I am using ERXEC with default settings. I guess it takes care of the locking automatically.
Sent from my iPad On 11-Aug-2010, at 11:58 PM, Chuck Hill <[email protected]> wrote: > > On Aug 11, 2010, at 1:41 PM, Farrukh Ijaz wrote: > >> >> >> Sent from my iPad >> >> On 11-Aug-2010, at 7:35 PM, Chuck Hill <[email protected]> wrote: >> >>> >>> On Aug 11, 2010, at 2:11 AM, Farrukh Ijaz wrote: >>> >>>> Hi All, >>>> >>>> Is it safe to invoke editingContext().saveChange() or >>>> editingContext().revert() in a method that is used through NSSelector and >>>> invoked by the NSNotificationCenter on postNotification()? >>> >>> >>> That likely depends on which notification. >> >> Okay, here is the real scenario. I have developed a Workflow Engine which is >> capable to run multiple workflows in parallel in their individual threads. >> Each workflow has methods as start(), stop(), suspend(), and resume(). The >> behavior of these methods is understood. Everything remains in memory. Now >> in order to persist their state I have created a corresponding entity. There >> are two columns of the entity, status and serializedInstance which change at >> any stage and that is depending upon user actions and workflow code. >> >> I have a workflow management dashboard which provides ability to view all >> the workflows defined in the system and to start, stop, resume and suspend. >> When I start the workflow, I call the method start() of the workflow entity, >> which internally triggers the associated workflow's start() method and also >> registers the entity to receive notifications from the workflow thread. The >> workflow thread post notifications such as when it completes the job or >> explicitly stopped, resumed, suspended etc. So upon these notifications, the >> workflow entity's onNotify() method is invoked which in turn based on the >> message, modifies the status column and serializedInstance column value and >> invokes, editingContext().saveChanges() inside the onNotify() method. > > You will have to make sure that the EC is locked before touching any of the > entity's persistent values or calling saveChanges() > >> >> I guess the story is too long but it is working fine so far. I just want to >> confirm that if this does not break anything at any stage or cause a >> deadlock situation? >> >>> >>> Chuck >>> >>> -- >>> Chuck Hill Senior Consultant / VP Development >>> >>> Practical WebObjects - for developers who want to increase their overall >>> knowledge of WebObjects or who are trying to solve specific problems. >>> http://www.global-village.net/products/practical_webobjects >>> >>> >>> >>> >>> >>> >>> > > -- > Chuck Hill Senior Consultant / VP Development > > Practical WebObjects - for developers who want to increase their overall > knowledge of WebObjects or who are trying to solve specific problems. > http://www.global-village.net/products/practical_webobjects > > > > > > > _______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [email protected]
