Horizon Ajax cleanup

[Sam Betts]

Clean up of horizon Ajax code to allow for better management of many tasks that have to wait for each other to finish.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/172067

[Rob Cresswell (robcresswell-deactivatedaccount)]

Sorry for the noise there, got my tabs muddled.

[kennychu (kenny-chu123)]

Hi, I hit an issue that can't scroll table when launch mass instances.
Use cli 'nova list' found I had over 8000 instances that included terminated instances.
And it cost about 30 seconds to get data. Is my issue related the bug ?

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/172067
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=574228c1ba2e7649ae1a1180b15bdef7ae5bda5c
Submitter: Jenkins
Branch: master

commit 574228c1ba2e7649ae1a1180b15bdef7ae5bda5c
Author: Sam Betts <email address hidden>
Date: Thu Apr 9 14:20:16 2015 +0100

    Use JQuery promise/deferred objects to track AJAX

    The JQuery library offers objects known as deferred for tracking
    multiple call backs, this can be used with AJAX to track cases when we
    only want to do something once multiple requests are complete such as
    re-calling the datatables update method.

    This also allows for us to track the completed state of a request in the
    ajax queue without injecting a custom completed callback into every
    request that is handled by the queue.

    Change-Id: I7d5acb6d05a5822b2de7d73678797166276ac599
    Closes-Bug: 1442146

[Doug Hellmann (doug-hellmann)]

This issue was fixed in the openstack/horizon 10.0.0.0b2 development milestone.