annotate OrthancServer/Scheduler/ServerScheduler.cpp @ 2064:e92280e63d8d

fix Debian #829608
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 04 Jul 2016 19:07:47 +0200
parents ed383e7a6753
children 29689b30f9ae
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #include "../PrecompiledHeadersServer.h"
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34 #include "ServerScheduler.h"
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35
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36 #include "../../Core/OrthancException.h"
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37 #include "../../Core/Logging.h"
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38
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39 namespace Orthanc
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40 {
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41 namespace
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42 {
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43 // Anonymous namespace to avoid clashes between compilation modules
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44 class Sink : public IServerCommand
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45 {
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46 private:
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47 ListOfStrings& target_;
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48
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49 public:
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50 Sink(ListOfStrings& target) : target_(target)
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51 {
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52 }
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53
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54 virtual bool Apply(ListOfStrings& outputs,
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55 const ListOfStrings& inputs)
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56 {
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57 for (ListOfStrings::const_iterator
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58 it = inputs.begin(); it != inputs.end(); ++it)
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59 {
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60 target_.push_back(*it);
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61 }
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62
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63 return true;
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64 }
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65 };
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66 }
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67
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68
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69 ServerScheduler::JobInfo& ServerScheduler::GetJobInfo(const std::string& jobId)
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70 {
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71 Jobs::iterator info = jobs_.find(jobId);
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72
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73 if (info == jobs_.end())
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74 {
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75 throw OrthancException(ErrorCode_InternalError);
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76 }
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77
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78 return info->second;
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79 }
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80
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81
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82 void ServerScheduler::SignalSuccess(const std::string& jobId)
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83 {
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84 boost::mutex::scoped_lock lock(mutex_);
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85
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86 JobInfo& info = GetJobInfo(jobId);
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87 info.success_++;
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88
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89 assert(info.failures_ == 0);
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90
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91 if (info.success_ >= info.size_)
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92 {
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93 if (info.watched_)
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94 {
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95 watchedJobStatus_[jobId] = JobStatus_Success;
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96 watchedJobFinished_.notify_all();
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97 }
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98
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99 LOG(INFO) << "Job successfully finished (" << info.description_ << ")";
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100 jobs_.erase(jobId);
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101
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102 availableJob_.Release();
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103 }
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104 }
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105
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106
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107 void ServerScheduler::SignalFailure(const std::string& jobId)
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108 {
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109 boost::mutex::scoped_lock lock(mutex_);
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110
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111 JobInfo& info = GetJobInfo(jobId);
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112 info.failures_++;
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113
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114 if (info.success_ + info.failures_ >= info.size_)
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115 {
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116 if (info.watched_)
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117 {
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118 watchedJobStatus_[jobId] = JobStatus_Failure;
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119 watchedJobFinished_.notify_all();
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120 }
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121
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122 LOG(ERROR) << "Job has failed (" << info.description_ << ")";
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123 jobs_.erase(jobId);
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124
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125 availableJob_.Release();
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126 }
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127 }
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128
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129
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130 void ServerScheduler::Worker(ServerScheduler* that)
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131 {
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132 static const int32_t TIMEOUT = 100;
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133
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134 LOG(WARNING) << "The server scheduler has started";
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135
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136 while (!that->finish_)
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137 {
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138 std::auto_ptr<IDynamicObject> object(that->queue_.Dequeue(TIMEOUT));
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139 if (object.get() != NULL)
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140 {
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141 ServerCommandInstance& filter = dynamic_cast<ServerCommandInstance&>(*object);
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142
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143 // Skip the execution of this filter if its parent job has
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144 // previously failed.
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145 bool jobHasFailed;
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146 {
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147 boost::mutex::scoped_lock lock(that->mutex_);
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148 JobInfo& info = that->GetJobInfo(filter.GetJobId());
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149 jobHasFailed = (info.failures_ > 0 || info.cancel_);
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150 }
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151
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152 if (jobHasFailed)
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153 {
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154 that->SignalFailure(filter.GetJobId());
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155 }
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156 else
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157 {
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158 filter.Execute(*that);
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159 }
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160 }
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161 }
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162 }
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163
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164
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165 void ServerScheduler::SubmitInternal(ServerJob& job,
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166 bool watched)
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167 {
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168 availableJob_.Acquire();
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169
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170 boost::mutex::scoped_lock lock(mutex_);
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171
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172 JobInfo info;
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173 info.size_ = job.Submit(queue_, *this);
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174 info.cancel_ = false;
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175 info.success_ = 0;
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176 info.failures_ = 0;
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177 info.description_ = job.GetDescription();
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178 info.watched_ = watched;
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179
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180 assert(info.size_ > 0);
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181
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182 if (watched)
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183 {
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184 watchedJobStatus_[job.GetId()] = JobStatus_Running;
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185 }
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186
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187 jobs_[job.GetId()] = info;
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188
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189 LOG(INFO) << "New job submitted (" << job.description_ << ")";
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190 }
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191
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192
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193 ServerScheduler::ServerScheduler(unsigned int maxJobs) : availableJob_(maxJobs)
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194 {
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195 if (maxJobs == 0)
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196 {
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197 throw OrthancException(ErrorCode_ParameterOutOfRange);
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198 }
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199
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200 finish_ = false;
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201 worker_ = boost::thread(Worker, this);
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202 }
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203
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204
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205 ServerScheduler::~ServerScheduler()
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206 {
1453
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207 if (!finish_)
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208 {
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209 LOG(ERROR) << "INTERNAL ERROR: ServerScheduler::Finalize() should be invoked manually to avoid mess in the destruction order!";
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210 Stop();
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211 }
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212 }
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213
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214
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215 void ServerScheduler::Stop()
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216 {
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217 if (!finish_)
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218 {
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219 finish_ = true;
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220
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221 if (worker_.joinable())
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222 {
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223 worker_.join();
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224 }
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225 }
781
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226 }
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227
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228
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229 void ServerScheduler::Submit(ServerJob& job)
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230 {
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231 if (job.filters_.empty())
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232 {
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233 return;
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234 }
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235
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236 SubmitInternal(job, false);
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237 }
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238
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239
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240 bool ServerScheduler::SubmitAndWait(ListOfStrings& outputs,
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241 ServerJob& job)
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242 {
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243 std::string jobId = job.GetId();
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244
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245 outputs.clear();
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246
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247 if (job.filters_.empty())
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248 {
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249 return true;
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250 }
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251
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252 // Add a sink filter to collect all the results of the filters
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253 // that have no next filter.
1000
13e230bbd882 rename filter to command
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254 ServerCommandInstance& sink = job.AddCommand(new Sink(outputs));
781
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255
1000
13e230bbd882 rename filter to command
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parents: 999
diff changeset
256 for (std::list<ServerCommandInstance*>::iterator
1304
7b6925b0890d cppcheck
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parents: 1288
diff changeset
257 it = job.filters_.begin(); it != job.filters_.end(); ++it)
781
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258 {
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259 if ((*it) != &sink &&
1009
26642cecd36d clearer job interface
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parents: 1000
diff changeset
260 (*it)->IsConnectedToSink())
781
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261 {
1009
26642cecd36d clearer job interface
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diff changeset
262 (*it)->ConnectOutput(sink);
781
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263 }
f0ac3a53ccf2 scheduler
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264 }
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265
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266 // Submit the job
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267 SubmitInternal(job, true);
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268
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269 // Wait for the job to complete (either success or failure)
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270 JobStatus status;
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271
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272 {
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273 boost::mutex::scoped_lock lock(mutex_);
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274
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275 assert(watchedJobStatus_.find(jobId) != watchedJobStatus_.end());
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276
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277 while (watchedJobStatus_[jobId] == JobStatus_Running)
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278 {
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279 watchedJobFinished_.wait(lock);
781
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280 }
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281
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282 status = watchedJobStatus_[jobId];
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283 watchedJobStatus_.erase(jobId);
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284 }
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285
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286 return (status == JobStatus_Success);
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287 }
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288
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289
999
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diff changeset
290 bool ServerScheduler::SubmitAndWait(ServerJob& job)
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diff changeset
291 {
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diff changeset
292 ListOfStrings ignoredSink;
db18c071fbd7 store-scu filter
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293 return SubmitAndWait(ignoredSink, job);
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294 }
db18c071fbd7 store-scu filter
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diff changeset
295
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diff changeset
296
781
f0ac3a53ccf2 scheduler
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297 bool ServerScheduler::IsRunning(const std::string& jobId)
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298 {
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299 boost::mutex::scoped_lock lock(mutex_);
f0ac3a53ccf2 scheduler
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300 return jobs_.find(jobId) != jobs_.end();
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parents:
diff changeset
301 }
f0ac3a53ccf2 scheduler
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parents:
diff changeset
302
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303
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304 void ServerScheduler::Cancel(const std::string& jobId)
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305 {
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306 boost::mutex::scoped_lock lock(mutex_);
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307
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308 Jobs::iterator job = jobs_.find(jobId);
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309
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310 if (job != jobs_.end())
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311 {
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312 job->second.cancel_ = true;
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313 LOG(WARNING) << "Canceling a job (" << job->second.description_ << ")";
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314 }
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315 }
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316
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317
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318 float ServerScheduler::GetProgress(const std::string& jobId)
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319 {
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320 boost::mutex::scoped_lock lock(mutex_);
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321
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322 Jobs::iterator job = jobs_.find(jobId);
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323
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324 if (job == jobs_.end() ||
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325 job->second.size_ == 0 /* should never happen */)
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326 {
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327 // This job is not running
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328 return 1;
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329 }
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330
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331 if (job->second.failures_ != 0)
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332 {
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333 return 1;
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334 }
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335
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336 if (job->second.size_ == 1)
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337 {
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338 return static_cast<float>(job->second.success_);
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339 }
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340
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341 return (static_cast<float>(job->second.success_) /
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342 static_cast<float>(job->second.size_ - 1));
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343 }
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344
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345
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346 void ServerScheduler::GetListOfJobs(ListOfStrings& jobs)
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347 {
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348 boost::mutex::scoped_lock lock(mutex_);
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349
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350 jobs.clear();
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351
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352 for (Jobs::const_iterator
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353 it = jobs_.begin(); it != jobs_.end(); ++it)
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354 {
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355 jobs.push_back(it->first);
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356 }
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357 }
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358 }