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annotate OrthancFramework/Sources/MetricsRegistry.h @ 5337:b376abae664a

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Metrics can be stored either as floating-point numbers, or as integers
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 27 Jun 2023 17:55:09 +0200
parents dd9795dc380d
children 48b8dae6dc77
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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) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2023 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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22
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23
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24 #pragma once
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25
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26 #include "OrthancFramework.h"
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27
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28 #if !defined(ORTHANC_SANDBOXED)
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29 # error The macro ORTHANC_SANDBOXED must be defined
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30 #endif
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31
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32 #if ORTHANC_SANDBOXED == 1
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33 # error The class MetricsRegistry cannot be used in sandboxed environments
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34 #endif
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35
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36 #include <boost/thread/mutex.hpp>
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37 #include <boost/date_time/posix_time/posix_time.hpp>
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38 #include <stdint.h>
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39
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40 namespace Orthanc
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41 {
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42 enum MetricsUpdatePolicy
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43 {
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44 MetricsUpdatePolicy_Directly,
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45 MetricsUpdatePolicy_MaxOver10Seconds,
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46 MetricsUpdatePolicy_MaxOver1Minute,
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47 MetricsUpdatePolicy_MinOver10Seconds,
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48 MetricsUpdatePolicy_MinOver1Minute
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49 };
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50
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51 enum MetricsDataType
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52 {
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53 MetricsDataType_Float,
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54 MetricsDataType_Integer
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55 };
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56
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57 class ORTHANC_PUBLIC MetricsRegistry : public boost::noncopyable
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58 {
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59 private:
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60 class Item;
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61 class FloatItem;
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62 class IntegerItem;
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63
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64 typedef std::map<std::string, Item*> Content;
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65
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66 bool enabled_;
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67 boost::mutex mutex_;
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68 Content content_;
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69
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70 // The mutex must be locked
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71 Item& GetItemInternal(const std::string& name,
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72 MetricsUpdatePolicy policy,
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73 MetricsDataType type);
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74
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75 public:
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76 MetricsRegistry();
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77
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78 ~MetricsRegistry();
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79
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80 bool IsEnabled() const;
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81
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82 void SetEnabled(bool enabled);
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83
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84 void Register(const std::string& name,
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85 MetricsUpdatePolicy policy,
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86 MetricsDataType type);
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87
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88 void SetFloatValue(const std::string& name,
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89 float value,
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90 MetricsUpdatePolicy policy /* only used if this is a new metrics */);
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91
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92 void SetFloatValue(const std::string& name,
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93 float value)
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94 {
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95 SetFloatValue(name, value, MetricsUpdatePolicy_Directly);
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96 }
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97
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98 void SetIntegerValue(const std::string& name,
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99 int64_t value,
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100 MetricsUpdatePolicy policy /* only used if this is a new metrics */);
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101
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102 void SetIntegerValue(const std::string& name,
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103 int64_t value)
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104 {
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105 SetIntegerValue(name, value, MetricsUpdatePolicy_Directly);
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106 }
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107
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108 void IncrementIntegerValue(const std::string& name,
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109 int64_t delta);
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110
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111 MetricsUpdatePolicy GetUpdatePolicy(const std::string& metrics);
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112
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113 MetricsDataType GetDataType(const std::string& metrics);
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114
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115 // https://prometheus.io/docs/instrumenting/exposition_formats/#text-based-format
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116 void ExportPrometheusText(std::string& s);
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117
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118
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119 class ORTHANC_PUBLIC SharedMetrics : public boost::noncopyable
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120 {
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121 private:
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122 boost::mutex mutex_;
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123 MetricsRegistry& registry_;
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124 std::string name_;
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125 int64_t value_;
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126
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127 public:
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128 SharedMetrics(MetricsRegistry& registry,
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129 const std::string& name,
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130 MetricsUpdatePolicy policy);
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131
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132 void Add(int64_t delta);
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133 };
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134
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135
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136 class ORTHANC_PUBLIC 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 explicit ActiveCounter(SharedMetrics& metrics);
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143
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144 ~ActiveCounter();
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145 };
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146
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147
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148 class ORTHANC_PUBLIC Timer : public boost::noncopyable
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149 {
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150 private:
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151 MetricsRegistry& registry_;
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152 std::string name_;
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153 MetricsUpdatePolicy policy_;
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154 bool active_;
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155 boost::posix_time::ptime start_;
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156
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157 void Start();
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158
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159 public:
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160 Timer(MetricsRegistry& registry,
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161 const std::string& name);
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162
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163 Timer(MetricsRegistry& registry,
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164 const std::string& name,
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165 MetricsUpdatePolicy policy);
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166
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167 ~Timer();
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168 };
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169 };
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170 }