Mercurial > libervia-backend
annotate src/core/log_config.py @ 1413:e5393b12dd0f
tmp (mam): fixed name shadowing + getDiscoInfo for mam fix:
getDiscoInfo now only returns MAM namespace when there is no node specified, this avoid having mam everywhere (which was causing issues in SàT PubSub's namespace delegation)
author | Goffi <goffi@goffi.org> |
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date | Fri, 17 Apr 2015 10:39:41 +0200 |
parents | 069ad98b360d |
children | d17772b0fe22 |
rev | line source |
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991 | 1 #!/usr/bin/python |
2 # -*- coding: utf-8 -*- | |
3 | |
4 # SàT: a XMPP client | |
1396 | 5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015 Jérôme Poisson (goffi@goffi.org) |
991 | 6 |
7 # This program is free software: you can redistribute it and/or modify | |
8 # it under the terms of the GNU Affero General Public License as published by | |
9 # the Free Software Foundation, either version 3 of the License, or | |
10 # (at your option) any later version. | |
11 | |
12 # This program is distributed in the hope that it will be useful, | |
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 # GNU Affero General Public License for more details. | |
16 | |
17 # You should have received a copy of the GNU Affero General Public License | |
18 # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | |
20 """High level logging functions""" | |
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21 # XXX: this module use standard logging module when possible, but as SàT can work in different cases where logging is not the best choice (twisted, pyjamas, etc), it is necessary to have a dedicated module. Additional feature like environment variables and colors are also managed. |
991 | 22 |
23 from sat.core.constants import Const as C | |
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24 from sat.core import log |
991 | 25 |
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26 |
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27 class TwistedLogger(log.Logger): |
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28 colors = True |
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29 force_colors = False |
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30 |
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31 def __init__(self, *args, **kwargs): |
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32 super(TwistedLogger, self).__init__(*args, **kwargs) |
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33 from twisted.python import log as twisted_log |
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34 self.twisted_log = twisted_log |
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35 |
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36 def out(self, message, level=None): |
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37 """Actually log the message |
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38 |
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39 @param message: formatted message |
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40 """ |
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41 self.twisted_log.msg(message.encode('utf-8', 'ignore'), sat_logged=True, level=level) |
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42 |
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43 |
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44 class ConfigureBasic(log.ConfigureBase): |
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45 |
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46 def configureColors(self, colors, force_colors): |
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47 if colors: |
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48 import sys |
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49 if force_colors or sys.stdout.isatty(): # FIXME: isatty should be tested on each handler, not globaly |
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50 # we need colors |
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51 log.Logger.post_treat = lambda self, level, message: self.ansiColors(level, message) |
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52 elif force_colors: |
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53 raise ValueError("force_colors can't be used if colors is False") |
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54 |
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55 @staticmethod |
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56 def getProfile(): |
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57 """Try to find profile value using introspection""" |
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58 import inspect |
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59 stack = inspect.stack() |
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60 current_path = stack[0][1] |
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61 for frame_data in stack[:-1]: |
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62 if frame_data[1] != current_path: |
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63 if log.backend == C.LOG_BACKEND_STANDARD and "/logging/__init__.py" in frame_data[1]: |
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64 continue |
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65 break |
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66 |
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67 frame = frame_data[0] |
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68 args = inspect.getargvalues(frame) |
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69 try: |
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70 profile = args.locals.get('profile') or args.locals['profile_key'] |
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71 except (TypeError, KeyError): |
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72 try: |
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73 try: |
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74 profile = args.locals['self'].profile |
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75 except AttributeError: |
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76 try: |
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77 profile = args.locals['self'].parent.profile |
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78 except AttributeError: |
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79 profile = args.locals['self'].host.profile # used in quick_frontend for single profile configuration |
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80 except Exception: |
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81 # we can't find profile, we return an empty value |
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82 profile = '' |
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83 return profile |
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84 |
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85 |
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86 class ConfigureTwisted(ConfigureBasic): |
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87 LOGGER_CLASS = TwistedLogger |
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88 |
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89 def changeObserver(self, observer, can_colors=False): |
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90 """Install a hook on observer to manage SàT specificities |
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91 |
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92 @param observer: original observer to hook |
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93 @param can_colors: True if observer can display ansi colors |
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94 """ |
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95 def observer_hook(event): |
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96 """redirect non SàT log to twisted_logger, and add colors when possible""" |
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97 if 'sat_logged' in event: # we only want our own logs, other are managed by twistedObserver |
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98 # we add colors if possible |
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99 if (can_colors and self.LOGGER_CLASS.colors) or self.LOGGER_CLASS.force_colors: |
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100 message = event.get('message', tuple()) |
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101 level = event.get('level', C.LOG_LVL_INFO) |
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102 if message: |
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103 event['message'] = (self.ansiColors(level, ''.join(message)),) # must be a tuple |
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104 observer(event) # we can now call the original observer |
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105 |
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106 return observer_hook |
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107 |
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108 def changeFileLogObserver(self, observer): |
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109 """Install SàT hook for FileLogObserver |
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110 |
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111 if the output is a tty, we allow colors, else we don't |
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112 @param observer: original observer to hook |
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113 """ |
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114 log_obs = observer.__self__ |
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115 log_file = log_obs.write.__self__ |
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116 try: |
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117 can_colors = log_file.isatty() |
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118 except AttributeError: |
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119 can_colors = False |
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120 return self.changeObserver(observer, can_colors=can_colors) |
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121 |
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122 def installObserverHook(self, observer): |
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123 """Check observer type and install SàT hook when possible |
991 | 124 |
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125 @param observer: observer to hook |
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126 @return: hooked observer or original one |
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127 """ |
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128 if hasattr(observer, '__self__'): |
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129 ori = observer |
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130 if isinstance(observer.__self__, self.twisted_log.FileLogObserver): |
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131 observer = self.changeFileLogObserver(observer) |
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132 elif isinstance(observer.__self__, self.twisted_log.DefaultObserver): |
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133 observer = self.changeObserver(observer, can_colors=True) |
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134 else: |
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135 # we use print because log system is not fully initialized |
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136 print("Unmanaged observer [%s]" % observer) |
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137 return observer |
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138 self.observers[ori] = observer |
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139 return observer |
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141 def preTreatment(self): |
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142 """initialise needed attributes, and install observers hooks""" |
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143 self.observers = {} |
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144 from twisted.python import log as twisted_log |
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145 self.twisted_log = twisted_log |
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146 self.log_publisher = twisted_log.msg.__self__ |
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147 def addObserverObserver(self_logpub, other): |
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148 """Install hook so we know when a new observer is added""" |
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149 other = self.installObserverHook(other) |
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150 return self_logpub._originalAddObserver(other) |
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151 def removeObserverObserver(self_logpub, ori): |
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152 """removeObserver hook fix |
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153 |
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154 As we wrap the original observer, the original removeObserver may want to remove the original object instead of the wrapper, this method fix this |
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155 """ |
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156 if ori in self.observers: |
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157 self_logpub._originalRemoveObserver(self.observers[ori]) |
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158 else: |
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159 try: |
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160 self_logpub._originalRemoveObserver(ori) |
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161 except ValueError: |
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162 try: |
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163 ori in self.cleared_observers |
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164 except AttributeError: |
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165 raise ValueError("Unknown observer") |
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166 |
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167 # we replace addObserver/removeObserver by our own |
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168 twisted_log.LogPublisher._originalAddObserver = twisted_log.LogPublisher.addObserver |
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169 twisted_log.LogPublisher._originalRemoveObserver = twisted_log.LogPublisher.removeObserver |
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170 import types # see https://stackoverflow.com/a/4267590 (thx Chris Morgan/aaronasterling) |
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171 twisted_log.addObserver = types.MethodType(addObserverObserver, self.log_publisher, twisted_log.LogPublisher) |
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172 twisted_log.removeObserver = types.MethodType(removeObserverObserver, self.log_publisher, twisted_log.LogPublisher) |
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173 |
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174 # we now change existing observers |
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175 for idx, observer in enumerate(self.log_publisher.observers): |
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176 self.log_publisher.observers[idx] = self.installObserverHook(observer) |
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177 |
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178 def configureLevel(self, level): |
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179 self.LOGGER_CLASS.level = level |
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180 super(ConfigureTwisted, self).configureLevel(level) |
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181 |
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182 def configureOutput(self, output): |
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183 import sys |
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184 if output is None: |
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185 output = C.LOG_OPT_OUTPUT_SEP + C.LOG_OPT_OUTPUT_DEFAULT |
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186 self.manageOutputs(output) |
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187 addObserver = self.twisted_log.addObserver |
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188 |
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189 if C.LOG_OPT_OUTPUT_DEFAULT in log.handlers: |
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190 # default output is already managed, we just add output to stdout if we are in debug or nodaemon mode |
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191 if self.backend_data is None: |
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192 raise ValueError("You must pass options as backend_data with Twisted backend") |
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193 options = self.backend_data |
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194 if options.get('nodaemon', False) or options.get('debug', False): |
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195 addObserver(self.twisted_log.FileLogObserver(sys.stdout).emit) |
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196 else: |
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197 # \\default is not in the output, so we remove current observers |
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198 self.cleared_observers = self.log_publisher.observers |
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199 self.observers.clear() |
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200 del self.log_publisher.observers[:] |
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201 # and we forbid twistd to add any observer |
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202 self.twisted_log.addObserver = lambda other: None |
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203 |
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204 if C.LOG_OPT_OUTPUT_FILE in log.handlers: |
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205 from twisted.python import logfile |
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206 for path in log.handlers[C.LOG_OPT_OUTPUT_FILE]: |
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207 log_file = sys.stdout if path == '-' else logfile.LogFile.fromFullPath(path) |
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208 addObserver(self.twisted_log.FileLogObserver(log_file).emit) |
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209 |
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210 if C.LOG_OPT_OUTPUT_MEMORY in log.handlers: |
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211 raise NotImplementedError("Memory observer is not implemented in Twisted backend") |
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212 |
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213 def configureColors(self, colors, force_colors): |
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214 self.LOGGER_CLASS.colors = colors |
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215 self.LOGGER_CLASS.force_colors = force_colors |
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216 if force_colors and not colors: |
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217 raise ValueError('colors must be True if force_colors is True') |
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218 |
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219 def postTreatment(self): |
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220 """Install twistedObserver which manage non SàT logs""" |
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221 def twistedObserver(event): |
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222 """Observer which redirect log message not produced by SàT to SàT logging system""" |
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223 if not 'sat_logged' in event: |
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224 # this log was not produced by SàT |
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225 from twisted.python import log as twisted_log |
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226 text = twisted_log.textFromEventDict(event) |
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227 if text is None: |
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228 return |
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229 twisted_logger = log.getLogger(C.LOG_TWISTED_LOGGER) |
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230 log_method = twisted_logger.error if event.get('isError', False) else twisted_logger.info |
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231 log_method(text.decode('utf-8')) |
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232 |
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233 self.log_publisher._originalAddObserver(twistedObserver) |
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234 |
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235 |
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236 class ConfigureStandard(ConfigureBasic): |
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237 |
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238 def __init__(self, level=None, fmt=None, output=None, logger=None, colors=False, force_colors=False, backend_data=None): |
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239 if fmt is None: |
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240 fmt = C.LOG_OPT_FORMAT[1] |
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241 if output is None: |
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242 output = C.LOG_OPT_OUTPUT[1] |
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243 super(ConfigureStandard, self).__init__(level, fmt, output, logger, colors, force_colors, backend_data) |
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245 def preTreatment(self): |
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246 """We use logging methods directly, instead of using Logger""" |
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247 import logging |
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248 log.getLogger = logging.getLogger |
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249 log.debug = logging.debug |
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250 log.info = logging.info |
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251 log.warning = logging.warning |
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252 log.error = logging.error |
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253 log.critical = logging.critical |
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254 |
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255 def configureLevel(self, level): |
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256 if level is None: |
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257 level = C.LOG_LVL_DEBUG |
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258 self.level = level |
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259 |
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260 def configureFormat(self, fmt): |
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261 import logging |
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262 |
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263 class SatFormatter(logging.Formatter): |
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264 u"""Formatter which manage SàT specificities""" |
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265 _format = fmt |
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266 _with_profile = '%(profile)s' in fmt |
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267 |
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268 def __init__(self, can_colors=False): |
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269 super(SatFormatter, self).__init__(self._format) |
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270 self.can_colors = can_colors |
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271 |
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272 def format(self, record): |
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273 if self._with_profile: |
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274 record.profile = ConfigureStandard.getProfile() |
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275 s = super(SatFormatter, self).format(record) |
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276 if self.with_colors and (self.can_colors or self.force_colors): |
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277 s = ConfigureStandard.ansiColors(record.levelname, s) |
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278 return s |
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279 |
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280 self.formatterClass = SatFormatter |
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281 |
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282 def configureOutput(self, output): |
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283 self.manageOutputs(output) |
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284 |
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285 def configureLogger(self, logger): |
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286 self.name_filter = log.FilterName(logger) if logger else None |
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287 |
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288 def configureColors(self, colors, force_colors): |
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289 self.formatterClass.with_colors = colors |
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290 self.formatterClass.force_colors = force_colors |
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291 if not colors and force_colors: |
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292 raise ValueError("force_colors can't be used if colors is False") |
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293 |
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294 def _addHandler(self, root_logger, hdlr, can_colors=False): |
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295 hdlr.setFormatter(self.formatterClass(can_colors)) |
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296 root_logger.addHandler(hdlr) |
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297 root_logger.setLevel(self.level) |
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298 if self.name_filter is not None: |
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299 hdlr.addFilter(self.name_filter) |
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300 |
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301 def postTreatment(self): |
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302 import logging |
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303 root_logger = logging.getLogger() |
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304 if len(root_logger.handlers) == 0: |
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305 for handler, options in log.handlers.items(): |
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306 if handler == C.LOG_OPT_OUTPUT_DEFAULT: |
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307 hdlr = logging.StreamHandler() |
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308 try: |
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309 can_colors = hdlr.stream.isatty() |
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310 except AttributeError: |
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311 can_colors = False |
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312 self._addHandler(root_logger, hdlr, can_colors=can_colors) |
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313 elif handler == C.LOG_OPT_OUTPUT_MEMORY: |
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314 from logging.handlers import BufferingHandler |
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315 class SatMemoryHandler(BufferingHandler): |
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316 def emit(self, record): |
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317 super(SatMemoryHandler, self).emit(self.format(record)) |
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318 hdlr = SatMemoryHandler(options) |
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319 log.handlers[handler] = hdlr # we keep a reference to the handler to read the buffer later |
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320 self._addHandler(root_logger, hdlr, can_colors=False) |
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321 elif handler == C.LOG_OPT_OUTPUT_FILE: |
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322 import os.path |
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323 for path in options: |
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324 hdlr = logging.FileHandler(os.path.expanduser(path)) |
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325 self._addHandler(root_logger, hdlr, can_colors=False) |
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326 else: |
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327 raise ValueError("Unknown handler type") |
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328 else: |
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329 root_logger.warning(u"Handlers already set on root logger") |
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330 |
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331 @staticmethod |
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332 def memoryGet(size=None): |
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333 """Return buffered logs |
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334 |
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335 @param size: number of logs to return |
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336 """ |
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337 mem_handler = log.handlers[C.LOG_OPT_OUTPUT_MEMORY] |
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338 return (log_msg for log_msg in mem_handler.buffer[size if size is None else -size:]) |
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339 |
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340 |
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341 log.configure_cls[C.LOG_BACKEND_BASIC] = ConfigureBasic |
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342 log.configure_cls[C.LOG_BACKEND_TWISTED] = ConfigureTwisted |
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343 log.configure_cls[C.LOG_BACKEND_STANDARD] = ConfigureStandard |
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344 |
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345 def configure(backend, **options): |
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346 """Configure logging behaviour |
991 | 347 @param backend: can be: |
348 C.LOG_BACKEND_STANDARD: use standard logging module | |
349 C.LOG_BACKEND_TWISTED: use twisted logging module (with standard logging observer) | |
350 C.LOG_BACKEND_BASIC: use a basic print based logging | |
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351 C.LOG_BACKEND_CUSTOM: use a given Logger subclass |
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353 return log.configure(backend, **options) |
991 | 354 |
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355 def _parseOptions(options): |
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356 """Parse string options as given in conf or environment variable, and return expected python value |
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357 |
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358 @param options (dict): options with (key: name, value: string value) |
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359 """ |
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360 COLORS = C.LOG_OPT_COLORS[0] |
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361 LEVEL = C.LOG_OPT_LEVEL[0] |
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362 |
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363 if COLORS in options: |
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364 if options[COLORS].lower() in ('1', 'true'): |
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365 options[COLORS] = True |
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366 elif options[COLORS] == 'force': |
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367 options[COLORS] = True |
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368 options['force_colors'] = True |
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369 else: |
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370 options[COLORS] = False |
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371 if LEVEL in options: |
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372 level = options[LEVEL].upper() |
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373 if level not in C.LOG_LEVELS: |
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374 level = C.LOG_LVL_INFO |
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375 options[LEVEL] = level |
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376 |
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377 def satConfigure(backend=C.LOG_BACKEND_STANDARD, const=None, backend_data=None): |
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378 """Configure logging system for SàT, can be used by frontends |
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379 |
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380 logs conf is read in SàT conf, then in environment variables. It must be done before Memory init |
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381 @param backend: backend to use, it can be: |
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382 - C.LOG_BACKEND_BASIC: print based backend |
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383 - C.LOG_BACKEND_TWISTED: Twisted logging backend |
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384 - C.LOG_BACKEND_STANDARD: standard logging backend |
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385 @param const: Const class to use instead of sat.core.constants.Const (mainly used to change default values) |
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386 """ |
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387 if const is not None: |
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388 global C |
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389 C = const |
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390 log.C = const |
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391 import ConfigParser |
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392 import os |
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393 log_conf = {} |
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394 config = ConfigParser.SafeConfigParser() |
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395 config.read(C.CONFIG_FILES) |
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396 for opt_name, opt_default in C.LOG_OPTIONS(): |
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397 try: |
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398 log_conf[opt_name] = os.environ[''.join((C.ENV_PREFIX, C.LOG_OPT_PREFIX.upper(), opt_name.upper()))] |
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399 except KeyError: |
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400 try: |
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401 log_conf[opt_name] = config.get(C.LOG_OPT_SECTION, C.LOG_OPT_PREFIX + opt_name) |
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402 except (ConfigParser.NoOptionError, ConfigParser.NoSectionError): |
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403 log_conf[opt_name] = opt_default |
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404 |
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405 _parseOptions(log_conf) |
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406 configure(backend, backend_data=backend_data, **log_conf) |