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annotate OrthancFramework/Sources/Logging.h @ 4277:c5ca798b158a

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CheckOrthancFrameworkSymbols.py
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 03 Nov 2020 18:45:32 +0100
parents d7a50b7b8466
children 0923247e69f6
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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) 2017-2020 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 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
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28 #include <iostream>
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29
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30 #if !defined(ORTHANC_ENABLE_LOGGING)
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31 # error The macro ORTHANC_ENABLE_LOGGING must be defined
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32 #endif
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33
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34 #if !defined(ORTHANC_ENABLE_LOGGING_STDIO)
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35 # if ORTHANC_ENABLE_LOGGING == 1
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36 # error The macro ORTHANC_ENABLE_LOGGING_STDIO must be defined
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37 # else
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38 # define ORTHANC_ENABLE_LOGGING_STDIO 0
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39 # endif
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40 #endif
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42
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43 namespace Orthanc
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44 {
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45 namespace Logging
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46 {
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47 enum LogLevel
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48 {
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49 LogLevel_ERROR,
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50 LogLevel_WARNING,
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51 LogLevel_INFO,
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52 LogLevel_TRACE
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53 };
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54
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55 /**
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56 * NB: The log level for each category is encoded as a bit
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57 * mask. As a consequence, there can be up to 31 log categories
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58 * (not 32, as the value GENERIC is reserved for the log commands
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59 * that don't fall in a specific category).
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60 **/
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61 enum LogCategory
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62 {
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63 LogCategory_GENERIC = (1 << 0),
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64 LogCategory_PLUGINS = (1 << 1),
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65 LogCategory_REST = (1 << 2),
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66 LogCategory_SQLITE = (1 << 3),
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67 LogCategory_DICOM = (1 << 4)
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68 };
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69
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70 ORTHANC_PUBLIC const char* EnumerationToString(LogLevel level);
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71
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72 ORTHANC_PUBLIC LogLevel StringToLogLevel(const char* level);
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73
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74 // "pluginContext" must be of type "OrthancPluginContext"
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75 ORTHANC_PUBLIC void InitializePluginContext(void* pluginContext);
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76
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77 ORTHANC_PUBLIC void Initialize();
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78
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79 ORTHANC_PUBLIC void Finalize();
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80
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81 ORTHANC_PUBLIC void Reset();
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82
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83 ORTHANC_PUBLIC void Flush();
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84
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85 ORTHANC_PUBLIC void EnableInfoLevel(bool enabled);
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86
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87 ORTHANC_PUBLIC void EnableTraceLevel(bool enabled);
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88
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89 ORTHANC_PUBLIC bool IsTraceLevelEnabled();
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90
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91 ORTHANC_PUBLIC bool IsInfoLevelEnabled();
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92
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93 ORTHANC_PUBLIC void SetCategoryEnabled(LogLevel level,
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94 LogCategory category,
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95 bool enabled);
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96
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97 ORTHANC_PUBLIC bool IsCategoryEnabled(LogLevel level,
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98 LogCategory category);
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99
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100 ORTHANC_PUBLIC bool LookupCategory(LogCategory& target,
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101 const std::string& category);
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102
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103 ORTHANC_PUBLIC unsigned int GetCategoriesCount();
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104
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105 ORTHANC_PUBLIC const char* GetCategoryName(unsigned int i);
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106
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107 ORTHANC_PUBLIC const char* GetCategoryName(LogCategory category);
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108
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109 ORTHANC_PUBLIC void SetTargetFile(const std::string& path);
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110
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111 ORTHANC_PUBLIC void SetTargetFolder(const std::string& path);
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112
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113 struct NullStream : public std::ostream
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114 {
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115 NullStream() :
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116 std::ios(0),
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117 std::ostream(0)
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118 {
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119 }
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120
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121 template <typename T>
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122 std::ostream& operator<< (const T& message)
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123 {
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124 return *this;
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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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131
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132 /**
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133 * NB:
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134 * - The "VLOG(unused)" macro is for backward compatibility with
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135 * Orthanc <= 1.8.0.
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136 * - The "CLOG()" macro stands for "category log" (new in Orthanc 1.8.1)
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137 **/
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138
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139 #if defined(LOG)
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140 # error The macro LOG cannot be defined beforehand
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141 #endif
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142
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143 #if defined(VLOG)
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144 # error The macro VLOG cannot be defined beforehand
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145 #endif
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146
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147 #if defined(CLOG)
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148 # error The macro CLOG cannot be defined beforehand
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149 #endif
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150
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151 #if ORTHANC_ENABLE_LOGGING != 1
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152 # define LOG(level) ::Orthanc::Logging::NullStream()
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153 # define VLOG(unused) ::Orthanc::Logging::NullStream()
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154 # define CLOG(level, category) ::Orthanc::Logging::NullStream()
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155 #else /* ORTHANC_ENABLE_LOGGING == 1 */
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156 # define LOG(level) ::Orthanc::Logging::InternalLogger \
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157 (::Orthanc::Logging::LogLevel_ ## level, \
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158 ::Orthanc::Logging::LogCategory_GENERIC, __FILE__, __LINE__)
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159 # define VLOG(unused) ::Orthanc::Logging::InternalLogger \
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160 (::Orthanc::Logging::LogLevel_TRACE, \
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161 ::Orthanc::Logging::LogCategory_GENERIC, __FILE__, __LINE__)
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162 # define CLOG(level, category) ::Orthanc::Logging::InternalLogger \
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163 (::Orthanc::Logging::LogLevel_ ## level, \
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164 ::Orthanc::Logging::LogCategory_ ## category, __FILE__, __LINE__)
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165 #endif
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166
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167
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168
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169 #if (ORTHANC_ENABLE_LOGGING == 1 && \
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170 ORTHANC_ENABLE_LOGGING_STDIO == 1)
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171 // This is notably for WebAssembly
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172
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173 #include <boost/lexical_cast.hpp>
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174 #include <boost/noncopyable.hpp>
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175 #include <sstream>
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176
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177 namespace Orthanc
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178 {
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179 namespace Logging
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180 {
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181 class ORTHANC_PUBLIC InternalLogger : public boost::noncopyable
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182 {
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183 private:
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184 LogLevel level_;
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185 LogCategory category_;
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186 std::stringstream messageStream_;
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187
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188 public:
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189 InternalLogger(LogLevel level,
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190 LogCategory category,
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191 const char* file /* ignored */,
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192 int line /* ignored */) :
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193 level_(level),
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194 category_(category)
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195 {
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196 }
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197
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198 // For backward binary compatibility with Orthanc Framework <= 1.8.0
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199 InternalLogger(LogLevel level,
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200 const char* file /* ignored */,
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201 int line /* ignored */) :
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202 level_(level),
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203 category_(LogCategory_GENERIC)
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204 {
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205 }
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206
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207 ~InternalLogger();
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208
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209 template <typename T>
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210 std::ostream& operator<< (const T& message)
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211 {
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212 return messageStream_ << boost::lexical_cast<std::string>(message);
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213 }
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214 };
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215 }
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216 }
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217
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218 #endif
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219
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220
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221
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222 #if (ORTHANC_ENABLE_LOGGING == 1 && \
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223 ORTHANC_ENABLE_LOGGING_STDIO == 0)
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224
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225 #include "Compatibility.h" // For std::unique_ptr<>
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226
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227 #include <boost/lexical_cast.hpp>
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228 #include <boost/noncopyable.hpp>
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229 #include <boost/thread/mutex.hpp>
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230 #include <sstream>
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231
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232 namespace Orthanc
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233 {
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234 namespace Logging
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235 {
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236 class ORTHANC_PUBLIC InternalLogger : public boost::noncopyable
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237 {
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238 private:
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239 boost::mutex::scoped_lock lock_;
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240 LogLevel level_;
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241 std::unique_ptr<std::stringstream> pluginStream_;
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242 std::ostream* stream_;
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243
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244 void Setup(LogCategory category,
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245 const char* file,
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246 int line);
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247
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248 public:
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249 InternalLogger(LogLevel level,
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250 LogCategory category,
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251 const char* file,
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252 int line);
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253
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254 // For backward binary compatibility with Orthanc Framework <= 1.8.0
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255 InternalLogger(LogLevel level,
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256 const char* file,
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257 int line);
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258
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259 ~InternalLogger();
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260
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261 template <typename T>
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262 std::ostream& operator<< (const T& message)
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263 {
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264 return (*stream_) << boost::lexical_cast<std::string>(message);
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265 }
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266 };
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267
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268 /**
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269 * Set custom logging streams for the error, warning and info
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270 * logs. This function may not be called if a log file or folder
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271 * has been set beforehand. All three references must be valid.
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272 *
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273 * Please ensure the supplied streams remain alive and valid as
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274 * long as logging calls are performed. In order to prevent
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275 * dangling pointer usage, it is mandatory to call
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276 * Orthanc::Logging::Reset() before the stream objects are
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277 * destroyed and the references become invalid.
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278 *
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279 * This function must only be used by unit tests. It is ignored if
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280 * InitializePluginContext() was called.
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281 **/
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282 ORTHANC_PUBLIC void SetErrorWarnInfoLoggingStreams(std::ostream& errorStream,
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283 std::ostream& warningStream,
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284 std::ostream& infoStream);
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285 }
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286 }
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287
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288 #endif