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annotate OrthancFramework/Sources/JobsEngine/JobsEngine.cpp @ 4119:bf7b9edf6b81 framework-lgpl

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re-licensing the OrthancFramework to LGPL, in order to license Stone of Orthanc under LGPL
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 07 Jul 2020 19:17:56 +0200
parents d25f4c0fa160
children 90f91b78d708
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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) 2017-2020 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 Lesser General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Lesser General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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21
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22
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23 #include "../PrecompiledHeaders.h"
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24 #include "JobsEngine.h"
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25
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26 #include "../Logging.h"
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27 #include "../OrthancException.h"
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28
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29 #include <json/reader.h>
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30
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31 namespace Orthanc
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32 {
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33 bool JobsEngine::IsRunning()
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34 {
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35 boost::mutex::scoped_lock lock(stateMutex_);
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36 return (state_ == State_Running);
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37 }
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38
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39
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40 bool JobsEngine::ExecuteStep(JobsRegistry::RunningJob& running,
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41 size_t workerIndex)
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42 {
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43 assert(running.IsValid());
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44
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45 if (running.IsPauseScheduled())
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46 {
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47 running.GetJob().Stop(JobStopReason_Paused);
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48 running.MarkPause();
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49 return false;
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50 }
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51
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52 if (running.IsCancelScheduled())
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53 {
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54 running.GetJob().Stop(JobStopReason_Canceled);
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55 running.MarkCanceled();
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56 return false;
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57 }
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58
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59 JobStepResult result;
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60
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61 try
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62 {
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63 result = running.GetJob().Step(running.GetId());
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64 }
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65 catch (OrthancException& e)
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66 {
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67 result = JobStepResult::Failure(e);
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68 }
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69 catch (boost::bad_lexical_cast&)
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70 {
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71 result = JobStepResult::Failure(ErrorCode_BadFileFormat, NULL);
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72 }
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73 catch (...)
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74 {
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75 result = JobStepResult::Failure(ErrorCode_InternalError, NULL);
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76 }
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77
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78 switch (result.GetCode())
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79 {
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80 case JobStepCode_Success:
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81 running.GetJob().Stop(JobStopReason_Success);
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82 running.UpdateStatus(ErrorCode_Success, "");
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83 running.MarkSuccess();
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84 return false;
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85
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86 case JobStepCode_Failure:
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87 running.GetJob().Stop(JobStopReason_Failure);
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88 running.UpdateStatus(result.GetFailureCode(), result.GetFailureDetails());
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89 running.MarkFailure();
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90 return false;
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91
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92 case JobStepCode_Retry:
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93 running.GetJob().Stop(JobStopReason_Retry);
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94 running.UpdateStatus(ErrorCode_Success, "");
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95 running.MarkRetry(result.GetRetryTimeout());
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96 return false;
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97
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98 case JobStepCode_Continue:
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99 running.UpdateStatus(ErrorCode_Success, "");
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100 return true;
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101
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102 default:
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103 throw OrthancException(ErrorCode_InternalError);
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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 void JobsEngine::RetryHandler(JobsEngine* engine)
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109 {
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110 assert(engine != NULL);
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111
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112 while (engine->IsRunning())
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113 {
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114 boost::this_thread::sleep(boost::posix_time::milliseconds(engine->threadSleep_));
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115 engine->GetRegistry().ScheduleRetries();
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116 }
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117 }
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118
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119
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120 void JobsEngine::Worker(JobsEngine* engine,
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121 size_t workerIndex)
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122 {
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123 assert(engine != NULL);
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124
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125 LOG(INFO) << "Worker thread " << workerIndex << " has started";
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126
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127 while (engine->IsRunning())
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128 {
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129 JobsRegistry::RunningJob running(engine->GetRegistry(), engine->threadSleep_);
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130
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131 if (running.IsValid())
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132 {
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133 LOG(INFO) << "Executing job with priority " << running.GetPriority()
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134 << " in worker thread " << workerIndex << ": " << running.GetId();
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135
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136 while (engine->IsRunning())
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137 {
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138 if (!engine->ExecuteStep(running, workerIndex))
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139 {
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140 break;
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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
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147
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148 JobsEngine::JobsEngine(size_t maxCompletedJobs) :
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149 state_(State_Setup),
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150 registry_(new JobsRegistry(maxCompletedJobs)),
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151 threadSleep_(200),
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152 workers_(1)
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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 JobsEngine::~JobsEngine()
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158 {
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159 if (state_ != State_Setup &&
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160 state_ != State_Done)
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161 {
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162 LOG(ERROR) << "INTERNAL ERROR: JobsEngine::Stop() should be invoked manually to avoid mess in the destruction order!";
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163 Stop();
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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 JobsRegistry& JobsEngine::GetRegistry()
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169 {
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170 if (registry_.get() == NULL)
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171 {
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172 throw OrthancException(ErrorCode_InternalError);
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173 }
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174
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175 return *registry_;
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176 }
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177
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178
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179 void JobsEngine::LoadRegistryFromJson(IJobUnserializer& unserializer,
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180 const Json::Value& serialized)
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181 {
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182 boost::mutex::scoped_lock lock(stateMutex_);
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183
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184 if (state_ != State_Setup)
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185 {
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186 // Can only be invoked before calling "Start()"
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187 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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188 }
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189
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190 assert(registry_.get() != NULL);
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191 const size_t maxCompletedJobs = registry_->GetMaxCompletedJobs();
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192 registry_.reset(new JobsRegistry(unserializer, serialized, maxCompletedJobs));
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193 }
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194
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195
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196 void JobsEngine::LoadRegistryFromString(IJobUnserializer& unserializer,
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197 const std::string& serialized)
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198 {
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199 Json::Value value;
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200 Json::Reader reader;
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201 if (reader.parse(serialized, value))
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202 {
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203 LoadRegistryFromJson(unserializer, value);
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204 }
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205 else
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206 {
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207 throw OrthancException(ErrorCode_BadFileFormat);
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208 }
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209 }
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210
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211
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212 void JobsEngine::SetWorkersCount(size_t count)
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213 {
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214 boost::mutex::scoped_lock lock(stateMutex_);
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215
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216 if (state_ != State_Setup)
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217 {
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218 // Can only be invoked before calling "Start()"
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219 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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220 }
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221
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222 workers_.resize(count);
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223 }
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224
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225
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226 void JobsEngine::SetThreadSleep(unsigned int sleep)
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227 {
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228 boost::mutex::scoped_lock lock(stateMutex_);
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229
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230 if (state_ != State_Setup)
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231 {
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232 // Can only be invoked before calling "Start()"
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233 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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234 }
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235
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236 threadSleep_ = sleep;
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237 }
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238
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239
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240 void JobsEngine::Start()
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241 {
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242 boost::mutex::scoped_lock lock(stateMutex_);
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243
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244 if (state_ != State_Setup)
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245 {
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246 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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247 }
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248
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249 retryHandler_ = boost::thread(RetryHandler, this);
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250
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251 if (workers_.size() == 0)
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252 {
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253 // Use all the available CPUs
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254 size_t n = boost::thread::hardware_concurrency();
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255
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256 if (n == 0)
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257 {
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258 n = 1;
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259 }
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260
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diff changeset
261 workers_.resize(n);
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262 }
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263
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264 for (size_t i = 0; i < workers_.size(); i++)
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265 {
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266 assert(workers_[i] == NULL);
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267 workers_[i] = new boost::thread(Worker, this, i);
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268 }
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269
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diff changeset
270 state_ = State_Running;
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271
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272 LOG(WARNING) << "The jobs engine has started with " << workers_.size() << " threads";
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273 }
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274
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275
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276 void JobsEngine::Stop()
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277 {
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278 {
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diff changeset
279 boost::mutex::scoped_lock lock(stateMutex_);
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280
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281 if (state_ != State_Running)
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282 {
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283 return;
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284 }
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285
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diff changeset
286 state_ = State_Stopping;
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287 }
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diff changeset
288
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289 LOG(INFO) << "Stopping the jobs engine";
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290
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diff changeset
291 if (retryHandler_.joinable())
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diff changeset
292 {
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293 retryHandler_.join();
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294 }
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295
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296 for (size_t i = 0; i < workers_.size(); i++)
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297 {
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298 assert(workers_[i] != NULL);
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299
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300 if (workers_[i]->joinable())
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301 {
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302 workers_[i]->join();
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303 }
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304
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305 delete workers_[i];
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306 }
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307
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308 {
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309 boost::mutex::scoped_lock lock(stateMutex_);
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310 state_ = State_Done;
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311 }
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312
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313 LOG(WARNING) << "The jobs engine has stopped";
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314 }
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315 }