Comment 8 for bug 1359416

Reviewed: https://review.openstack.org/115799
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=42a8770a49e0342acffa7fdde22655c98e783184
Submitter: Jenkins
Branch: master

commit 42a8770a49e0342acffa7fdde22655c98e783184
Author: Akihiro Motoki <email address hidden>
Date: Tue Aug 19 04:14:31 2014 +0900

    Make DhcpRpcCallback a separate callback class

    RPC has a version of itself. In Neutron a plugin implements
    several RPC interface, so a single RPC version doesn't work.
    In Mixin callback class approach, RPC versioning depends on
    each plugin implementation and it makes harder to maintain
    RPC version appropriately. This patch series replaces mixin
    RPC callback of server side with a separate class.

    This commit handles server-side callback of dhcp-agent RPC interface.
    DHCP-agent server-side callback class is moved from db/ to
    api/rpc/handlers because it doesn't involve any db operations
    and defining all RPC interfaces in a single place sounds reasonable.

    Note that moving other DHCP-agent related RPC interface class
    to api/rpc/handlers can be done in a separate patch as this patch
    focuses on reorganizing the server-side RPC callback class.

    Partial-Bug: #1359416
    Change-Id: Ifb2a1bc0b7971995aae2856c9d4cd88c6dbc22d6