The same code in a request works fine btw.
On Sep 11, 3:54 pm, Erem <ehb...@gmail.com> wrote:
> Hi Jason,
>
> Thanks for the response. I'm seeing it in the development environment.
> I can't even get ahold of a stack trace in production because the
> logged events I try to throw just aren't reaching the Logs manager. I
> do know that it's not working, however, because the object doesn't get
> inserted in the following code.
>
> Here's some sample code to show what's happening, and a stack trace of
> the error it throws
>
> public class SessionListener implements HttpSessionListener {
> private static final Logger log = Logger
> .getLogger("DataNucleus.JDO");
> @Override
> public void sessionCreated(HttpSessionEvent ev) {
> System.out.println("Session starting");
> ev.getSession().setMaxInactiveInterval(2);
> }
>
> @Override
> public void sessionDestroyed(HttpSessionEvent ev) {
> try {
> System.out.println("Session ending");
> PersistenceManager pm =
> PMF.get().getPersistenceManager();
> System.out.println(pm);
> PersistMe me = new PersistMe();
> me.setName("Erem");
> pm.makePersistent(me);
> pm.close();
> System.out.println("Session ended");
> } catch (Exception e) {
> log.log(Level.SEVERE, "Failed in session cleanup", e);
> }
> }
>
> }
>
> This code, when run from the dev server makes this error
>
> Sep 11, 2009 3:50:53 PM lotr.server.SessionListener sessionDestroyed
> SEVERE: Failed in session cleanup
> java.lang.NullPointerException: No API environment is registered for
> this thread.
> at
> com.google.appengine.api.datastore.DatastoreApiHelper.getCurrentAppId
> (DatastoreApiHelper.java:63)
> at
> com.google.appengine.api.datastore.DatastoreApiHelper.getCurrentAppIdNamespace
> (DatastoreApiHelper.java:73)
> at com.google.appengine.api.datastore.Key.<init>(Key.java:100)
> at com.google.appengine.api.datastore.Key.<init>(Key.java:85)
> at com.google.appengine.api.datastore.Key.<init>(Key.java:81)
> at com.google.appengine.api.datastore.Entity.<init>(Entity.java:103)
> at com.google.appengine.api.datastore.Entity.<init>(Entity.java:84)
> at org.datanucleus.store.appengine.DatastoreFieldManager.<init>
> (DatastoreFieldManager.java:167)
> at
> org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObject
> (DatastorePersistenceHandler.java:178)
> 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 lotr.server.SessionListener.sessionDestroyed(SessionListener.java:
> 26)
> at org.mortbay.jetty.servlet.AbstractSessionManager.removeSession
> (AbstractSessionManager.java:661)
> at org.mortbay.jetty.servlet.AbstractSessionManager$Session.timeout
> (AbstractSessionManager.java:918)
> at org.mortbay.jetty.servlet.HashSessionManager.scavenge
> (HashSessionManager.java:200)
> at org.mortbay.jetty.servlet.HashSessionManager.access$000
> (HashSessionManager.java:36)
> at org.mortbay.jetty.servlet.HashSessionManager$1.run
> (HashSessionManager.java:144)
> at java.util.TimerThread.mainLoop(Unknown Source)
> at java.util.TimerThread.run(Unknown Source)
>
> On Sep 11, 11:37 am, "Jason (Google)" <apija...@google.com> wrote:
>
> > Hi Erum. Are you seeing this error in the development environment or in
> > production?
>
> > - Jason
>
> > On Wed, Sep 9, 2009 at 5:43 PM, Erem <ehb...@gmail.com> wrote:
>
> > > Hey All,
>
> > > What is the best way to tie into session destruction events?
>
> > > I have implemented an HttpSessionListener and put it in my web.xml.
> > > The SessionListener gets called, but any attempt to do DataStore or
> > > URLFetch API calls within sessionDestroyed results in errors.
>
> > > For example, the JDO API throws:
>
> > > Exception in thread "Timer-125" java.lang.NullPointerException: No API
> > > environment is registered for this thread.
> > > at
> > > com.google.appengine.api.datastore.DatastoreApiHelper.getCurrentAppId
> > > (DatastoreApiHelper.java:63)
> > > at com.google.appengine.api.datastore.QueryTranslator.convertToPb
> > > (QueryTranslator.java:35)
>
> > > My app has constructs of "Visitors" (anyone who comes to the site) and
> > > "Users" (verified accounts). The former's data get stored in sessions,
> > > the latter explicitly in the datastore.
>
> > > Every User has an ArrayList<Visitor>, listing the visitors currently
> > > logged in to the User's account.
>
> > > When a session is destroyed, meaning a Visitor has left, I want to
> > > remove that visitor from the user's "Logged in" ArrayList.
>
> > > Having trouble thinking of another way to do it =(
>
> > > Any advice would be much appreciated.
>
> > > Erem
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