晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Directory :  /usr/lib/python3.6/site-packages/tuned/exports/

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Current File : //usr/lib/python3.6/site-packages/tuned/exports/controller.py
from . import interfaces
import inspect
import tuned.patterns

class ExportsController(tuned.patterns.Singleton):
	"""
	Controls and manages object interface exporting.
	"""

	def __init__(self):
		super(ExportsController, self).__init__()
		self._exporters = []
		self._objects = []
		self._exports_initialized = False

	def register_exporter(self, instance):
		"""Register objects exporter."""
		self._exporters.append(instance)

	def register_object(self, instance):
		"""Register object to be exported."""
		self._objects.append(instance)

	def _is_exportable_method(self, method):
		"""Check if method was marked with @exports.export wrapper."""
		return inspect.ismethod(method) and hasattr(method, "export_params")

	def _is_exportable_signal(self, method):
		"""Check if method was marked with @exports.signal wrapper."""
		return inspect.ismethod(method) and hasattr(method, "signal_params")

	def _is_exportable_getter(self, method):
		"""Check if method was marked with @exports.get_property wrapper."""
		return inspect.ismethod(method) and hasattr(method, "property_get_params")

	def _is_exportable_setter(self, method):
		"""Check if method was marked with @exports.set_property wrapper."""
		return inspect.ismethod(method) and hasattr(method, "property_set_params")

	def _export_method(self, method):
		"""Register method to all exporters."""
		for exporter in self._exporters:
			args = method.export_params[0]
			kwargs = method.export_params[1]
			exporter.export(method, *args, **kwargs)

	def _export_signal(self, method):
		"""Register signal to all exporters."""
		for exporter in self._exporters:
			args = method.signal_params[0]
			kwargs = method.signal_params[1]
			exporter.signal(method, *args, **kwargs)

	def _export_getter(self, method):
		"""Register property getter to all exporters."""
		for exporter in self._exporters:
			args = method.property_get_params[0]
			kwargs = method.property_get_params[1]
			exporter.property_getter(method, *args, **kwargs)

	def _export_setter(self, method):
		"""Register property setter to all exporters."""
		for exporter in self._exporters:
			args = method.property_set_params[0]
			kwargs = method.property_set_params[1]
			exporter.property_setter(method, *args, **kwargs)

	def send_signal(self, signal, *args, **kwargs):
		"""Register signal to all exporters."""
		for exporter in self._exporters:
			exporter.send_signal(signal, *args, **kwargs)

	def property_changed(self, *args, **kwargs):
		for exporter in self._exporters:
			exporter.property_changed(*args, **kwargs)

	def period_check(self):
		"""Allows to perform checks on exporters without special thread."""
		for exporter in self._exporters:
			exporter.period_check()

	def _initialize_exports(self):
		if self._exports_initialized:
			return

		for instance in self._objects:
			for name, method in inspect.getmembers(instance, self._is_exportable_method):
				self._export_method(method)
			for name, method in inspect.getmembers(instance, self._is_exportable_signal):
				self._export_signal(method)
			for name, method in inspect.getmembers(instance, self._is_exportable_getter):
				self._export_getter(method)
			for name, method in inspect.getmembers(instance, self._is_exportable_setter):
				self._export_setter(method)

		self._exports_initialized = True

	def start(self):
		"""Start the exports."""
		self._initialize_exports()
		for exporter in self._exporters:
			exporter.start()

	def stop(self):
		"""Stop the exports."""
		for exporter in self._exporters:
			exporter.stop()

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