source: XMLIO_V2/external/include/Poco/UniqueExpireLRUCache.h @ 80

Last change on this file since 80 was 80, checked in by ymipsl, 14 years ago

ajout lib externe

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1//
2// UniqueExpireLRUCache.h
3//
4// $Id: //poco/1.3/Foundation/include/Poco/UniqueExpireLRUCache.h#2 $
5//
6// Library: Foundation
7// Package: Cache
8// Module:  UniqueExpireLRUCache
9//
10// Definition of the UniqueExpireLRUCache class.
11//
12// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
13// and Contributors.
14//
15// Permission is hereby granted, free of charge, to any person or organization
16// obtaining a copy of the software and accompanying documentation covered by
17// this license (the "Software") to use, reproduce, display, distribute,
18// execute, and transmit the Software, and to prepare derivative works of the
19// Software, and to permit third-parties to whom the Software is furnished to
20// do so, all subject to the following:
21//
22// The copyright notices in the Software and this entire statement, including
23// the above license grant, this restriction and the following disclaimer,
24// must be included in all copies of the Software, in whole or in part, and
25// all derivative works of the Software, unless such copies or derivative
26// works are solely in the form of machine-executable object code generated by
27// a source language processor.
28//
29// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
30// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
31// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
32// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
33// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
34// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
35// DEALINGS IN THE SOFTWARE.
36//
37
38
39#ifndef  Foundation_UniqueExpireLRUCache_INCLUDED
40#define  Foundation_UniqueExpireLRUCache_INCLUDED
41
42
43#include "Poco/AbstractCache.h"
44#include "Poco/StrategyCollection.h"
45#include "Poco/UniqueExpireStrategy.h"
46#include "Poco/LRUStrategy.h"
47
48
49namespace Poco {
50
51
52template < 
53        class TKey,
54        class TValue
55>
56class UniqueExpireLRUCache: public AbstractCache<TKey, TValue, StrategyCollection<TKey, TValue> >
57        /// A UniqueExpireLRUCache combines LRU caching and time based per entry expire caching.
58        /// One can define for each cache entry a seperate timepoint
59        /// but also limit the size of the cache (per default: 1024).
60        /// Each TValue object must thus offer the following method:
61        ///   
62        ///    const Poco::Timestamp& getExpiration() const;
63        ///   
64        /// which returns the absolute timepoint when the entry will be invalidated.
65        /// Accessing an object will NOT update this absolute expire timepoint.
66        /// You can use the Poco::ExpirationDecorator to add the getExpiration
67        /// method to values that do not have a getExpiration function.
68{
69public:
70        UniqueExpireLRUCache(long cacheSize = 1024): 
71                AbstractCache<TKey, TValue, StrategyCollection<TKey, TValue> >(StrategyCollection<TKey, TValue>())
72        {
73                this->_strategy.pushBack(new LRUStrategy<TKey, TValue>(cacheSize));
74                this->_strategy.pushBack(new UniqueExpireStrategy<TKey, TValue>());
75        }
76
77        ~UniqueExpireLRUCache()
78        {
79        }
80
81private:
82        UniqueExpireLRUCache(const UniqueExpireLRUCache& aCache);
83        UniqueExpireLRUCache& operator = (const UniqueExpireLRUCache& aCache);
84};
85
86
87} // namespace Poco
88
89
90#endif
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