Mercurial > hg > orthanc

annotate Core/Logging.cpp @ 2062:40ffd0e8676a

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generation of etag in ServeFolders
author Sebastien Jodogne <s.jodogne@gmail.com>
date Sat, 02 Jul 2016 15:09:03 +0200
parents bcc575732aef
children ddc75c6c712d
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #include "PrecompiledHeaders.h"
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34 #include "Logging.h"
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35
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36 #if ORTHANC_ENABLE_LOGGING != 1
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37
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38 namespace Orthanc
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39 {
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40 namespace Logging
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41 {
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42 void Initialize()
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43 {
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44 }
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45
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46 void Finalize()
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47 {
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48 }
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49
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50 void Reset()
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51 {
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52 }
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53
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54 void Flush()
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55 {
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56 }
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57
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58 void EnableInfoLevel(bool enabled)
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59 {
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60 }
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61
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62 void EnableTraceLevel(bool enabled)
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63 {
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64 }
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65
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66 void SetTargetFile(const std::string& path)
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67 {
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68 }
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69
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70 void SetTargetFolder(const std::string& path)
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71 {
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72 }
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73 }
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74 }
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75
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76 #else
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77
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78 /*********************************************************
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79 * Internal logger of Orthanc, that mimics some
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80 * behavior from Google Log.
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81 *********************************************************/
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82
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83 #include "OrthancException.h"
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84 #include "Enumerations.h"
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85 #include "Toolbox.h"
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86
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87 #include <fstream>
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88 #include <boost/filesystem.hpp>
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89 #include <boost/thread.hpp>
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90
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91 #if BOOST_HAS_DATE_TIME == 1
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92 # include <boost/date_time/posix_time/posix_time.hpp>
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93 #else
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94 # error Boost::date_time is required
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95 #endif
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96
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97
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98 namespace
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99 {
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100 struct LoggingContext
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101 {
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102 bool infoEnabled_;
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103 bool traceEnabled_;
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104 std::string targetFile_;
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105 std::string targetFolder_;
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106
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107 std::ostream* error_;
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108 std::ostream* warning_;
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109 std::ostream* info_;
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110
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111 std::auto_ptr<std::ofstream> file_;
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112
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113 LoggingContext() :
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114 infoEnabled_(false),
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115 traceEnabled_(false),
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116 error_(&std::cerr),
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117 warning_(&std::cerr),
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118 info_(&std::cerr)
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119 {
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120 }
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121 };
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122 }
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123
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124
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125
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126 static std::auto_ptr<LoggingContext> loggingContext_;
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127 static boost::mutex loggingMutex_;
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128
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129
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130
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131 namespace Orthanc
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132 {
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133 namespace Logging
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134 {
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135 static void GetLogPath(boost::filesystem::path& log,
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136 boost::filesystem::path& link,
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137 const std::string& suffix,
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138 const std::string& directory)
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139 {
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140 /**
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141 From Google Log documentation:
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142
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143 Unless otherwise specified, logs will be written to the filename
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144 "<program name>.<hostname>.<user name>.log<suffix>.",
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145 followed by the date, time, and pid (you can't prevent the date,
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146 time, and pid from being in the filename).
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147
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148 In this implementation : "hostname" and "username" are not used
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149 **/
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150
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151 boost::posix_time::ptime now = boost::posix_time::second_clock::local_time();
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152 boost::filesystem::path root(directory);
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153 boost::filesystem::path exe(Toolbox::GetPathToExecutable());
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154
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155 if (!boost::filesystem::exists(root) ||
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156 !boost::filesystem::is_directory(root))
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157 {
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158 throw OrthancException(ErrorCode_CannotWriteFile);
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159 }
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160
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161 char date[64];
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162 sprintf(date, "%04d%02d%02d-%02d%02d%02d.%d",
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163 static_cast<int>(now.date().year()),
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164 now.date().month().as_number(),
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165 now.date().day().as_number(),
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166 now.time_of_day().hours(),
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167 now.time_of_day().minutes(),
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168 now.time_of_day().seconds(),
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169 Toolbox::GetProcessId());
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170
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171 std::string programName = exe.filename().replace_extension("").string();
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172
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173 log = (root / (programName + ".log" + suffix + "." + std::string(date)));
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174 link = (root / (programName + ".log" + suffix));
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175 }
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176
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177
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178 static void PrepareLogFolder(std::auto_ptr<std::ofstream>& file,
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179 const std::string& suffix,
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180 const std::string& directory)
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181 {
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182 boost::filesystem::path log, link;
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183 GetLogPath(log, link, suffix, directory);
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184
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185 #if !defined(_WIN32) && (defined(__unix__) || defined(__unix) || (defined(__APPLE__) && defined(__MACH__)))
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186 boost::filesystem::remove(link);
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187 boost::filesystem::create_symlink(log.filename(), link);
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188 #endif
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189
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190 file.reset(new std::ofstream(log.string().c_str()));
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191 }
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192
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193
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194 void Initialize()
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195 {
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196 boost::mutex::scoped_lock lock(loggingMutex_);
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197 loggingContext_.reset(new LoggingContext);
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198 }
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199
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200 void Finalize()
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201 {
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202 boost::mutex::scoped_lock lock(loggingMutex_);
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203 loggingContext_.reset(NULL);
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204 }
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205
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206 void Reset()
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207 {
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208 // Recover the old logging context
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209 std::auto_ptr<LoggingContext> old;
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210
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211 {
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212 boost::mutex::scoped_lock lock(loggingMutex_);
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213 if (loggingContext_.get() == NULL)
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214 {
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215 return;
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216 }
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217 else
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218 {
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219 old = loggingContext_;
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220
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221 // Create a new logging context,
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222 loggingContext_.reset(new LoggingContext);
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223 }
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224 }
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225
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226 EnableInfoLevel(old->infoEnabled_);
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227 EnableTraceLevel(old->traceEnabled_);
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228
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229 if (!old->targetFolder_.empty())
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230 {
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231 SetTargetFolder(old->targetFolder_);
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232 }
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233 else if (!old->targetFile_.empty())
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234 {
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235 SetTargetFile(old->targetFile_);
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236 }
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237 }
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238
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239 void EnableInfoLevel(bool enabled)
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240 {
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241 boost::mutex::scoped_lock lock(loggingMutex_);
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242 assert(loggingContext_.get() != NULL);
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243
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244 loggingContext_->infoEnabled_ = enabled;
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245
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246 if (!enabled)
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247 {
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248 // Also disable the "TRACE" level when info-level debugging is disabled
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249 loggingContext_->traceEnabled_ = false;
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250 }
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251 }
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252
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253 void EnableTraceLevel(bool enabled)
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254 {
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255 boost::mutex::scoped_lock lock(loggingMutex_);
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256 assert(loggingContext_.get() != NULL);
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257
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258 loggingContext_->traceEnabled_ = enabled;
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259
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260 if (enabled)
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261 {
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262 // Also enable the "INFO" level when trace-level debugging is enabled
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263 loggingContext_->infoEnabled_ = true;
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264 }
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265 }
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266
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267
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268 static void CheckFile(std::auto_ptr<std::ofstream>& f)
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269 {
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270 if (loggingContext_->file_.get() == NULL ||
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271 !loggingContext_->file_->is_open())
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272 {
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273 throw OrthancException(ErrorCode_CannotWriteFile);
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274 }
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275 }
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276
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277 void SetTargetFolder(const std::string& path)
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278 {
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279 boost::mutex::scoped_lock lock(loggingMutex_);
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280 assert(loggingContext_.get() != NULL);
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281
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282 PrepareLogFolder(loggingContext_->file_, "" /* no suffix */, path);
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283 CheckFile(loggingContext_->file_);
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284
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285 loggingContext_->targetFile_.clear();
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286 loggingContext_->targetFolder_ = path;
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287 loggingContext_->warning_ = loggingContext_->file_.get();
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288 loggingContext_->error_ = loggingContext_->file_.get();
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289 loggingContext_->info_ = loggingContext_->file_.get();
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290 }
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291
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292
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293 void SetTargetFile(const std::string& path)
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294 {
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295 boost::mutex::scoped_lock lock(loggingMutex_);
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296 assert(loggingContext_.get() != NULL);
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297
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298 loggingContext_->file_.reset(new std::ofstream(path.c_str(), std::fstream::app));
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299 CheckFile(loggingContext_->file_);
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300
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301 loggingContext_->targetFile_ = path;
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302 loggingContext_->targetFolder_.clear();
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303 loggingContext_->warning_ = loggingContext_->file_.get();
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304 loggingContext_->error_ = loggingContext_->file_.get();
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305 loggingContext_->info_ = loggingContext_->file_.get();
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306 }
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307
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308
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309 InternalLogger::InternalLogger(const char* level,
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310 const char* file,
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311 int line) :
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312 lock_(loggingMutex_),
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313 stream_(&null_) // By default, logging to "/dev/null" is simulated
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314 {
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315 if (loggingContext_.get() == NULL)
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316 {
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317 fprintf(stderr, "ERROR: Trying to log a message after the finalization of the logging engine\n");
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318 return;
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319 }
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320
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321 LogLevel l = StringToLogLevel(level);
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322
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323 if ((l == LogLevel_Info && !loggingContext_->infoEnabled_) ||
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324 (l == LogLevel_Trace && !loggingContext_->traceEnabled_))
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325 {
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326 // This logging level is disabled, directly exit and unlock
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327 // the mutex to speed-up things. The stream is set to "/dev/null"
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328 lock_.unlock();
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329 return;
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330 }
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331
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332 // Compute the header of the line, temporary release the lock as
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333 // this is a time-consuming operation
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334 lock_.unlock();
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335 std::string header;
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336
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337 {
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338 boost::filesystem::path path(file);
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339 boost::posix_time::ptime now = boost::posix_time::microsec_clock::local_time();
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340 boost::posix_time::time_duration duration = now.time_of_day();
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341
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342 /**
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343 From Google Log documentation:
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344
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345 "Log lines have this form:
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346
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347 Lmmdd hh:mm:ss.uuuuuu threadid file:line] msg...
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348
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349 where the fields are defined as follows:
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350
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351 L A single character, representing the log level (eg 'I' for INFO)
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352 mm The month (zero padded; ie May is '05')
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353 dd The day (zero padded)
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354 hh:mm:ss.uuuuuu Time in hours, minutes and fractional seconds
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355 threadid The space-padded thread ID as returned by GetTID() (this matches the PID on Linux)
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356 file The file name
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357 line The line number
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358 msg The user-supplied message"
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359
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360 In this implementation, "threadid" is not printed.
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361 **/
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362
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diff changeset
363 char date[32];
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364 sprintf(date, "%c%02d%02d %02d:%02d:%02d.%06d ",
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diff changeset
365 level[0],
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366 now.date().month().as_number(),
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diff changeset
367 now.date().day().as_number(),
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diff changeset
368 duration.hours(),
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diff changeset
369 duration.minutes(),
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370 duration.seconds(),
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371 static_cast<int>(duration.fractional_seconds()));
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diff changeset
372
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373 header = std::string(date) + path.filename().string() + ":" + boost::lexical_cast<std::string>(line) + "] ";
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374 }
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375
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376
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377 // The header is computed, we now re-lock the mutex to access
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378 // the stream objects. Pay attention that "loggingContext_",
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379 // "infoEnabled_" or "traceEnabled_" might have changed while
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380 // the mutex was unlocked.
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diff changeset
381 lock_.lock();
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diff changeset
382
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diff changeset
383 if (loggingContext_.get() == NULL)
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diff changeset
384 {
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385 fprintf(stderr, "ERROR: Trying to log a message after the finalization of the logging engine\n");
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386 return;
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387 }
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388
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diff changeset
389 switch (l)
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390 {
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391 case LogLevel_Error:
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diff changeset
392 stream_ = loggingContext_->error_;
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393 break;
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394
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395 case LogLevel_Warning:
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396 stream_ = loggingContext_->warning_;
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397 break;
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398
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399 case LogLevel_Info:
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400 if (loggingContext_->infoEnabled_)
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401 {
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diff changeset
402 stream_ = loggingContext_->info_;
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403 }
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diff changeset
404
fbe40117eb21 improve the performance of the internal logger
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diff changeset
405 break;
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406
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diff changeset
407 case LogLevel_Trace:
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diff changeset
408 if (loggingContext_->traceEnabled_)
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409 {
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410 stream_ = loggingContext_->info_;
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411 }
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412
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413 break;
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414
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415 default:
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416 throw OrthancException(ErrorCode_InternalError);
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417 }
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418
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419 if (stream_ == &null_)
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420 {
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421 // The logging is disabled for this level. The stream is the
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422 // "null_" member of this object, so we can release the global
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423 // mutex.
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424 lock_.unlock();
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425 }
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426
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427 (*stream_) << header;
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428 }
1507
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429
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430
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431 InternalLogger::~InternalLogger()
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432 {
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433 if (stream_ != &null_)
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434 {
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435 #if defined(_WIN32)
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436 *stream_ << "\r\n";
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437 #else
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438 *stream_ << "\n";
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439 #endif
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440
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441 stream_->flush();
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442 }
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443 }
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444
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445
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446 void Flush()
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447 {
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448 boost::mutex::scoped_lock lock(loggingMutex_);
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449
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450 if (loggingContext_.get() != NULL &&
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451 loggingContext_->file_.get() != NULL)
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452 {
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453 loggingContext_->file_->flush();
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454 }
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455 }
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456 }
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457 }
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458
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459 #endif // ORTHANC_ENABLE_LOGGING