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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
# Copyright 2018 ke liang <lokyse@163.com>.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
import threading
import io
import os
import traceback
import sys
import functools
from .marker import Marker
from .marker import MARKER_TAG
__all__ = ['patch_loggingMDC', 'MDC']
_replace_func_name = ['info', 'critical', 'fatal', 'debug',
'error', 'warn', 'warning', 'log',
'handle', 'findCaller']
class MDCContext(threading.local):
"""
A Thread local instance to storage mdc values
"""
def __init__(self):
super(MDCContext, self).__init__()
self._localDict = {}
def get(self, key):
return self._localDict.get(key, None)
def put(self, key, value):
self._localDict[key] = value
def remove(self, key):
if key in self._localDict:
del self._localDict[key]
def clear(self):
self._localDict.clear()
def result(self):
return self._localDict
def isEmpty(self):
return self._localDict == {} or self._localDict is None
MDC = MDCContext()
def fetchkeys(func):
@functools.wraps(func)
def replace(*args, **kwargs):
kwargs['extra'] = _getmdcs(extra=kwargs.get('extra', None))
func(*args, **kwargs)
return replace
def _getmdcs(extra=None):
"""
Put mdc dict in logging record extra filed with key 'mdc'
:param extra: dict
:return: mdc dict
"""
if MDC.isEmpty():
return extra
mdc = MDC.result()
if extra is not None:
for key in extra:
# make sure extra key dosen't override mdckey
if key in mdc or key == 'mdc':
raise KeyError("Attempt to overwrite %r in MDC" % key)
else:
extra = {}
extra['mdc'] = mdc
del mdc
return extra
@fetchkeys
def info(self, msg, *args, **kwargs):
if self.isEnabledFor(logging.INFO):
self._log(logging.INFO, msg, args, **kwargs)
@fetchkeys
def debug(self, msg, *args, **kwargs):
if self.isEnabledFor(logging.DEBUG):
self._log(logging.DEBUG, msg, args, **kwargs)
@fetchkeys
def warning(self, msg, *args, **kwargs):
if self.isEnabledFor(logging.WARNING):
self._log(logging.WARNING, msg, args, **kwargs)
@fetchkeys
def exception(self, msg, *args, **kwargs):
kwargs['exc_info'] = 1
self.error(msg, *args, **kwargs)
@fetchkeys
def critical(self, msg, *args, **kwargs):
if self.isEnabledFor(logging.CRITICAL):
self._log(logging.CRITICAL, msg, args, **kwargs)
@fetchkeys
def error(self, msg, *args, **kwargs):
if self.isEnabledFor(logging.ERROR):
self._log(logging.ERROR, msg, args, **kwargs)
@fetchkeys
def log(self, level, msg, *args, **kwargs):
if not isinstance(level, int):
if logging.raiseExceptions:
raise TypeError("level must be an integer")
else:
return
if self.isEnabledFor(level):
self._log(level, msg, args, **kwargs)
def handle(self, record):
cmarker = getattr(self, MARKER_TAG, None)
if isinstance(cmarker, Marker):
setattr(record, MARKER_TAG, cmarker)
if (not self.disabled) and self.filter(record):
self.callHandlers(record)
def findCaller(self, stack_info=False):
f = logging.currentframe()
if f is not None:
f = f.f_back
rv = "(unkown file)", 0, "(unknow function)"
while hasattr(f, "f_code"):
co = f.f_code
filename = os.path.normcase(co.co_filename)
# jump through local 'replace' func frame
if filename == logging._srcfile or co.co_name == "replace":
f = f.f_back
continue
if sys.version_info > (3, 2):
sinfo = None
if stack_info:
sio = io.StringIO()
sio.write("Stack (most recent call last):\n")
traceback.print_stack(f, file=sio)
sinfo = sio.getvalue()
if sinfo[-1] == '\n':
sinfo = sinfo[:-1]
sio.close()
rv = (co.co_filename, f.f_lineno, co.co_name, sinfo)
else:
rv = (co.co_filename, f.f_lineno, co.co_name)
break
return rv
def patch_loggingMDC():
"""
The patch to add MDC ability in logging Record instance at runtime
"""
localModule = sys.modules[__name__]
for attr in dir(logging.Logger):
if attr in _replace_func_name:
newfunc = getattr(localModule, attr, None)
if newfunc:
setattr(logging.Logger, attr, newfunc)
|
