Will you post the trace to http://filebin.ca/ so we can take a look at it?
Thanks, Rick 2010/1/22 Håkon Sagehaug <hakon.sageh...@uni.no> > Hi all, > > I still got his problem and can't seem to resolve it so I'll try again to > see if anyone has any tips. set up is like this I've got a web service that > can fetch large files from either ftp or http, when a file is fetched with > one of these protocols, a new thread is started and downloads the file. > Before the thread is started a new entry in the database is entered, after > the download is complete we fetch the db entry and update the entry to say > where the file was stored and size and set state to Finished. This works > fine in a "stand alone" mode. But when we have an application that asks for > the status(say every 2 sec ), by fetching the database entry and looking to > see if that state of the db entry is finished, the update of the database > entry never happens. The thread that should update the db entry has it's > own > EntityManager. The bethod that fetches the dn entry does not use a > transaction, just entitymanger instance. > > Does anyone have any tips on how to resolve this?? > > cheers, Håkon > > 2010/1/15 Håkon Sagehaug <hakon.sageh...@uni.no> > > > Hi > > > > Will adding a version and locking properties to the entities help with > this > > matter? > > > > cheers, Håkon > > > > 2010/1/13 Håkon Sagehaug <hakon.sageh...@uni.no> > > > > Hi Simone, > >> > >> The update does not raise any exceptions. I have no version on the > entity, > >> and not configured locking. I read alittle about locking, does it also > apply > >> outside a transaction, the update operations is in a transactions but > the > >> read is not. > >> > >> cheers, Håkon > >> > >> 2010/1/12 Simone Gianni <simo...@apache.org> > >> > >> Hi Håkon, > >>> is the update of the entity on the database raising any exception? Or > it > >>> silently refuses updating the database? > >>> > >>> Are you using a version field for optimistic locking? > >>> > >>> Simone > >>> > >>> > >>> Håkon Sagehaug wrote: > >>> > >>>> Hi all, > >>>> > >>>> I've got a problem I'm not sure how to solve. The problems is as > >>>> follows. > >>>> We got a web service that can grab files from a ftp or http site, we > use > >>>> openjpa to store metadate about the resource, like name, when inserted > >>>> etc. > >>>> After this we write this information to the db and a new thread is > >>>> started > >>>> to download the file, after this is finished the db entry is retrieved > >>>> and > >>>> updated, with a status message, saying that the download was complete. > >>>> > >>>> We then have a client the after it sends a request, will poll the > >>>> service > >>>> using a operation called getResource(id), to see if the state is the > to > >>>> finished. The problem we see is that when the client issue a > getResource > >>>> we > >>>> can't update the entry in the database. The file is downloaded, but > the > >>>> information in db isn't updated. If we issue the request getresource > >>>> after a > >>>> delay(2sec), on the client side everything works fine. > >>>> > >>>> Is there some synchonization needed, the web services used the same > >>>> EntityManagerFactoryFactory but each method has it's own EntityManager > >>>> object, also the thread downloaded the file. > >>>> > >>>> Have anyone experienced this? > >>>> > >>>> cheers, Håkon > >>>> > >>>> > >>>> > >>> > >>> > >>> -- > >>> Simone Gianni CEO Semeru s.r.l. Apache Committer > >>> http://www.simonegianni.it/ > >>> > >>> > >> > >> > >> > >> > > > > > > > -- > Håkon Sagehaug, Scientific Programmer > Parallab, Bergen Center for Computational Science(BCCS) > Uni BCCS/Uni Research > hakon.sageh...@uni.no, phone +47 55584125 >
