Comment 29 for bug 1665215

Reviewed: https://review.openstack.org/454191
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=323eb7f2e146ecc2f7c25d59e57d1e1e006cb71f
Submitter: Jenkins
Branch: master

commit 323eb7f2e146ecc2f7c25d59e57d1e1e006cb71f
Author: Kevin Benton <email address hidden>
Date: Thu Apr 6 05:42:25 2017 -0700

    Add some bulk lookup methods to ML2 for RPC handling

    This adds three methods to make working with bulk port
    DB lookups easier in ML2:

    * partial_port_ids_to_full_ids: takes short port IDs map to
      full port IDs. This will allow us to eliminate many LIKE
      queries and do one just once for all ports on an RPC call.
    * get_port_db_objects: Takes a list of port IDs and returns
      a map to port DB objects. This allows us to get access to
      sqla obejcts for a bunch of ports without a custom
      session.query call.
    * get_network_contexts: Takes a list of network_ids and does
      a bulk construction of NetworkContext objects and returns
      them as a map of network_id to NetworkContext to avoid
      expensive net lookups when constructing lots of PortContext
      objects.

    Partial-Bug: #1665215
    Change-Id: I330eefbf429bd62f2a7e8ebadf7037da15c86815