annotate OrthancFramework/Sources/Logging.h @ 4437:d9473bd5ed43

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 06 Jan 2021 17:27:28 +0100
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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 * Copyright (C) 2017-2021 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 Lesser General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Lesser General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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22
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23 #pragma once
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24
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25 // To have ORTHANC_ENABLE_LOGGING defined if using the shared library
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26 #include "OrthancFramework.h"
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27 #include "Compatibility.h"
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28
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29 #include <iostream>
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30
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31 #if !defined(ORTHANC_ENABLE_LOGGING)
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32 # error The macro ORTHANC_ENABLE_LOGGING must be defined
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33 #endif
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34
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35 #if !defined(ORTHANC_ENABLE_LOGGING_STDIO)
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36 # if ORTHANC_ENABLE_LOGGING == 1
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37 # error The macro ORTHANC_ENABLE_LOGGING_STDIO must be defined
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38 # else
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39 # define ORTHANC_ENABLE_LOGGING_STDIO 0
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40 # endif
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41 #endif
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42
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43
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44 namespace Orthanc
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45 {
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46 namespace Logging
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47 {
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48 enum LogLevel
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49 {
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50 LogLevel_ERROR,
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51 LogLevel_WARNING,
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52 LogLevel_INFO,
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53 LogLevel_TRACE
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54 };
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55
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56 /**
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57 * NB: The log level for each category is encoded as a bit
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58 * mask. As a consequence, there can be up to 31 log categories
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59 * (not 32, as the value GENERIC is reserved for the log commands
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60 * that don't fall in a specific category).
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61 **/
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62 enum LogCategory
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63 {
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64 LogCategory_GENERIC = (1 << 0),
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65 LogCategory_PLUGINS = (1 << 1),
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66 LogCategory_HTTP = (1 << 2),
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67 LogCategory_SQLITE = (1 << 3),
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68 LogCategory_DICOM = (1 << 4),
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69 LogCategory_JOBS = (1 << 5),
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70 LogCategory_LUA = (1 << 6),
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71 };
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72
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73 ORTHANC_PUBLIC const char* EnumerationToString(LogLevel level);
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74
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75 ORTHANC_PUBLIC LogLevel StringToLogLevel(const char* level);
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76
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77 // "pluginContext" must be of type "OrthancPluginContext"
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78 ORTHANC_PUBLIC void InitializePluginContext(void* pluginContext);
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79
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80 ORTHANC_PUBLIC void Initialize();
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81
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82 ORTHANC_PUBLIC void Finalize();
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83
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84 ORTHANC_PUBLIC void Reset();
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86 ORTHANC_PUBLIC void Flush();
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87
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88 ORTHANC_PUBLIC void EnableInfoLevel(bool enabled);
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89
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90 ORTHANC_PUBLIC void EnableTraceLevel(bool enabled);
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91
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92 ORTHANC_PUBLIC bool IsTraceLevelEnabled();
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93
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94 ORTHANC_PUBLIC bool IsInfoLevelEnabled();
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95
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96 ORTHANC_PUBLIC void SetCategoryEnabled(LogLevel level,
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97 LogCategory category,
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98 bool enabled);
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99
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100 ORTHANC_PUBLIC bool IsCategoryEnabled(LogLevel level,
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101 LogCategory category);
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102
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103 ORTHANC_PUBLIC bool LookupCategory(LogCategory& target,
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104 const std::string& category);
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105
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106 ORTHANC_PUBLIC unsigned int GetCategoriesCount();
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107
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108 ORTHANC_PUBLIC const char* GetCategoryName(unsigned int i);
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109
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110 ORTHANC_PUBLIC const char* GetCategoryName(LogCategory category);
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111
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112 ORTHANC_PUBLIC void SetTargetFile(const std::string& path);
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113
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114 ORTHANC_PUBLIC void SetTargetFolder(const std::string& path);
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115
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116 struct ORTHANC_LOCAL NullStream : public std::ostream
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117 {
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118 NullStream() :
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119 std::ios(0),
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120 std::ostream(0)
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121 {
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122 }
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123
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124 template <typename T>
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125 std::ostream& operator<< (const T& message)
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126 {
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127 return *this;
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128 }
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129 };
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130 }
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131 }
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132
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133
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134
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135 /**
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136 * NB:
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137 * - The "VLOG(unused)" macro is for backward compatibility with
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138 * Orthanc <= 1.8.0.
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139 * - The "CLOG()" macro stands for "category log" (new in Orthanc 1.8.1)
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140 **/
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141
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142 #if defined(LOG)
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143 # error The macro LOG cannot be defined beforehand
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144 #endif
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145
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146 #if defined(VLOG)
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147 # error The macro VLOG cannot be defined beforehand
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148 #endif
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149
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150 #if defined(CLOG)
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151 # error The macro CLOG cannot be defined beforehand
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152 #endif
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153
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154 #if ORTHANC_ENABLE_LOGGING != 1
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155 # define LOG(level) ::Orthanc::Logging::NullStream()
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156 # define VLOG(unused) ::Orthanc::Logging::NullStream()
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157 # define CLOG(level, category) ::Orthanc::Logging::NullStream()
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158 #else /* ORTHANC_ENABLE_LOGGING == 1 */
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159 # define LOG(level) ::Orthanc::Logging::InternalLogger \
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160 (::Orthanc::Logging::LogLevel_ ## level, \
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161 ::Orthanc::Logging::LogCategory_GENERIC, __FILE__, __LINE__)
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162 # define VLOG(unused) ::Orthanc::Logging::InternalLogger \
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163 (::Orthanc::Logging::LogLevel_TRACE, \
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164 ::Orthanc::Logging::LogCategory_GENERIC, __FILE__, __LINE__)
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165 # define CLOG(level, category) ::Orthanc::Logging::InternalLogger \
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166 (::Orthanc::Logging::LogLevel_ ## level, \
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167 ::Orthanc::Logging::LogCategory_ ## category, __FILE__, __LINE__)
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168 #endif
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169
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170
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171
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172 #if (ORTHANC_ENABLE_LOGGING == 1 && \
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173 ORTHANC_ENABLE_LOGGING_STDIO == 1)
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174 // This is notably for WebAssembly
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175
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176 #include <boost/lexical_cast.hpp>
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177 #include <boost/noncopyable.hpp>
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178 #include <sstream>
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179
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180 namespace Orthanc
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181 {
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182 namespace Logging
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183 {
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184 class ORTHANC_PUBLIC InternalLogger : public boost::noncopyable
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185 {
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186 private:
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187 LogLevel level_;
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188 LogCategory category_;
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189 std::stringstream messageStream_;
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190
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191 public:
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192 InternalLogger(LogLevel level,
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193 LogCategory category,
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194 const char* file /* ignored */,
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195 int line /* ignored */) :
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196 level_(level),
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197 category_(category)
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198 {
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199 }
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200
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201 // For backward binary compatibility with Orthanc Framework <= 1.8.0
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202 InternalLogger(LogLevel level,
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203 const char* file /* ignored */,
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204 int line /* ignored */) :
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205 level_(level),
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206 category_(LogCategory_GENERIC)
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207 {
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208 }
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209
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210 ~InternalLogger();
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211
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212 template <typename T>
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213 std::ostream& operator<< (const T& message)
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214 {
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215 return messageStream_ << boost::lexical_cast<std::string>(message);
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216 }
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217 };
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218 }
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219 }
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220
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221 #endif
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222
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223
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224
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225 #if (ORTHANC_ENABLE_LOGGING == 1 && \
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226 ORTHANC_ENABLE_LOGGING_STDIO == 0)
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227
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228 #include <boost/lexical_cast.hpp>
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229 #include <boost/noncopyable.hpp>
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230 #include <boost/thread/mutex.hpp>
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231 #include <sstream>
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232
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233 namespace Orthanc
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234 {
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235 namespace Logging
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236 {
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237 class ORTHANC_PUBLIC InternalLogger : public boost::noncopyable
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238 {
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239 private:
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240 boost::mutex::scoped_lock lock_;
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241 LogLevel level_;
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242 std::unique_ptr<std::stringstream> pluginStream_;
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243 std::ostream* stream_;
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244
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245 void Setup(LogCategory category,
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246 const char* file,
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247 int line);
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248
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249 public:
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250 InternalLogger(LogLevel level,
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251 LogCategory category,
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252 const char* file,
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253 int line);
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254
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255 // For backward binary compatibility with Orthanc Framework <= 1.8.0
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256 InternalLogger(LogLevel level,
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257 const char* file,
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258 int line);
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259
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260 ~InternalLogger();
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261
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262 template <typename T>
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263 std::ostream& operator<< (const T& message)
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264 {
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265 return (*stream_) << boost::lexical_cast<std::string>(message);
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266 }
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267 };
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268
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269 /**
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270 * Set custom logging streams for the error, warning and info
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271 * logs. This function may not be called if a log file or folder
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272 * has been set beforehand. All three references must be valid.
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273 *
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274 * Please ensure the supplied streams remain alive and valid as
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275 * long as logging calls are performed. In order to prevent
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276 * dangling pointer usage, it is mandatory to call
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277 * Orthanc::Logging::Reset() before the stream objects are
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278 * destroyed and the references become invalid.
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279 *
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280 * This function must only be used by unit tests. It is ignored if
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281 * InitializePluginContext() was called.
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282 **/
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283 ORTHANC_PUBLIC void SetErrorWarnInfoLoggingStreams(std::ostream& errorStream,
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284 std::ostream& warningStream,
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285 std::ostream& infoStream);
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286 }
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287 }
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288
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289 #endif