annotate OrthancServer/Scheduler/ServerScheduler.cpp @ 1534:95b3b0260240

Options to validate peers against CA certificates in HTTPS requests
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 13 Aug 2015 12:42:32 +0200
parents f967bdf8534e
children 33d34bc4ac15
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2015 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 "ServerScheduler.h"
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34
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35 #include "../../Core/OrthancException.h"
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36 #include "../../Core/Logging.h"
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37
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38 namespace Orthanc
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39 {
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40 namespace
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41 {
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42 // Anonymous namespace to avoid clashes between compilation modules
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43 class Sink : public IServerCommand
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44 {
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45 private:
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46 ListOfStrings& target_;
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47
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48 public:
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49 Sink(ListOfStrings& target) : target_(target)
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50 {
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51 }
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52
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53 virtual bool Apply(ListOfStrings& outputs,
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54 const ListOfStrings& inputs)
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55 {
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56 for (ListOfStrings::const_iterator
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57 it = inputs.begin(); it != inputs.end(); ++it)
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58 {
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59 target_.push_back(*it);
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60 }
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61
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62 return true;
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63 }
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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 ServerScheduler::JobInfo& ServerScheduler::GetJobInfo(const std::string& jobId)
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69 {
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70 Jobs::iterator info = jobs_.find(jobId);
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71
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72 if (info == jobs_.end())
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73 {
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74 throw OrthancException(ErrorCode_InternalError);
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75 }
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76
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77 return info->second;
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78 }
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79
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80
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81 void ServerScheduler::SignalSuccess(const std::string& jobId)
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82 {
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83 boost::mutex::scoped_lock lock(mutex_);
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84
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85 JobInfo& info = GetJobInfo(jobId);
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86 info.success_++;
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87
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88 assert(info.failures_ == 0);
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89
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90 if (info.success_ >= info.size_)
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91 {
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92 if (info.watched_)
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93 {
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94 watchedJobStatus_[jobId] = JobStatus_Success;
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95 watchedJobFinished_.notify_all();
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96 }
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97
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98 LOG(INFO) << "Job successfully finished (" << info.description_ << ")";
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99 jobs_.erase(jobId);
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100
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101 availableJob_.Release();
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102 }
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103 }
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104
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105
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106 void ServerScheduler::SignalFailure(const std::string& jobId)
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107 {
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108 boost::mutex::scoped_lock lock(mutex_);
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109
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110 JobInfo& info = GetJobInfo(jobId);
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111 info.failures_++;
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112
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113 if (info.success_ + info.failures_ >= info.size_)
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114 {
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115 if (info.watched_)
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116 {
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117 watchedJobStatus_[jobId] = JobStatus_Failure;
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118 watchedJobFinished_.notify_all();
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119 }
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120
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121 LOG(ERROR) << "Job has failed (" << info.description_ << ")";
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122 jobs_.erase(jobId);
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123
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124 availableJob_.Release();
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125 }
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126 }
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127
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128
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129 void ServerScheduler::Worker(ServerScheduler* that)
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130 {
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131 static const int32_t TIMEOUT = 100;
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132
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133 LOG(WARNING) << "The server scheduler has started";
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134
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135 while (!that->finish_)
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136 {
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137 std::auto_ptr<IDynamicObject> object(that->queue_.Dequeue(TIMEOUT));
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138 if (object.get() != NULL)
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139 {
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140 ServerCommandInstance& filter = dynamic_cast<ServerCommandInstance&>(*object);
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141
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142 // Skip the execution of this filter if its parent job has
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143 // previously failed.
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144 bool jobHasFailed;
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145 {
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146 boost::mutex::scoped_lock lock(that->mutex_);
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147 JobInfo& info = that->GetJobInfo(filter.GetJobId());
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148 jobHasFailed = (info.failures_ > 0 || info.cancel_);
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149 }
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150
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151 if (jobHasFailed)
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152 {
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153 that->SignalFailure(filter.GetJobId());
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154 }
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155 else
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156 {
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157 filter.Execute(*that);
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158 }
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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 void ServerScheduler::SubmitInternal(ServerJob& job,
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165 bool watched)
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166 {
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167 availableJob_.Acquire();
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168
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169 boost::mutex::scoped_lock lock(mutex_);
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170
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171 JobInfo info;
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172 info.size_ = job.Submit(queue_, *this);
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173 info.cancel_ = false;
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174 info.success_ = 0;
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175 info.failures_ = 0;
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176 info.description_ = job.GetDescription();
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177 info.watched_ = watched;
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178
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179 assert(info.size_ > 0);
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180
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181 if (watched)
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182 {
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183 watchedJobStatus_[job.GetId()] = JobStatus_Running;
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184 }
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185
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186 jobs_[job.GetId()] = info;
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187
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188 LOG(INFO) << "New job submitted (" << job.description_ << ")";
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189 }
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190
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191
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192 ServerScheduler::ServerScheduler(unsigned int maxJobs) : availableJob_(maxJobs)
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193 {
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194 finish_ = false;
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195 worker_ = boost::thread(Worker, this);
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196 }
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197
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198
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199 ServerScheduler::~ServerScheduler()
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200 {
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201 if (!finish_)
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202 {
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203 LOG(ERROR) << "INTERNAL ERROR: ServerScheduler::Finalize() should be invoked manually to avoid mess in the destruction order!";
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204 Stop();
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205 }
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206 }
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207
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208
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209 void ServerScheduler::Stop()
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210 {
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211 if (!finish_)
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212 {
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213 finish_ = true;
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214
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215 if (worker_.joinable())
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216 {
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217 worker_.join();
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218 }
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219 }
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220 }
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221
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222
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223 void ServerScheduler::Submit(ServerJob& job)
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224 {
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225 if (job.filters_.empty())
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226 {
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227 return;
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228 }
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229
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230 SubmitInternal(job, false);
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231 }
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232
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233
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234 bool ServerScheduler::SubmitAndWait(ListOfStrings& outputs,
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235 ServerJob& job)
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236 {
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237 std::string jobId = job.GetId();
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238
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239 outputs.clear();
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240
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241 if (job.filters_.empty())
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242 {
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243 return true;
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244 }
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245
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246 // Add a sink filter to collect all the results of the filters
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247 // that have no next filter.
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248 ServerCommandInstance& sink = job.AddCommand(new Sink(outputs));
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249
1000
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250 for (std::list<ServerCommandInstance*>::iterator
1304
7b6925b0890d cppcheck
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251 it = job.filters_.begin(); it != job.filters_.end(); ++it)
781
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252 {
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253 if ((*it) != &sink &&
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254 (*it)->IsConnectedToSink())
781
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255 {
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256 (*it)->ConnectOutput(sink);
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257 }
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258 }
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259
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260 // Submit the job
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261 SubmitInternal(job, true);
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262
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263 // Wait for the job to complete (either success or failure)
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264 JobStatus status;
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265
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266 {
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267 boost::mutex::scoped_lock lock(mutex_);
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268
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269 assert(watchedJobStatus_.find(jobId) != watchedJobStatus_.end());
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270
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271 while (watchedJobStatus_[jobId] == JobStatus_Running)
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272 {
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273 watchedJobFinished_.wait(lock);
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274 }
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275
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276 status = watchedJobStatus_[jobId];
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277 watchedJobStatus_.erase(jobId);
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278 }
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279
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280 return (status == JobStatus_Success);
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281 }
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282
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283
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284 bool ServerScheduler::SubmitAndWait(ServerJob& job)
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285 {
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286 ListOfStrings ignoredSink;
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287 return SubmitAndWait(ignoredSink, job);
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288 }
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289
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290
781
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291 bool ServerScheduler::IsRunning(const std::string& jobId)
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292 {
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293 boost::mutex::scoped_lock lock(mutex_);
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294 return jobs_.find(jobId) != jobs_.end();
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295 }
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296
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297
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298 void ServerScheduler::Cancel(const std::string& jobId)
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299 {
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300 boost::mutex::scoped_lock lock(mutex_);
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301
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302 Jobs::iterator job = jobs_.find(jobId);
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303
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304 if (job != jobs_.end())
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305 {
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306 job->second.cancel_ = true;
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307 LOG(WARNING) << "Canceling a job (" << job->second.description_ << ")";
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308 }
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309 }
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310
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311
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312 float ServerScheduler::GetProgress(const std::string& jobId)
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313 {
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314 boost::mutex::scoped_lock lock(mutex_);
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315
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316 Jobs::iterator job = jobs_.find(jobId);
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317
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318 if (job == jobs_.end() ||
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319 job->second.size_ == 0 /* should never happen */)
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320 {
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321 // This job is not running
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322 return 1;
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323 }
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324
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325 if (job->second.failures_ != 0)
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326 {
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327 return 1;
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328 }
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329
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330 if (job->second.size_ == 1)
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331 {
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332 return job->second.success_;
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333 }
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334
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335 return (static_cast<float>(job->second.success_) /
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336 static_cast<float>(job->second.size_ - 1));
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337 }
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338
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339
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340 void ServerScheduler::GetListOfJobs(ListOfStrings& jobs)
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341 {
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342 boost::mutex::scoped_lock lock(mutex_);
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343
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344 jobs.clear();
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345
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346 for (Jobs::const_iterator
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347 it = jobs_.begin(); it != jobs_.end(); ++it)
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348 {
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349 jobs.push_back(it->first);
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350 }
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351 }
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352 }