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annotate OrthancFramework/Sources/MetricsRegistry.h @ 4119:bf7b9edf6b81 framework-lgpl

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re-licensing the OrthancFramework to LGPL, in order to license Stone of Orthanc under LGPL
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 07 Jul 2020 19:17:56 +0200
parents d25f4c0fa160
children 7112a8af0b63
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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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21
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22
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23 #pragma once
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24
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25 #include "OrthancFramework.h"
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26
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27 #if !defined(ORTHANC_SANDBOXED)
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28 # error The macro ORTHANC_SANDBOXED must be defined
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29 #endif
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30
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31 #if ORTHANC_SANDBOXED == 1
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32 # error The class MetricsRegistry cannot be used in sandboxed environments
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33 #endif
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34
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35 #include <boost/thread/mutex.hpp>
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36 #include <boost/date_time/posix_time/posix_time.hpp>
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37
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38 namespace Orthanc
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39 {
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40 enum MetricsType
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41 {
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42 MetricsType_Default,
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43 MetricsType_MaxOver10Seconds,
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44 MetricsType_MaxOver1Minute,
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45 MetricsType_MinOver10Seconds,
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46 MetricsType_MinOver1Minute
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47 };
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48
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49 class ORTHANC_PUBLIC MetricsRegistry : public boost::noncopyable
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50 {
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51 private:
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52 class Item;
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53
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54 typedef std::map<std::string, Item*> Content;
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55
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56 bool enabled_;
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57 boost::mutex mutex_;
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58 Content content_;
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59
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60 void SetValueInternal(const std::string& name,
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61 float value,
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62 MetricsType type);
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63
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64 public:
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65 MetricsRegistry() :
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66 enabled_(true)
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67 {
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68 }
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69
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70 ~MetricsRegistry();
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71
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72 bool IsEnabled() const
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73 {
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74 return enabled_;
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75 }
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76
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77 void SetEnabled(bool enabled);
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78
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79 void Register(const std::string& name,
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80 MetricsType type);
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81
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82 void SetValue(const std::string& name,
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83 float value,
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84 MetricsType type)
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85 {
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86 // Inlining to avoid loosing time if metrics are disabled
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87 if (enabled_)
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88 {
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89 SetValueInternal(name, value, type);
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90 }
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91 }
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92
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93 void SetValue(const std::string& name,
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94 float value)
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95 {
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96 SetValue(name, value, MetricsType_Default);
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97 }
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98
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99 MetricsType GetMetricsType(const std::string& name);
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100
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101 // https://prometheus.io/docs/instrumenting/exposition_formats/#text-based-format
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102 void ExportPrometheusText(std::string& s);
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103
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104
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105 class ORTHANC_PUBLIC SharedMetrics : public boost::noncopyable
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106 {
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107 private:
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108 boost::mutex mutex_;
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109 MetricsRegistry& registry_;
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110 std::string name_;
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111 float value_;
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112
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113 public:
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114 SharedMetrics(MetricsRegistry& registry,
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115 const std::string& name,
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116 MetricsType type) :
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117 registry_(registry),
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118 name_(name),
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119 value_(0)
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120 {
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121 }
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122
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123 void Add(float delta);
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124 };
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125
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126
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127 class ORTHANC_PUBLIC ActiveCounter : public boost::noncopyable
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128 {
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129 private:
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130 SharedMetrics& metrics_;
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131
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132 public:
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133 ActiveCounter(SharedMetrics& metrics) :
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134 metrics_(metrics)
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135 {
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136 metrics_.Add(1);
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137 }
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138
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139 ~ActiveCounter()
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140 {
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141 metrics_.Add(-1);
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142 }
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143 };
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144
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145
4026
05a363186da6 ORTHANC_BUILDING_FRAMEWORK_LIBRARY, Orthanc::InitializeFramework()
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146 class ORTHANC_PUBLIC Timer : public boost::noncopyable
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147 {
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148 private:
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149 MetricsRegistry& registry_;
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150 std::string name_;
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151 MetricsType type_;
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152 bool active_;
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153 boost::posix_time::ptime start_;
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154
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155 void Start();
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156
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157 public:
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158 Timer(MetricsRegistry& registry,
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159 const std::string& name) :
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160 registry_(registry),
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161 name_(name),
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162 type_(MetricsType_MaxOver10Seconds)
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163 {
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164 Start();
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165 }
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166
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167 Timer(MetricsRegistry& registry,
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168 const std::string& name,
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169 MetricsType type) :
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170 registry_(registry),
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171 name_(name),
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172 type_(type)
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173 {
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174 Start();
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175 }
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176
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177 ~Timer();
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178 };
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179 };
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180 }