The Opflex request_endpoint_details RPC handler is reimplemented in
the apic_aim mechanism driver, using a minimal set of baked DB
queries. These queries return specific individual column data rather
than entire ORM objects, eliminating the sqlalchemy and DB server
overhead for relationship processing. Joins are used to minimize the
number of queries made to the DB server. Rather than using or
emulating the dictionaries returned by Neutron's get_<resource>()
methods, the RPC response is built directly from the data returned
from the queries.
The older RPC handler implementations remain during testing to allow
performance and scalability comparison. A single implementation will
eventually be selected and the others removed. Until then, the new RPC
handler is enabled by setting the enable_new_rpc config variable.
Change-Id: I614d5bca3f101ceab06e2fad1a59f5514b438473
6d09dbfddd