1 # Copyright (C) 2021 Wind River Systems, Inc.
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
16 from typing import Callable
17 from o2ims.adapter import orm, redis_eventpublisher
18 from o2ims.adapter.notifications import AbstractNotifications, SmoO2Notifications
20 from o2ims.service import handlers, messagebus, unit_of_work
24 start_orm: bool = True,
25 uow: unit_of_work.AbstractUnitOfWork = unit_of_work.SqlAlchemyUnitOfWork(),
26 notifications: AbstractNotifications = None,
27 publish: Callable = redis_eventpublisher.publish,
28 ) -> messagebus.MessageBus:
30 if notifications is None:
31 notifications = SmoO2Notifications()
34 orm.start_o2ims_mappers()
36 dependencies = {"uow": uow, "notifications": notifications, "publish": publish}
37 injected_event_handlers = {
39 inject_dependencies(handler, dependencies)
40 for handler in event_handlers
42 for event_type, event_handlers in handlers.EVENT_HANDLERS.items()
44 injected_command_handlers = {
45 command_type: inject_dependencies(handler, dependencies)
46 for command_type, handler in handlers.COMMAND_HANDLERS.items()
49 return messagebus.MessageBus(
51 event_handlers=injected_event_handlers,
52 command_handlers=injected_command_handlers,
56 def inject_dependencies(handler, dependencies):
57 params = inspect.signature(handler).parameters
60 for name, dependency in dependencies.items()
63 return lambda message: handler(message, **deps)