Hi,
could please somebody tell me, what I'm doing wrong here?
Here is one child datastructure I want to persist:
@PersistenceCapable
public class OfferDetails {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key mId;
@Persistent
private String mOfferDescription;
@Persistent
private Offer mOffer;
public OfferDetails ()
{
}
public OfferDetails (String offerDesc)
{
this ();
mOfferDescription = offerDesc;
}
}
And here is the parent
@PersistenceCapable(identityType = IdentityType.APPLICATION,
detachable="true")
public class Offer {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key mId;
@Persistent(mappedBy="mOffer")
private OfferDetails mOfferDetails;
public Offer( OfferDetails offerDetails)
{
this();
mOfferDetails = offerDetails;
}
}
Here is the presistance routine:
public class OfferDataAccess {
private static final long serialVersionUID = -7037344095742126014L;
private PersistenceManager pm;
public OfferDataAccess ()
{
pm = PMF.get().getPersistenceManager();
}
public void persistOffer (Offer offer)
{
pm.currentTransaction().begin();
try {
pm.makePersistent(offer);
pm.currentTransaction().commit();
} finally {
if (pm.currentTransaction().isActive())
pm.currentTransaction().rollback();
pm.close();
}
}
And here is the call of the persistance routine:
class CreateOfferActionCommand
{
public void execute() {
mOfferDB = new OfferDataAccess ();
mOffer = new Offer (mOfferDetails);
mOfferDB.persistOffer (mOffer);
}
}
Now if I run this code, I get following errormessage:
java.lang.IllegalStateException: Primary key for object of type
OfferDetails is null.
at
org.datanucleus.store.appengine.EntityUtils.getPkAsKey(EntityUtils.java:
152)
at
org.datanucleus.store.appengine.DatastoreFieldManager.getKeyForObject(DatastoreFieldManager.java:
625)
at
org.datanucleus.store.appengine.DatastoreFieldManager.getParentKeyFromParentField(DatastoreFieldManager.java:
634)
at
org.datanucleus.store.appengine.DatastoreFieldManager.establishEntityGroup(DatastoreFieldManager.java:
591)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertPreProcess(DatastorePersistenceHandler.java:
338)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObjects(DatastorePersistenceHandler.java:
246)
at
org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObject(DatastorePersistenceHandler.java:
235)
at
org.datanucleus.state.JDOStateManagerImpl.internalMakePersistent(JDOStateManagerImpl.java:
3185)
at
org.datanucleus.state.JDOStateManagerImpl.makePersistent(JDOStateManagerImpl.java:
3161)
at
org.datanucleus.ObjectManagerImpl.persistObjectInternal(ObjectManagerImpl.java:
1298)
at
org.datanucleus.ObjectManagerImpl.persistObject(ObjectManagerImpl.java:
1175)
at
org.datanucleus.jdo.JDOPersistenceManager.jdoMakePersistent(JDOPersistenceManager.java:
669)
at
org.datanucleus.jdo.JDOPersistenceManager.makePersistent(JDOPersistenceManager.java:
694)
at
com.sparradar.server.datamodel.offer.OfferDataAccess.persistOffer(OfferDataAccess.java:
29)
at
com.sparradar.server.action.actioncommands.CreateOfferActionCommand.execute(CreateOfferActionCommand.java:
60)
at
info.rk.vaadinapp.manager.urldispatching.URLActionDispatcher.handleURI(URLActionDispatcher.java:
90)
at com.vaadin.ui.Window.handleURI(Window.java:358)
at
com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleURI(AbstractCommunicationManager.java:
1830)
at
com.vaadin.terminal.gwt.server.CommunicationManager.handleURI(CommunicationManager.java:
311)
at
com.vaadin.terminal.gwt.server.AbstractApplicationServlet.handleURI(AbstractApplicationServlet.java:
912)
at
com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:
471)
at
com.vaadin.terminal.gwt.server.GAEApplicationServlet.service(GAEApplicationServlet.java:
231)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
487)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1093)
at
com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:
51)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1084)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:
43)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1084)
at
com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:
121)
at org.mortbay.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1084)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
360)
at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:
216)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:
181)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:
712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
405)
at
com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:
70)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
139)
at com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:352)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
506)
at org.mortbay.jetty.HttpConnection
$RequestHandler.headerComplete(HttpConnection.java:830)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
396)
at org.mortbay.thread.BoundedThreadPool
$PoolThread.run(BoundedThreadPool.java:442)
Could you please tell me, what I'm doing wrong here?
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