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annotate OrthancFramework/Sources/FileStorage/StorageCache.cpp @ 4792:434843934307 storage-cache

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Added a StorageCache in the StorageAccessor
author Alain Mazy <am@osimis.io>
date Thu, 30 Sep 2021 12:14:19 +0200
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children 6c276fac0cc0
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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 "StorageCache.h"
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25
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26 #include "../Compatibility.h"
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27 #include "../OrthancException.h"
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28
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29
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30
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31 namespace Orthanc
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32 {
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33 bool IsAcceptedContentType(FileContentType contentType)
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34 {
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35 return contentType == FileContentType_Dicom ||
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36 contentType == FileContentType_DicomUntilPixelData ||
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37 contentType == FileContentType_DicomAsJson;
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38 }
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39
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40 const char* ToString(FileContentType contentType)
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41 {
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42 switch (contentType)
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43 {
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44 case FileContentType_Dicom:
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45 return "dicom";
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46 case FileContentType_DicomUntilPixelData:
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47 return "dicom-header";
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48 case FileContentType_DicomAsJson:
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49 return "dicom-json";
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50 default:
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51 throw OrthancException(ErrorCode_InternalError,
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52 "ContentType not supported in StorageCache");
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53 }
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54 }
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55
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56 void GetCacheKey(std::string& key, const std::string& uuid, FileContentType contentType)
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57 {
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58 key = uuid + ":" + std::string(ToString(contentType));
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59 }
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60
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61 void StorageCache::SetMaximumSize(size_t size)
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62 {
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63 cache_.SetMaximumSize(size);
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64 }
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65
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66 void StorageCache::Add(const std::string& uuid,
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67 FileContentType contentType,
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68 const std::string& value)
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69 {
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70 if (!IsAcceptedContentType(contentType))
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71 {
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72 return;
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73 }
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74
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75 std::string key;
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76 GetCacheKey(key, uuid, contentType);
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77 cache_.Add(key, value);
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78 }
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79
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80 void StorageCache::Add(const std::string& uuid,
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81 FileContentType contentType,
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82 const void* buffer,
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83 size_t size)
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84 {
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85 if (!IsAcceptedContentType(contentType))
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86 {
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87 return;
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88 }
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89
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90 std::string key;
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91 GetCacheKey(key, uuid, contentType);
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92 cache_.Add(key, buffer, size);
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93 }
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94
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95 void StorageCache::Invalidate(const std::string& uuid, FileContentType contentType)
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96 {
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97 std::string key;
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98 GetCacheKey(key, uuid, contentType);
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99 cache_.Invalidate(key);
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100 }
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101
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102 bool StorageCache::Fetch(std::string& value,
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103 const std::string& uuid,
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104 FileContentType contentType)
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105 {
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106 if (!IsAcceptedContentType(contentType))
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107 {
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108 return false;
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109 }
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110
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111 std::string key;
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112 GetCacheKey(key, uuid, contentType);
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113
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114 return cache_.Fetch(value, key);
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115 }
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116
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117
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118 }