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annotate OrthancFramework/Sources/JobsEngine/JobsRegistry.h @ 4300:b30a8de92ad9

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abi continued
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 05 Nov 2020 19:33:18 +0100
parents 4d42408da117
children 44b53a2c0a13
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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 #pragma once
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24
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25 #if !defined(ORTHANC_SANDBOXED)
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26 # error The macro ORTHANC_SANDBOXED must be defined
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27 #endif
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28
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29 #if ORTHANC_SANDBOXED == 1
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30 # error The job engine cannot be used in sandboxed environments
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31 #endif
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32
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33 #include "JobInfo.h"
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34 #include "IJobUnserializer.h"
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35
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36 #include <list>
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37 #include <set>
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38 #include <queue>
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39 #include <boost/thread/mutex.hpp>
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40 #include <boost/thread/condition_variable.hpp>
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41
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42 namespace Orthanc
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43 {
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44 // This class handles the state machine of the jobs engine
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45 class ORTHANC_PUBLIC JobsRegistry : public boost::noncopyable
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46 {
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47 public:
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48 class ORTHANC_PUBLIC IObserver : public boost::noncopyable
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49 {
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50 public:
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51 virtual ~IObserver();
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52
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53 virtual void SignalJobSubmitted(const std::string& jobId) = 0;
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54
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55 virtual void SignalJobSuccess(const std::string& jobId) = 0;
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56
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57 virtual void SignalJobFailure(const std::string& jobId) = 0;
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58 };
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59
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60 private:
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61 enum CompletedReason
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62 {
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63 CompletedReason_Success,
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64 CompletedReason_Failure,
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65 CompletedReason_Canceled
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66 };
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67
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68 class JobHandler;
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69
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70 struct PriorityComparator
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71 {
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72 bool operator() (JobHandler* const& a,
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73 JobHandler* const& b) const;
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74 };
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75
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76 typedef std::map<std::string, JobHandler*> JobsIndex;
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77 typedef std::list<JobHandler*> CompletedJobs;
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78 typedef std::set<JobHandler*> RetryJobs;
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79 typedef std::priority_queue<JobHandler*,
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80 std::vector<JobHandler*>, // Could be a "std::deque"
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81 PriorityComparator> PendingJobs;
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82
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83 boost::mutex mutex_;
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84 JobsIndex jobsIndex_;
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85 PendingJobs pendingJobs_;
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86 CompletedJobs completedJobs_;
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87 RetryJobs retryJobs_;
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88
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89 boost::condition_variable pendingJobAvailable_;
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90 boost::condition_variable someJobComplete_;
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91 size_t maxCompletedJobs_;
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92
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93 IObserver* observer_;
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94
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95
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96 #ifndef NDEBUG
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97 bool IsPendingJob(const JobHandler& job) const;
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98
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99 bool IsCompletedJob(JobHandler& job) const;
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100
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101 bool IsRetryJob(JobHandler& job) const;
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102 #endif
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103
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104 void CheckInvariants() const;
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105
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106 void ForgetOldCompletedJobs();
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107
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108 void SetCompletedJob(JobHandler& job,
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109 bool success);
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110
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111 void MarkRunningAsCompleted(JobHandler& job,
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112 CompletedReason reason);
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113
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114 void MarkRunningAsRetry(JobHandler& job,
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115 unsigned int timeout);
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116
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117 void MarkRunningAsPaused(JobHandler& job);
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118
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119 bool GetStateInternal(JobState& state,
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120 const std::string& id);
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121
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122 void RemovePendingJob(const std::string& id);
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123
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124 void RemoveRetryJob(JobHandler* handler);
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125
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126 void SubmitInternal(std::string& id,
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127 JobHandler* handler);
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128
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129 public:
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130 explicit JobsRegistry(size_t maxCompletedJobs);
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131
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132 JobsRegistry(IJobUnserializer& unserializer,
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133 const Json::Value& s,
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134 size_t maxCompletedJobs);
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135
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136 ~JobsRegistry();
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137
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138 void SetMaxCompletedJobs(size_t i);
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139
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140 size_t GetMaxCompletedJobs();
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141
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142 void ListJobs(std::set<std::string>& target);
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143
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144 bool GetJobInfo(JobInfo& target,
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145 const std::string& id);
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146
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147 bool GetJobOutput(std::string& output,
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148 MimeType& mime,
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149 const std::string& job,
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150 const std::string& key);
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151
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152 void Serialize(Json::Value& target);
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153
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154 void Submit(std::string& id,
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155 IJob* job, // Takes ownership
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156 int priority);
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157
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158 void Submit(IJob* job, // Takes ownership
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159 int priority);
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160
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161 void SubmitAndWait(Json::Value& successContent,
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162 IJob* job, // Takes ownership
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163 int priority);
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164
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165 bool SetPriority(const std::string& id,
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166 int priority);
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167
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168 bool Pause(const std::string& id);
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169
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170 bool Resume(const std::string& id);
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171
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172 bool Resubmit(const std::string& id);
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173
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174 bool Cancel(const std::string& id);
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175
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176 void ScheduleRetries();
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177
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178 bool GetState(JobState& state,
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179 const std::string& id);
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180
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181 void SetObserver(IObserver& observer);
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182
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183 void ResetObserver();
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184
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185 void GetStatistics(unsigned int& pending,
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186 unsigned int& running,
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187 unsigned int& success,
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188 unsigned int& errors);
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189
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190 class ORTHANC_PUBLIC RunningJob : public boost::noncopyable
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191 {
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192 private:
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193 JobsRegistry& registry_;
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194 JobHandler* handler_; // Can only be accessed if the
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195 // registry mutex is locked!
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196 IJob* job_; // Will by design be in mutual exclusion,
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197 // because only one RunningJob can be
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198 // executed at a time on a JobHandler
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199
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200 std::string id_;
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201 int priority_;
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202 JobState targetState_;
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203 unsigned int targetRetryTimeout_;
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204 bool canceled_;
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205
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206 public:
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207 RunningJob(JobsRegistry& registry,
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208 unsigned int timeout);
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209
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210 ~RunningJob();
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211
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212 bool IsValid() const;
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213
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214 const std::string& GetId() const;
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215
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216 int GetPriority() const;
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217
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218 IJob& GetJob();
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219
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220 bool IsPauseScheduled();
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221
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222 bool IsCancelScheduled();
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223
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224 void MarkSuccess();
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225
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226 void MarkFailure();
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227
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228 void MarkPause();
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229
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230 void MarkCanceled();
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231
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232 void MarkRetry(unsigned int timeout);
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233
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234 void UpdateStatus(ErrorCode code,
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235 const std::string& details);
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236 };
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237 };
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238 }