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python3.6
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tuned
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files >> //proc/self/root/usr/lib/python3.6/site-packages/tuned/exports/dbus_exporter_with_properties.py
from inspect import ismethod from dbus.service import method, signal from dbus import PROPERTIES_IFACE from dbus.exceptions import DBusException from tuned.exports.dbus_exporter import DBusExporter class DBusExporterWithProperties(DBusExporter): def __init__(self, bus_name, interface_name, object_name, namespace): super(DBusExporterWithProperties, self).__init__(bus_name, interface_name, object_name, namespace) self._property_setters = {} self._property_getters = {} def Get(_, interface_name, property_name): if interface_name != self._interface_name: raise DBusException("Unknown interface: %s" % interface_name) if property_name not in self._property_getters: raise DBusException("No such property: %s" % property_name) getter = self._property_getters[property_name] return getter() def Set(_, interface_name, property_name, value): if interface_name != self._interface_name: raise DBusException("Unknown interface: %s" % interface_name) if property_name not in self._property_setters: raise DBusException("No such property: %s" % property_name) setter = self._property_setters[property_name] setter(value) def GetAll(_, interface_name): if interface_name != self._interface_name: raise DBusException("Unknown interface: %s" % interface_name) return {name: getter() for name, getter in self._property_getters.items()} def PropertiesChanged(_, interface_name, changed_properties, invalidated_properties): if interface_name != self._interface_name: raise DBusException("Unknown interface: %s" % interface_name) self._dbus_methods["Get"] = method(PROPERTIES_IFACE, in_signature="ss", out_signature="v")(Get) self._dbus_methods["Set"] = method(PROPERTIES_IFACE, in_signature="ssv")(Set) self._dbus_methods["GetAll"] = method(PROPERTIES_IFACE, in_signature="s", out_signature="a{sv}")(GetAll) self._dbus_methods["PropertiesChanged"] = signal(PROPERTIES_IFACE, signature="sa{sv}as")(PropertiesChanged) self._signals.add("PropertiesChanged") def property_changed(self, property_name, value): self.send_signal("PropertiesChanged", self._interface_name, {property_name: value}, {}) def property_getter(self, method, property_name): if not ismethod(method): raise Exception("Only bound methods can be exported.") if property_name in self._property_getters: raise Exception("A getter for this property is already registered.") self._property_getters[property_name] = method def property_setter(self, method, property_name): if not ismethod(method): raise Exception("Only bound methods can be exported.") if property_name in self._property_setters: raise Exception("A setter for this property is already registered.") self._property_setters[property_name] = method
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