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annotate OrthancFramework/Sources/JobsEngine/JobsRegistry.h @ 4870:43e613a7756b

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 11 Jan 2022 11:15:42 +0100
parents 7053502fbf97
children 0ea402b4d901
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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) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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22
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23
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24 #pragma once
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25
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26 #if !defined(ORTHANC_SANDBOXED)
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27 # error The macro ORTHANC_SANDBOXED must be defined
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28 #endif
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29
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30 #if ORTHANC_SANDBOXED == 1
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31 # error The job engine cannot be used in sandboxed environments
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32 #endif
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33
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34 #include "JobInfo.h"
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35 #include "IJobUnserializer.h"
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36
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37 #include <list>
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38 #include <set>
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39 #include <queue>
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40 #include <boost/thread/mutex.hpp>
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41 #include <boost/thread/condition_variable.hpp>
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42
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43 namespace Orthanc
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44 {
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45 // This class handles the state machine of the jobs engine
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46 class ORTHANC_PUBLIC JobsRegistry : public boost::noncopyable
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47 {
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48 public:
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49 class ORTHANC_PUBLIC IObserver : public boost::noncopyable
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50 {
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51 public:
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52 virtual ~IObserver()
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53 {
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54 }
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55
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56 virtual void SignalJobSubmitted(const std::string& jobId) = 0;
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57
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58 virtual void SignalJobSuccess(const std::string& jobId) = 0;
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59
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60 virtual void SignalJobFailure(const std::string& jobId) = 0;
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61 };
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62
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63 private:
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64 enum CompletedReason
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65 {
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66 CompletedReason_Success,
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67 CompletedReason_Failure,
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68 CompletedReason_Canceled
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69 };
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70
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71 class JobHandler;
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72
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73 struct PriorityComparator
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74 {
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75 bool operator() (JobHandler* const& a,
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76 JobHandler* const& b) const;
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77 };
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78
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79 typedef std::map<std::string, JobHandler*> JobsIndex;
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80 typedef std::list<JobHandler*> CompletedJobs;
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81 typedef std::set<JobHandler*> RetryJobs;
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82 typedef std::priority_queue<JobHandler*,
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83 std::vector<JobHandler*>, // Could be a "std::deque"
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84 PriorityComparator> PendingJobs;
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85
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86 boost::mutex mutex_;
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87 JobsIndex jobsIndex_;
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88 PendingJobs pendingJobs_;
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89 CompletedJobs completedJobs_;
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90 RetryJobs retryJobs_;
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91
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92 boost::condition_variable pendingJobAvailable_;
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93 boost::condition_variable someJobComplete_;
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94 size_t maxCompletedJobs_;
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95
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96 IObserver* observer_;
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97
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98
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99 #ifndef NDEBUG
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100 bool IsPendingJob(const JobHandler& job) const;
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101
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102 bool IsCompletedJob(JobHandler& job) const;
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103
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104 bool IsRetryJob(JobHandler& job) const;
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105 #endif
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106
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107 void CheckInvariants() const;
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108
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109 void ForgetOldCompletedJobs();
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110
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111 void SetCompletedJob(JobHandler& job,
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112 bool success);
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113
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114 void MarkRunningAsCompleted(JobHandler& job,
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115 CompletedReason reason);
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116
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117 void MarkRunningAsRetry(JobHandler& job,
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118 unsigned int timeout);
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119
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120 void MarkRunningAsPaused(JobHandler& job);
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121
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122 bool GetStateInternal(JobState& state,
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123 const std::string& id);
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124
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125 void RemovePendingJob(const std::string& id);
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126
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127 void RemoveRetryJob(JobHandler* handler);
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128
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129 void SubmitInternal(std::string& id,
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130 JobHandler* handler);
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131
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132 public:
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133 explicit JobsRegistry(size_t maxCompletedJobs);
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134
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135 JobsRegistry(IJobUnserializer& unserializer,
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136 const Json::Value& s,
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137 size_t maxCompletedJobs);
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138
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139 ~JobsRegistry();
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140
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141 void SetMaxCompletedJobs(size_t i);
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142
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143 size_t GetMaxCompletedJobs();
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144
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145 void ListJobs(std::set<std::string>& target);
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146
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147 bool GetJobInfo(JobInfo& target,
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148 const std::string& id);
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149
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150 bool GetJobOutput(std::string& output,
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151 MimeType& mime,
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152 std::string& filename,
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153 const std::string& job,
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154 const std::string& key);
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155
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156 void Serialize(Json::Value& target);
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157
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158 void Submit(std::string& id,
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159 IJob* job, // Takes ownership
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160 int priority);
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161
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162 void Submit(IJob* job, // Takes ownership
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163 int priority);
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164
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165 void SubmitAndWait(Json::Value& successContent,
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166 IJob* job, // Takes ownership
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167 int priority);
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168
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169 bool SetPriority(const std::string& id,
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170 int priority);
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171
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172 bool Pause(const std::string& id);
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173
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174 bool Resume(const std::string& id);
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175
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176 bool Resubmit(const std::string& id);
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177
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178 bool Cancel(const std::string& id);
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179
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180 void ScheduleRetries();
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181
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182 bool GetState(JobState& state,
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183 const std::string& id);
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184
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185 void SetObserver(IObserver& observer);
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186
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187 void ResetObserver();
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188
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189 void GetStatistics(unsigned int& pending,
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190 unsigned int& running,
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191 unsigned int& success,
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192 unsigned int& errors);
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193
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194 class ORTHANC_PUBLIC RunningJob : public boost::noncopyable
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195 {
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196 private:
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197 JobsRegistry& registry_;
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198 JobHandler* handler_; // Can only be accessed if the
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199 // registry mutex is locked!
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200 IJob* job_; // Will by design be in mutual exclusion,
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201 // because only one RunningJob can be
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202 // executed at a time on a JobHandler
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203
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204 std::string id_;
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205 int priority_;
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206 JobState targetState_;
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207 unsigned int targetRetryTimeout_;
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208 bool canceled_;
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209
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210 public:
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211 RunningJob(JobsRegistry& registry,
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212 unsigned int timeout);
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213
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214 ~RunningJob();
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215
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216 bool IsValid() const;
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217
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218 const std::string& GetId() const;
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219
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220 int GetPriority() const;
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221
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222 IJob& GetJob();
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223
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224 bool IsPauseScheduled();
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225
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226 bool IsCancelScheduled();
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227
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228 void MarkSuccess();
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229
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230 void MarkFailure();
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231
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232 void MarkPause();
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233
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234 void MarkCanceled();
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235
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236 void MarkRetry(unsigned int timeout);
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237
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238 void UpdateStatus(ErrorCode code,
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239 const std::string& details);
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240 };
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241 };
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242 }