Mercurial > hg > orthanc-authorization
annotate Plugin/MemoryCache.cpp @ 188:c4b908970ae4
updated copyright, as Orthanc Team now replaces Osimis
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Thu, 30 May 2024 21:59:01 +0200 |
| parents | 9be1ee2b8fe1 |
| children |
| rev | line source |
|---|---|
| 1 | 1 /** |
| 2 * Advanced authorization plugin for Orthanc | |
| 68 | 3 * Copyright (C) 2017-2023 Osimis S.A., Belgium |
| 150 | 4 * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium |
|
188
c4b908970ae4
updated copyright, as Orthanc Team now replaces Osimis
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
150
diff
changeset
|
5 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
| 1 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU Affero General Public License | |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 11 * | |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 **/ | |
| 20 | |
| 21 #include "MemoryCache.h" | |
| 22 | |
| 23 namespace OrthancPlugins | |
| 24 { | |
| 25 class MemoryCache::Payload : public boost::noncopyable | |
| 26 { | |
| 27 private: | |
| 28 bool hasExpiration_; | |
| 29 boost::posix_time::ptime expiration_; | |
| 30 std::string value_; | |
| 31 | |
| 32 public: | |
| 33 Payload(const std::string& value, | |
| 34 unsigned int validity) : | |
| 35 value_(value) | |
| 36 { | |
| 37 if (validity == 0) | |
| 38 { | |
| 39 hasExpiration_ = false; | |
| 40 } | |
| 41 else | |
| 42 { | |
| 43 hasExpiration_ = true; | |
| 44 expiration_ = (boost::posix_time::second_clock::local_time() + | |
| 45 boost::posix_time::seconds(validity)); | |
| 46 } | |
| 47 } | |
| 48 | |
| 49 bool HasExpired() const | |
| 50 { | |
| 51 return (hasExpiration_ && | |
| 52 boost::posix_time::second_clock::local_time() >= expiration_); | |
| 53 } | |
| 54 | |
| 55 bool GetValue(std::string& target) const | |
| 56 { | |
| 57 if (HasExpired()) | |
| 58 { | |
| 59 return false; | |
| 60 } | |
| 61 else | |
| 62 { | |
| 63 target = value_; | |
| 64 return true; | |
| 65 } | |
| 66 } | |
| 67 }; | |
| 68 | |
| 69 | |
| 70 void MemoryCache::RemoveOldest() | |
| 71 { | |
| 72 Payload* payload = NULL; | |
| 73 index_.RemoveOldest(payload); | |
| 74 assert(payload != NULL); | |
| 75 delete payload; | |
| 76 } | |
| 77 | |
| 78 | |
| 79 void MemoryCache::InvalidateInternal(const std::string& key) | |
| 80 { | |
| 81 Payload* payload = NULL; | |
| 82 | |
| 83 if (index_.Contains(key, payload)) | |
| 84 { | |
| 85 assert(payload != NULL); | |
| 86 delete payload; | |
| 87 index_.Invalidate(key); | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 | |
| 92 MemoryCache::MemoryCache(unsigned int maxSize) : | |
| 93 maxSize_(maxSize) | |
| 94 { | |
| 95 if (maxSize_ == 0) | |
| 96 { | |
| 97 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 | |
| 102 MemoryCache::~MemoryCache() | |
| 103 { | |
| 104 while (!index_.IsEmpty()) | |
| 105 { | |
| 106 RemoveOldest(); | |
| 107 } | |
| 108 } | |
| 109 | |
| 110 | |
| 111 void MemoryCache::Invalidate(const std::string& key) | |
| 112 { | |
| 113 boost::mutex::scoped_lock lock(mutex_); | |
| 114 InvalidateInternal(key); | |
| 115 } | |
| 116 | |
| 117 | |
| 118 void MemoryCache::Store(const std::string& key, | |
| 119 const std::string& value, | |
| 120 unsigned int expiration /* in seconds */) | |
| 121 { | |
| 122 boost::mutex::scoped_lock lock(mutex_); | |
| 123 | |
| 124 InvalidateInternal(key); | |
| 125 | |
| 126 if (index_.GetSize() == maxSize_) | |
| 127 { | |
| 128 // The cache is full: Make some room | |
| 129 RemoveOldest(); | |
| 130 } | |
| 131 | |
| 132 index_.Add(key, new Payload(value, expiration)); | |
| 133 } | |
| 134 | |
| 135 | |
| 136 bool MemoryCache::Retrieve(std::string& value, | |
| 137 const std::string& key) | |
| 138 { | |
| 139 boost::mutex::scoped_lock lock(mutex_); | |
| 140 | |
| 141 Payload* payload = NULL; | |
| 142 | |
| 143 if (!index_.Contains(key, payload)) | |
| 144 { | |
| 145 return false; | |
| 146 } | |
| 147 | |
| 148 assert(payload != NULL); | |
| 149 | |
| 150 if (payload->GetValue(value)) | |
| 151 { | |
| 152 index_.MakeMostRecent(key); | |
| 153 return true; | |
| 154 } | |
| 155 else | |
| 156 { | |
| 157 // The value has expired in the cache: Invalidate it | |
| 158 delete payload; | |
| 159 index_.Invalidate(key); | |
| 160 return false; | |
| 161 } | |
| 162 } | |
| 163 } |