Hi there,
I'm new to EJB3 and not sure if the behavior is correct or not.
I have a stateless session bean that searches for an Entity bean and returns
the found object to the client:
FIRST SESSION BEAN
|
| public DestructionBin findDestructionBin(long id) {
| return manager.find(DestructionBin.class, id);
| }
|
The client is a struts application. The returned entity is assigned to an
ActionForm and is then changed on a webpage. Once the form is submitted I get
this modified entity and call an update method on another stateless session
bean.
STRUTS ACTION PROCESSING...
|
| public ActionForward saveData(ActionMapping mapping, ActionForm form,
| HttpServletRequest request, HttpServletResponse
response) {
| EditBinForm formObj = (EditBinForm) form;
|
| try {
| ManageDestructionBin mngBins = (ManageDestructionBin)
GeneralWebUtil.getJNDIObject(ManageDestructionBinBean.JNDILocal,
ManageDestructionBin.class);
|
| if (formObj.getId() > 0)
| mngBins.updateDestructionBin(formObj.getBin(), formObj
| .getWarehouse());
| ...
|
| SECOND SESSION BEAN
|
| public boolean updateDestructionBin(DestructionBin bin, long warehouse)
| throws WarehouseException {
| try {
| Warehouse wh = mngWarehouse.findWarehouse(warehouse);
| bin.setWarehouse(wh);
| manager.merge(bin);
| } catch (Exception e) {
| throw new WarehouseException(e.getMessage());
| }
|
| return true;
| }
|
However, when the merge is called.. this is the stacktrace I get from EJB
server:
| 09:43:51,941 WARN [JDBCExceptionReporter] SQL Error: 0, SQLState: null
| 09:43:51,941 ERROR [JDBCExceptionReporter] Batch entry 0 update
TBL_DESTRUCTION_BIN set LASTUPDATE_=2007-05-16 09:43:51.809000 +1000,
STATUS_=NULL, CLIENTREF_=VIC71234560, ACCESSCOUNT_=0, CREATEDBY_=NULL,
BARCODE_=NULL, CREATEDATE_=NULL, LASTACCESSED_=NULL, PRINTED_=0, TYPE_=ST,
SIZE_=1L, WAREHOUSE_=2, DEPARTMENT_=NULL, BUSINESSDAY_=0, COLLECTIONDATE_=NULL,
DELIVERYDATE_=NULL, ROTATIONSCHEDULE_=NULL where ID_=4 was aborted. Call
getNextException to see the cause.
| 09:43:51,942 WARN [JDBCExceptionReporter] SQL Error: 0, SQLState: 23502
| 09:43:51,942 ERROR [JDBCExceptionReporter] ERROR: null value in column
"status_" violates not-null constraint
| 09:43:51,942 ERROR [AbstractFlushingEventListener] Could not synchronize
database state with session
| org.hibernate.exception.ConstraintViolationException: Could not execute
JDBC batch update
|
Could anyone please tell me if this is the correct behavior? It's quite
annoying to find the object again and just change the updated fields.. and I
also don't think this is the solution for it ehehehehe
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