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
|
#!/usr/bin/env python3
#
# Copyright (c) 2016 Jon Turney
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
import logging
from logging.handlers import BufferingHandler
# Loosely based on the "Buffering logging messages and outputting them
# conditionally" example from the python logging cookbook.
#
# AbeyanceHandler holds log output in a BufferingHandler. When closed, it will
# pass all log output of retainLevel or higher to the callback.
class AbeyanceHandler(BufferingHandler):
def __init__(self, callback, retainLevel):
BufferingHandler.__init__(self, capacity=0)
self.callback = callback
self.setLevel(retainLevel)
def shouldFlush(self, record):
# the capacity we pass to BufferingHandler is irrelevant since we
# override shouldFlush so it never indicates we have reached capacity
return False
def close(self):
# allow the callback to process the buffer
self.callback(self)
# discard the buffers contents
super().close()
def __enter__(self):
logging.getLogger().addHandler(self)
return self
def __exit__(self, exception_type, exception_value, traceback):
self.close()
logging.getLogger().removeHandler(self)
# process any exception in the with-block normally
return False
|
