annotate Core/JobsEngine/JobsRegistry.h @ 2569:2af17cd5eb1f jobs

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 07 May 2018 15:37:20 +0200
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children 2e879c796ec7
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2569
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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 #pragma once
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35
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36 #if !defined(ORTHANC_SANDBOXED)
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37 # error The macro ORTHANC_SANDBOXED must be defined
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38 #endif
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39
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40 #if ORTHANC_SANDBOXED == 1
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41 # error The job engine cannot be used in sandboxed environments
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42 #endif
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43
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44 #include "JobInfo.h"
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45
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46 #include <list>
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47 #include <set>
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48 #include <queue>
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49 #include <boost/thread/mutex.hpp>
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50 #include <boost/thread/condition_variable.hpp>
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51
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52 namespace Orthanc
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53 {
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54 // This class handles the state machine of the jobs engine
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55 class JobsRegistry : public boost::noncopyable
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56 {
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57 private:
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58 class JobHandler;
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59
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60 struct PriorityComparator
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61 {
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62 bool operator() (JobHandler*& a,
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63 JobHandler*& b) const;
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64 };
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65
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66 typedef std::map<std::string, JobHandler*> JobsIndex;
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67 typedef std::list<JobHandler*> CompletedJobs;
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68 typedef std::set<JobHandler*> RetryJobs;
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69 typedef std::priority_queue<JobHandler*,
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70 std::vector<JobHandler*>, // Could be a "std::deque"
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71 PriorityComparator> PendingJobs;
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72
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73 boost::mutex mutex_;
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74 JobsIndex jobsIndex_;
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75 PendingJobs pendingJobs_;
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76 CompletedJobs completedJobs_;
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77 RetryJobs retryJobs_;
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78
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79 boost::condition_variable pendingJobAvailable_;
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80 size_t maxCompletedJobs_;
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81
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82
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83 #ifndef NDEBUG
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84 bool IsPendingJob(const JobHandler& job) const;
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85
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86 bool IsCompletedJob(JobHandler& job) const;
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87
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88 bool IsRetryJob(JobHandler& job) const;
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89 #endif
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90
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91 void CheckInvariants() const;
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92
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93 void ForgetOldCompletedJobs();
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94
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95 void MarkRunningAsCompleted(JobHandler& job,
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96 bool success);
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97
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98 void MarkRunningAsRetry(JobHandler& job,
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99 unsigned int timeout);
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100
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101 void MarkRunningAsPaused(JobHandler& job);
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102
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103 public:
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104 JobsRegistry() :
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105 maxCompletedJobs_(10)
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106 {
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107 }
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108
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109
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110 ~JobsRegistry();
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111
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112 void SetMaxCompletedJobs(size_t i);
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113
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114 void ListJobs(std::set<std::string>& target);
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115
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116 bool GetJobInfo(JobInfo& target,
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117 const std::string& id);
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118
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119 void Submit(std::string& id,
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120 IJob* job, // Takes ownership
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121 int priority);
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122
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123 void Submit(IJob* job, // Takes ownership
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124 int priority);
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125
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126 void SetPriority(const std::string& id,
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127 int priority);
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128
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129 void Pause(const std::string& id);
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130
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131 void Resume(const std::string& id);
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132
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133 void Resubmit(const std::string& id);
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134
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135 void ScheduleRetries();
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136
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137 bool GetState(JobState& state,
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138 const std::string& id);
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139
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140 class RunningJob : public boost::noncopyable
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141 {
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142 private:
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143 JobsRegistry& registry_;
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144 JobHandler* handler_; // Can only be accessed if the
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145 // registry mutex is locked!
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146 IJob* job_; // Will by design be in mutual exclusion,
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147 // because only one RunningJob can be
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148 // executed at a time on a JobHandler
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149
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150 std::string id_;
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151 int priority_;
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152 JobState targetState_;
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153 unsigned int targetRetryTimeout_;
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154
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155 public:
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156 RunningJob(JobsRegistry& registry,
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157 unsigned int timeout);
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158
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159 ~RunningJob();
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160
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161 bool IsValid() const;
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162
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163 const std::string& GetId() const;
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164
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165 int GetPriority() const;
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166
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167 IJob& GetJob();
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168
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169 bool IsPauseScheduled();
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170
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171 void MarkSuccess();
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172
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173 void MarkFailure();
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174
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175 void MarkPause();
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176
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177 void MarkRetry(unsigned int timeout);
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178
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179 void UpdateStatus(ErrorCode code);
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180 };
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181 };
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182 }