
  -------------------------------------------
 @Local(PersistanceServiceLocal.class)
 @Stateless(mappedName = "MyService")
 public class PersistanceService implements PersistanceServiceLocal { 
 private EntityManager em;  @PersistenceContext public void setEm(EntityManager em) {
 this.em = em; 
}   
public void saveObject(Object obj) {  
try { 
em.getTransaction().begin(); em.persist(obj);
 em.getTransaction().commit();
 }
 finally { 
em.close();
 } 
 }  
public Object getSingleResultSet(String namedQuery) { 
Query query = null; 
try { query = em.createNamedQuery(namedQuery); } 
finally { 
em.close(); 
} 
if (query == null) {
 return null; 
} 
return query.getSingleResult();
  } 

I have persistence.xml configured in this way.  

<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence  http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
  <persistence-unit  name="productDetails" transaction-type="JTA" > 
<provider>org.hibernate.ejb.HibernatePersistence</provider>
 <jta-data-source>java:/OracleDS</jta-data-source> 
 <class>com.gtl.cdi.rest.model.Product</class> 
<properties>
 <property name="hibernate.dialect" value="org.hibernate.dialect.OracleDialect" />
 <property name="hibernate.hbm2ddl.auto" value="create-drop" /> 
 </properties>   
</persistence-unit> 

Can anyone please tell me where I went wrong.I have been spending several days trying to resolve it....Is it that @PersistenceContext is not supported by JBOSS 5.1.0GA???

Any help will be greatly appreciated.

[prasobh.kollattu]

It seems like you are accessing  @PersistanceContext in REST Service class.PersistanceContext can be injected either in Servlet ,EJB or CDI Managed classes.Basically Container managed classes can have PersistanceContext be injected.