name : dbus_controller.py import dbus import dbus.exceptions import time from dbus.mainloop.glib import DBusGMainLoop from gi.repository import GLib, GObject from .exceptions import TunedAdminDBusException __all__ = ["DBusController"] class DBusController(object): def __init__(self, bus_name, interface_name, object_name, debug = False): self._bus_name = bus_name self._interface_name = interface_name self._object_name = object_name self._proxy = None self._interface = None self._debug = debug self._main_loop = None self._action = None self._on_exit_action = None self._ret = True self._exit = False self._exception = None def _init_proxy(self): try: if self._proxy is None: DBusGMainLoop(set_as_default=True) self._main_loop = GLib.MainLoop() bus = dbus.SystemBus() self._proxy = bus.get_object(self._bus_name, self._object_name) self._interface = dbus.Interface(self._proxy, dbus_interface = self._interface_name) except dbus.exceptions.DBusException: raise TunedAdminDBusException("Cannot talk to TuneD daemon via DBus. Is TuneD daemon running?") def _idle(self): if self._action is not None: # This may (and very probably will) run in child thread, so catch and pass exceptions to the main thread try: self._action_exit_code = self._action(*self._action_args, **self._action_kwargs) except TunedAdminDBusException as e: self._exception = e self._exit = True if self._exit: if self._on_exit_action is not None: self._on_exit_action(*self._on_exit_action_args, **self._on_exit_action_kwargs) self._main_loop.quit() return False else: time.sleep(1) return True def set_on_exit_action(self, action, *args, **kwargs): self._on_exit_action = action self._on_exit_action_args = args self._on_exit_action_kwargs = kwargs def set_action(self, action, *args, **kwargs): self._action = action self._action_args = args self._action_kwargs = kwargs def run(self): self._exception = None GLib.idle_add(self._idle) self._main_loop.run() # Pass exception happened in child thread to the caller if self._exception is not None: raise self._exception return self._ret def _call(self, method_name, *args, **kwargs): self._init_proxy() try: method = self._interface.get_dbus_method(method_name) return method(*args, timeout=40) except dbus.exceptions.DBusException as dbus_exception: err_str = "DBus call to TuneD daemon failed" if self._debug: err_str += " (%s)" % str(dbus_exception) raise TunedAdminDBusException(err_str) def set_signal_handler(self, signal, cb): self._init_proxy() self._proxy.connect_to_signal(signal, cb) def is_running(self): return self._call("is_running") def start(self): return self._call("start") def stop(self): return self._call("stop") def profiles(self): return self._call("profiles") def profiles2(self): return self._call("profiles2") def profile_info(self, profile_name): return self._call("profile_info", profile_name) def log_capture_start(self, log_level, timeout): return self._call("log_capture_start", log_level, timeout) def log_capture_finish(self, token): return self._call("log_capture_finish", token) def active_profile(self): return self._call("active_profile") def profile_mode(self): return self._call("profile_mode") def post_loaded_profile(self): return self._call("post_loaded_profile") def switch_profile(self, new_profile): if new_profile == "": return (False, "No profile specified") return self._call("switch_profile", new_profile) def auto_profile(self): return self._call("auto_profile") def recommend_profile(self): return self._call("recommend_profile") def verify_profile(self): return self._call("verify_profile") def verify_profile_ignore_missing(self): return self._call("verify_profile_ignore_missing") def off(self): return self._call("disable") def get_plugins(self): """Return dict with plugin names and their hints Return: dictionary -- {plugin_name: {parameter_name: default_value}} """ return self._call("get_all_plugins") def get_plugin_documentation(self, plugin_name): """Return docstring of plugin's class""" return self._call("get_plugin_documentation", plugin_name) def get_plugin_hints(self, plugin_name): """Return dictionary with parameters of plugin and their hints Parameters: plugin_name -- name of plugin Return: dictionary -- {parameter_name: hint} """ return self._call("get_plugin_hints", plugin_name) def instance_acquire_devices(self, devices, instance): return self._call("instance_acquire_devices", devices, instance) def get_instances(self, plugin_name): return self._call("get_instances", plugin_name) def instance_get_devices(self, instance): return self._call("instance_get_devices", instance) def exit(self, ret): self.set_action(None) self._ret = ret self._exit = True return ret