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comparison Core/Cache/MemoryStringCache.h @ 3557:4d809b2e1141

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better cache toolbox: MemoryObjectCache
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 04 Nov 2019 15:18:38 +0100
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children 94f4a18a79cc
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3556:87940f7156e0 3557:4d809b2e1141
1 /**
2 * Orthanc - A Lightweight, RESTful DICOM Store
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
6 *
7 * This program is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
11 *
12 * In addition, as a special exception, the copyright holders of this
13 * program give permission to link the code of its release with the
14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
15 * that use the same license as the "OpenSSL" library), and distribute
16 * the linked executables. You must obey the GNU General Public License
17 * in all respects for all of the code used other than "OpenSSL". If you
18 * modify file(s) with this exception, you may extend this exception to
19 * your version of the file(s), but you are not obligated to do so. If
20 * you do not wish to do so, delete this exception statement from your
21 * version. If you delete this exception statement from all source files
22 * in the program, then also delete it here.
23 *
24 * This program is distributed in the hope that it will be useful, but
25 * WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27 * General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
31 **/
32
33
34 #pragma once
35
36 #include "MemoryObjectCache.h"
37
38 namespace Orthanc
39 {
40 /**
41 * Facade object around "MemoryObjectCache" that caches a dictionary
42 * of strings, using the "fetch/add" paradigm of memcached.
43 **/
44 class MemoryStringCache : public boost::noncopyable
45 {
46 private:
47 class StringValue;
48
49 MemoryObjectCache cache_;
50
51 public:
52 size_t GetMaximumSize()
53 {
54 return cache_.GetMaximumSize();
55 }
56
57 void SetMaximumSize(size_t size)
58 {
59 cache_.SetMaximumSize(size);
60 }
61
62 void Add(const std::string& key,
63 const std::string& value);
64
65 void Invalidate(const std::string& key)
66 {
67 cache_.Invalidate(key);
68 }
69
70 bool Fetch(std::string& value,
71 const std::string& key);
72 };
73 }