ClickHouse/contrib/libpoco/Foundation/include/Poco/AccessExpireLRUCache.h

65 lines
1.6 KiB
C++

//
// AccessExpireLRUCache.h
//
// $Id: //poco/1.4/Foundation/include/Poco/AccessExpireLRUCache.h#1 $
//
// Library: Foundation
// Package: Cache
// Module: AccessExpireLRUCache
//
// Definition of the AccessExpireLRUCache class.
//
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef Foundation_AccessExpireLRUCache_INCLUDED
#define Foundation_AccessExpireLRUCache_INCLUDED
#include "Poco/AbstractCache.h"
#include "Poco/StrategyCollection.h"
#include "Poco/AccessExpireStrategy.h"
#include "Poco/LRUStrategy.h"
namespace Poco {
template <
class TKey,
class TValue,
class TMutex = FastMutex,
class TEventMutex = FastMutex
>
class AccessExpireLRUCache: public AbstractCache<TKey, TValue, StrategyCollection<TKey, TValue>, TMutex, TEventMutex>
/// An AccessExpireLRUCache combines LRU caching and time based expire caching.
/// It cache entries for a fixed time period (per default 10 minutes)
/// but also limits the size of the cache (per default: 1024).
{
public:
AccessExpireLRUCache(long cacheSize = 1024, Timestamp::TimeDiff expire = 600000):
AbstractCache<TKey, TValue, StrategyCollection<TKey, TValue>, TMutex, TEventMutex >(StrategyCollection<TKey, TValue>())
{
this->_strategy.pushBack(new LRUStrategy<TKey, TValue>(cacheSize));
this->_strategy.pushBack(new AccessExpireStrategy<TKey, TValue>(expire));
}
~AccessExpireLRUCache()
{
}
private:
AccessExpireLRUCache(const AccessExpireLRUCache& aCache);
AccessExpireLRUCache& operator = (const AccessExpireLRUCache& aCache);
};
} // namespace Poco
#endif // Foundation_AccessExpireLRUCache_INCLUDED