Mercurial > hg > orthanc
view OrthancFramework/Sources/FileStorage/StorageCache.h @ 5735:0ca3e7c86b5d
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author | Alain Mazy <am@orthanc.team> |
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date | Mon, 29 Jul 2024 14:41:38 +0200 |
parents | f7adfb22e20e |
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/** * Orthanc - A Lightweight, RESTful DICOM Store * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2023 Osimis S.A., Belgium * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this program. If not, see * <http://www.gnu.org/licenses/>. **/ #pragma once #include "../Cache/MemoryStringCache.h" #include "../Compatibility.h" // For ORTHANC_OVERRIDE #include <boost/thread/mutex.hpp> #include <map> namespace Orthanc { /** * Note: this class is thread safe **/ class ORTHANC_PUBLIC StorageCache : public boost::noncopyable { public: // The StorageCache is only accessible through this accessor. // It will make sure that only one user will fill load data and fill // the cache if multiple users try to access the same item at the same time. // This scenario happens a lot when multiple workers from a viewer access // the same file. class Accessor : public MemoryStringCache::Accessor { StorageCache& storageCache_; public: explicit Accessor(StorageCache& cache); void Add(const std::string& uuid, FileContentType contentType, const std::string& value); void AddStartRange(const std::string& uuid, FileContentType contentType, const std::string& value); void Add(const std::string& uuid, FileContentType contentType, const void* buffer, size_t size); bool Fetch(std::string& value, const std::string& uuid, FileContentType contentType); bool FetchStartRange(std::string& value, const std::string& uuid, FileContentType contentType, uint64_t end /* exclusive */); bool FetchTranscodedInstance(std::string& value, const std::string& uuid, DicomTransferSyntax targetSyntax); void AddTranscodedInstance(const std::string& uuid, DicomTransferSyntax targetSyntax, const void* buffer, size_t size); }; private: MemoryStringCache cache_; std::set<DicomTransferSyntax> subKeysTransferSyntax_; boost::mutex subKeysMutex_; public: void SetMaximumSize(size_t size); void Invalidate(const std::string& uuid, FileContentType contentType); size_t GetCurrentSize() const; size_t GetNumberOfItems() const; private: void Add(const std::string& uuid, FileContentType contentType, const std::string& value); void AddStartRange(const std::string& uuid, FileContentType contentType, const std::string& value); void Add(const std::string& uuid, FileContentType contentType, const void* buffer, size_t size); bool Fetch(std::string& value, const std::string& uuid, FileContentType contentType); bool FetchStartRange(std::string& value, const std::string& uuid, FileContentType contentType, uint64_t end /* exclusive */); }; }