77 lines
2.6 KiB
Python
77 lines
2.6 KiB
Python
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#
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# Copyright (C) 2019 Red Hat, Inc. All rights reserved.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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from dasbus.namespace import get_namespace_from_name, get_dbus_path, get_dbus_name
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from dasbus.client.observer import DBusObserver, DBusObserverError
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from pyanaconda.anaconda_loggers import get_module_logger
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from pyanaconda.modules.common.constants.namespaces import ADDONS_NAMESPACE
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log = get_module_logger(__name__)
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class ModuleObserver(DBusObserver):
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"""Observer of an Anaconda module."""
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def __init__(self, message_bus, service_name):
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"""Creates a module observer.
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:param message_bus: a message bus
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:param service_name: a DBus name of a service
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"""
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super().__init__(message_bus, service_name)
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self._proxy = None
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self._is_addon = service_name.startswith(get_dbus_name(*ADDONS_NAMESPACE))
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self._namespace = get_namespace_from_name(service_name)
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self._object_path = get_dbus_path(*self._namespace)
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@property
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def is_addon(self):
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"""Is the observed module an addon?
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:return: True or False
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"""
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return self._is_addon
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@property
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def proxy(self):
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"""Returns a proxy of the remote object."""
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if not self._is_service_available:
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raise DBusObserverError("Service {} is not available."
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.format(self._service_name))
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if not self._proxy:
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self._proxy = self._message_bus.get_proxy(self._service_name,
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self._object_path)
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return self._proxy
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def _enable_service(self):
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"""Enable the service."""
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self._proxy = None
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super()._enable_service()
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def _disable_service(self):
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"""Disable the service"""
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self._proxy = None
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super()._disable_service()
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def __repr__(self):
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"""Returns a string representation."""
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return "{}({},{})".format(self.__class__.__name__,
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self._service_name,
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self._object_path)
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