annotate OrthancFramework/Sources/MultiThreading/RunnableWorkersPool.cpp @ 5111:7547c7dfd017

/tools/metrics-prometheus: added orthanc_last_change and orthanc_up_time_s
author Alain Mazy <am@osimis.io>
date Tue, 22 Nov 2022 18:01:23 +0100
parents 43e613a7756b
children 0ea402b4d901
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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) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 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 "RunnableWorkersPool.h"
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26
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27 #include "SharedMessageQueue.h"
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28 #include "../Compatibility.h"
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29 #include "../OrthancException.h"
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30 #include "../Logging.h"
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31
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32 namespace Orthanc
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33 {
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34 struct RunnableWorkersPool::PImpl
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35 {
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36 class Worker
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37 {
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38 private:
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39 const bool& continue_;
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40 SharedMessageQueue& queue_;
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41 boost::thread thread_;
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42
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43 static void WorkerThread(Worker* that)
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44 {
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45 while (that->continue_)
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46 {
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47 try
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48 {
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49 std::unique_ptr<IDynamicObject> obj(that->queue_.Dequeue(100));
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50 if (obj.get() != NULL)
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51 {
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52 IRunnableBySteps& runnable = *dynamic_cast<IRunnableBySteps*>(obj.get());
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53
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54 bool wishToContinue = runnable.Step();
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55
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56 if (wishToContinue)
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57 {
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58 // The runnable wishes to continue, reinsert it at the beginning of the queue
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59 that->queue_.Enqueue(obj.release());
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60 }
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61 }
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62 }
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63 catch (OrthancException& e)
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64 {
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65 LOG(ERROR) << "Exception while handling some runnable object: " << e.What();
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66 }
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67 catch (std::bad_alloc&)
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68 {
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69 LOG(ERROR) << "Not enough memory to handle some runnable object";
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70 }
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71 catch (std::exception& e)
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72 {
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73 LOG(ERROR) << "std::exception while handling some runnable object: " << e.what();
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74 }
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75 catch (...)
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76 {
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77 LOG(ERROR) << "Native exception while handling some runnable object";
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78 }
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79 }
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80 }
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81
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82 public:
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83 Worker(const bool& globalContinue,
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84 SharedMessageQueue& queue) :
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85 continue_(globalContinue),
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86 queue_(queue)
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87 {
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88 thread_ = boost::thread(WorkerThread, this);
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89 }
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90
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91 void Join()
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92 {
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93 if (thread_.joinable())
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94 {
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95 thread_.join();
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96 }
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97 }
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98 };
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99
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100
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101 bool continue_;
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102 std::vector<Worker*> workers_;
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103 SharedMessageQueue queue_;
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104 };
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105
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106
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107
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108 RunnableWorkersPool::RunnableWorkersPool(size_t countWorkers) : pimpl_(new PImpl)
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109 {
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110 pimpl_->continue_ = true;
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111
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112 if (countWorkers == 0)
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113 {
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114 throw OrthancException(ErrorCode_ParameterOutOfRange);
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115 }
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116
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117 pimpl_->workers_.resize(countWorkers);
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118
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119 for (size_t i = 0; i < countWorkers; i++)
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120 {
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121 pimpl_->workers_[i] = new PImpl::Worker(pimpl_->continue_, pimpl_->queue_);
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122 }
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123 }
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124
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125
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126 void RunnableWorkersPool::Stop()
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127 {
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128 if (pimpl_->continue_)
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129 {
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130 pimpl_->continue_ = false;
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131
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132 for (size_t i = 0; i < pimpl_->workers_.size(); i++)
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133 {
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134 PImpl::Worker* worker = pimpl_->workers_[i];
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135
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136 if (worker != NULL)
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137 {
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138 worker->Join();
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139 delete worker;
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140 }
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141 }
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142 }
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143 }
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144
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145
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146 RunnableWorkersPool::~RunnableWorkersPool()
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147 {
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148 Stop();
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149 }
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150
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151
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152 void RunnableWorkersPool::Add(IRunnableBySteps* runnable)
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153 {
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154 if (!pimpl_->continue_)
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155 {
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156 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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157 }
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158
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159 pimpl_->queue_.Enqueue(runnable);
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160 }
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161 }