isotopic_logging.InjectionContext.__init__() - Code Metrics - Inspection of "update readme" - oblalex/isotopic-logging - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( e14e5b...be0326 )

by Oleksandr

created 2015-12-10 15:59 UTC

isotopic_logging.InjectionContext.init() B

↳ Parent: isotopic_logging.InjectionContext

Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	10
CRAP Score	5

Metric	Value
cc	5
dl	0
loc	12
ccs	10
cts	10
cp	1
crap	5
rs	8.5455

# -*- 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

    @property
    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:
            if callable(injector):
                injector = injector()

            injector = merge_injectors(_stack.top.injector, injector)
            self._push(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()


1		# -- coding: utf-8 --
2
3	1	from collections import deque, namedtuple
4	1	from threading import local
5
6	1	from .injectors import merge_injectors
7
8
9	1	StackItem = namedtuple('StackItem', ['injector', 'parent', ])
10
11
12	1	class InjectionStack(object):
13
14	1	def __init__(self, local):
15	1	local.stack = deque()
16	1	self._local = local
17
18	1	def push(self, item):
19	1	self._local.stack.append(item)
20
21	1	def pop(self):
22	1	return self._local.stack.pop()
23
24	1	@property
25		def top(self):
26	1	try:
27	1	return self._local.stack[-1]
28		except IndexError:
29		return None
30
31	1	@property
32		def is_empty(self):
33	1	return not self._local.stack
34
35
36	1	_local = local()
37	1	_stack = InjectionStack(_local)
38
39
40	1	class InjectionContext(object):
41
42	1	def __init__(self, injector, inherit=False):
43	1	if _stack.is_empty:
44	1	if callable(injector):
45	1	injector = injector()
46
47	1	self._push(injector)
48	1	elif inherit:
49	1	if callable(injector):
50	1	injector = injector()
51
52	1	injector = merge_injectors(_stack.top.injector, injector)
53	1	self._push(injector)
54
55	1	def _push(self, injector):
56	1	item = StackItem(injector, self)
57	1	_stack.push(item)
58
59	1	def __enter__(self):
60	1	return _stack.top.injector
61
62	1	def __exit__(self, type, value, traceback):
63	1	if _stack.top.parent is self:
64		_stack.pop()
65

oblalex / isotopic-logging

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