[openstack-dev] Adding notifications to Horizon

Sandy Walsh sandy.walsh at rackspace.com
Mon Nov 25 16:30:05 UTC 2013

+1 on the inline method. It makes it clear when a notification should be
emitted and, as you say, handles the exception handling better.

Also, if it makes sense for Horizon, consider bracketing long-running
operations in .start/.end pairs. This will help with performance tuning
and early error detection.

More info on "well behaved notifications" in here:

Great to see!


On 11/25/2013 11:58 AM, Florent Flament wrote:
> Hi,
> I am interested in adding AMQP notifications to the Horizon dashboard,
> as described in the following blueprint:
> https://blueprints.launchpad.net/horizon/+spec/horizon-notifications
> There are currently several implementations in Openstack. While
> Nova and Cinder define `notify_about_*` methods that are called
> whenever a notification has to be sent, Keystone uses decorators,
> which send appropriate notifications when decorated methods are
> called.
> I fed the blueprint's whiteboard with an implementation proposal,
> based on Nova and Cinder implementation. I would be interested in
> having your opinion about which method would fit best, and whether
> these notifications make sense at all.
> Cheers,
> Florent Flament
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> OpenStack-dev at lists.openstack.org
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