Mercurial > hg > orthanc

annotate OrthancFramework/Sources/Logging.h @ 4087:dcf4d83374a6 framework

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integration mainline->framework
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 26 Jun 2020 09:47:51 +0200
parents d25f4c0fa160
children bf7b9edf6b81
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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_STDIO)
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46 # if ORTHANC_ENABLE_LOGGING == 1
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47 # error The macro ORTHANC_ENABLE_LOGGING_STDIO must be defined
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48 # else
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49 # define ORTHANC_ENABLE_LOGGING_STDIO 0
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50 # endif
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51 #endif
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52
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54 namespace Orthanc
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55 {
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56 namespace Logging
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57 {
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58 enum LogLevel
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59 {
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60 LogLevel_ERROR,
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61 LogLevel_WARNING,
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62 LogLevel_INFO,
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63 LogLevel_TRACE
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64 };
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65
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66 ORTHANC_PUBLIC const char* EnumerationToString(LogLevel level);
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67
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68 ORTHANC_PUBLIC LogLevel StringToLogLevel(const char* level);
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69
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70 // "pluginContext" must be of type "OrthancPluginContext"
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71 ORTHANC_PUBLIC void InitializePluginContext(void* pluginContext);
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72
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73 ORTHANC_PUBLIC void Initialize();
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74
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75 ORTHANC_PUBLIC void Finalize();
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76
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77 ORTHANC_PUBLIC void Reset();
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78
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79 ORTHANC_PUBLIC void Flush();
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81 ORTHANC_PUBLIC void EnableInfoLevel(bool enabled);
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82
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83 ORTHANC_PUBLIC void EnableTraceLevel(bool enabled);
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84
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85 ORTHANC_PUBLIC bool IsTraceLevelEnabled();
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86
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87 ORTHANC_PUBLIC bool IsInfoLevelEnabled();
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89 ORTHANC_PUBLIC void SetTargetFile(const std::string& path);
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91 ORTHANC_PUBLIC void SetTargetFolder(const std::string& path);
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92
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93 struct NullStream : public std::ostream
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94 {
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95 NullStream() :
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96 std::ios(0),
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97 std::ostream(0)
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98 {
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99 }
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100
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101 template <typename T>
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102 std::ostream& operator<< (const T& message)
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103 {
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104 return *this;
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105 }
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106 };
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107 }
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108 }
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109
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110
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111 #if ORTHANC_ENABLE_LOGGING != 1
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112 # define LOG(level) ::Orthanc::Logging::NullStream()
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113 # define VLOG(level) ::Orthanc::Logging::NullStream()
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114 #else /* ORTHANC_ENABLE_LOGGING == 1 */
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115 # define LOG(level) ::Orthanc::Logging::InternalLogger \
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116 (::Orthanc::Logging::LogLevel_ ## level, __FILE__, __LINE__)
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117 # define VLOG(level) ::Orthanc::Logging::InternalLogger \
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118 (::Orthanc::Logging::LogLevel_TRACE, __FILE__, __LINE__)
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119 #endif
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120
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121
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122
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123 #if (ORTHANC_ENABLE_LOGGING == 1 && \
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124 ORTHANC_ENABLE_LOGGING_STDIO == 1)
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125 // This is notably for WebAssembly
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126
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127 #include <boost/lexical_cast.hpp>
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128 #include <boost/noncopyable.hpp>
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129 #include <sstream>
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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 class ORTHANC_PUBLIC InternalLogger : public boost::noncopyable
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136 {
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137 private:
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138 LogLevel level_;
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139 std::stringstream messageStream_;
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140
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141 public:
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142 InternalLogger(LogLevel level,
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143 const char* file /* ignored */,
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144 int line /* ignored */) :
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145 level_(level)
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146 {
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147 }
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148
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149 ~InternalLogger();
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150
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151 template <typename T>
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152 std::ostream& operator<< (const T& message)
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153 {
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154 return messageStream_ << boost::lexical_cast<std::string>(message);
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155 }
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156 };
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157 }
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158 }
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159
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160 #endif
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161
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162
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163
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164 #if (ORTHANC_ENABLE_LOGGING == 1 && \
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165 ORTHANC_ENABLE_LOGGING_STDIO == 0)
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166
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167 #include "Compatibility.h" // For std::unique_ptr<>
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168
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169 #include <boost/lexical_cast.hpp>
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170 #include <boost/noncopyable.hpp>
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171 #include <boost/thread/mutex.hpp>
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172 #include <sstream>
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173
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174 namespace Orthanc
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175 {
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176 namespace Logging
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177 {
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178 class ORTHANC_PUBLIC InternalLogger : public boost::noncopyable
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179 {
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180 private:
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181 boost::mutex::scoped_lock lock_;
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182 LogLevel level_;
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183 std::unique_ptr<std::stringstream> pluginStream_;
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184 std::ostream* stream_;
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185
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186 public:
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187 InternalLogger(LogLevel level,
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188 const char* file,
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189 int line);
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190
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191 ~InternalLogger();
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192
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193 template <typename T>
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194 std::ostream& operator<< (const T& message)
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195 {
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196 return (*stream_) << boost::lexical_cast<std::string>(message);
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197 }
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198 };
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199
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201 /**
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202 * Set custom logging streams for the error, warning and info
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203 * logs. This function may not be called if a log file or folder
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204 * has been set beforehand. All three references must be valid.
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205 *
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206 * Please ensure the supplied streams remain alive and valid as
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207 * long as logging calls are performed. In order to prevent
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208 * dangling pointer usage, it is mandatory to call
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209 * Orthanc::Logging::Reset() before the stream objects are
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210 * destroyed and the references become invalid.
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211 *
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212 * This function must only be used by unit tests. It is ignored if
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213 * InitializePluginContext() was called.
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214 **/
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215 ORTHANC_PUBLIC void SetErrorWarnInfoLoggingStreams(std::ostream& errorStream,
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216 std::ostream& warningStream,
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217 std::ostream& infoStream);
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218 }
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219 }
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220
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221 #endif