1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
"""
Null Backend
-------------
The Null backend does not do any caching at all. It can be
used to test behavior without caching, or as a means of disabling
caching for a region that is otherwise used normally.
.. versionadded:: 0.5.4
"""
from ..api import CacheBackend
from ..api import NO_VALUE
__all__ = ["NullBackend"]
class NullLock(object):
def acquire(self, wait=True):
return True
def release(self):
pass
def locked(self):
return False
class NullBackend(CacheBackend):
"""A "null" backend that effectively disables all cache operations.
Basic usage::
from dogpile.cache import make_region
region = make_region().configure(
'dogpile.cache.null'
)
"""
def __init__(self, arguments):
pass
def get_mutex(self, key):
return NullLock()
def get(self, key):
return NO_VALUE
def get_multi(self, keys):
return [NO_VALUE for k in keys]
def set(self, key, value):
pass
def set_multi(self, mapping):
pass
def delete(self, key):
pass
def delete_multi(self, keys):
pass
|
