"Transaction begin not detected" when trying to persist object in Web Service method

[pierounix]

Hello,

I have developed a small application for hotel reservations. The method for booking is exported as a webservice but when i try to invoke it i get the following:

Exception in thread "main" javax.xml.ws.soap.SOAPFaultException: java.lang.IllegalStateException: Transaction begin not detected, try installing transaction:ejb-transaction in components.xml

          at com.sun.xml.internal.ws.fault.SOAP11Fault.getProtocolException(Unknown Source)

          at com.sun.xml.internal.ws.fault.SOAPFaultBuilder.createException(Unknown Source)

          at com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(Unknown Source)

          at com.sun.xml.internal.ws.client.sei.SyncMethodHandler.invoke(Unknown Source)

          at com.sun.xml.internal.ws.client.sei.SEIStub.invoke(Unknown Source)

          at $Proxy30.bookRoom(Unknown Source)

...

This is my WebService class:

-------------------------------------------------------------------------------------------------------------------

@Stateless

@Name("roomServiceRemote")

@WebService(name="RoomWS")

public class RoomServiceRemoteImpl implements RoomServiceRemote {

          @In

          private EntityManager entityManager;

...

@WebMethod

          public Long bookRoom(Booking booking) {

                         entityManager.persist(booking);

...

-----------------------------------------------------------------------------------------------------------------------

I tried to put <transaction:ejb-transaction> in my components.xml but nothing changed.

I appreciate any help

[pierounix]

I'm able  to retrieve object using Web Services, but when a transaction is needed it throws the above exception. The documentation doesn't show examples of how to persist, update or remove object with a Web Service call. Is it possible with Seam? What's the recommended structure for this?