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annotate Core/MetricsRegistry.h @ 3995:1f405a3fdeca

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reorganizing Logging
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 05 Jun 2020 18:08:17 +0200
parents f9863630ec7f
children 05a363186da6
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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 #include "OrthancFramework.h"
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37
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38 #if !defined(ORTHANC_SANDBOXED)
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39 # error The macro ORTHANC_SANDBOXED must be defined
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40 #endif
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41
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42 #if ORTHANC_SANDBOXED == 1
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43 # error The class MetricsRegistry cannot be used in sandboxed environments
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44 #endif
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45
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46 #include <boost/thread/mutex.hpp>
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47 #include <boost/date_time/posix_time/posix_time.hpp>
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48
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49 namespace Orthanc
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50 {
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51 enum MetricsType
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52 {
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53 MetricsType_Default,
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54 MetricsType_MaxOver10Seconds,
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55 MetricsType_MaxOver1Minute,
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56 MetricsType_MinOver10Seconds,
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57 MetricsType_MinOver1Minute
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58 };
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59
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60 class ORTHANC_PUBLIC MetricsRegistry : public boost::noncopyable
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61 {
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62 private:
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63 class Item;
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64
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65 typedef std::map<std::string, Item*> Content;
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66
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67 bool enabled_;
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68 boost::mutex mutex_;
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69 Content content_;
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70
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71 void SetValueInternal(const std::string& name,
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72 float value,
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73 MetricsType type);
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74
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75 public:
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76 MetricsRegistry() :
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77 enabled_(true)
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78 {
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79 }
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80
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81 ~MetricsRegistry();
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82
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83 bool IsEnabled() const
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84 {
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85 return enabled_;
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86 }
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87
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88 void SetEnabled(bool enabled);
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89
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90 void Register(const std::string& name,
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91 MetricsType type);
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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 MetricsType type)
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96 {
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97 // Inlining to avoid loosing time if metrics are disabled
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98 if (enabled_)
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99 {
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100 SetValueInternal(name, value, type);
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101 }
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102 }
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103
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104 void SetValue(const std::string& name,
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105 float value)
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106 {
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107 SetValue(name, value, MetricsType_Default);
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108 }
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109
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110 MetricsType GetMetricsType(const std::string& name);
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111
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112 // https://prometheus.io/docs/instrumenting/exposition_formats/#text-based-format
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113 void ExportPrometheusText(std::string& s);
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114
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115
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116 class SharedMetrics : public boost::noncopyable
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117 {
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118 private:
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119 boost::mutex mutex_;
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120 MetricsRegistry& registry_;
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121 std::string name_;
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122 float value_;
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123
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124 public:
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125 SharedMetrics(MetricsRegistry& registry,
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126 const std::string& name,
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127 MetricsType type) :
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128 registry_(registry),
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129 name_(name),
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130 value_(0)
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131 {
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132 }
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133
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134 void Add(float delta);
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135 };
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136
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137
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138 class ActiveCounter : public boost::noncopyable
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139 {
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140 private:
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141 SharedMetrics& metrics_;
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142
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143 public:
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144 ActiveCounter(SharedMetrics& metrics) :
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145 metrics_(metrics)
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146 {
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147 metrics_.Add(1);
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148 }
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149
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150 ~ActiveCounter()
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151 {
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152 metrics_.Add(-1);
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153 }
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154 };
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155
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156
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157 class Timer : public boost::noncopyable
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158 {
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159 private:
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160 MetricsRegistry& registry_;
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161 std::string name_;
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162 MetricsType type_;
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163 bool active_;
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164 boost::posix_time::ptime start_;
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165
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166 void Start();
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167
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168 public:
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169 Timer(MetricsRegistry& registry,
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170 const std::string& name) :
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171 registry_(registry),
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172 name_(name),
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173 type_(MetricsType_MaxOver10Seconds)
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174 {
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175 Start();
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176 }
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177
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178 Timer(MetricsRegistry& registry,
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179 const std::string& name,
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180 MetricsType type) :
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181 registry_(registry),
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182 name_(name),
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183 type_(type)
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184 {
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185 Start();
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186 }
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187
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188 ~Timer();
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189 };
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190 };
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191 }