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| #!/usr/bin/python | |
| # -*- coding: utf-8 -*- | |
| # Hive Appier Framework | |
| # Copyright (c) 2008-2024 Hive Solutions Lda. | |
| # | |
| # This file is part of Hive Appier Framework. | |
| # | |
| # Hive Appier Framework is free software: you can redistribute it and/or modify | |
| # it under the terms of the Apache License as published by the Apache | |
| # Foundation, either version 2.0 of the License, or (at your option) any | |
| # later version. | |
| # | |
| # Hive Appier Framework is distributed in the hope that it will be useful, | |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| # Apache License for more details. | |
| # | |
| # You should have received a copy of the Apache License along with | |
| # Hive Appier Framework. If not, see <http://www.apache.org/licenses/>. | |
| __author__ = "João Magalhães <joamag@hive.pt>" | |
| """ The author(s) of the module """ | |
| __copyright__ = "Copyright (c) 2008-2024 Hive Solutions Lda." | |
| """ The copyright for the module """ | |
| __license__ = "Apache License, Version 2.0" | |
| """ The license for the module """ | |
| import logging | |
| from . import util | |
| from . import common | |
| class Component(object): | |
| """ | |
| Top level component class to be used as an abstract definition | |
| of a loadable/unloadable component of the system. | |
| This provides a strict (yet simple) set of rules to how such | |
| component should behave and the life-cycle stages for it. | |
| """ | |
| def __init__(self, name="component", owner=None, *args, **kwargs): | |
| object.__init__(self) | |
| self.id = util.gen_token() | |
| self.name = name | |
| self.owner = owner or common.base().APP | |
| self.loaded = False | |
| def load(self, *args, **kwargs): | |
| if self.is_loaded: | |
| return | |
| self._load(*args, **kwargs) | |
| return self | |
| def unload(self, *args, **kwargs): | |
| if not self.is_loaded: | |
| return | |
| self._unload(*args, **kwargs) | |
| return self | |
| def reload(self, *args, **kwargs): | |
| set_state = kwargs.get("set_state", True) | |
| owner = self.owner | |
| state = self.get_state() | |
| if self.is_loaded: | |
| self.unload() | |
| self.owner = owner | |
| self.load() | |
| if set_state: | |
| self.set_state(state) | |
| def get_state(self): | |
| return self._get_state() | |
| def set_state(self, state): | |
| return self._set_state(state) | |
| def logger(self): | |
| if self.owner: | |
| return self.owner.logger | |
| else: | |
| return logging.getLogger() | |
| def is_loaded(self): | |
| return self.loaded | |
| def _load(self, *args, **kwargs): | |
| self.loaded = True | |
| def _unload(self, *args, **kwargs): | |
| self.owner = None | |
| self.loaded = False | |
| def _get_state(self): | |
| return dict(owner=self.owner) | |
| def _set_state(self, state): | |
| self.owner = state.get("owner", None) | |