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annotate Core/Logging.h @ 4006:55710d73780f

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reorganizing Logging.cpp
author Sebastien Jodogne <s.jodogne@gmail.com>
date Sat, 06 Jun 2020 11:21:39 +0200
parents 7f9909062d9c
children f0ee3f1db775
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
1900
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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 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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33
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34 #pragma once
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35
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36 // To have ORTHANC_ENABLE_LOGGING defined if using the shared library
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37 #include "OrthancFramework.h"
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38
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39 #include <iostream>
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40
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41 #if !defined(ORTHANC_ENABLE_LOGGING)
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42 # error The macro ORTHANC_ENABLE_LOGGING must be defined
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43 #endif
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44
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45 #if !defined(ORTHANC_ENABLE_LOGGING_PLUGIN)
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46 # if ORTHANC_ENABLE_LOGGING == 1
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47 # error The macro ORTHANC_ENABLE_LOGGING_PLUGIN must be defined
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48 # else
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49 # define ORTHANC_ENABLE_LOGGING_PLUGIN 0
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50 # endif
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51 #endif
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52
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53 #if !defined(ORTHANC_ENABLE_LOGGING_STDIO)
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54 # if ORTHANC_ENABLE_LOGGING == 1
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55 # error The macro ORTHANC_ENABLE_LOGGING_STDIO must be defined
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56 # else
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57 # define ORTHANC_ENABLE_LOGGING_STDIO 0
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58 # endif
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59 #endif
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60
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61 #include <boost/lexical_cast.hpp>
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62
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63 namespace Orthanc
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64 {
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65 namespace Logging
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66 {
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67 enum LogLevel
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68 {
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69 LogLevel_ERROR,
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70 LogLevel_WARNING,
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71 LogLevel_INFO,
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72 LogLevel_TRACE
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73 };
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74
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75 ORTHANC_PUBLIC const char* EnumerationToString(LogLevel level);
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76
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77 ORTHANC_PUBLIC LogLevel StringToLogLevel(const char* level);
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78
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79 #if ORTHANC_ENABLE_LOGGING_PLUGIN == 1
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80 // "pluginContext" must be of type "OrthancPluginContext"
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81 ORTHANC_PUBLIC void Initialize(void* pluginContext);
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82 #else
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83 ORTHANC_PUBLIC void Initialize();
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84 #endif
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85
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86 ORTHANC_PUBLIC void Finalize();
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87
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88 ORTHANC_PUBLIC void Reset();
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90 ORTHANC_PUBLIC void Flush();
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92 ORTHANC_PUBLIC void EnableInfoLevel(bool enabled);
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93
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94 ORTHANC_PUBLIC void EnableTraceLevel(bool enabled);
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95
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96 ORTHANC_PUBLIC bool IsTraceLevelEnabled();
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97
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98 ORTHANC_PUBLIC bool IsInfoLevelEnabled();
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99
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100 ORTHANC_PUBLIC void SetTargetFile(const std::string& path);
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101
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102 ORTHANC_PUBLIC void SetTargetFolder(const std::string& path);
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103
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104 #if ORTHANC_ENABLE_LOGGING_STDIO == 1
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105 typedef void (*LoggingFunction)(const char*);
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106 ORTHANC_PUBLIC void SetErrorWarnInfoTraceLoggingFunctions(LoggingFunction errorLogFunc,
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107 LoggingFunction warningLogfunc,
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108 LoggingFunction infoLogFunc,
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109 LoggingFunction traceLogFunc);
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110 #endif
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111
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112 struct NullStream : public std::ostream
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113 {
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114 NullStream() :
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115 std::ios(0),
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116 std::ostream(0)
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117 {
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118 }
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119
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120 template <typename T>
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121 std::ostream& operator<< (const T& message)
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122 {
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123 return *this;
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124 }
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125 };
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126 }
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127 }
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128
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129
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130 #if ORTHANC_ENABLE_LOGGING != 1
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131 # define LOG(level) ::Orthanc::Logging::NullStream()
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132 # define VLOG(level) ::Orthanc::Logging::NullStream()
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133 #else
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134 # define LOG(level) ::Orthanc::Logging::InternalLogger \
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135 (::Orthanc::Logging::LogLevel_ ## level, __FILE__, __LINE__)
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136 # define VLOG(level) ::Orthanc::Logging::InternalLogger \
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137 (::Orthanc::Logging::LogLevel_TRACE, __FILE__, __LINE__)
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138 #endif
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139
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140
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141 #if (ORTHANC_ENABLE_LOGGING == 1 && \
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142 (ORTHANC_ENABLE_LOGGING_PLUGIN == 1 || \
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143 ORTHANC_ENABLE_LOGGING_STDIO == 1))
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144
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145 #include <boost/noncopyable.hpp>
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146
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147 namespace Orthanc
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148 {
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149 namespace Logging
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150 {
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151 class ORTHANC_PUBLIC InternalLogger : public boost::noncopyable
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152 {
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153 private:
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154 LogLevel level_;
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155 std::stringstream messageStream_;
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156
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157 public:
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158 InternalLogger(LogLevel level,
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159 const char* file,
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160 int line);
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161
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162 ~InternalLogger();
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163
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164 template <typename T>
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165 std::ostream& operator<< (const T& message)
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166 {
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167 messageStream_ << message;
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168 return messageStream_;
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169 }
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170 };
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171 }
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172 }
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173
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174 #endif
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175
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176
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177
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178
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179 #if (ORTHANC_ENABLE_LOGGING == 1 && \
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180 ORTHANC_ENABLE_LOGGING_PLUGIN == 0 && \
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181 ORTHANC_ENABLE_LOGGING_STDIO == 0)
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182
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183 #include <boost/thread/mutex.hpp>
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184
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185 namespace Orthanc
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186 {
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187 namespace Logging
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188 {
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189 class ORTHANC_PUBLIC InternalLogger
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190 {
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191 private:
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192 boost::mutex::scoped_lock lock_;
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193 NullStream null_;
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194 std::ostream* stream_;
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195
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196 public:
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197 InternalLogger(LogLevel level,
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198 const char* file,
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199 int line);
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200
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201 ~InternalLogger();
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202
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203 template <typename T>
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204 std::ostream& operator<< (const T& message)
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205 {
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206 return (*stream_) << boost::lexical_cast<std::string>(message);
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207 }
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208 };
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209
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210
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211 /**
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212 * Set custom logging streams for the error, warning and info
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213 * logs. This function may not be called if a log file or folder
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214 * has been set beforehand. All three references must be valid.
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215 *
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216 * Please ensure the supplied streams remain alive and valid as
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217 * long as logging calls are performed. In order to prevent
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218 * dangling pointer usage, it is mandatory to call
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219 * Orthanc::Logging::Reset() before the stream objects are
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220 * destroyed and the references become invalid.
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221 *
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222 * This function must only be used by unit tests.
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223 **/
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224 ORTHANC_PUBLIC void SetErrorWarnInfoLoggingStreams(std::ostream& errorStream,
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225 std::ostream& warningStream,
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226 std::ostream& infoStream);
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227 }
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228 }
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229
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230 #endif