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annotate Core/JobsEngine/JobsEngine.cpp @ 2811:7cfc8d266f41

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reason for releasing resources in jobs
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 06 Sep 2018 12:32:02 +0200
parents d26dd081df97
children ea7aea6f6a95
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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) 2017-2018 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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32
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33
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34 #include "../PrecompiledHeaders.h"
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35 #include "JobsEngine.h"
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36
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37 #include "../Logging.h"
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38 #include "../OrthancException.h"
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39
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40 #include <json/reader.h>
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41
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42 namespace Orthanc
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43 {
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44 bool JobsEngine::IsRunning()
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45 {
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46 boost::mutex::scoped_lock lock(stateMutex_);
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47 return (state_ == State_Running);
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48 }
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49
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50
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51 bool JobsEngine::ExecuteStep(JobsRegistry::RunningJob& running,
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52 size_t workerIndex)
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53 {
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54 assert(running.IsValid());
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55
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56 if (running.IsPauseScheduled())
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57 {
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58 running.GetJob().ReleaseResources(JobReleaseReason_Paused);
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59 running.MarkPause();
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60 return false;
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61 }
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62
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63 if (running.IsCancelScheduled())
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64 {
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65 running.GetJob().ReleaseResources(JobReleaseReason_Canceled);
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66 running.MarkCanceled();
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67 return false;
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68 }
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69
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70 JobStepResult result;
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71
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72 try
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73 {
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74 result = running.GetJob().ExecuteStep();
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75 }
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76 catch (OrthancException& e)
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77 {
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78 result = JobStepResult::Failure(e.GetErrorCode());
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79 }
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80 catch (boost::bad_lexical_cast&)
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81 {
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82 result = JobStepResult::Failure(ErrorCode_BadFileFormat);
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83 }
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84 catch (...)
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85 {
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86 result = JobStepResult::Failure(ErrorCode_InternalError);
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87 }
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88
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89 switch (result.GetCode())
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90 {
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91 case JobStepCode_Success:
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92 running.GetJob().ReleaseResources(JobReleaseReason_Success);
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93 running.UpdateStatus(ErrorCode_Success);
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94 running.MarkSuccess();
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95 return false;
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96
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97 case JobStepCode_Failure:
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98 running.GetJob().ReleaseResources(JobReleaseReason_Failure);
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99 running.UpdateStatus(result.GetFailureCode());
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100 running.MarkFailure();
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101 return false;
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102
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103 case JobStepCode_Retry:
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104 running.GetJob().ReleaseResources(JobReleaseReason_Retry);
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105 running.UpdateStatus(ErrorCode_Success);
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106 running.MarkRetry(result.GetRetryTimeout());
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107 return false;
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108
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109 case JobStepCode_Continue:
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110 running.UpdateStatus(ErrorCode_Success);
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111 return true;
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112
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113 default:
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114 throw OrthancException(ErrorCode_InternalError);
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115 }
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116 }
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117
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118
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119 void JobsEngine::RetryHandler(JobsEngine* engine)
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120 {
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121 assert(engine != NULL);
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122
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123 while (engine->IsRunning())
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124 {
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125 boost::this_thread::sleep(boost::posix_time::milliseconds(engine->threadSleep_));
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126 engine->GetRegistry().ScheduleRetries();
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127 }
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128 }
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129
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130
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131 void JobsEngine::Worker(JobsEngine* engine,
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132 size_t workerIndex)
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133 {
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134 assert(engine != NULL);
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135
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136 LOG(INFO) << "Worker thread " << workerIndex << " has started";
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137
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138 while (engine->IsRunning())
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139 {
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140 JobsRegistry::RunningJob running(engine->GetRegistry(), engine->threadSleep_);
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141
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142 if (running.IsValid())
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143 {
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144 LOG(INFO) << "Executing job with priority " << running.GetPriority()
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145 << " in worker thread " << workerIndex << ": " << running.GetId();
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146
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147 while (engine->IsRunning())
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148 {
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149 if (!engine->ExecuteStep(running, workerIndex))
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150 {
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151 break;
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152 }
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153 }
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154 }
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155 }
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156 }
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157
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158
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159 JobsEngine::JobsEngine() :
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160 state_(State_Setup),
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161 registry_(new JobsRegistry),
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162 threadSleep_(200),
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163 workers_(1)
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164 {
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165 }
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166
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167
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168 JobsEngine::~JobsEngine()
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169 {
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170 if (state_ != State_Setup &&
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171 state_ != State_Done)
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172 {
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173 LOG(ERROR) << "INTERNAL ERROR: JobsEngine::Stop() should be invoked manually to avoid mess in the destruction order!";
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174 Stop();
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175 }
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176 }
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177
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178
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179 JobsRegistry& JobsEngine::GetRegistry()
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180 {
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181 if (registry_.get() == NULL)
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182 {
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183 throw OrthancException(ErrorCode_InternalError);
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184 }
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185
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186 return *registry_;
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187 }
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188
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189
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190 void JobsEngine::LoadRegistryFromJson(IJobUnserializer& unserializer,
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191 const Json::Value& serialized)
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192 {
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193 boost::mutex::scoped_lock lock(stateMutex_);
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194
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195 if (state_ != State_Setup)
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196 {
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197 // Can only be invoked before calling "Start()"
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198 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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199 }
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200
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201 registry_.reset(new JobsRegistry(unserializer, serialized));
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202 }
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203
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204
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205 void JobsEngine::LoadRegistryFromString(IJobUnserializer& unserializer,
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206 const std::string& serialized)
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207 {
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208 Json::Value value;
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209 Json::Reader reader;
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210 if (reader.parse(serialized, value))
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211 {
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212 LoadRegistryFromJson(unserializer, value);
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213 }
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214 else
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215 {
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216 throw OrthancException(ErrorCode_BadFileFormat);
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217 }
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218 }
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219
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220
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221 void JobsEngine::SetWorkersCount(size_t count)
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222 {
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223 boost::mutex::scoped_lock lock(stateMutex_);
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224
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225 if (state_ != State_Setup)
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226 {
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227 // Can only be invoked before calling "Start()"
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228 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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229 }
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230
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231 workers_.resize(count);
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232 }
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233
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234
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235 void JobsEngine::SetThreadSleep(unsigned int sleep)
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236 {
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237 boost::mutex::scoped_lock lock(stateMutex_);
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238
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239 if (state_ != State_Setup)
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240 {
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241 // Can only be invoked before calling "Start()"
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242 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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243 }
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244
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245 threadSleep_ = sleep;
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246 }
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247
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248
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249 void JobsEngine::Start()
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250 {
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251 boost::mutex::scoped_lock lock(stateMutex_);
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252
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253 if (state_ != State_Setup)
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254 {
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255 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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256 }
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257
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258 retryHandler_ = boost::thread(RetryHandler, this);
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259
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260 if (workers_.size() == 0)
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261 {
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262 // Use all the available CPUs
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263 size_t n = boost::thread::hardware_concurrency();
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264
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265 if (n == 0)
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266 {
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267 n = 1;
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268 }
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269
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270 workers_.resize(n);
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271 }
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272
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273 for (size_t i = 0; i < workers_.size(); i++)
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274 {
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275 assert(workers_[i] == NULL);
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276 workers_[i] = new boost::thread(Worker, this, i);
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277 }
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278
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279 state_ = State_Running;
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280
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281 LOG(WARNING) << "The jobs engine has started with " << workers_.size() << " threads";
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282 }
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283
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284
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285 void JobsEngine::Stop()
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286 {
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287 {
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288 boost::mutex::scoped_lock lock(stateMutex_);
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289
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290 if (state_ != State_Running)
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diff changeset
291 {
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292 return;
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293 }
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294
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diff changeset
295 state_ = State_Stopping;
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296 }
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297
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298 LOG(INFO) << "Stopping the jobs engine";
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299
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300 if (retryHandler_.joinable())
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301 {
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302 retryHandler_.join();
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303 }
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304
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305 for (size_t i = 0; i < workers_.size(); i++)
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306 {
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307 assert(workers_[i] != NULL);
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308
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309 if (workers_[i]->joinable())
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310 {
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311 workers_[i]->join();
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312 }
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313
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314 delete workers_[i];
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315 }
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316
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317 {
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318 boost::mutex::scoped_lock lock(stateMutex_);
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319 state_ = State_Done;
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320 }
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321
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322 LOG(WARNING) << "The jobs engine has stopped";
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323 }
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324 }