• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
Re: WOJC Thread-Problem... makes me crazy
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: WOJC Thread-Problem... makes me crazy


  • Subject: Re: WOJC Thread-Problem... makes me crazy
  • From: Nick Pilch <email@hidden>
  • Date: Thu, 8 Jan 2004 10:30:39 -0800

I have found that the implementation of the server code to handle client requests is not thread-safe. However, this only manifested itself if I was handling multiple client requests at the same time (WOAllowsConcurrentRequestHandling = true). I suggest that you at least set this to false.

Perhaps you will need to either give the client WOSession or your "TimerThread" a separate EOF stack or serialize your thread with the handling of client requests. Although EOF is supposedly thread-safe (with proper locking), I find that the safest route is to use a separate EOF per thread.

At 6:41 AM +0100 1/8/04, Oliver Leu wrote:
Dear list

WO5.2 Mac OSX 10.2, Non-Direct2JavaClient with InterfaceBuilder.

I added a "TimerThread" to my server.
That thread scans every 30 seconds an directory on the server.
If my thread finds some information in the directory, the thread does a lot
of operations like parsing files, serializing objects, writing them to disk,
write some
informations to the DB (openbase) using EOF.

And it works!

BUT...

In case a client accesses the DB (ec), the serverthread doesn't the work
anymore!
No, error-mess., no exception, nothing.
Eventually I produced a deadlock? But I'm not experienced in
thread-programming.
I also tried to lock the ec [lock(), unlock()], but without a resultat.

On serverside I get the ec via:
Session session= new Session();
ec = session.defaultEditingContext();

I assume that the mistake is "around wrong handling of editing context"?!

Thanks for your help.

Oliver
***
_______________________________________________
webobjects-dev mailing list | email@hidden
Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/webobjects-dev
Do not post admin requests to the list. They will be ignored.


--

Nick Pilch / email@hidden
_______________________________________________
webobjects-dev mailing list | email@hidden
Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/webobjects-dev
Do not post admin requests to the list. They will be ignored.

References: 
 >WOJC Thread-Problem... makes me crazy (From: "Oliver Leu" <email@hidden>)

  • Prev by Date: passing parameters to an action
  • Next by Date: Re: passing parameters to an action
  • Previous by thread: WOJC Thread-Problem... makes me crazy
  • Next by thread: passing parameters to an action
  • Index(es):
    • Date
    • Thread