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annotate OrthancStone/Sources/Loaders/OracleScheduler.h @ 1592:0d4b11ba86df

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 23 Oct 2020 15:15:32 +0200
parents 244ad1e4e76a
children 4fb8fdf03314
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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
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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 Affero 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 * Affero 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 Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #pragma once
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23
1471
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24 #include "../OrthancStone.h"
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25
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26 #if !defined(ORTHANC_ENABLE_DCMTK)
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27 # error The macro ORTHANC_ENABLE_DCMTK must be defined
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28 #endif
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29
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30 #include "../Messages/IMessageEmitter.h"
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31 #include "../Messages/ObserverBase.h"
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32 #include "../Oracle/GetOrthancImageCommand.h"
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33 #include "../Oracle/GetOrthancWebViewerJpegCommand.h"
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34 #include "../Oracle/HttpCommand.h"
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35 #include "../Oracle/IOracle.h"
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36 #include "../Oracle/OracleCommandExceptionMessage.h"
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37 #include "../Oracle/OrthancRestApiCommand.h"
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38 #include "../Oracle/ReadFileCommand.h"
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39
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40 #if ORTHANC_ENABLE_DCMTK == 1
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41 # include "../Oracle/ParseDicomSuccessMessage.h"
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42 #endif
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43
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44 namespace OrthancStone
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45 {
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46 class OracleScheduler : public ObserverBase<OracleScheduler>
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47 {
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48 public:
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49 static const int PRIORITY_HIGH = -1;
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50 static const int PRIORITY_LOW = 100;
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51
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52 private:
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53 enum Priority
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54 {
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55 Priority_Low,
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56 Priority_Standard,
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57 Priority_High
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58 };
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59
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60 class ReceiverPayload;
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61 class ScheduledCommand;
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62
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63 typedef std::multimap<int, ScheduledCommand*> Queue;
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64
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65 IOracle& oracle_;
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66 IMessageEmitter& emitter_;
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67 Queue standardPriorityQueue_;
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68 Queue highPriorityQueue_;
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69 Queue lowPriorityQueue_;
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70 unsigned int maxHighPriorityCommands_; // Used if priority <= PRIORITY_HIGH
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71 unsigned int maxStandardPriorityCommands_;
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72 unsigned int maxLowPriorityCommands_; // Used if priority >= PRIORITY_LOW
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73 unsigned int activeHighPriorityCommands_;
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74 unsigned int activeStandardPriorityCommands_;
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75 unsigned int activeLowPriorityCommands_;
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76 uint64_t totalScheduled_;
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77 uint64_t totalProcessed_;
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78
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79 void ClearQueue(Queue& queue);
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80
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81 void RemoveReceiverFromQueue(Queue& queue,
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82 boost::shared_ptr<IObserver> receiver);
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83
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84 void CheckInvariants() const;
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85
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86 void SpawnFromQueue(Queue& queue,
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87 Priority priority);
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88
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89 void SpawnCommands();
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90
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91 void RemoveActiveCommand(const ReceiverPayload& payload);
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92
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93 void Handle(const GetOrthancImageCommand::SuccessMessage& message);
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94
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95 void Handle(const GetOrthancWebViewerJpegCommand::SuccessMessage& message);
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96
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97 void Handle(const HttpCommand::SuccessMessage& message);
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98
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99 void Handle(const OrthancRestApiCommand::SuccessMessage& message);
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100
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101 #if ORTHANC_ENABLE_DCMTK == 1
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102 void Handle(const ParseDicomSuccessMessage& message);
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103 #endif
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104
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105 void Handle(const ReadFileCommand::SuccessMessage& message);
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106
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107 void Handle(const OracleCommandExceptionMessage& message);
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108
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109 OracleScheduler(IOracle& oracle,
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110 IMessageEmitter& emitter,
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111 unsigned int maxHighPriority,
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112 unsigned int maxStandardPriority,
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113 unsigned int maxLowPriority);
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114
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115 public:
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116 static boost::shared_ptr<OracleScheduler> Create(IOracle& oracle,
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117 IObservable& oracleObservable,
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118 IMessageEmitter& emitter)
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119 {
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120 return Create(oracle, oracleObservable, emitter, 1, 4, 1);
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121 }
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122
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123 static boost::shared_ptr<OracleScheduler> Create(IOracle& oracle,
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124 IObservable& oracleObservable,
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125 IMessageEmitter& emitter,
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126 unsigned int maxHighPriority,
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127 unsigned int maxStandardPriority,
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128 unsigned int maxLowPriority);
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129
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130 ~OracleScheduler();
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131
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132 unsigned int GetMaxHighPriorityCommands() const
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133 {
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134 return maxHighPriorityCommands_;
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135 }
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136
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137 unsigned int GetMaxStandardPriorityCommands() const
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138 {
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139 return maxStandardPriorityCommands_;
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140 }
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141
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142 unsigned int GetMaxLowPriorityCommands() const
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143 {
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144 return maxLowPriorityCommands_;
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145 }
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146
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147 uint64_t GetTotalScheduled() const
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148 {
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149 return totalScheduled_;
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150 }
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151
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152 uint64_t GetTotalProcessed() const
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153 {
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154 return totalProcessed_;
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155 }
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156
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157 // Cancel the HTTP requests that are still pending in the queues,
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158 // and that are associated with the given receiver. Note that the
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159 // receiver might still receive answers to HTTP requests that were
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160 // already submitted to the oracle.
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161 void CancelRequests(boost::shared_ptr<IObserver> receiver);
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162
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163 void CancelAllRequests();
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164
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165 void Schedule(boost::shared_ptr<IObserver> receiver,
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166 int priority,
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167 IOracleCommand* command /* Takes ownership */);
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168 };
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169 }