77b7fae41e
In this changeset, I implemented the notification handling (Rx only) system for consuming incoming notifications, more especially the Nova ones. The notifications handlers also contain the logic which incrementally updates the Compute model. Change-Id: Ia036a5a2be6caa64b7f180de38821b57c624300c Partially-implements: blueprint cluster-model-objects-wrapper
111 lines
3.7 KiB
Python
111 lines
3.7 KiB
Python
# -*- encoding: utf-8 -*-
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# Copyright (c) 2015 b<>com
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#
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# Authors: Jean-Emile DARTOIS <jean-emile.dartois@b-com.com>
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# Alexander Chadin <a.chadin@servionica.ru>
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import abc
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import six
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from oslo_log import log
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from watcher.common.messaging.events import event as watcher_event
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from watcher.decision_engine.messaging import events as de_events
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from watcher.decision_engine.planner import manager as planner_manager
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from watcher.decision_engine.strategy.context import default as default_context
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from watcher.objects import audit as audit_objects
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LOG = log.getLogger(__name__)
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@six.add_metaclass(abc.ABCMeta)
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class BaseAuditHandler(object):
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@abc.abstractmethod
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def execute(self, audit_uuid, request_context):
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raise NotImplementedError()
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@abc.abstractmethod
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def pre_execute(self, audit_uuid, request_context):
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raise NotImplementedError()
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@abc.abstractmethod
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def do_execute(self, audit, request_context):
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raise NotImplementedError()
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@abc.abstractmethod
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def post_execute(self, audit, solution, request_context):
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raise NotImplementedError()
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@six.add_metaclass(abc.ABCMeta)
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class AuditHandler(BaseAuditHandler):
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def __init__(self, messaging):
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self._messaging = messaging
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self._strategy_context = default_context.DefaultStrategyContext()
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self._planner_manager = planner_manager.PlannerManager()
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self._planner = None
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@property
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def planner(self):
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if self._planner is None:
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self._planner = self._planner_manager.load()
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return self._planner
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@property
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def messaging(self):
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return self._messaging
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@property
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def strategy_context(self):
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return self._strategy_context
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def notify(self, audit_uuid, event_type, status):
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event = watcher_event.Event()
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event.type = event_type
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event.data = {}
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payload = {'audit_uuid': audit_uuid,
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'audit_status': status}
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self.messaging.publish_status_event(event.type.name, payload)
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def update_audit_state(self, request_context, audit, state):
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LOG.debug("Update audit state: %s", state)
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audit.state = state
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audit.save()
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self.notify(audit.uuid, de_events.Events.TRIGGER_AUDIT, state)
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def pre_execute(self, audit, request_context):
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LOG.debug("Trigger audit %s", audit.uuid)
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# change state of the audit to ONGOING
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self.update_audit_state(request_context, audit,
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audit_objects.State.ONGOING)
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def post_execute(self, audit, solution, request_context):
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self.planner.schedule(request_context, audit.id, solution)
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# change state of the audit to SUCCEEDED
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self.update_audit_state(request_context, audit,
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audit_objects.State.SUCCEEDED)
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def execute(self, audit, request_context):
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try:
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self.pre_execute(audit, request_context)
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solution = self.do_execute(audit, request_context)
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self.post_execute(audit, solution, request_context)
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except Exception as e:
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LOG.exception(e)
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self.update_audit_state(request_context, audit,
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audit_objects.State.FAILED)
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