Current File : //usr/lib/python2.7/site-packages/salt/utils/ctx.py
# -*- coding: utf-8 -*-
# Import python libs
from __future__ import absolute_import, with_statement, print_function, unicode_literals
import threading
class ClassProperty(property):
'''
Use a classmethod as a property
http://stackoverflow.com/a/1383402/1258307
'''
def __get__(self, cls, owner):
return self.fget.__get__(None, owner)() # pylint: disable=no-member
class RequestContext(object):
'''
A context manager that saves some per-thread state globally.
Intended for use with Tornado's StackContext.
https://gist.github.com/simon-weber/7755289
Simply import this class into any module and access the current request handler by this
class's class method property 'current'. If it returns None, there's no active request.
.. code:: python
from raas.utils.ctx import RequestContext
current_request_handler = RequestContext.current
'''
_state = threading.local()
_state.current_request = {}
def __init__(self, current_request):
self._current_request = current_request
@ClassProperty
@classmethod
def current(cls):
if not hasattr(cls._state, 'current_request'):
return {}
return cls._state.current_request
def __enter__(self):
self._prev_request = self.__class__.current
self.__class__._state.current_request = self._current_request
def __exit__(self, *exc):
self.__class__._state.current_request = self._prev_request
del self._prev_request
return False
def __call__(self):
return self
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