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annotate OrthancFramework/Sources/MetricsRegistry.cpp @ 5335:c103b0e70d75

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refactoring MetricsRegistry::Item
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 27 Jun 2023 15:42:07 +0200
parents fbe857e942cd
children dd9795dc380d
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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 #include "PrecompiledHeaders.h"
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25 #include "MetricsRegistry.h"
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26
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27 #include "ChunkedBuffer.h"
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28 #include "Compatibility.h"
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29 #include "OrthancException.h"
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30
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31 namespace Orthanc
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32 {
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33 static const boost::posix_time::ptime GetNow()
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34 {
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35 return boost::posix_time::microsec_clock::universal_time();
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36 }
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37
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38 class MetricsRegistry::Item
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39 {
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40 private:
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41 MetricsType type_;
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42 boost::posix_time::ptime time_;
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43 bool hasValue_;
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44 int64_t value_;
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45
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46 void SetValue(int64_t value,
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47 const boost::posix_time::ptime& now)
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48 {
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49 hasValue_ = true;
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50 value_ = value;
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51 time_ = now;
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52 }
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53
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54 bool IsLargerOverPeriod(int64_t value,
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55 int duration,
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56 const boost::posix_time::ptime& now) const
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57 {
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58 if (hasValue_)
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59 {
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60 return (value > value_ ||
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61 (now - time_).total_seconds() > duration /* old value has expired */);
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62 }
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63 else
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64 {
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65 return true; // No value yet
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66 }
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67 }
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68
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69 bool IsSmallerOverPeriod(int64_t value,
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70 int duration,
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71 const boost::posix_time::ptime& now) const
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72 {
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73 if (hasValue_)
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74 {
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75 return (value < value_ ||
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76 (now - time_).total_seconds() > duration /* old value has expired */);
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77 }
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78 else
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79 {
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80 return true; // No value yet
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81 }
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82 }
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83
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84 public:
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85 explicit Item(MetricsType type) :
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86 type_(type),
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87 hasValue_(false),
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88 value_(0)
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89 {
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90 }
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91
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92 MetricsType GetType() const
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93 {
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94 return type_;
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95 }
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96
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97 void Update(int64_t value)
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98 {
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99 const boost::posix_time::ptime now = GetNow();
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100
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101 switch (type_)
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102 {
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103 case MetricsType_Default:
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104 SetValue(value, now);
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105 break;
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106
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107 case MetricsType_MaxOver10Seconds:
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108 if (IsLargerOverPeriod(value, 10, now))
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109 {
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110 SetValue(value, now);
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111 }
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112 break;
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113
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114 case MetricsType_MaxOver1Minute:
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115 if (IsLargerOverPeriod(value, 60, now))
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116 {
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117 SetValue(value, now);
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118 }
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119 break;
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120
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121 case MetricsType_MinOver10Seconds:
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122 if (IsSmallerOverPeriod(value, 10, now))
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123 {
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124 SetValue(value, now);
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125 }
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126 break;
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127
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128 case MetricsType_MinOver1Minute:
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129 if (IsSmallerOverPeriod(value, 60, now))
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130 {
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131 SetValue(value, now);
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132 }
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133 break;
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134
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135 default:
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136 throw OrthancException(ErrorCode_NotImplemented);
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137 }
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138 }
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139
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140 bool HasValue() const
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141 {
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142 return hasValue_;
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143 }
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144
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145 const boost::posix_time::ptime& GetTime() const
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146 {
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147 if (hasValue_)
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148 {
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149 return time_;
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150 }
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151 else
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152 {
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153 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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154 }
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155 }
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156
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157 int64_t GetValue() const
3174
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158 {
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159 if (hasValue_)
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160 {
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161 return value_;
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162 }
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163 else
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164 {
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165 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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166 }
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167 }
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168 };
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169
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170
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171 MetricsRegistry::~MetricsRegistry()
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172 {
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173 for (Content::iterator it = content_.begin(); it != content_.end(); ++it)
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174 {
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175 assert(it->second != NULL);
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176 delete it->second;
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177 }
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178 }
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179
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180 bool MetricsRegistry::IsEnabled() const
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181 {
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182 return enabled_;
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183 }
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184
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185
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186 void MetricsRegistry::SetEnabled(bool enabled)
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187 {
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188 boost::mutex::scoped_lock lock(mutex_);
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189 enabled_ = enabled;
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190 }
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191
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192
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193 void MetricsRegistry::Register(const std::string& name,
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194 MetricsType type)
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195 {
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diff changeset
196 boost::mutex::scoped_lock lock(mutex_);
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diff changeset
197
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198 Content::iterator found = content_.find(name);
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199
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200 if (found == content_.end())
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201 {
8ea7c4546c3a primitives to collect metrics in Orthanc
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202 content_[name] = new Item(type);
8ea7c4546c3a primitives to collect metrics in Orthanc
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203 }
8ea7c4546c3a primitives to collect metrics in Orthanc
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204 else
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205 {
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206 assert(found->second != NULL);
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diff changeset
207
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208 // This metrics already exists: Only recreate it if there is a
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diff changeset
209 // mismatch in the type of metrics
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210 if (found->second->GetType() != type)
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diff changeset
211 {
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212 delete found->second;
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diff changeset
213 found->second = new Item(type);
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diff changeset
214 }
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parents:
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215 }
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parents:
diff changeset
216 }
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217
5325
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diff changeset
218
9c00e832985f refactoring MetricsRegistry
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diff changeset
219 MetricsRegistry::Item& MetricsRegistry::GetItemInternal(const std::string& name,
9c00e832985f refactoring MetricsRegistry
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diff changeset
220 MetricsType type)
3174
8ea7c4546c3a primitives to collect metrics in Orthanc
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diff changeset
221 {
8ea7c4546c3a primitives to collect metrics in Orthanc
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222 Content::iterator found = content_.find(name);
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diff changeset
223
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224 if (found == content_.end())
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diff changeset
225 {
5325
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diff changeset
226 Item* item = new Item(type);
9c00e832985f refactoring MetricsRegistry
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227 content_[name] = item;
9c00e832985f refactoring MetricsRegistry
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228 return *item;
3174
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229 }
8ea7c4546c3a primitives to collect metrics in Orthanc
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230 else
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231 {
8ea7c4546c3a primitives to collect metrics in Orthanc
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diff changeset
232 assert(found->second != NULL);
5325
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diff changeset
233 return *found->second;
3174
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diff changeset
234 }
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235 }
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236
4300
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diff changeset
237 MetricsRegistry::MetricsRegistry() :
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diff changeset
238 enabled_(true)
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diff changeset
239 {
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diff changeset
240 }
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diff changeset
241
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242
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diff changeset
243 void MetricsRegistry::SetValue(const std::string &name,
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fbe857e942cd store metrics as integers instead of floats to avoid precision loss in increments
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244 int64_t value,
4300
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diff changeset
245 MetricsType type)
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diff changeset
246 {
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247 // Inlining to avoid loosing time if metrics are disabled
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diff changeset
248 if (enabled_)
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diff changeset
249 {
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diff changeset
250 boost::mutex::scoped_lock lock(mutex_);
9c00e832985f refactoring MetricsRegistry
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diff changeset
251 GetItemInternal(name, type).Update(value);
4300
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diff changeset
252 }
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253 }
b30a8de92ad9 abi continued
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diff changeset
254
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diff changeset
255
5325
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diff changeset
256 void MetricsRegistry::IncrementValue(const std::string &name,
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fbe857e942cd store metrics as integers instead of floats to avoid precision loss in increments
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diff changeset
257 int64_t delta)
4300
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diff changeset
258 {
5325
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diff changeset
259 // Inlining to avoid loosing time if metrics are disabled
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diff changeset
260 if (enabled_)
9c00e832985f refactoring MetricsRegistry
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diff changeset
261 {
9c00e832985f refactoring MetricsRegistry
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diff changeset
262 boost::mutex::scoped_lock lock(mutex_);
9c00e832985f refactoring MetricsRegistry
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diff changeset
263 Item& item = GetItemInternal(name, MetricsType_Default);
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diff changeset
264
9c00e832985f refactoring MetricsRegistry
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diff changeset
265 if (item.HasValue())
9c00e832985f refactoring MetricsRegistry
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diff changeset
266 {
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diff changeset
267 item.Update(item.GetValue() + delta);
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diff changeset
268 }
9c00e832985f refactoring MetricsRegistry
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diff changeset
269 else
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diff changeset
270 {
9c00e832985f refactoring MetricsRegistry
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diff changeset
271 item.Update(delta);
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272 }
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273 }
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274 }
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275
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276
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277 MetricsType MetricsRegistry::GetMetricsType(const std::string& name)
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278 {
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279 boost::mutex::scoped_lock lock(mutex_);
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280
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281 Content::const_iterator found = content_.find(name);
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282
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283 if (found == content_.end())
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284 {
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285 throw OrthancException(ErrorCode_InexistentItem);
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286 }
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287 else
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288 {
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289 assert(found->second != NULL);
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290 return found->second->GetType();
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291 }
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292 }
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293
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294
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295 void MetricsRegistry::ExportPrometheusText(std::string& s)
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296 {
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297 // https://www.boost.org/doc/libs/1_69_0/doc/html/date_time/examples.html#date_time.examples.seconds_since_epoch
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298 static const boost::posix_time::ptime EPOCH(boost::gregorian::date(1970, 1, 1));
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299
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300 boost::mutex::scoped_lock lock(mutex_);
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301
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302 s.clear();
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303
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304 if (!enabled_)
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305 {
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306 return;
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307 }
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308
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309 ChunkedBuffer buffer;
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310
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311 for (Content::const_iterator it = content_.begin();
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312 it != content_.end(); ++it)
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313 {
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314 assert(it->second != NULL);
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315
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316 if (it->second->HasValue())
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317 {
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318 boost::posix_time::time_duration diff = it->second->GetTime() - EPOCH;
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319
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320 std::string line = (it->first + " " +
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321 boost::lexical_cast<std::string>(it->second->GetValue()) + " " +
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322 boost::lexical_cast<std::string>(diff.total_milliseconds()) + "\n");
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323
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324 buffer.AddChunk(line);
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325 }
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326 }
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327
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328 buffer.Flatten(s);
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329 }
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330
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331
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332 MetricsRegistry::SharedMetrics::SharedMetrics(MetricsRegistry &registry,
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333 const std::string &name,
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334 MetricsType type) :
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335 registry_(registry),
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336 name_(name),
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337 value_(0)
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338 {
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339 }
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340
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341 void MetricsRegistry::SharedMetrics::Add(int64_t delta)
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342 {
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343 boost::mutex::scoped_lock lock(mutex_);
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344 value_ += delta;
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345 registry_.SetValue(name_, value_);
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346 }
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347
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348
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349 MetricsRegistry::ActiveCounter::ActiveCounter(MetricsRegistry::SharedMetrics &metrics) :
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350 metrics_(metrics)
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351 {
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352 metrics_.Add(1);
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353 }
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354
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355 MetricsRegistry::ActiveCounter::~ActiveCounter()
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356 {
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357 metrics_.Add(-1);
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358 }
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359
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360
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361 void MetricsRegistry::Timer::Start()
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362 {
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363 if (registry_.IsEnabled())
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364 {
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365 active_ = true;
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366 start_ = GetNow();
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367 }
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368 else
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369 {
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370 active_ = false;
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371 }
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372 }
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373
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374
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375 MetricsRegistry::Timer::Timer(MetricsRegistry &registry,
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376 const std::string &name) :
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377 registry_(registry),
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378 name_(name),
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379 type_(MetricsType_MaxOver10Seconds)
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380 {
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381 Start();
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382 }
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383
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384
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385 MetricsRegistry::Timer::Timer(MetricsRegistry &registry,
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386 const std::string &name,
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387 MetricsType type) :
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388 registry_(registry),
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389 name_(name),
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390 type_(type)
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391 {
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392 Start();
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393 }
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394
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395
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396 MetricsRegistry::Timer::~Timer()
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397 {
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398 if (active_)
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399 {
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400 boost::posix_time::time_duration diff = GetNow() - start_;
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401 registry_.SetValue(
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402 name_, static_cast<int64_t>(diff.total_milliseconds()), type_);
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403 }
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404 }
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405 }