for testing and deploying your application
for finding and fixing issues
for empowering human code reviews
# -*- coding: utf-8 -*-
from collections import deque, namedtuple
from threading import local
from .injectors import merge_injectors
StackItem = namedtuple('StackItem', ['injector', 'parent', ])
class InjectionStack(object):
def __init__(self, local):
local.stack = deque()
self._local = local
def push(self, item):
self._local.stack.append(item)
def pop(self):
return self._local.stack.pop()
@property
def top(self):
try:
return self._local.stack[-1]
except IndexError:
return None
def is_empty(self):
return not self._local.stack
_local = local()
_stack = InjectionStack(_local)
class InjectionContext(object):
def __init__(self, injector, inherit=False):
if _stack.is_empty:
if callable(injector):
injector = injector()
self._push(injector)
elif inherit:
injector = merge_injectors(_stack.top.injector, injector)
def _push(self, injector):
item = StackItem(injector, self)
_stack.push(item)
def __enter__(self):
return _stack.top.injector
def __exit__(self, type, value, traceback):
if _stack.top.parent is self:
_stack.pop()
oblalex /
isotopic-logging
