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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)
@property
def logger(self):
if self.owner:
return self.owner.logger
else:
return logging.getLogger()
@property
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)
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