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133 lines
3.2 KiB
C++
133 lines
3.2 KiB
C++
//
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// Expire.h
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//
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// $Id: //poco/Main/Foundation/include/Poco/Expire.h#4 $
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//
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// Library: Foundation
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// Package: Events
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// Module: Expire
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//
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// Implementation of the Expire template.
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//
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// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#ifndef Foundation_Expire_INCLUDED
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#define Foundation_Expire_INCLUDED
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#include "Poco/Foundation.h"
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#include "Poco/AbstractDelegate.h"
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#include "Poco/Timestamp.h"
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namespace Poco {
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template <class TArgs>
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class Expire: public AbstractDelegate<TArgs>
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/// Decorator for AbstractDelegate adding automatic
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/// expiring of registrations to AbstractDelegates.
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{
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public:
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Expire(const AbstractDelegate<TArgs>& p, Timestamp::TimeDiff expireMillisecs):
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AbstractDelegate<TArgs>(p),
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_pDelegate(p.clone()),
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_expire(expireMillisecs*1000)
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{
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}
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Expire(const Expire& expire):
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AbstractDelegate<TArgs>(expire),
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_pDelegate(expire._pDelegate->clone()),
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_expire(expire._expire),
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_creationTime(expire._creationTime)
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{
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}
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~Expire()
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{
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destroy();
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}
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Expire& operator = (const Expire& expire)
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{
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if (&expire != this)
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{
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delete this->_pDelegate;
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this->_pDelegate = expire._pDelegate->clone();
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this->_expire = expire._expire;
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this->_creationTime = expire._creationTime;
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this->_pTarget = expire._pTarget;
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}
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return *this;
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}
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bool notify(const void* sender, TArgs& arguments)
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{
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if (!expired())
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return this->_pDelegate->notify(sender, arguments);
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else
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return false;
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}
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AbstractDelegate<TArgs>* clone() const
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{
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return new Expire(*this);
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}
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void destroy()
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{
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delete this->_pDelegate;
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this->_pDelegate = 0;
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}
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const AbstractDelegate<TArgs>& getDelegate() const
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{
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return *this->_pDelegate;
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}
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protected:
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bool expired() const
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{
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return _creationTime.isElapsed(_expire);
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}
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AbstractDelegate<TArgs>* _pDelegate;
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Timestamp::TimeDiff _expire;
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Timestamp _creationTime;
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private:
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Expire();
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};
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} // namespace Poco
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#endif
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