The SFSB is a session scope component and the SLSB is page scope / conversation scope object.

The session scope bean reads out the data from the DB and displays it on screen. The page that i am referring to contains only this SFSB. I am referring to this code as this is the simplest code which uses Extended PErsistence Context.

@Stateful
@Scope(SESSION)
@Name("purchaseOrderQueries")
public class PurchaseOrderQueriesImpl extends SpectrumUIBaseAction implements
                PurchaseOrderQueries {

        @PersistenceContext(type = PersistenceContextType.EXTENDED)
        private EntityManager em;

        private String sortField = "getId.getDocumentNumber";
        private boolean sortAscending = true;

        @In(value = "currentUser", required = true)
        private AuthUsers currentUser;

        @In(required = false)
        @Out(required = false)
        List<MstCurrency> mstCurrencylist;

        @In(required = false)
        // @Out(required = false).. should not use..
        private OrderHdr orderHdrEntity;

        List<OrderHdr> orderHdrList;

        List<OrderHdr> orderHdrListForClose;

        List<OrderHdr> orderHdrListForEdit;

        List<OrderHdr> orderHdrListForApproval;

        List<MstDocumentTypes> mstDocumentTypeslist;

        int pageIndex = 1;

        @RequestParameter
        String docNo;

        @RequestParameter
        String siteCode;

        @RequestParameter
        String finYr;

        @In(required = false)
        @Out(required = false)
        List<OrderHdr> orderHdrInboxList;

        @In(required = false, create = true)
        private CommonQueriesMasterForAuthorization commonQueriesMasterForAuthorization;

        public List<OrderHdr> getOrderHdrList() {
                messageLogger.info("MasterAction: getOrderHdrList()");
                messageLogger.info("MasterAction: getOrderHdrList():orderHdrEntity--> "
                                + orderHdrEntity);

                // This is just for Purchase ORder hence document types has to be
                // Purcahse order only

                String docNo = "";
                String documentTypes = getProperty("DocumentType.PO");
                StringBuffer siteCodeString = getSiteListForTransaction("task.PO.create");

                if (orderHdrEntity != null && orderHdrEntity.getId() != null
                                && orderHdrEntity.getId().getDocumentNumber() != null
                                && !orderHdrEntity.getId().getDocumentNumber().equals("")) {

                        messageLogger.info("getOrderHdrList():DocumentNumber--> "
                                        + orderHdrEntity.getId().getDocumentNumber());

                        if (orderHdrEntity.getId().getDocumentNumber() != null
                                        && orderHdrEntity.getId().getDocumentNumber()
                                                        .equalsIgnoreCase("")) {
                                docNo = orderHdrEntity.getId().getDocumentNumber() + "%";
                        }

                        orderHdrList = em
                                        .createQuery(
                                                        "from OrderHdr o where "
                                                                        + "o.mstDocumentTypes.documentType= :documentType "
                                                                        + " and o.id.documentNumber like :documentNumber and o.status= :status and o.mstSite.siteCode in "
                                                                        + siteCodeString.toString()).setParameter(
                                                        "documentType", documentTypes).setParameter(
                                                        "documentNumber",
                                                        orderHdrEntity.getId().getDocumentNumber() + "%")
                                        .setParameter("status", true).getResultList();
                        messageLogger.info("MasterAction: getOrderHdrList().size-->"
                                        + orderHdrList.size());
                        return orderHdrList;
                } else if (orderHdrList == null) {

                        orderHdrList = em
                                        .createQuery(
                                                        "from OrderHdr o where "
                                                                        + "o.mstDocumentTypes.documentType= :documentType and o.status= :status and o.mstSite.siteCode in "
                                                                        + siteCodeString.toString()).setParameter(
                                                        "documentType", documentTypes).setParameter(
                                                        "status", true).getResultList();
                        messageLogger.info("MasterAction: getOrderHdrList().size-->"
                                        + orderHdrList.size());
                        return orderHdrList;

                } else {
                        return orderHdrList;
                }

        }

}

OK.... Now i know the problem....

My SFSB is expecting SEAM to inject another SLSB (Seam injects it correctly) and both of these components have their own PersistenceContext objects. I am executing a function on SLSB from the SFSB and i think this is where the error is occurring...

I tried moving the code of the injected component in to the SFSB and it started working fine. Does this mean that i cannot use any component (SEAM) with its own PersistenceContext in another SEAM component without having this issue or is this only occurring because of a SLSB and SFSB being used together.

I feel if this is the case then the only workaround i can think of is by passing the Entity Manager from the Main SLSB in to the injected component to ensure that the context does not change. Is this a fair understanding ?

Thanks

Raminder

Hi Leo,

hmm you have a valid point. The reason may be we were using extended persistence is because we were using Session scope objects... So we believed that the PersistenceContext needs to automatically be upgraded to Extended... I understand from your comment that this may not be a requirement at all since we are just querying the db and not saving the data back after a long conversation..... I will try that and check if it works fine.

But wouldnt the problem still exist as we are having 2 different entitymanager components being used in different beans?

Thanks

Raminder