Hi, Winson, This is great!
But I have a question: > 9. Operation in python-mistralclient to re-publish events for a given > workflow execution (in case where client applications was downed and need > the data to recover). How does Mistral know about all the events which it has already sent to subscriber? I guess you propose to store this data in EventSubscriber object. Correct me if I mistaked. On Tue, Nov 11, 2014 at 11:28 PM, W Chan <m4d.co...@gmail.com> wrote: > Regarding blueprint to register event listeners to notify client > applications on state changes ( > https://blueprints.launchpad.net/mistral/+spec/mistral-event-listeners-http), > I want to propose the following. > > 1. Refer this feature as event subscription instead of callback > 2. Event subscription supports only HTTP web hooks with retry policy in > this first attempt > 3. Event subscription can be defined for a list of specific events, > workflows, projects, domains, or any combinations (all if list is empty). > 4. Decorator to publish event (similar to logging) and place decorators at > Engine and TaskPolicy methods @ > https://github.com/stackforge/mistral/blob/master/mistral/engine1/base.py > . > 5. Events should be published to a queue and then processed by a worker so > not to disrupt actual workflow/task executions. > 6. API controller to register event subscriber > a. New resource type named EventSubscriber > b. New REST controller named EventSubscribersController and CRUD > operations > 7. DB v2 sqlalchemy model named EventSubscriber and appropriate CRUD > methods > 8. Operations in python-mistralclient to manage CRUD for subscribers. > 9. Operation in python-mistralclient to re-publish events for a given > workflow execution (in case where client applications was downed and need > the data to recover). > > > _______________________________________________ > OpenStack-dev mailing list > OpenStackfirstname.lastname@example.org > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > > -- Best Regards, Nikolay
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