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annotate Core/Cache/MemoryCache.h @ 2834:d4dc6e49851d

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 20 Sep 2018 14:21:51 +0200
parents 99116ed6f38c
children 4e43e67f8ecf
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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) 2017-2018 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 General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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33
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34 #pragma once
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35
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36 #include <memory>
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37 #include "LeastRecentlyUsedIndex.h"
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38 #include "ICachePageProvider.h"
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39
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40 namespace Orthanc
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41 {
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42 /**
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43 * WARNING: This class is NOT thread-safe.
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44 **/
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45 class MemoryCache
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46 {
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47 private:
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48 struct Page
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49 {
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50 std::string id_;
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51 std::auto_ptr<IDynamicObject> content_;
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52 };
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53
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54 ICachePageProvider& provider_;
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55 size_t cacheSize_;
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56 LeastRecentlyUsedIndex<std::string, Page*> index_;
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58 Page& Load(const std::string& id);
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59
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60 public:
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61 MemoryCache(ICachePageProvider& provider,
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62 size_t cacheSize);
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63
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64 ~MemoryCache();
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65
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66 IDynamicObject& Access(const std::string& id);
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68 void Invalidate(const std::string& id);
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69 };
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70 }