Hi, I am using spring in my application and the pmf is a singleton, I
put it in the class just to make sure it is not a spring issue. I am
still getting the error but in my case nothing is persisted. I also
added the @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
line and no dice my SDK version is the newest 1.2.5. The following is
the spring code from which I am calling the saveUser method I had
posted before. Any help would be greatly appreciaed, thanks.
package subasta.web.users;
import org.springframework.beans.propertyeditors.StringTrimmerEditor;
import org.springframework.web.bind.ServletRequestDataBinder;
import org.springframework.web.servlet.mvc.SimpleFormController;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.view.RedirectView;
import org.springframework.beans.factory.annotation.Autowired;
import subasta.domain.users.User;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import java.util.logging.Logger;
import subasta.service.users.GuardaUsuario;
import subasta.repository.users.UserDAO;
public class RegisterController extends SimpleFormController {
/** Logger for this class and subclasses */
private static final Logger log = Logger.getLogger
(RegisterController.class
.getName());
private UserDAO userDao;
public void setUserDao(UserDAO userDao) {
this.userDao = userDao;
}
@Override
public ModelAndView onSubmit(Object command) throws ServletException
{
String nombre = ((GuardaUsuario) command).getNombre();
log.info("Guardando usuario " + nombre + ".");
User user = new User(nombre);
userDao.saveUser(user);
log.info("returning from RegisterController view to "
+ getSuccessView());
return new ModelAndView(new RedirectView(getSuccessView()));
}
/*
* This was added because after uploading to GAE I was getting an
exception, it is
* actually a pretty neat addition, taken from its javadoc:
* Property editor that trims Strings. Optionally allows transforming
an empty string into a null value. Needs to be explictly registered,
e.g. for command binding.
* @see
org.springframework.web.servlet.mvc.BaseCommandController#initBinder
(javax.servlet.http.HttpServletRequest,
org.springframework.web.bind.ServletRequestDataBinder)
*/
@Override
protected void initBinder(HttpServletRequest request,
ServletRequestDataBinder binder) throws Exception {
binder.registerCustomEditor(String.class,
new StringTrimmerEditor(false));
}
}
On Sep 11, 3:31 pm, Jeff <[email protected]> wrote:
> I've been seeing the same thing, and also only on the first access
> after application start. It happens consistently for me with my first
> call to either getObjectById makePersistent or makePersistentAll. In
> my attempts to search the web for info, I ran across a snippet of code
> that included the specified error message text. A comment in that
> source said something like "this is a harmless exception, we should
> figure out a way to suppress it." Yeah, I was annoyed at having spent
> a bunch of time thinking this was the source of an issue when it was
> only a red herring. Sorry I don't remember the url to that code
> snippet but searching for pieces of the error message from the
> beginning of your stack trace should eventually find it.
>
> I'm currently choosing to ignore the exception and everything appears
> to be working for me.
>
> On Sep 11, 12:01 pm, "Jason (Google)" <[email protected]> wrote:
>
>
>
> > You shouldn't need the @Persistent(valueStrategy =
> > IdGeneratorStrategy.IDENTITY) line since you're using a key name and not a
> > String-encoded ID.
>
> > The only thing that looks suspicious is your pmf object. The best practice
> > is to use a PersistenceManagerFactory singleton as documented
> > athttp://code.google.com/appengine/docs/java/datastore/usingjdo.html#Ge...,
> > but I would expect to see exceptions with subsequent calls to saveUser, not
> > the first call. All the same, I recommend you try this to see if it helps,
> > and please also let me know which version of the SDK you're using.
>
> > - Jason
>
> > On Thu, Sep 10, 2009 at 1:09 AM, bysse <[email protected]> wrote:
>
> > > As expected, this has nothing to do with wicket or sessions, just to
> > > be sure i've checked those. If fact, all entities get persisted as
> > > they should and the exception is caught somewhere in makePersistent.
> > > So as far as i know, no harm is done(?)
> > > So i think i'll just ignore this stacktrace and continue as usual.
>
> > > On Sep 10, 12:22 am, bysse <[email protected]> wrote:
> > > > I also get this exception, but only on the first call to
> > > > makePersistent.
>
> > > > First Call:
> > > > Exception
> > > > Store objects ?
> > > > Later Calls
> > > > Ok
> > > > Stores objects
>
> > > > Can't think of anything that causes this. I'm using Wicket, how about
> > > > you?
>
> > > > /Erik
>
> > > > On Sep 8, 7:48 pm, cancunmods <[email protected]> wrote:
>
> > > > > I am having trouble saving an object on google app engine. Here is my
> > > > > POJO class:
>
> > > > > package subasta.domain.users;
>
> > > > > import javax.jdo.annotations.IdentityType;
> > > > > import javax.jdo.annotations.PersistenceCapable;
> > > > > import javax.jdo.annotations.PrimaryKey;
> > > > > import javax.jdo.annotations.Persistent;
>
> > > > > @PersistenceCapable(identityType = IdentityType.APPLICATION)
> > > > > public class User {
> > > > > @PrimaryKey
> > > > > @Persistent
> > > > > private String nombre;
>
> > > > > public User(String nombre){
> > > > > this.nombre = nombre;
> > > > > }
>
> > > > > public String getNombre() {
> > > > > return nombre;
> > > > > }
>
> > > > > public void setNombre(String nombre) {
> > > > > this.nombre = nombre;
> > > > > }
>
> > > > > }
>
> > > > > Here is my JDO Code.:
>
> > > > > package subasta.repository.users;
>
> > > > > import java.util.Set;
> > > > > import java.util.logging.Logger;
>
> > > > > import javax.jdo.JDOHelper;
> > > > > import javax.jdo.PersistenceManagerFactory;
> > > > > import javax.jdo.PersistenceManager;
>
> > > > > import subasta.domain.users.User;
>
> > > > > public class JDOUserDAO implements UserDAO{
> > > > > /** Logger for this class and subclasses */
> > > > > private static final Logger log = Logger.getLogger(UserDAO.class
> > > > > .getName());
>
> > > > > private static final PersistenceManagerFactory pmf =
> > > > > JDOHelper.getPersistenceManagerFactory("transactions-
> > > > > optional");
>
> > > > > //PersistenceManagerFactory pmf;
>
> > > > > //public void setPmf(PersistenceManagerFactory pmf) {
> > > > > //this.pmf = pmf;
> > > > > //}
>
> > > > > public void saveUser(User user){
> > > > > PersistenceManager pm = pmf.getPersistenceManager();
> > > > > try{
> > > > > pm.makePersistent(user);
> > > > > }finally {
> > > > > pm.close();
> > > > > }
> > > > > }
>
> > > > > @SuppressWarnings("unchecked")
> > > > > public Set<User> getUsers(){
> > > > > PersistenceManager pm = pmf.getPersistenceManager();
> > > > > Set<User> users = (Set<User>)pm.getManagedObjects
> > > > > (User.class);
> > > > > pm.close();
> > > > > return users;
> > > > > }
>
> > > > > }
>
> > > > > Things go wrong when making the call tomakePersistent. The exception
> > > > > is:
>
> > > > > 08-sep-2009 16:51:35
>
> > > com.google.appengine.repackaged.com.google.common.base.FinalizableReference
> > > Queue
> > > > > <init>
> > > > > INFO: Failed to start reference finalizer thread. Reference cleanup
> > > > > will only occur when new references are created.
> > > > > java.lang.reflect.InvocationTargetException
> > > > > 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:597)
> > > > > at
>
> > > com.google.appengine.repackaged.com.google.common.base.FinalizableReference
> > > Queue.<init>
> > > > > (FinalizableReferenceQueue.java:124)
> > > > > at
>
> > > com.google.appengine.repackaged.com.google.common.labs.misc.InterningPools
> > > > > $WeakInterningPool.<clinit>(InterningPools.java:104)
> > > > > at
>
> > > com.google.appengine.repackaged.com.google.common.labs.misc.InterningPools.
> > > newWeakInterningPool
> > > > > (InterningPools.java:48)
> > > > > at
>
> > > com.google.appengine.repackaged.com.google.io.protocol.ProtocolSupport.<cli
> > > nit>
> > > > > (ProtocolSupport.java:55)
> > > > > at com.google.apphosting.api.DatastorePb$PutRequest.freeze
> > > > > (DatastorePb.java:8452)
> > > > > at com.google.apphosting.api.DatastorePb$PutRequest$1.<init>
> > > > > (DatastorePb.java:8367)
> > > > > at com.google.apphosting.api.DatastorePb$PutRequest.<clinit>
> > > > > (DatastorePb.java:8364)
> > > > > at com.google.appengine.api.datastore.DatastoreServiceImpl.put
> > > > > (DatastoreServiceImpl.java:152)
> > > > > at com.google.appengine.api.datastore.DatastoreServiceImpl.put
> > > > > (DatastoreServiceImpl.java:138)
> > > > > at com.google.appengine.api.datastore.DatastoreServiceImpl.put
> > > > > (DatastoreServiceImpl.java:130)
> > > > > at
>
> > > org.datanucleus.store.appengine.RuntimeExceptionWrappingDatastoreService.pu
> > > t
> > > > > (RuntimeExceptionWrappingDatastoreService.java:93)
> > > > > at org.datanucleus.store.appengine.DatastorePersistenceHandler.put
> > > > > (DatastorePersistenceHandler.java:165)
> > > > > at org.datanucleus.store.appengine.DatastorePersistenceHandler.put
> > > > > (DatastorePersistenceHandler.java:112)
> > > > > at
>
> > > org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObjects
> > > > > (DatastorePersistenceHandler.java:239)
> > > > > at
>
> > > org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObject
> > > > > (DatastorePersistenceHandler.java:225)
> > > > > 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 subasta.repository.users.JDOUserDAO.saveUser(JDOUserDAO.java:
> > > > > 29)
> > > > > at subasta.web.users.RegisterController.onSubmit
> > > > > (RegisterController.java:38)
> > > > > at
> > > > > org.springframework.web.servlet.mvc.SimpleFormController.onSubmit
> > > > > (SimpleFormController.java:409)
> > > > > at
> > > > > org.springframework.web.servlet.mvc.SimpleFormController.onSubmit
> > > > > (SimpleFormController.java:381)
> > > > > at
>
> > > org.springframework.web.servlet.mvc.SimpleFormController.processFormSubmiss
> > > ion
> > > > > (SimpleFormController.java:267)
> > > > > at
>
> > > org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInt
> > > ernal
> > > > > (AbstractFormController.java:265)
> > > > > at
> > > > > org.springframework.web.servlet.mvc.AbstractController.handleRequest
> > > > > (AbstractController.java:153)
> > > > > at
>
> > > org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle
> > > > > (SimpleControllerHandlerAdapter.java:48)
> > > > > at org.springframework.web.servlet.DispatcherServlet.doDispatch
> > > > > (DispatcherServlet.java:875)
> > > > > at org.springframework.web.servlet.DispatcherServlet.doService
> > > > > (DispatcherServlet.java:807)
> > > > > at org.springframework.web.servlet.FrameworkServlet.processRequest
> > > > > (FrameworkServlet.java:571)
> > > > > at org.springframework.web.servlet.FrameworkServlet.doPost
> > > > > (FrameworkServlet.java:511)
> > > > > at
>
> ...
>
> read more »
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