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annotate OrthancStone/Sources/Loaders/OracleScheduler.h @ 1739:9ac2a65d4172

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upgrade to year 2021
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 06 Jan 2021 17:50:00 +0100
parents 8563ea5d8ae4
children 3889ae96d2e9
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
1739
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5 * Copyright (C) 2017-2021 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 #include "../OrthancStone.h"
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26
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27 #if !defined(ORTHANC_ENABLE_DCMTK)
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28 # error The macro ORTHANC_ENABLE_DCMTK must be defined
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29 #endif
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30
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31 #include "../Messages/IMessageEmitter.h"
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32 #include "../Messages/ObserverBase.h"
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33 #include "../Oracle/GetOrthancImageCommand.h"
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34 #include "../Oracle/GetOrthancWebViewerJpegCommand.h"
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35 #include "../Oracle/HttpCommand.h"
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36 #include "../Oracle/IOracle.h"
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37 #include "../Oracle/OracleCommandExceptionMessage.h"
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38 #include "../Oracle/OrthancRestApiCommand.h"
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39 #include "../Oracle/ReadFileCommand.h"
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40
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41 #if ORTHANC_ENABLE_DCMTK == 1
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42 # include "../Oracle/ParseDicomSuccessMessage.h"
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43 #endif
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44
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45 namespace OrthancStone
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46 {
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47 class OracleScheduler : public ObserverBase<OracleScheduler>
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48 {
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49 public:
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50 static const int PRIORITY_HIGH = -1;
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51 static const int PRIORITY_LOW = 100;
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52
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53 private:
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54 enum Priority
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55 {
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56 Priority_Low,
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57 Priority_Standard,
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58 Priority_High
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59 };
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60
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61 class ReceiverPayload;
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62 class ScheduledCommand;
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63
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64 typedef std::multimap<int, ScheduledCommand*> Queue;
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65
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66 IOracle& oracle_;
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67 IMessageEmitter& emitter_;
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68 Queue standardPriorityQueue_;
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69 Queue highPriorityQueue_;
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70 Queue lowPriorityQueue_;
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71 unsigned int maxHighPriorityCommands_; // Used if priority <= PRIORITY_HIGH
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72 unsigned int maxStandardPriorityCommands_;
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73 unsigned int maxLowPriorityCommands_; // Used if priority >= PRIORITY_LOW
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74 unsigned int activeHighPriorityCommands_;
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75 unsigned int activeStandardPriorityCommands_;
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76 unsigned int activeLowPriorityCommands_;
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77 uint64_t totalScheduled_;
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78 uint64_t totalProcessed_;
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79
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80 void ClearQueue(Queue& queue);
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81
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82 void RemoveReceiverFromQueue(Queue& queue,
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83 boost::shared_ptr<IObserver> receiver);
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84
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85 void CheckInvariants() const;
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86
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87 void SpawnFromQueue(Queue& queue,
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88 Priority priority);
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89
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90 void SpawnCommands();
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91
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92 void RemoveActiveCommand(const ReceiverPayload& payload);
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93
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94 void Handle(const GetOrthancImageCommand::SuccessMessage& message);
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95
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96 void Handle(const GetOrthancWebViewerJpegCommand::SuccessMessage& message);
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97
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98 void Handle(const HttpCommand::SuccessMessage& message);
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99
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100 void Handle(const OrthancRestApiCommand::SuccessMessage& message);
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101
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102 #if ORTHANC_ENABLE_DCMTK == 1
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103 void Handle(const ParseDicomSuccessMessage& message);
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104 #endif
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105
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106 void Handle(const ReadFileCommand::SuccessMessage& message);
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107
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108 void Handle(const OracleCommandExceptionMessage& message);
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109
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110 OracleScheduler(IOracle& oracle,
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111 IMessageEmitter& emitter,
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112 unsigned int maxHighPriority,
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113 unsigned int maxStandardPriority,
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114 unsigned int maxLowPriority);
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115
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116 public:
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117 static boost::shared_ptr<OracleScheduler> Create(IOracle& oracle,
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118 IObservable& oracleObservable,
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119 IMessageEmitter& emitter)
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120 {
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121 return Create(oracle, oracleObservable, emitter, 1, 4, 1);
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122 }
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123
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124 static boost::shared_ptr<OracleScheduler> Create(IOracle& oracle,
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125 IObservable& oracleObservable,
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126 IMessageEmitter& emitter,
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127 unsigned int maxHighPriority,
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128 unsigned int maxStandardPriority,
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129 unsigned int maxLowPriority);
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130
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131 ~OracleScheduler();
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132
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133 unsigned int GetMaxHighPriorityCommands() const
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134 {
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135 return maxHighPriorityCommands_;
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136 }
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137
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138 unsigned int GetMaxStandardPriorityCommands() const
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139 {
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140 return maxStandardPriorityCommands_;
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141 }
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142
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143 unsigned int GetMaxLowPriorityCommands() const
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144 {
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145 return maxLowPriorityCommands_;
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146 }
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147
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148 uint64_t GetTotalScheduled() const
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149 {
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150 return totalScheduled_;
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151 }
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152
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153 uint64_t GetTotalProcessed() const
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154 {
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155 return totalProcessed_;
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156 }
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157
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158 // Cancel the HTTP requests that are still pending in the queues,
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159 // and that are associated with the given receiver. Note that the
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160 // receiver might still receive answers to HTTP requests that were
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161 // already submitted to the oracle.
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162 void CancelRequests(boost::shared_ptr<IObserver> receiver);
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163
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164 void CancelAllRequests();
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165
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166 void Schedule(boost::shared_ptr<IObserver> receiver,
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167 int priority,
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168 IOracleCommand* command /* Takes ownership */);
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169 };
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170 }