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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. 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 > > > > > > > _______________________________________________ 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]
