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
|
# Copyright (C) 2007 Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
"""Logging service setup.
STABLE.
"""
import array
import collections
import errno
import logging
import sys
import os
import repr as repr_
# simpoir: commented as it breaks with python version we use
#import decorator
# Let's keep this module self contained so that it can be easily
# pasted in external sugar service like the datastore.
# traces function calls, use SUGAR_LOGGER_LEVEL=trace to enable
TRACE = 5
logging.addLevelName(TRACE, 'TRACE')
def get_logs_dir():
profile = os.environ.get('SUGAR_PROFILE', 'default')
logs_dir = os.environ.get('SUGAR_LOGS_DIR',
os.path.join(os.path.expanduser('~'),
'.sugar', profile, 'logs'))
return logs_dir
_LEVELS = { 'error' : logging.ERROR,
'warning' : logging.WARNING,
'debug' : logging.DEBUG,
'info' : logging.INFO,
'trace' : TRACE,
'all' : 0,
}
def set_level(level):
if level in _LEVELS:
logging.getLogger('').setLevel(_LEVELS[level])
return
try:
logging.getLogger('').setLevel(int(level))
except ValueError:
logging.warning('Invalid log level: %r' % level)
# pylint: disable-msg=E1101,F0401
def _except_hook(exctype, value, traceback):
# Attempt to provide verbose IPython tracebacks.
# Importing IPython is slow, so we import it lazily.
try:
from IPython.ultraTB import AutoFormattedTB
sys.excepthook = AutoFormattedTB(mode='Verbose', color_scheme='NoColor')
except ImportError:
sys.excepthook = sys.__excepthook__
sys.excepthook(exctype, value, traceback)
def start(log_filename=None):
# remove existing handlers, or logging.basicConfig() won't have no effect.
root_logger = logging.getLogger('')
for handler in root_logger.handlers:
root_logger.removeHandler(handler)
class SafeLogWrapper(object):
"""Small file-like wrapper to gracefully handle ENOSPC errors when
logging."""
def __init__(self, stream):
self._stream = stream
def write(self, s):
try:
self._stream.write(s)
except IOError, e:
# gracefully deal w/ disk full
if e.errno != errno.ENOSPC:
raise e
def flush(self):
try:
self._stream.flush()
except IOError, e:
# gracefully deal w/ disk full
if e.errno != errno.ENOSPC:
raise e
logging.basicConfig(level=logging.WARNING,
format="%(created)f %(levelname)s %(name)s: %(message)s",
stream=SafeLogWrapper(sys.stderr))
if os.environ.has_key('SUGAR_LOGGER_LEVEL'):
set_level(os.environ['SUGAR_LOGGER_LEVEL'])
if log_filename:
try:
log_path = os.path.join(get_logs_dir(), log_filename + '.log')
log_fd = os.open(log_path, os.O_WRONLY | os.O_CREAT)
os.dup2(log_fd, sys.stdout.fileno())
os.dup2(log_fd, sys.stderr.fileno())
os.close(log_fd)
sys.stdout = SafeLogWrapper(sys.stdout)
sys.stderr = SafeLogWrapper(sys.stderr)
except OSError, e:
# if we're out of space, just continue
if e.errno != errno.ENOSPC:
raise e
sys.excepthook = _except_hook
class TraceRepr(repr_.Repr):
# better handling of subclasses of basic types, e.g. for DBus
_TYPES = [int, long, bool, tuple, list, array.array, set, frozenset,
collections.deque, dict, str]
def repr1(self, x, level):
for t in self._TYPES:
if isinstance(x, t):
return getattr(self, 'repr_'+t.__name__)(x, level)
return repr_.Repr.repr1(self, x, level)
def repr_int(self, x, level):
return repr(x)
def repr_bool(self, x, level):
return repr(x)
def trace(logger=None, logger_name=None, skip_args=None, skip_kwargs=None,
maxsize_list=30, maxsize_dict=30, maxsize_string=300):
if skip_args is None:
skip_args = []
if skip_kwargs is None:
skip_kwargs = []
# size-limit repr()
trace_repr = TraceRepr()
trace_repr.maxlist = maxsize_list
trace_repr.maxdict = maxsize_dict
trace_repr.maxstring = maxsize_string
trace_repr.maxother = maxsize_string
trace_logger = logger or logging.getLogger(logger_name)
def _trace(f, *args, **kwargs):
# don't do expensive formatting if loglevel TRACE is not enabled
enabled = trace_logger.isEnabledFor(TRACE)
logging.debug('logger.trace: mec %r' % enabled)
if enabled:
params_formatted = ", ".join(
[trace_repr.repr(a)
for (idx, a) in enumerate(args) if idx not in skip_args] + \
['%s=%s' % (k,trace_repr.repr(v))
for (k,v) in kwargs.items() if k not in skip_kwargs])
trace_logger.log(TRACE, "%s(%s) invoked", f.__name__,
params_formatted)
try:
res = f(*args, **kwargs)
except:
trace_logger.exception("Exception occured in %s", f.__name__)
raise
if enabled:
trace_logger.log(TRACE, "%s(%s) returned %s", f.__name__,
params_formatted, trace_repr.repr(res))
return res
return decorator.decorator(_trace)
|
