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# Copyright 2014 OpenStack Foundation
# All Rights Reserved.
#
# 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.
# NOTE(esp): This code was taken from nova
__all__ = [
'init',
'cleanup',
'set_defaults',
'add_extra_exmods',
'clear_extra_exmods',
'get_allowed_exmods',
'RequestContextSerializer',
'get_client',
'get_server',
'get_notifier',
'TRANSPORT_ALIASES',
]
from oslo_config import cfg
import oslo_messaging as messaging
from oslo_serialization import jsonutils
from osprofiler import profiler
from trove.common.context import TroveContext
import trove.common.exception
CONF = cfg.CONF
TRANSPORT = None
NOTIFIER = None
ALLOWED_EXMODS = [
trove.common.exception.__name__,
]
EXTRA_EXMODS = []
# TODO(esp): Remove or update these paths
TRANSPORT_ALIASES = {
'trove.openstack.common.rpc.impl_kombu': 'rabbit',
'trove.openstack.common.rpc.impl_qpid': 'qpid',
'trove.openstack.common.rpc.impl_zmq': 'zmq',
'trove.rpc.impl_kombu': 'rabbit',
'trove.rpc.impl_qpid': 'qpid',
'trove.rpc.impl_zmq': 'zmq',
}
def init(conf):
global TRANSPORT, NOTIFIER
exmods = get_allowed_exmods()
TRANSPORT = messaging.get_transport(conf,
allowed_remote_exmods=exmods,
aliases=TRANSPORT_ALIASES)
serializer = RequestContextSerializer(JsonPayloadSerializer())
NOTIFIER = messaging.Notifier(TRANSPORT, serializer=serializer)
def cleanup():
global TRANSPORT, NOTIFIER
assert TRANSPORT is not None
assert NOTIFIER is not None
TRANSPORT.cleanup()
TRANSPORT = NOTIFIER = None
def set_defaults(control_exchange):
messaging.set_transport_defaults(control_exchange)
def add_extra_exmods(*args):
EXTRA_EXMODS.extend(args)
def clear_extra_exmods():
del EXTRA_EXMODS[:]
def get_allowed_exmods():
return ALLOWED_EXMODS + EXTRA_EXMODS
class JsonPayloadSerializer(messaging.NoOpSerializer):
@staticmethod
def serialize_entity(context, entity):
return jsonutils.to_primitive(entity, convert_instances=True)
class RequestContextSerializer(messaging.Serializer):
def __init__(self, base):
self._base = base
def serialize_entity(self, context, entity):
if not self._base:
return entity
return self._base.serialize_entity(context, entity)
def deserialize_entity(self, context, entity):
if not self._base:
return entity
return self._base.deserialize_entity(context, entity)
def serialize_context(self, context):
_context = context.to_dict()
prof = profiler.get()
if prof:
trace_info = {
"hmac_key": prof.hmac_key,
"base_id": prof.get_base_id(),
"parent_id": prof.get_id()
}
_context.update({"trace_info": trace_info})
return _context
def deserialize_context(self, context):
trace_info = context.pop("trace_info", None)
if trace_info:
profiler.init(**trace_info)
return TroveContext.from_dict(context)
def get_transport_url(url_str=None):
return messaging.TransportURL.parse(CONF, url_str, TRANSPORT_ALIASES)
def get_client(target, version_cap=None, serializer=None):
assert TRANSPORT is not None
serializer = RequestContextSerializer(serializer)
return messaging.RPCClient(TRANSPORT,
target,
version_cap=version_cap,
serializer=serializer)
def get_server(target, endpoints, serializer=None):
assert TRANSPORT is not None
# Thread module is not monkeypatched if remote debugging is enabled.
# Using eventlet executor without monkepatching thread module will
# lead to unpredictable results.
from trove.common import debug_utils
debug_utils.setup()
executor = "blocking" if debug_utils.enabled() else "eventlet"
serializer = RequestContextSerializer(serializer)
return messaging.get_rpc_server(TRANSPORT,
target,
endpoints,
executor=executor,
serializer=serializer)
def get_notifier(service=None, host=None, publisher_id=None):
assert NOTIFIER is not None
if not publisher_id:
publisher_id = "%s.%s" % (service, host or CONF.host)
return NOTIFIER.prepare(publisher_id=publisher_id)
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