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annotate OrthancFramework/Sources/MetricsRegistry.cpp @ 5326:fbe857e942cd

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store metrics as integers instead of floats to avoid precision loss in increments
author Sebastien Jodogne <s.jodogne@gmail.com>
date Sun, 25 Jun 2023 18:28:49 +0200
parents 9c00e832985f
children c103b0e70d75
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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 Touch(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 void Touch(int64_t value)
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55 {
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56 Touch(value, GetNow());
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57 }
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58
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59 void UpdateMax(int64_t value,
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60 int duration)
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61 {
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62 if (hasValue_)
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63 {
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64 const boost::posix_time::ptime now = GetNow();
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65
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66 if (value > value_ ||
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67 (now - time_).total_seconds() > duration)
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68 {
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69 Touch(value, now);
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70 }
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71 }
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72 else
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73 {
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74 Touch(value);
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75 }
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76 }
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77
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78 void UpdateMin(int64_t value,
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79 int duration)
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80 {
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81 if (hasValue_)
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82 {
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83 const boost::posix_time::ptime now = GetNow();
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84
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85 if (value < value_ ||
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86 (now - time_).total_seconds() > duration)
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87 {
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88 Touch(value, now);
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89 }
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90 }
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91 else
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92 {
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93 Touch(value);
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94 }
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95 }
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96
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97 public:
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98 explicit Item(MetricsType type) :
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99 type_(type),
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100 hasValue_(false),
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101 value_(0)
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102 {
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103 }
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104
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105 MetricsType GetType() const
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106 {
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107 return type_;
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108 }
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109
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110 void Update(int64_t value)
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111 {
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112 switch (type_)
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113 {
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114 case MetricsType_Default:
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115 Touch(value);
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116 break;
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117
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118 case MetricsType_MaxOver10Seconds:
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119 UpdateMax(value, 10);
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120 break;
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121
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122 case MetricsType_MaxOver1Minute:
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123 UpdateMax(value, 60);
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124 break;
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125
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126 case MetricsType_MinOver10Seconds:
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127 UpdateMin(value, 10);
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128 break;
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129
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130 case MetricsType_MinOver1Minute:
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131 UpdateMin(value, 60);
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132 break;
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133
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134 default:
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135 throw OrthancException(ErrorCode_NotImplemented);
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Sebastien Jodogne <s.jodogne@gmail.com>
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136 }
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Sebastien Jodogne <s.jodogne@gmail.com>
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137 }
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138
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Sebastien Jodogne <s.jodogne@gmail.com>
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139 bool HasValue() const
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140 {
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141 return hasValue_;
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142 }
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143
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144 const boost::posix_time::ptime& GetTime() const
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145 {
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146 if (hasValue_)
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147 {
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148 return time_;
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149 }
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150 else
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151 {
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152 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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153 }
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154 }
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155
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156 int64_t GetValue() const
3174
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157 {
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158 if (hasValue_)
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159 {
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160 return value_;
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161 }
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162 else
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163 {
8ea7c4546c3a primitives to collect metrics in Orthanc
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164 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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165 }
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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 MetricsRegistry::~MetricsRegistry()
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171 {
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172 for (Content::iterator it = content_.begin(); it != content_.end(); ++it)
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173 {
8ea7c4546c3a primitives to collect metrics in Orthanc
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174 assert(it->second != NULL);
8ea7c4546c3a primitives to collect metrics in Orthanc
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175 delete it->second;
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176 }
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177 }
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178
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179 bool MetricsRegistry::IsEnabled() const
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180 {
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181 return enabled_;
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182 }
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183
3174
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184
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185 void MetricsRegistry::SetEnabled(bool enabled)
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186 {
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diff changeset
187 boost::mutex::scoped_lock lock(mutex_);
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188 enabled_ = enabled;
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189 }
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190
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diff changeset
191
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diff changeset
192 void MetricsRegistry::Register(const std::string& name,
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193 MetricsType type)
8ea7c4546c3a primitives to collect metrics in Orthanc
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diff changeset
194 {
8ea7c4546c3a primitives to collect metrics in Orthanc
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diff changeset
195 boost::mutex::scoped_lock lock(mutex_);
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parents:
diff changeset
196
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diff changeset
197 Content::iterator found = content_.find(name);
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parents:
diff changeset
198
8ea7c4546c3a primitives to collect metrics in Orthanc
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diff changeset
199 if (found == content_.end())
8ea7c4546c3a primitives to collect metrics in Orthanc
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
200 {
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
201 content_[name] = new Item(type);
8ea7c4546c3a primitives to collect metrics in Orthanc
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
202 }
8ea7c4546c3a primitives to collect metrics in Orthanc
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
203 else
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
204 {
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
205 assert(found->second != NULL);
8ea7c4546c3a primitives to collect metrics in Orthanc
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
206
8ea7c4546c3a primitives to collect metrics in Orthanc
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diff changeset
207 // This metrics already exists: Only recreate it if there is a
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
208 // mismatch in the type of metrics
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
209 if (found->second->GetType() != type)
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diff changeset
210 {
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
211 delete found->second;
8ea7c4546c3a primitives to collect metrics in Orthanc
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
212 found->second = new Item(type);
8ea7c4546c3a primitives to collect metrics in Orthanc
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
213 }
8ea7c4546c3a primitives to collect metrics in Orthanc
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
214 }
8ea7c4546c3a primitives to collect metrics in Orthanc
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
215 }
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
216
5325
9c00e832985f refactoring MetricsRegistry
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parents: 5185
diff changeset
217
9c00e832985f refactoring MetricsRegistry
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diff changeset
218 MetricsRegistry::Item& MetricsRegistry::GetItemInternal(const std::string& name,
9c00e832985f refactoring MetricsRegistry
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parents: 5185
diff changeset
219 MetricsType type)
3174
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
220 {
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
221 Content::iterator found = content_.find(name);
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
222
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parents:
diff changeset
223 if (found == content_.end())
8ea7c4546c3a primitives to collect metrics in Orthanc
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
224 {
5325
9c00e832985f refactoring MetricsRegistry
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diff changeset
225 Item* item = new Item(type);
9c00e832985f refactoring MetricsRegistry
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parents: 5185
diff changeset
226 content_[name] = item;
9c00e832985f refactoring MetricsRegistry
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diff changeset
227 return *item;
3174
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
228 }
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
229 else
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
230 {
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
231 assert(found->second != NULL);
5325
9c00e832985f refactoring MetricsRegistry
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diff changeset
232 return *found->second;
3174
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
233 }
8ea7c4546c3a primitives to collect metrics in Orthanc
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parents:
diff changeset
234 }
8ea7c4546c3a primitives to collect metrics in Orthanc
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diff changeset
235
4300
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diff changeset
236 MetricsRegistry::MetricsRegistry() :
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diff changeset
237 enabled_(true)
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diff changeset
238 {
b30a8de92ad9 abi continued
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parents: 4203
diff changeset
239 }
b30a8de92ad9 abi continued
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diff changeset
240
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diff changeset
241
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diff changeset
242 void MetricsRegistry::SetValue(const std::string &name,
5326
fbe857e942cd store metrics as integers instead of floats to avoid precision loss in increments
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 5325
diff changeset
243 int64_t value,
4300
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diff changeset
244 MetricsType type)
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diff changeset
245 {
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diff changeset
246 // Inlining to avoid loosing time if metrics are disabled
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diff changeset
247 if (enabled_)
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diff changeset
248 {
5325
9c00e832985f refactoring MetricsRegistry
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diff changeset
249 boost::mutex::scoped_lock lock(mutex_);
9c00e832985f refactoring MetricsRegistry
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diff changeset
250 GetItemInternal(name, type).Update(value);
4300
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diff changeset
251 }
b30a8de92ad9 abi continued
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parents: 4203
diff changeset
252 }
b30a8de92ad9 abi continued
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diff changeset
253
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diff changeset
254
5325
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diff changeset
255 void MetricsRegistry::IncrementValue(const std::string &name,
5326
fbe857e942cd store metrics as integers instead of floats to avoid precision loss in increments
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parents: 5325
diff changeset
256 int64_t delta)
4300
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diff changeset
257 {
5325
9c00e832985f refactoring MetricsRegistry
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diff changeset
258 // Inlining to avoid loosing time if metrics are disabled
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diff changeset
259 if (enabled_)
9c00e832985f refactoring MetricsRegistry
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diff changeset
260 {
9c00e832985f refactoring MetricsRegistry
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parents: 5185
diff changeset
261 boost::mutex::scoped_lock lock(mutex_);
9c00e832985f refactoring MetricsRegistry
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parents: 5185
diff changeset
262 Item& item = GetItemInternal(name, MetricsType_Default);
9c00e832985f refactoring MetricsRegistry
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diff changeset
263
9c00e832985f refactoring MetricsRegistry
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diff changeset
264 if (item.HasValue())
9c00e832985f refactoring MetricsRegistry
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diff changeset
265 {
9c00e832985f refactoring MetricsRegistry
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diff changeset
266 item.Update(item.GetValue() + delta);
9c00e832985f refactoring MetricsRegistry
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diff changeset
267 }
9c00e832985f refactoring MetricsRegistry
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diff changeset
268 else
9c00e832985f refactoring MetricsRegistry
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diff changeset
269 {
9c00e832985f refactoring MetricsRegistry
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diff changeset
270 item.Update(delta);
9c00e832985f refactoring MetricsRegistry
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diff changeset
271 }
9c00e832985f refactoring MetricsRegistry
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diff changeset
272 }
4300
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diff changeset
273 }
b30a8de92ad9 abi continued
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diff changeset
274
3174
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parents:
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275
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276 MetricsType MetricsRegistry::GetMetricsType(const std::string& name)
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277 {
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278 boost::mutex::scoped_lock lock(mutex_);
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279
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280 Content::const_iterator found = content_.find(name);
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281
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282 if (found == content_.end())
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283 {
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284 throw OrthancException(ErrorCode_InexistentItem);
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285 }
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286 else
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287 {
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288 assert(found->second != NULL);
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289 return found->second->GetType();
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290 }
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291 }
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292
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293
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294 void MetricsRegistry::ExportPrometheusText(std::string& s)
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295 {
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296 // 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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297 static const boost::posix_time::ptime EPOCH(boost::gregorian::date(1970, 1, 1));
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298
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299 boost::mutex::scoped_lock lock(mutex_);
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300
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301 s.clear();
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302
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303 if (!enabled_)
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304 {
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305 return;
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306 }
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307
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308 ChunkedBuffer buffer;
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309
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310 for (Content::const_iterator it = content_.begin();
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311 it != content_.end(); ++it)
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312 {
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313 assert(it->second != NULL);
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314
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315 if (it->second->HasValue())
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316 {
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317 boost::posix_time::time_duration diff = it->second->GetTime() - EPOCH;
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318
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319 std::string line = (it->first + " " +
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320 boost::lexical_cast<std::string>(it->second->GetValue()) + " " +
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321 boost::lexical_cast<std::string>(diff.total_milliseconds()) + "\n");
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322
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323 buffer.AddChunk(line);
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324 }
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325 }
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326
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327 buffer.Flatten(s);
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328 }
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329
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330
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331 MetricsRegistry::SharedMetrics::SharedMetrics(MetricsRegistry &registry,
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332 const std::string &name,
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333 MetricsType type) :
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334 registry_(registry),
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335 name_(name),
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336 value_(0)
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337 {
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338 }
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339
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340 void MetricsRegistry::SharedMetrics::Add(int64_t delta)
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341 {
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342 boost::mutex::scoped_lock lock(mutex_);
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343 value_ += delta;
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344 registry_.SetValue(name_, value_);
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345 }
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346
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347
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348 MetricsRegistry::ActiveCounter::ActiveCounter(MetricsRegistry::SharedMetrics &metrics) :
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349 metrics_(metrics)
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350 {
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351 metrics_.Add(1);
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352 }
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353
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354 MetricsRegistry::ActiveCounter::~ActiveCounter()
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355 {
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356 metrics_.Add(-1);
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357 }
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358
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359
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360 void MetricsRegistry::Timer::Start()
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361 {
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362 if (registry_.IsEnabled())
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363 {
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364 active_ = true;
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365 start_ = GetNow();
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366 }
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367 else
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368 {
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369 active_ = false;
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370 }
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371 }
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372
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373
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374 MetricsRegistry::Timer::Timer(MetricsRegistry &registry,
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375 const std::string &name) :
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376 registry_(registry),
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377 name_(name),
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378 type_(MetricsType_MaxOver10Seconds)
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379 {
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380 Start();
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381 }
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382
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diff changeset
383
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diff changeset
384 MetricsRegistry::Timer::Timer(MetricsRegistry &registry,
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385 const std::string &name,
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386 MetricsType type) :
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387 registry_(registry),
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388 name_(name),
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389 type_(type)
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390 {
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391 Start();
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392 }
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diff changeset
393
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diff changeset
394
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diff changeset
395 MetricsRegistry::Timer::~Timer()
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diff changeset
396 {
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397 if (active_)
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398 {
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diff changeset
399 boost::posix_time::time_duration diff = GetNow() - start_;
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diff changeset
400 registry_.SetValue(
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diff changeset
401 name_, static_cast<int64_t>(diff.total_milliseconds()), type_);
3174
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diff changeset
402 }
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parents:
diff changeset
403 }
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parents:
diff changeset
404 }