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annotate Core/MetricsRegistry.h @ 4112:eeecb3e0adc7 Orthanc-1.6.1

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closing Orthanc-1.6.1
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 07 Jul 2020 13:08:35 +0200
parents 94f4a18a79cc
children f9863630ec7f
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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 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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32
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33
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34 #pragma once
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35
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36 #if !defined(ORTHANC_SANDBOXED)
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37 # error The macro ORTHANC_SANDBOXED must be defined
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38 #endif
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39
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40 #if ORTHANC_SANDBOXED == 1
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41 # error The class MetricsRegistry cannot be used in sandboxed environments
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42 #endif
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43
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44 #include <boost/thread/mutex.hpp>
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45 #include <boost/date_time/posix_time/posix_time.hpp>
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46
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47 namespace Orthanc
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48 {
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49 enum MetricsType
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50 {
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51 MetricsType_Default,
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52 MetricsType_MaxOver10Seconds,
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53 MetricsType_MaxOver1Minute,
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54 MetricsType_MinOver10Seconds,
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55 MetricsType_MinOver1Minute
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56 };
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57
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58 class MetricsRegistry : public boost::noncopyable
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59 {
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60 private:
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61 class Item;
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62
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63 typedef std::map<std::string, Item*> Content;
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64
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65 bool enabled_;
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66 boost::mutex mutex_;
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67 Content content_;
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68
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69 void SetValueInternal(const std::string& name,
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70 float value,
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71 MetricsType type);
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72
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73 public:
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74 MetricsRegistry() :
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75 enabled_(true)
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76 {
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77 }
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78
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79 ~MetricsRegistry();
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80
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81 bool IsEnabled() const
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82 {
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83 return enabled_;
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84 }
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85
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86 void SetEnabled(bool enabled);
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87
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88 void Register(const std::string& name,
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89 MetricsType type);
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90
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91 void SetValue(const std::string& name,
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92 float value,
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93 MetricsType type)
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94 {
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95 // Inlining to avoid loosing time if metrics are disabled
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96 if (enabled_)
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97 {
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98 SetValueInternal(name, value, type);
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99 }
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100 }
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101
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102 void SetValue(const std::string& name,
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103 float value)
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104 {
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105 SetValue(name, value, MetricsType_Default);
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106 }
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107
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108 MetricsType GetMetricsType(const std::string& name);
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109
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110 // https://prometheus.io/docs/instrumenting/exposition_formats/#text-based-format
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111 void ExportPrometheusText(std::string& s);
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112
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113
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114 class SharedMetrics : public boost::noncopyable
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115 {
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116 private:
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117 boost::mutex mutex_;
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118 MetricsRegistry& registry_;
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119 std::string name_;
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120 float value_;
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121
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122 public:
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123 SharedMetrics(MetricsRegistry& registry,
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124 const std::string& name,
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125 MetricsType type) :
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126 registry_(registry),
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127 name_(name),
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128 value_(0)
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129 {
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130 }
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131
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132 void Add(float delta);
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133 };
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134
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135
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136 class ActiveCounter : public boost::noncopyable
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137 {
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138 private:
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139 SharedMetrics& metrics_;
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140
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141 public:
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142 ActiveCounter(SharedMetrics& metrics) :
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143 metrics_(metrics)
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144 {
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145 metrics_.Add(1);
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146 }
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147
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148 ~ActiveCounter()
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149 {
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150 metrics_.Add(-1);
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151 }
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152 };
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153
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154
3174
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155 class Timer : public boost::noncopyable
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156 {
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157 private:
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158 MetricsRegistry& registry_;
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159 std::string name_;
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160 MetricsType type_;
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161 bool active_;
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162 boost::posix_time::ptime start_;
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163
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164 void Start();
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165
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166 public:
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167 Timer(MetricsRegistry& registry,
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168 const std::string& name) :
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169 registry_(registry),
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170 name_(name),
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171 type_(MetricsType_MaxOver10Seconds)
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172 {
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173 Start();
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174 }
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175
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176 Timer(MetricsRegistry& registry,
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177 const std::string& name,
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178 MetricsType type) :
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179 registry_(registry),
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180 name_(name),
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181 type_(type)
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182 {
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183 Start();
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184 }
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185
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186 ~Timer();
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187 };
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188 };
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189 }