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.
15 from retry import retry
17 from typing import Callable
18 from o2ims.adapter import orm, redis_eventpublisher
19 from o2ims.adapter.notifications import AbstractNotifications,\
22 from o2ims.service import handlers, messagebus, unit_of_work
23 from o2ims.adapter.unit_of_work import SqlAlchemyUnitOfWork
24 from o2ims.adapter.clients import orm_stx
25 from o2common.helper import o2logging
26 logger = o2logging.get_logger(__name__)
29 @retry(tries=100, delay=2, backoff=1)
30 def wait_for_db_ready(engine):
32 logger.info("Wait for DB ready ...")
34 logger.info("DB is ready")
38 start_orm: bool = True,
39 uow: unit_of_work.AbstractUnitOfWork = SqlAlchemyUnitOfWork(),
40 notifications: AbstractNotifications = None,
41 publish: Callable = redis_eventpublisher.publish,
42 ) -> messagebus.MessageBus:
44 if notifications is None:
45 notifications = SmoO2Notifications()
49 # get default engine if uow is by default
50 engine = uow.session.get_bind()
51 wait_for_db_ready(engine)
52 orm.start_o2ims_mappers(engine)
54 orm_stx.start_o2ims_stx_mappers(uow)
56 dependencies = {"uow": uow, "notifications": notifications,
58 injected_event_handlers = {
60 inject_dependencies(handler, dependencies)
61 for handler in event_handlers
63 for event_type, event_handlers in handlers.EVENT_HANDLERS.items()
65 injected_command_handlers = {
66 command_type: inject_dependencies(handler, dependencies)
67 for command_type, handler in handlers.COMMAND_HANDLERS.items()
70 return messagebus.MessageBus(
72 event_handlers=injected_event_handlers,
73 command_handlers=injected_command_handlers,
77 def inject_dependencies(handler, dependencies):
78 params = inspect.signature(handler).parameters
81 for name, dependency in dependencies.items()
84 return lambda message: handler(message, **deps)