395ccbd94c
In this changeset, I cleaned up the Watcher codebase to remove the old notification mechanism that is actually unused. Partially Implements: blueprint watcher-notifications-ovo Change-Id: I1901e65f031441b98a7d6f6c9c1c0364eaaaf481
58 lines
1.8 KiB
Python
58 lines
1.8 KiB
Python
# -*- encoding: utf-8 -*-
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# Copyright (c) 2015 b<>com
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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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from watcher.common.messaging.utils import synchronization
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class Observable(synchronization.Synchronization):
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def __init__(self):
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super(Observable, self).__init__()
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self.__observers = []
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self.changed = 0
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def set_changed(self):
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self.changed = 1
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def clear_changed(self):
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self.changed = 0
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def has_changed(self):
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return self.changed
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def register_observer(self, observer):
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if observer not in self.__observers:
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self.__observers.append(observer)
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def unregister_observer(self, observer):
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try:
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self.__observers.remove(observer)
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except ValueError:
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pass
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def notify(self, ctx=None, publisherid=None, event_type=None,
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metadata=None, payload=None, modifier=None):
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self.mutex.acquire()
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try:
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if not self.changed:
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return
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for observer in self.__observers:
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if modifier != observer:
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observer.update(self, ctx, metadata, publisherid,
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event_type, payload)
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self.clear_changed()
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finally:
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self.mutex.release()
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