mirror of
https://github.com/pocoproject/poco.git
synced 2024-12-13 10:32:57 +01:00
100 lines
3.3 KiB
C++
100 lines
3.3 KiB
C++
//
|
|
// AbstractStrategy.h
|
|
//
|
|
// $Id: //poco/1.4/Foundation/include/Poco/AbstractStrategy.h#1 $
|
|
//
|
|
// Library: Foundation
|
|
// Package: Cache
|
|
// Module: AbstractCache
|
|
//
|
|
// Definition of the AbstractStrategy class.
|
|
//
|
|
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person or organization
|
|
// obtaining a copy of the software and accompanying documentation covered by
|
|
// this license (the "Software") to use, reproduce, display, distribute,
|
|
// execute, and transmit the Software, and to prepare derivative works of the
|
|
// Software, and to permit third-parties to whom the Software is furnished to
|
|
// do so, all subject to the following:
|
|
//
|
|
// The copyright notices in the Software and this entire statement, including
|
|
// the above license grant, this restriction and the following disclaimer,
|
|
// must be included in all copies of the Software, in whole or in part, and
|
|
// all derivative works of the Software, unless such copies or derivative
|
|
// works are solely in the form of machine-executable object code generated by
|
|
// a source language processor.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
|
|
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
|
|
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
|
|
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
// DEALINGS IN THE SOFTWARE.
|
|
//
|
|
|
|
|
|
#ifndef Foundation_AbstractStrategy_INCLUDED
|
|
#define Foundation_AbstractStrategy_INCLUDED
|
|
|
|
|
|
#include "Poco/KeyValueArgs.h"
|
|
#include "Poco/ValidArgs.h"
|
|
#include "Poco/EventArgs.h"
|
|
#include <set>
|
|
|
|
|
|
namespace Poco {
|
|
|
|
|
|
template <class TKey, class TValue>
|
|
class AbstractStrategy
|
|
/// An AbstractStrategy is the interface for all strategies.
|
|
{
|
|
public:
|
|
AbstractStrategy()
|
|
{
|
|
}
|
|
|
|
virtual ~AbstractStrategy()
|
|
{
|
|
}
|
|
|
|
virtual void onUpdate(const void* pSender, const KeyValueArgs <TKey, TValue>& args)
|
|
/// Updates an existing entry.
|
|
{
|
|
onRemove(pSender,args.key());
|
|
onAdd(pSender, args);
|
|
}
|
|
|
|
virtual void onAdd(const void* pSender, const KeyValueArgs <TKey, TValue>& key) = 0;
|
|
/// Adds the key to the strategy.
|
|
/// If for the key already an entry exists, an exception will be thrown.
|
|
|
|
virtual void onRemove(const void* pSender, const TKey& key) = 0;
|
|
/// Removes an entry from the strategy. If the entry is not found
|
|
/// the remove is ignored.
|
|
|
|
virtual void onGet(const void* pSender, const TKey& key) = 0;
|
|
/// Informs the strategy that a read-access happens to an element.
|
|
|
|
virtual void onClear(const void* pSender, const EventArgs& args) = 0;
|
|
/// Removes all elements from the cache.
|
|
|
|
virtual void onIsValid(const void* pSender, ValidArgs<TKey>& key) = 0;
|
|
/// Used to query if a key is still valid (i.e. cached).
|
|
|
|
virtual void onReplace(const void* pSender, std::set<TKey>& elemsToRemove) = 0;
|
|
/// Used by the Strategy to indicate which elements should be removed from
|
|
/// the cache. Note that onReplace does not change the current list of keys.
|
|
/// The cache object is reponsible to remove the elements.
|
|
};
|
|
|
|
|
|
} // namespace Poco
|
|
|
|
|
|
#endif // Foundation_AbstractStrategy_INCLUDED
|