123 lines
3.2 KiB
Python
123 lines
3.2 KiB
Python
import functools
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import importlib
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import logging
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import signal
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import time
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from platypush.config import Config
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from platypush.message import Message
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modules = {}
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def get_or_load_plugin(plugin_name, reload=False):
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global modules
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if plugin_name in modules and not reload:
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return modules[plugin_name]
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try:
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module = importlib.import_module('platypush.plugins.' + plugin_name)
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except ModuleNotFoundError as e:
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logging.warning('No such plugin: {}'.format(plugin_name))
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raise RuntimeError(e)
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# e.g. plugins.music.mpd main class: MusicMpdPlugin
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cls_name = functools.reduce(
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lambda a,b: a.title() + b.title(),
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(plugin_name.title().split('.'))
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) + 'Plugin'
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plugin_conf = Config.get_plugins()[plugin_name] \
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if plugin_name in Config.get_plugins() else {}
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try:
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plugin_class = getattr(module, cls_name)
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plugin = plugin_class(**plugin_conf)
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modules[plugin_name] = plugin
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except AttributeError as e:
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logging.warning('No such class in {}: {}'.format(
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plugin_name, cls_name))
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raise RuntimeError(e)
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return plugin
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def init_backends(bus=None):
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backends = {}
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for k in Config.get_backends().keys():
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module = importlib.import_module('platypush.backend.' + k)
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cfg = Config.get_backends()[k]
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# e.g. backend.pushbullet main class: PushbulletBackend
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cls_name = functools.reduce(
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lambda a,b: a.title() + b.title(),
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(module.__name__.title().split('.')[2:])
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) + 'Backend'
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try:
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b = getattr(module, cls_name)(bus=bus, **cfg)
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backends[k] = b
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except AttributeError as e:
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logging.warning('No such class in {}: {}'.format(
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module.__name__, cls_name))
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raise RuntimeError(e)
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return backends
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def get_module_and_name_from_action(action):
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""" Input : action=music.mpd.play
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Output : ('music.mpd', 'play') """
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tokens = action.split('.')
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module_name = str.join('.', tokens[:-1])
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method_name = tokens[-1:][0]
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return (module_name, method_name)
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def get_message_class_by_type(msgtype):
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""" Gets the class of a message type given as string """
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try:
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module = importlib.import_module('platypush.message.' + msgtype)
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except ModuleNotFoundError as e:
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logging.warning('Unsupported message type {}'.format(msgtype))
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raise RuntimeError(e)
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cls_name = msgtype[0].upper() + msgtype[1:]
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try:
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msgclass = getattr(module, cls_name)
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except AttributeError as e:
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logging.warning('No such class in {}: {}'.format(
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module.__name__, cls_name))
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raise RuntimeError(e)
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return msgclass
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def set_timeout(seconds, on_timeout):
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"""
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Set a function to be called if timeout expires without being cleared.
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It only works on the main thread.
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Params:
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seconds -- Timeout in seconds
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on_timeout -- Function invoked on timeout unless clear_timeout is called before
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"""
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def _sighandler(signum, frame):
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on_timeout()
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signal.signal(signal.SIGALRM, _sighandler)
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signal.alarm(seconds)
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def clear_timeout():
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""" Clear any previously set timeout """
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signal.alarm(0)
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# vim:sw=4:ts=4:et:
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