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
19 from o2common.adapter.notifications import AbstractNotifications,\
21 from o2common.adapter import redis_eventpublisher
22 from o2common.service import unit_of_work
24 from o2app.service import handlers, messagebus
25 from o2app.adapter.unit_of_work import SqlAlchemyUnitOfWork
27 from o2ims.adapter import orm as o2ims_orm
28 from o2dms.adapter import orm as o2dms_orm
30 from o2common.helper import o2logging
31 logger = o2logging.get_logger(__name__)
34 @retry(tries=100, delay=2, backoff=1)
35 def wait_for_db_ready(engine):
37 logger.info("Wait for DB ready ...")
39 logger.info("DB is ready")
43 start_orm: bool = True,
44 uow: unit_of_work.AbstractUnitOfWork = SqlAlchemyUnitOfWork(),
45 notifications: AbstractNotifications = None,
46 publish: Callable = redis_eventpublisher.publish,
47 ) -> messagebus.MessageBus:
49 if notifications is None:
50 notifications = SmoO2Notifications()
54 # get default engine if uow is by default
55 engine = uow.session.get_bind()
56 wait_for_db_ready(engine)
57 o2ims_orm.start_o2ims_mappers(engine)
58 o2dms_orm.start_o2dms_mappers(engine)
60 dependencies = {"uow": uow, "notifications": notifications,
62 injected_event_handlers = {
64 inject_dependencies(handler, dependencies)
65 for handler in event_handlers
67 for event_type, event_handlers in handlers.EVENT_HANDLERS.items()
69 injected_command_handlers = {
70 command_type: inject_dependencies(handler, dependencies)
71 for command_type, handler in handlers.COMMAND_HANDLERS.items()
74 return messagebus.MessageBus(
76 event_handlers=injected_event_handlers,
77 command_handlers=injected_command_handlers,
81 def inject_dependencies(handler, dependencies):
82 params = inspect.signature(handler).parameters
85 for name, dependency in dependencies.items()
88 return lambda message: handler(message, **deps)