root / kamaki / cli / logger.py @ 9dc6159f
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1 | 42115b51 | Stavros Sachtouris | # Copyright 2013 GRNET S.A. All rights reserved.
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2 | 42115b51 | Stavros Sachtouris | #
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3 | 42115b51 | Stavros Sachtouris | # Redistribution and use in source and binary forms, with or
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4 | 42115b51 | Stavros Sachtouris | # without modification, are permitted provided that the following
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5 | 42115b51 | Stavros Sachtouris | # conditions are met:
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6 | 42115b51 | Stavros Sachtouris | #
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7 | 42115b51 | Stavros Sachtouris | # 1. Redistributions of source code must retain the above
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8 | 42115b51 | Stavros Sachtouris | # copyright notice, this list of conditions and the following
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9 | 42115b51 | Stavros Sachtouris | # disclaimer.
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10 | 42115b51 | Stavros Sachtouris | #
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11 | 42115b51 | Stavros Sachtouris | # 2. Redistributions in binary form must reproduce the above
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12 | 42115b51 | Stavros Sachtouris | # copyright notice, this list of conditions and the following
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13 | 42115b51 | Stavros Sachtouris | # disclaimer in the documentation and/or other materials
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14 | 42115b51 | Stavros Sachtouris | # provided with the distribution.
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15 | 42115b51 | Stavros Sachtouris | #
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16 | 42115b51 | Stavros Sachtouris | # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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17 | 42115b51 | Stavros Sachtouris | # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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18 | 42115b51 | Stavros Sachtouris | # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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19 | 42115b51 | Stavros Sachtouris | # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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20 | 42115b51 | Stavros Sachtouris | # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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21 | 42115b51 | Stavros Sachtouris | # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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22 | 42115b51 | Stavros Sachtouris | # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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23 | 42115b51 | Stavros Sachtouris | # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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24 | 42115b51 | Stavros Sachtouris | # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | 42115b51 | Stavros Sachtouris | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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26 | 42115b51 | Stavros Sachtouris | # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 | 42115b51 | Stavros Sachtouris | # POSSIBILITY OF SUCH DAMAGE.
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28 | 42115b51 | Stavros Sachtouris | #
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29 | 42115b51 | Stavros Sachtouris | # The views and conclusions contained in the software and
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30 | 42115b51 | Stavros Sachtouris | # documentation are those of the authors and should not be
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31 | 42115b51 | Stavros Sachtouris | # interpreted as representing official policies, either expressed
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32 | 42115b51 | Stavros Sachtouris | # or implied, of GRNET S.A.
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33 | 42115b51 | Stavros Sachtouris | |
34 | edf00ab3 | Stavros Sachtouris | from os import chmod |
35 | 9e87e4bb | Stavros Sachtouris | from os.path import expanduser |
36 | 42115b51 | Stavros Sachtouris | import logging |
37 | 42115b51 | Stavros Sachtouris | |
38 | 42115b51 | Stavros Sachtouris | |
39 | 9e87e4bb | Stavros Sachtouris | LOG_FILE = [expanduser('~/.kamaki.log')]
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40 | 9dc724e5 | Stavros Sachtouris | ALL = 0
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41 | 9dc724e5 | Stavros Sachtouris | |
42 | 9dc724e5 | Stavros Sachtouris | _blacklist = {} |
43 | 9dc724e5 | Stavros Sachtouris | |
44 | 9dc724e5 | Stavros Sachtouris | |
45 | d761839f | Stavros Sachtouris | def deactivate(name): |
46 | 9dc724e5 | Stavros Sachtouris | """Deactivate a logger. Can be restored"""
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47 | 9dc724e5 | Stavros Sachtouris | xlogger = logging.getLogger(name) |
48 | 9dc724e5 | Stavros Sachtouris | _blacklist[name] = xlogger.level |
49 | 9dc724e5 | Stavros Sachtouris | xlogger.setLevel(logging.CRITICAL) |
50 | 9dc724e5 | Stavros Sachtouris | |
51 | 9dc724e5 | Stavros Sachtouris | |
52 | 9dc724e5 | Stavros Sachtouris | def activate(name): |
53 | 9dc724e5 | Stavros Sachtouris | """Restore a loggers settings"""
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54 | 9dc724e5 | Stavros Sachtouris | old_logger = logging.getLogger(name) |
55 | 9dc724e5 | Stavros Sachtouris | old_logger.setLevel(_blacklist.pop(name, old_logger.level)) |
56 | 9dc724e5 | Stavros Sachtouris | |
57 | 9dc724e5 | Stavros Sachtouris | |
58 | 9dc724e5 | Stavros Sachtouris | def if_logger_enabled(foo): |
59 | 9dc724e5 | Stavros Sachtouris | def wrap(name, *args, **kwargs): |
60 | 9dc724e5 | Stavros Sachtouris | if name in _blacklist: |
61 | 9dc724e5 | Stavros Sachtouris | return logging.getLogger(name)
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62 | 9dc724e5 | Stavros Sachtouris | return foo(name, *args, **kwargs)
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63 | 9dc724e5 | Stavros Sachtouris | return wrap
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64 | f47417e7 | Stavros Sachtouris | |
65 | f47417e7 | Stavros Sachtouris | |
66 | f47417e7 | Stavros Sachtouris | def get_log_filename(): |
67 | f47417e7 | Stavros Sachtouris | for logfile in LOG_FILE: |
68 | 42115b51 | Stavros Sachtouris | try:
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69 | 31a30991 | Stavros Sachtouris | with open(logfile, 'a+') as f: |
70 | 42115b51 | Stavros Sachtouris | f.seek(0)
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71 | edf00ab3 | Stavros Sachtouris | chmod(logfile, 0600)
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72 | 42115b51 | Stavros Sachtouris | except IOError: |
73 | 42115b51 | Stavros Sachtouris | continue
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74 | 42115b51 | Stavros Sachtouris | return logfile
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75 | 42115b51 | Stavros Sachtouris | print('Failed to open any logging locations, file-logging aborted')
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76 | 42115b51 | Stavros Sachtouris | |
77 | 42115b51 | Stavros Sachtouris | |
78 | f47417e7 | Stavros Sachtouris | def set_log_filename(filename): |
79 | f47417e7 | Stavros Sachtouris | global LOG_FILE
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80 | 9dc724e5 | Stavros Sachtouris | LOG_FILE[0] = filename
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81 | f47417e7 | Stavros Sachtouris | |
82 | f47417e7 | Stavros Sachtouris | |
83 | e9db8806 | Stavros Sachtouris | def _add_logger(name, level=None, filename=None, fmt=None): |
84 | 9986e569 | Stavros Sachtouris | log = get_logger(name) |
85 | e9db8806 | Stavros Sachtouris | h = logging.FileHandler(filename) if (
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86 | 9986e569 | Stavros Sachtouris | filename) else logging.StreamHandler()
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87 | 9986e569 | Stavros Sachtouris | lfmt = logging.Formatter(fmt or '%(name)s\n %(message)s') |
88 | 9986e569 | Stavros Sachtouris | h.setFormatter(lfmt) |
89 | e9db8806 | Stavros Sachtouris | log.addHandler(h) |
90 | e9db8806 | Stavros Sachtouris | log.setLevel(level or logging.DEBUG)
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91 | c4563114 | Stavros Sachtouris | return log
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92 | e9db8806 | Stavros Sachtouris | |
93 | e9db8806 | Stavros Sachtouris | |
94 | 9dc724e5 | Stavros Sachtouris | @if_logger_enabled
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95 | a5077876 | Stavros Sachtouris | def add_file_logger(name, level=None, filename=None): |
96 | e9db8806 | Stavros Sachtouris | try:
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97 | e9db8806 | Stavros Sachtouris | return _add_logger(
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98 | e9db8806 | Stavros Sachtouris | name, level, filename or get_log_filename(),
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99 | e9db8806 | Stavros Sachtouris | fmt='%(name)s(%(levelname)s) %(asctime)s\n\t%(message)s')
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100 | e9db8806 | Stavros Sachtouris | except Exception: |
101 | e9db8806 | Stavros Sachtouris | return get_logger(name)
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102 | e9db8806 | Stavros Sachtouris | |
103 | e9db8806 | Stavros Sachtouris | |
104 | 9dc724e5 | Stavros Sachtouris | @if_logger_enabled
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105 | 6e1f863b | Stavros Sachtouris | def add_stream_logger(name, level=None, fmt=None): |
106 | 42115b51 | Stavros Sachtouris | try:
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107 | 6e1f863b | Stavros Sachtouris | return _add_logger(name, level, fmt=fmt)
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108 | 42115b51 | Stavros Sachtouris | except Exception: |
109 | e9db8806 | Stavros Sachtouris | return get_logger(name)
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110 | 42115b51 | Stavros Sachtouris | |
111 | 42115b51 | Stavros Sachtouris | |
112 | 9dc724e5 | Stavros Sachtouris | @if_logger_enabled
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113 | 42115b51 | Stavros Sachtouris | def get_logger(name): |
114 | 42115b51 | Stavros Sachtouris | return logging.getLogger(name) |