143 lines
3.6 KiB
Python
143 lines
3.6 KiB
Python
# Copyright 2015 Huawei Technologies Co. Ltd
|
|
#
|
|
# 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 oslo_log import log as logging
|
|
from oslo_messaging.rpc import client
|
|
|
|
from terracotta import context as auth_ctx
|
|
from terracotta import exceptions as exc
|
|
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
_TRANSPORT = None
|
|
_ENGINE_CLIENT = None
|
|
_EXECUTOR_CLIENT = None
|
|
|
|
|
|
def cleanup():
|
|
"""Intended to be used by tests to recreate all RPC related objects."""
|
|
|
|
global _TRANSPORT
|
|
global _ENGINE_CLIENT
|
|
global _EXECUTOR_CLIENT
|
|
|
|
_TRANSPORT = None
|
|
_ENGINE_CLIENT = None
|
|
_EXECUTOR_CLIENT = None
|
|
|
|
|
|
def get_transport():
|
|
global _TRANSPORT
|
|
|
|
if not _TRANSPORT:
|
|
_TRANSPORT = messaging.get_transport(cfg.CONF)
|
|
|
|
return _TRANSPORT
|
|
|
|
|
|
def get_engine_client():
|
|
global _ENGINE_CLIENT
|
|
|
|
if not _ENGINE_CLIENT:
|
|
_ENGINE_CLIENT = EngineClient(get_transport())
|
|
|
|
return _ENGINE_CLIENT
|
|
|
|
|
|
def get_executor_client():
|
|
global _EXECUTOR_CLIENT
|
|
|
|
if not _EXECUTOR_CLIENT:
|
|
_EXECUTOR_CLIENT = ExecutorClient(get_transport())
|
|
|
|
return _EXECUTOR_CLIENT
|
|
|
|
|
|
class GlobalManagerServer(object):
|
|
"""RPC Engine server."""
|
|
|
|
def __init__(self, manager):
|
|
self._manager = manager
|
|
|
|
|
|
def wrap_messaging_exception(method):
|
|
"""This decorator unwrap remote error in one of MistralException.
|
|
|
|
oslo.messaging has different behavior on raising exceptions
|
|
when fake or rabbit transports are used. In case of rabbit
|
|
transport it raises wrapped RemoteError which forwards directly
|
|
to API. Wrapped RemoteError contains one of MistralException raised
|
|
remotely on Engine and for correct exception interpretation we
|
|
need to unwrap and raise given exception and manually send it to
|
|
API layer.
|
|
"""
|
|
def decorator(*args, **kwargs):
|
|
try:
|
|
return method(*args, **kwargs)
|
|
|
|
except client.RemoteError as e:
|
|
exc_cls = getattr(exc, e.exc_type)
|
|
raise exc_cls(e.value)
|
|
|
|
return decorator
|
|
|
|
|
|
class EngineClient(base.Engine):
|
|
"""RPC Engine client."""
|
|
|
|
def __init__(self, transport):
|
|
"""Constructs an RPC client for engine.
|
|
|
|
:param transport: Messaging transport.
|
|
"""
|
|
serializer = auth_ctx.RpcContextSerializer(
|
|
auth_ctx.JsonPayloadSerializer())
|
|
|
|
self._client = messaging.RPCClient(
|
|
transport,
|
|
messaging.Target(topic=cfg.CONF.engine.topic),
|
|
serializer=serializer
|
|
)
|
|
|
|
|
|
class LocalManagerServer(object):
|
|
"""RPC Executor server."""
|
|
|
|
def __init__(self, manager):
|
|
self._executor = manager
|
|
|
|
|
|
class ExecutorClient(base.Executor):
|
|
"""RPC Executor client."""
|
|
|
|
def __init__(self, transport):
|
|
"""Constructs an RPC client for the Executor.
|
|
|
|
:param transport: Messaging transport.
|
|
:type transport: Transport.
|
|
"""
|
|
serializer = auth_ctx.RpcContextSerializer(
|
|
auth_ctx.JsonPayloadSerializer()
|
|
)
|
|
|
|
self.topic = cfg.CONF.executor.topic
|
|
self._client = messaging.RPCClient(
|
|
transport,
|
|
messaging.Target(),
|
|
serializer=serializer
|
|
)
|