Mercurial > hg > orthanc
view OrthancFramework/Sources/FileStorage/MemoryStorageArea.cpp @ 5420:d37dff2c0028 am-new-cache
Optimized the MemoryStringCache to prevent loading the same file multiple times if multiple users request the same file at the same time
author | Alain Mazy <am@osimis.io> |
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date | Mon, 13 Nov 2023 17:01:59 +0100 |
parents | 08b5516c6e5e |
children | b83192e7ad10 |
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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) 2021-2023 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/>. **/ #include "../PrecompiledHeaders.h" #include "MemoryStorageArea.h" #include "../Logging.h" #include "../OrthancException.h" #include "../StringMemoryBuffer.h" namespace Orthanc { MemoryStorageArea::~MemoryStorageArea() { for (Content::iterator it = content_.begin(); it != content_.end(); ++it) { if (it->second != NULL) { delete it->second; } } } void MemoryStorageArea::Create(const std::string& uuid, const void* content, size_t size, FileContentType type) { LOG(INFO) << "Creating attachment \"" << uuid << "\" of \"" << static_cast<int>(type) << "\" type (size: " << (size / (1024 * 1024) + 1) << "MB)"; Mutex::ScopedLock lock(mutex_); if (size != 0 && content == NULL) { throw OrthancException(ErrorCode_NullPointer); } else if (content_.find(uuid) != content_.end()) { throw OrthancException(ErrorCode_InternalError); } else { content_[uuid] = new std::string(reinterpret_cast<const char*>(content), size); } } IMemoryBuffer* MemoryStorageArea::Read(const std::string& uuid, FileContentType type) { LOG(INFO) << "Reading attachment \"" << uuid << "\" of \"" << static_cast<int>(type) << "\" content type"; Mutex::ScopedLock lock(mutex_); Content::const_iterator found = content_.find(uuid); if (found == content_.end()) { throw OrthancException(ErrorCode_InexistentFile); } else if (found->second == NULL) { throw OrthancException(ErrorCode_InternalError); } else { return StringMemoryBuffer::CreateFromCopy(*found->second); } } IMemoryBuffer* MemoryStorageArea::ReadRange(const std::string& uuid, FileContentType type, uint64_t start /* inclusive */, uint64_t end /* exclusive */) { LOG(INFO) << "Reading attachment \"" << uuid << "\" of \"" << static_cast<int>(type) << "\" content type " << "(range from " << start << " to " << end << ")"; if (start > end) { throw OrthancException(ErrorCode_BadRange); } else if (start == end) { return new StringMemoryBuffer; } else { Mutex::ScopedLock lock(mutex_); Content::const_iterator found = content_.find(uuid); if (found == content_.end()) { throw OrthancException(ErrorCode_InexistentFile); } else if (found->second == NULL) { throw OrthancException(ErrorCode_InternalError); } else if (end > found->second->size()) { throw OrthancException(ErrorCode_BadRange); } else { std::string range; range.resize(end - start); assert(!range.empty()); memcpy(&range[0], &found->second[start], range.size()); return StringMemoryBuffer::CreateFromSwap(range); } } } bool MemoryStorageArea::HasReadRange() const { return true; } void MemoryStorageArea::Remove(const std::string& uuid, FileContentType type) { LOG(INFO) << "Deleting attachment \"" << uuid << "\" of type " << static_cast<int>(type); Mutex::ScopedLock lock(mutex_); Content::iterator found = content_.find(uuid); if (found == content_.end()) { // Ignore second removal } else if (found->second == NULL) { throw OrthancException(ErrorCode_InternalError); } else { delete found->second; content_.erase(found); } } }