publisher can't publish to multiple queue topics

[gordon chung]

this is a "nice to have". currently, we publish to a single topic for events and sample data (one each). it would be a nice feature to allow the ability to publish to multiple topics so we can have different consumers for different data.

one use case would be to publish datasetA to one topic and have datasetB (which has confidential data) to be published to another topic. this would allow us to possibly store the two datasets in completely different datastores and have segregation of data... this would resolve this: https://bugs.launchpad.net/ceilometer/+bug/1376915

the solution would be to allow an overriding the default topic (https://github.com/openstack/ceilometer/blob/master/ceilometer/publisher/messaging.py#L44-L60) in the url of publisher:

ie. notifier://?topic=<new topic>&...

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/164840

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/164840
Committed: https://git.openstack.org/cgit/openstack/ceilometer/commit/?id=ff2eaa345ec8fe4f2828cf66c11fdbd9e89398f7
Submitter: Jenkins
Branch: master

commit ff2eaa345ec8fe4f2828cf66c11fdbd9e89398f7
Author: gordon chung <email address hidden>
Date: Mon Mar 16 15:42:09 2015 -0400

    add ability to publish to multiple topics

    allow the ability to publish to multiple topics so we can have
    different consumers for different data. this is done by allowing
    users to specify a topic for each publisher rather than using
    the standard CONF option.

    DocImpact
    Closes-Bug: #1431922

    Change-Id: Ib919cfa302e05653c788ea84a08eafbca4fe843c