| # |
| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| # |
| |
| """ |
| Utility for monitoring collected data. |
| |
| Author: Jeff Kinnison (jkinniso@nd.edu) |
| """ |
| |
| # TODO: Add method to add handlers |
| # TODO: Add method to create PikaProducer |
| # TODO: Add method to use PikaProducer to respond to events |
| # TODO: Add method to deactivate monitor |
| |
| |
| class EventCheckerNotCallableException(Exception): |
| pass |
| |
| |
| class EventHandlerNotCallableException(Exception): |
| pass |
| |
| |
| class EventHandlerDoesNotExistException(Exception): |
| pass |
| |
| |
| class EventMonitor(object): |
| """Checks data for user-defined bounds violations. |
| |
| Instance variables: |
| handlers -- a dict of EventHandler objects indexed by name |
| """ |
| def __init__(self, event_check, handlers={}): |
| self._event_check = event_check |
| self.handlers = handlers |
| |
| def __call__(self, val): |
| if not callable(self._event_check): |
| raise EventCheckerNotCallableException |
| self._run_handler(self.event_check(val)) |
| |
| def _run_handler(self, handler_names): |
| for name in handler_names: |
| if name not in self.handlers: |
| raise EventHandlerDoesNotExistException |
| if not callable(self.handlers[name]): |
| raise EventHandlerNotCallableException |
| self.handlers[name]() |