Mercurial > libervia-backend
annotate src/core/log.py @ 1166:6b15a6d184d5
misc (README4PACKAGERS): Urwid minimal version is now 1.2.0
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Thu, 04 Sep 2014 20:34:38 +0200 |
| parents | 08f50fdac21b |
| children | 069ad98b360d |
| rev | line source |
|---|---|
| 991 | 1 #!/usr/bin/python |
| 2 # -*- coding: utf-8 -*- | |
| 3 | |
| 4 # SàT: a XMPP client | |
| 5 # Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Jérôme Poisson (goffi@goffi.org) | |
| 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 | |
| 24 from sat.core import exceptions | |
| 25 | |
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26 backend = None |
| 991 | 27 _loggers = {} |
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28 handlers = {} |
| 991 | 29 |
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30 |
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31 class Filtered(Exception): |
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32 pass |
| 991 | 33 |
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34 |
| 991 | 35 class Logger(object): |
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36 """High level logging class""" |
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37 fmt = None # format option as given by user (e.g. SAT_LOG_LOGGER) |
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38 filter_name = None # filter to call |
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39 post_treat = None |
| 991 | 40 |
| 41 def __init__(self, name): | |
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42 if isinstance(name, Logger): |
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43 self.copy(name) |
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44 else: |
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45 self._name = name |
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46 |
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47 def copy(self, other): |
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48 """Copy values from other Logger""" |
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49 self.fmt = other.fmt |
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50 self.Filter_name = other.fmt |
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51 self.post_treat = other.post_treat |
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52 self._name = other._name |
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53 |
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54 def out(self, message, level=None): |
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55 """Actually log the message |
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56 |
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57 @param message: formatted message |
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58 """ |
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59 print message |
| 991 | 60 |
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61 def log(self, level, message): |
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62 """Print message |
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63 |
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64 @param level: one of C.LOG_LEVELS |
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65 @param message: message to format and print |
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66 """ |
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67 try: |
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68 formatted = self.format(level, message) |
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69 if self.post_treat is None: |
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70 self.out(formatted, level) |
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71 else: |
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72 self.out(self.post_treat(level, formatted), level) |
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73 except Filtered: |
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74 pass |
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75 |
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76 def format(self, level, message): |
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77 """Format message according to Logger.fmt |
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78 |
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79 @param level: one of C.LOG_LEVELS |
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80 @param message: message to format |
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81 @return: formatted message |
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82 |
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83 @raise: Filtered when the message must not be logged |
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84 """ |
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85 if self.fmt is None and self.filter_name is None: |
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86 return message |
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87 record = {'name': self._name, |
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88 'message': message, |
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89 'levelname': level, |
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90 } |
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91 try: |
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92 if not self.filter_name.dictFilter(record): |
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93 raise Filtered |
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94 except (AttributeError, TypeError): # XXX: TypeError is here because of a pyjamas bug which need to be fixed (TypeError is raised instead of AttributeError) |
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95 if self.filter_name is not None: |
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96 raise ValueError("Bad filter: filters must have a .filter method") |
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97 try: |
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98 return self.fmt % record |
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99 except TypeError: |
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100 return message |
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101 except KeyError as e: |
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102 if e.args[0] == 'profile': |
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103 # XXX: %(profile)s use some magic with introspection, for debugging purpose only *DO NOT* use in production |
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104 record['profile'] = configure_cls[backend].getProfile() |
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105 return self.fmt % record |
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106 else: |
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107 raise e |
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108 |
| 991 | 109 def debug(self, msg): |
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110 self.log(C.LOG_LVL_DEBUG, msg) |
| 991 | 111 |
| 112 def info(self, msg): | |
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113 self.log(C.LOG_LVL_INFO, msg) |
| 991 | 114 |
| 115 def warning(self, msg): | |
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116 self.log(C.LOG_LVL_WARNING, msg) |
| 991 | 117 |
| 118 def error(self, msg): | |
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119 self.log(C.LOG_LVL_ERROR, msg) |
| 991 | 120 |
| 121 def critical(self, msg): | |
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122 self.log(C.LOG_LVL_CRITICAL, msg) |
| 991 | 123 |
| 124 | |
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125 class FilterName(object): |
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126 """Filter on logger name according to a regex""" |
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127 |
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128 def __init__(self, name_re): |
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129 """Initialise name filter |
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130 |
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131 @param name_re: regular expression used to filter names (using search and not match) |
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132 """ |
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133 assert name_re |
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134 import re |
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135 self.name_re = re.compile(name_re) |
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136 |
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137 def filter(self, record): |
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138 if self.name_re.search(record.name) is not None: |
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139 return 1 |
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140 return 0 |
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141 |
|
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142 def dictFilter(self, dict_record): |
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143 """Filter using a dictionary record |
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144 |
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145 @param dict_record: dictionary with at list a key "name" with logger name |
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146 @return: True if message should be logged |
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147 """ |
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148 class LogRecord(object): |
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149 pass |
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150 log_record = LogRecord() |
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151 log_record.name = dict_record['name'] |
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152 return self.filter(log_record) == 1 |
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153 |
|
1010
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primitivus: use of new logging system:
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154 |
|
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155 class ConfigureBase(object): |
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156 LOGGER_CLASS = Logger |
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157 |
|
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158 def __init__(self, level=None, fmt=None, output=None, logger=None, colors=False, force_colors=False, backend_data=None): |
|
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159 """Configure a backend |
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160 |
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161 @param level: one of C.LOG_LEVELS |
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162 @param fmt: format string, pretty much as in std logging. Accept the following keywords (maybe more depending on backend): |
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163 - "message" |
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164 - "levelname" |
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165 - "name" (logger name) |
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166 @param logger: if set, use it as a regular expression to filter on logger name. |
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167 Use search to match expression, so ^ or $ can be necessary. |
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168 @param colors: if True use ANSI colors to show log levels |
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169 @param force_colors: if True ANSI colors are used even if stdout is not a tty |
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170 """ |
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171 self.backend_data = backend_data |
|
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172 self.preTreatment() |
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173 self.configureLevel(level) |
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174 self.configureFormat(fmt) |
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175 self.configureOutput(output) |
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176 self.configureLogger(logger) |
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177 self.configureColors(colors, force_colors) |
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178 self.postTreatment() |
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179 self.updateCurrentLogger() |
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180 |
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181 def updateCurrentLogger(self): |
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182 """update existing logger to the class needed for this backend""" |
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183 if self.LOGGER_CLASS is None: |
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184 return |
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185 for name, logger in _loggers.items(): |
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186 _loggers[name] = self.LOGGER_CLASS(logger) |
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187 |
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188 def preTreatment(self): |
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189 pass |
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190 |
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191 def configureLevel(self, level): |
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192 if level is not None: |
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193 # we deactivate methods below level |
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194 level_idx = C.LOG_LEVELS.index(level) |
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195 def dev_null(self, msg): |
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196 pass |
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197 for _level in C.LOG_LEVELS[:level_idx]: |
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198 setattr(Logger, _level.lower(), dev_null) |
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199 |
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200 def configureFormat(self, fmt): |
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201 if fmt is not None: |
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202 if fmt != '%(message)s': # %(message)s is the same as None |
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203 Logger.fmt = fmt |
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204 |
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205 def configureOutput(self, output): |
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206 if output is not None: |
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207 if output != C.LOG_OPT_OUTPUT_SEP + C.LOG_OPT_OUTPUT_DEFAULT: |
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208 # TODO: manage other outputs |
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209 raise NotImplementedError("Basic backend only manage default output yet") |
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210 |
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211 def configureLogger(self, logger): |
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212 if logger: |
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213 Logger.filter_name = FilterName(logger) |
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diff
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|
214 |
|
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215 def configureColors(self, colors, force_colors): |
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a836b6da2c5c
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216 pass |
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core (log): moved configuration to core.log_config; this avoid import issues with pyjamas.
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217 |
|
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218 def postTreatment(self): |
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219 pass |
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220 |
|
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221 def manageOutputs(self, outputs_raw): |
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222 """ Parse output option in a backend agnostic way, and fill handlers consequently |
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223 |
|
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224 @param outputs_raw: output option as enterred in environment variable or in configuration |
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225 """ |
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226 if not outputs_raw: |
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227 return |
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228 outputs = outputs_raw.split(C.LOG_OPT_OUTPUT_SEP) |
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229 global handlers |
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230 if len(outputs) == 1: |
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core (log): moved configuration to core.log_config; this avoid import issues with pyjamas.
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231 handlers[C.LOG_OPT_OUTPUT_FILE] = [outputs.pop()] |
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core (log): moved configuration to core.log_config; this avoid import issues with pyjamas.
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|
232 |
|
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|
233 for output in outputs: |
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234 if not output: |
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core (log): moved configuration to core.log_config; this avoid import issues with pyjamas.
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|
235 continue |
|
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236 if output[-1] == ')': |
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|
237 # we have options |
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|
238 opt_begin = output.rfind('(') |
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|
239 options = output[opt_begin+1:-1] |
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|
240 output = output[:opt_begin] |
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|
241 else: |
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|
242 options = None |
|
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|
243 |
|
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|
244 if output not in (C.LOG_OPT_OUTPUT_DEFAULT, C.LOG_OPT_OUTPUT_FILE, C.LOG_OPT_OUTPUT_MEMORY): |
|
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core (log): moved configuration to core.log_config; this avoid import issues with pyjamas.
Goffi <goffi@goffi.org>
parents:
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245 raise ValueError(u"Invalid output [%s]" % output) |
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246 |
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247 if output == C.LOG_OPT_OUTPUT_DEFAULT: |
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248 # no option for defaut handler |
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249 handlers[output] = None |
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250 elif output == C.LOG_OPT_OUTPUT_FILE: |
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251 if not options: |
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252 ValueError("%(handler)s output need a path as option" % {'handler': output}) |
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253 handlers.setdefault(output, []).append(options) |
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254 options = None # option are parsed, we can empty them |
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255 elif output == C.LOG_OPT_OUTPUT_MEMORY: |
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256 # we have memory handler, option can be the len limit or None |
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257 try: |
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258 limit = int(options) |
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259 options = None # option are parsed, we can empty them |
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260 except (TypeError, ValueError): |
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261 limit = C.LOG_OPT_OUTPUT_MEMORY_LIMIT |
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262 handlers[output] = limit |
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263 |
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264 if options: # we should not have unparsed options |
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265 raise ValueError(u"options [%(options)s] are not supported for %(handler)s output" % {'options': options, 'handler': output}) |
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266 |
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267 @staticmethod |
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268 def memoryGet(size=None): |
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269 """Return buffered logs |
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270 |
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271 @param size: number of logs to return |
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272 """ |
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273 raise NotImplementedError |
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274 |
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275 @staticmethod |
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276 def ansiColors(level, message): |
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277 """Colorise message depending on level for terminals |
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278 |
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279 @param level: one of C.LOG_LEVELS |
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280 @param message: formatted message to log |
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281 @return: message with ANSI escape codes for coloration |
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282 """ |
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283 if level == C.LOG_LVL_DEBUG: |
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284 out = (C.ANSI_FG_CYAN, message, C.ANSI_RESET) |
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285 elif level == C.LOG_LVL_WARNING: |
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286 out = (C.ANSI_FG_YELLOW, message, C.ANSI_RESET) |
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287 elif level == C.LOG_LVL_ERROR: |
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288 out = (C.ANSI_FG_RED, |
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289 C.ANSI_BLINK, |
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290 r'/!\ ', |
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291 C.ANSI_BLINK_OFF, |
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292 message, |
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293 C.ANSI_RESET) |
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294 elif level == C.LOG_LVL_CRITICAL: |
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295 out = (C.ANSI_BOLD, |
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296 C.ANSI_FG_RED, |
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297 'Guru Meditation ', |
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298 C.ANSI_NORMAL_WEIGHT, |
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299 message, |
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300 C.ANSI_RESET) |
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301 else: |
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302 out = message |
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303 return ''.join(out) |
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304 |
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305 @staticmethod |
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306 def getProfile(): |
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307 """Try to find profile value using introspection""" |
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308 raise NotImplementedError |
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309 |
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310 |
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311 class ConfigureCustom(ConfigureBase): |
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312 LOGGER_CLASS = None |
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313 |
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314 def __init__(self, logger_class, *args, **kwargs): |
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315 ConfigureCustom.LOGGER_CLASS = logger_class |
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316 |
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317 |
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318 configure_cls = { None: ConfigureBase, |
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319 C.LOG_BACKEND_CUSTOM: ConfigureCustom |
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320 } # XXX: (key: backend, value: Configure subclass) must be filled when new backend are added |
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321 |
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322 |
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323 def configure(backend_, **options): |
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324 """Configure logging behaviour |
| 991 | 325 @param backend: can be: |
| 326 C.LOG_BACKEND_BASIC: use a basic print based logging | |
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327 C.LOG_BACKEND_CUSTOM: use a given Logger subclass |
| 991 | 328 """ |
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329 global backend |
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330 if backend is not None: |
| 991 | 331 raise exceptions.InternalError("Logging can only be configured once") |
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332 backend = backend_ |
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333 |
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334 try: |
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335 configure_class = configure_cls[backend] |
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336 except KeyError: |
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337 raise ValueError("unknown backend [%s]" % backend) |
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338 if backend == C.LOG_BACKEND_CUSTOM: |
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339 logger_class = options.pop('logger_class') |
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340 configure_class(logger_class, **options) |
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341 else: |
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342 configure_class(**options) |
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343 |
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344 def memoryGet(size=None): |
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345 if not C.LOG_OPT_OUTPUT_MEMORY in handlers: |
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346 raise ValueError('memory output is not used') |
|
a836b6da2c5c
core (log): moved configuration to core.log_config; this avoid import issues with pyjamas.
Goffi <goffi@goffi.org>
parents:
1017
diff
changeset
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347 return configure_cls[backend].memoryGet(size) |
| 991 | 348 |
| 349 def getLogger(name=C.LOG_BASE_LOGGER): | |
|
1021
a836b6da2c5c
core (log): moved configuration to core.log_config; this avoid import issues with pyjamas.
Goffi <goffi@goffi.org>
parents:
1017
diff
changeset
|
350 try: |
|
a836b6da2c5c
core (log): moved configuration to core.log_config; this avoid import issues with pyjamas.
Goffi <goffi@goffi.org>
parents:
1017
diff
changeset
|
351 logger_class = configure_cls[backend].LOGGER_CLASS |
|
a836b6da2c5c
core (log): moved configuration to core.log_config; this avoid import issues with pyjamas.
Goffi <goffi@goffi.org>
parents:
1017
diff
changeset
|
352 except KeyError: |
|
a836b6da2c5c
core (log): moved configuration to core.log_config; this avoid import issues with pyjamas.
Goffi <goffi@goffi.org>
parents:
1017
diff
changeset
|
353 raise ValueError("This method should not be called with backend [%s]" % backend) |
|
1007
a7d33c7a8277
core (log): refactoring + twisted backend:
Goffi <goffi@goffi.org>
parents:
1006
diff
changeset
|
354 return _loggers.setdefault(name, logger_class(name)) |
| 991 | 355 |
| 356 _root_logger = getLogger() | |
| 357 | |
| 358 def debug(msg): | |
| 359 _root_logger.debug(msg) | |
| 360 | |
| 361 def info(msg): | |
| 362 _root_logger.info(msg) | |
| 363 | |
| 364 def warning(msg): | |
| 365 _root_logger.warning(msg) | |
| 366 | |
| 367 def error(msg): | |
| 368 _root_logger.error(msg) | |
| 369 | |
| 370 def critical(msg): | |
| 371 _root_logger.critical(msg) |