1 Reply Latest reply on Sep 23, 2009 10:53 AM by Guzman Llambi­as

    Convert transactional EJB to Web Service

    Guzman Llambi­as Novice

      Hi, I'm doing some tests with JBossTS, WS-AT and interoperability with .NET.

      This is the first phase towards this tests and I got the following problem. I want to expose a transactional ejb (no WS-AT transactions, simple JTA) as a Web Service. EJB alone works well, unfortunatelly, when I expose it as a Web Service an error occurs with the creation of the transactional session. Is it possible to expose a transactional ejb to a WebService?

      Here is the ejb code:

      @Stateless
      @LocalBinding (jndiBinding="PepeBankServices/PepeBankLocal")
      @WebService
      public class PepeBankService implements IPepeBankServiceLocal {
      
       @PersistenceContext(unitName="PepeBankPersistence")
       protected EntityManager em;
      
       public PepeBankService() { }
      
       @WebMethod
       public Cuenta consultar(@WebParam(name="idCuenta") long idCuenta) throws BankException
       { Cuenta cuenta = (Cuenta)em.createQuery("select c from Cuenta c where c.id_cuenta = ?1").
       setParameter(1, idCuenta).getResultList().get(0);
       return cuenta;
      
       }
      }
      


      and here is the error stack trace:

      2009-09-22 17:47:08,328 INFO [STDOUT] (http-127.0.0.1-8080-3) Create Web Service...<br>
      2009-09-22 17:47:08,812 INFO [STDOUT] (http-127.0.0.1-8080-3) Call Web Service Operation...<br>
      2009-09-22 17:47:08,999 WARN [org.jboss.ejb3.stateless.StatelessBeanContext] (http-127.0.0.1-8080-1) EJBTHREE-1337: do not get WebServiceContext property from stateless bean context, it should already have been injected
      2009-09-22 17:47:09,015 WARN [org.jboss.ejb3.stateless.StatelessBeanContext] (http-127.0.0.1-8080-1) EJBTHREE-1337: do not get WebServiceContext property from stateless bean context, it should already have been injected
      2009-09-22 17:47:09,031 ERROR [org.hibernate.LazyInitializationException] (http-127.0.0.1-8080-1) failed to lazily initialize a collection of role: uy.edu.fing.lins.persistence.Cliente.cuentas, no session or session was closed
      org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: uy.edu.fing.lins.persistence.Cliente.cuentas, no session or session was closed
       at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:380)
       at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:372)
       at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:365)
       at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:108)
       at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:186)
       at com.sun.xml.bind.v2.runtime.reflect.Lister$CollectionLister.iterator(Lister.java:278)
       at com.sun.xml.bind.v2.runtime.reflect.Lister$CollectionLister.iterator(Lister.java:265)
       at com.sun.xml.bind.v2.runtime.property.ArrayElementProperty.serializeListBody(ArrayElementProperty.java:129)
       at com.sun.xml.bind.v2.runtime.property.ArrayERProperty.serializeBody(ArrayERProperty.java:152)
       at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:322)
       at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:681)
       at com.sun.xml.bind.v2.runtime.property.SingleElementNodeProperty.serializeBody(SingleElementNodeProperty.java:150)
       at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:322)
       at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:681)
       at com.sun.xml.bind.v2.runtime.property.SingleElementNodeProperty.serializeBody(SingleElementNodeProperty.java:150)
       at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:322)
       at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:681)
       at com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl$1.serializeBody(ElementBeanInfoImpl.java:151)
       at com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl$1.serializeBody(ElementBeanInfoImpl.java:185)
       at com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl.serializeBody(ElementBeanInfoImpl.java:305)
       at com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl.serializeRoot(ElementBeanInfoImpl.java:312)
       at com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl.serializeRoot(ElementBeanInfoImpl.java:71)
       at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsRoot(XMLSerializer.java:490)
      
      


      Thank you very much!
      Guzmán