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#
# -------------------------------------------------------------------------
# Copyright (c) 2015-2017 AT&T Intellectual Property
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# -------------------------------------------------------------------------
#
from oslo_config import cfg
from conductor.common import music
from conductor.common.music.messaging import component
DEFAULT_URL = "__default__"
TRANSPORTS = {}
CONF = cfg.CONF
# Pull in messaging server opts. We use them here.
MESSAGING_SERVER_OPTS = component.MESSAGING_SERVER_OPTS
CONF.register_opts(MESSAGING_SERVER_OPTS, group='messaging_server')
def setup():
"""Messaging setup, if any"""
# oslo_messaging.set_transport_defaults('conductor')
pass
# TODO(jdandrea): Remove Music-specific aspects (keyspace -> namespace?)
# TODO(jdandrea): Make Music an oslo rpc backend (difficulty level: high?)
def get_transport(conf, url=None, optional=False, cache=True):
"""Initialise the Music messaging layer."""
global TRANSPORTS
cache_key = url or DEFAULT_URL
transport = TRANSPORTS.get(cache_key)
if not transport or not cache:
try:
# "Somebody set up us the API." ;)
# Yes, we know an API is not a transport. Cognitive dissonance FTW!
# TODO(jdandrea): try/except to catch problems
keyspace = conf.messaging_server.keyspace
transport = music.api.API()
transport.keyspace_create(keyspace=keyspace)
except Exception:
if not optional or url:
# NOTE(sileht): oslo_messaging is configured but unloadable
# so reraise the exception
raise
return None
else:
if cache:
TRANSPORTS[cache_key] = transport
return transport
def cleanup():
"""Cleanup the Music messaging layer."""
global TRANSPORTS
for url in TRANSPORTS:
del TRANSPORTS[url]
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