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annotate OrthancFramework/Sources/FileStorage/MemoryStorageArea.cpp @ 4498:7b99e8bb8246

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IStorageArea::HasReadRange()
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 09 Feb 2021 11:37:13 +0100
parents fa2311f94d9f
children 7053502fbf97
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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) 2017-2021 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 #include "../PrecompiledHeaders.h"
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24 #include "MemoryStorageArea.h"
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25
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26 #include "../Logging.h"
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27 #include "../OrthancException.h"
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28 #include "../StringMemoryBuffer.h"
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29
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30 namespace Orthanc
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31 {
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32 MemoryStorageArea::~MemoryStorageArea()
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33 {
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34 for (Content::iterator it = content_.begin(); it != content_.end(); ++it)
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35 {
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36 if (it->second != NULL)
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37 {
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38 delete it->second;
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39 }
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40 }
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41 }
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42
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43 void MemoryStorageArea::Create(const std::string& uuid,
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44 const void* content,
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45 size_t size,
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46 FileContentType type)
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47 {
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48 LOG(INFO) << "Creating attachment \"" << uuid << "\" of \"" << static_cast<int>(type)
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49 << "\" type (size: " << (size / (1024 * 1024) + 1) << "MB)";
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50
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51 boost::mutex::scoped_lock lock(mutex_);
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52
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53 if (size != 0 &&
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54 content == NULL)
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55 {
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56 throw OrthancException(ErrorCode_NullPointer);
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57 }
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58 else if (content_.find(uuid) != content_.end())
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59 {
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60 throw OrthancException(ErrorCode_InternalError);
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61 }
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62 else
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63 {
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64 content_[uuid] = new std::string(reinterpret_cast<const char*>(content), size);
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65 }
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66 }
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67
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68
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69 IMemoryBuffer* MemoryStorageArea::Read(const std::string& uuid,
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70 FileContentType type)
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71 {
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72 LOG(INFO) << "Reading attachment \"" << uuid << "\" of \""
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73 << static_cast<int>(type) << "\" content type";
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74
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75 boost::mutex::scoped_lock lock(mutex_);
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76
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77 Content::const_iterator found = content_.find(uuid);
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78
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79 if (found == content_.end())
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80 {
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81 throw OrthancException(ErrorCode_InexistentFile);
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82 }
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83 else if (found->second == NULL)
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84 {
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85 throw OrthancException(ErrorCode_InternalError);
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86 }
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87 else
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88 {
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89 return StringMemoryBuffer::CreateFromCopy(*found->second);
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90 }
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91 }
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92
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93
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94 IMemoryBuffer* MemoryStorageArea::ReadRange(const std::string& uuid,
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95 FileContentType type,
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96 uint64_t start /* inclusive */,
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97 uint64_t end /* exclusive */)
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98 {
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99 LOG(INFO) << "Reading attachment \"" << uuid << "\" of \""
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100 << static_cast<int>(type) << "\" content type "
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101 << "(range from " << start << " to " << end << ")";
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102
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103 if (start > end)
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104 {
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105 throw OrthancException(ErrorCode_BadRange);
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106 }
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107 else if (start == end)
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108 {
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109 return new StringMemoryBuffer;
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110 }
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111 else
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112 {
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113 boost::mutex::scoped_lock lock(mutex_);
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114
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115 Content::const_iterator found = content_.find(uuid);
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116
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117 if (found == content_.end())
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118 {
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119 throw OrthancException(ErrorCode_InexistentFile);
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120 }
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121 else if (found->second == NULL)
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122 {
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123 throw OrthancException(ErrorCode_InternalError);
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124 }
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125 else if (end > found->second->size())
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126 {
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127 throw OrthancException(ErrorCode_BadRange);
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128 }
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129 else
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130 {
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131 std::string range;
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132 range.resize(end - start);
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133 assert(!range.empty());
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134
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135 memcpy(&range[0], &found->second[start], range.size());
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136
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137 return StringMemoryBuffer::CreateFromSwap(range);
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138 }
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139 }
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140 }
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141
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142
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143 bool MemoryStorageArea::HasReadRange() const
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144 {
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145 return true;
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146 }
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147
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148
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149 void MemoryStorageArea::Remove(const std::string& uuid,
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150 FileContentType type)
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151 {
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152 LOG(INFO) << "Deleting attachment \"" << uuid << "\" of type " << static_cast<int>(type);
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153
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154 boost::mutex::scoped_lock lock(mutex_);
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155
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156 Content::iterator found = content_.find(uuid);
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157
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158 if (found == content_.end())
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159 {
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160 // Ignore second removal
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161 }
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162 else if (found->second == NULL)
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163 {
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164 throw OrthancException(ErrorCode_InternalError);
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165 }
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166 else
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167 {
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168 delete found->second;
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169 content_.erase(found);
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170 }
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171 }
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172 }