How to execute our own Insert Query using EJB3.0 and Toplink

Question

Hi,
This is my scenario. I want to insert master record and then detail record.
Initially i followed this way
UnitOfWork uow = getSessionFactory().acquireUnitOfWork();
final EgovAgencyDetails egovAgency =
(EgovAgencyDetails)uow.executeQuery("findAgencyRegistrationNo",
EgovAgencyDetails.class, eGovPOMasterBean.getAgencyRegistrationNo());
EgvoPaymentorderMaster po = (EgvoPaymentorderMaster)uow.newInstance
(EgvoPaymentorderMaster.class);
po.setSupplierName(-----);
uow.commit();
Then i inserted detail record. the same find the master record and then inserted detail record in the table.
But if detail record fails means i want to rollback the master record.
For that i followed below steps in my custom method in session facade,
SQLCall sqlCall = new SQLCall("INSERT INTO EMPLOYEE (L_NAME) VALUES (#last_name)");
UpdateObjectQuery query = new UpdateObjectQuery(myEmployee);
query.setCall(sqlCall);
query.addArgument("last_name"); // input
query.bindAllParameters();
Vector arguments = new Vector();
arguments.add("MacDonald");
uow.executeQuery(query, arguments);
final EgvoPaymentorderMaster poMaster =
(EgvoPaymentorderMaster)uow.executeQuery("findEgovPOID", EgvoPaymentorderMaster.class, eGovPOMasterBean.getPoNumber());
EgovPaymentorderDetail poDetailInstance = (EgovPaymentorderDetail)uow.newInstance
(EgovPaymentorderDetail.class);
poMaster .addEgovPaymentorderDetail(poDetailInstance);
Since if detail record failed means i want to rollback.
I am getting this exception. Pleas kindly provide what changes i need to do.
[TopLink Warning]: 2008.03.15 01:05:48.931--UnitOfWork(12731542)--Exception [TOPLINK-6014] (Oracle TopLink - 10g Release 3 (10.1.3.3.0) (Build 070608)): oracle.toplink.exceptions.QueryException
Exception Description: Objects cannot be written during a UnitOfWork, they must be registered.
Query: WriteObjectQuery(mof.egov.model.EgvoPaymentorderMaster@126df42)
08/03/15 13:05:48 --- Inside Catch Method --- :
Exception Description: Objects cannot be written during a UnitOfWork, they must be registered.
Query: WriteObjectQuery(mof.egov.model.EgvoPaymentorderMaster@126df42)
Local Exception Stack:
Exception [TOPLINK-6014] (Oracle TopLink - 10g Release 3 (10.1.3.3.0) (Build 070608)): oracle.toplink.exceptions.QueryException
Exception Description: Objects cannot be written during a UnitOfWork, they must be registered.
Query: WriteObjectQuery(mof.egov.model.EgvoPaymentorderMaster@126df42)
     at oracle.toplink.exceptions.QueryException.invalidQuery(QueryException.java:536)
     at oracle.toplink.queryframework.ObjectLevelModifyQuery.executeInUnitOfWorkObjectLevelModifyQuery(ObjectLevelModifyQuery.java:86)
     at oracle.toplink.queryframework.ObjectLevelModifyQuery.executeInUnitOfWork(ObjectLevelModifyQuery.java:72)
     at oracle.toplink.publicinterface.UnitOfWork.internalExecuteQuery(UnitOfWork.java:2604)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:993)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:965)
     at mof.egov.model.MasterDetailSessionEJBBean.insertPaymentOrder(MasterDetailSessionEJBBean.java:391)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
Thanks & Regards
Vimalan Balan

Answer 1

C,
I don't use TopLink, but I suggest you set the "processEscapes" [Oracle database connection] property to "true", as described in the JDBC User's Guide and Reference.
Oracle documentation can be accessed from here:
http://www.oracle.com/technology/documentation/index.html
Good Luck,
Avi.