File: cache.py

package info (click to toggle)
electrum 4.0.9-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 35,248 kB
  • sloc: python: 222,785; sh: 165; java: 73; javascript: 10; makefile: 9
file content (39 lines) | stat: -rw-r--r-- 805 bytes parent folder | download | duplicates (9)
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
"""
The cache object API for implementing caches. The default is a thread
safe in-memory dictionary.
"""
from threading import Lock


class BaseCache(object):

    def get(self, key):
        raise NotImplementedError()

    def set(self, key, value):
        raise NotImplementedError()

    def delete(self, key):
        raise NotImplementedError()

    def close(self):
        pass


class DictCache(BaseCache):

    def __init__(self, init_dict=None):
        self.lock = Lock()
        self.data = init_dict or {}

    def get(self, key):
        return self.data.get(key, None)

    def set(self, key, value):
        with self.lock:
            self.data.update({key: value})

    def delete(self, key):
        with self.lock:
            if key in self.data:
                self.data.pop(key)