poco/Foundation/include/Poco/Expire.h

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//
// Expire.h
//
// Library: Foundation
// Package: Events
// Module: Expire
//
// Implementation of the Expire template.
//
// Copyright (c) 2006-2011, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
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//
#ifndef Foundation_Expire_INCLUDED
#define Foundation_Expire_INCLUDED
#include "Poco/Foundation.h"
#include "Poco/AbstractDelegate.h"
#include "Poco/Timestamp.h"
namespace Poco {
template <class TArgs>
class Expire: public AbstractDelegate<TArgs>
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/// Decorator for AbstractDelegate adding automatic
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/// expiration of registrations to AbstractDelegate's.
{
public:
Expire(const AbstractDelegate<TArgs>& p, Timestamp::TimeDiff expireMillisecs):
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_pDelegate(p.clone()),
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_expire(expireMillisecs*1000)
{
}
Expire(const Expire& expire):
AbstractDelegate<TArgs>(expire),
_pDelegate(expire._pDelegate->clone()),
_expire(expire._expire),
_creationTime(expire._creationTime)
{
}
~Expire()
{
delete _pDelegate;
}
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Expire& operator = (const Expire& expire)
{
if (&expire != this)
{
delete this->_pDelegate;
this->_pDelegate = expire._pDelegate->clone();
this->_expire = expire._expire;
this->_creationTime = expire._creationTime;
this->_pTarget = expire._pTarget;
}
return *this;
}
bool notify(const void* sender, TArgs& arguments)
{
if (!expired())
return this->_pDelegate->notify(sender, arguments);
else
return false;
}
bool equals(const AbstractDelegate<TArgs>& other) const
{
return other.equals(*_pDelegate);
}
AbstractDelegate<TArgs>* clone() const
{
return new Expire(*this);
}
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void disable()
{
_pDelegate->disable();
}
const AbstractDelegate<TArgs>* unwrap() const
{
return this->_pDelegate;
}
protected:
bool expired() const
{
return _creationTime.isElapsed(_expire);
}
AbstractDelegate<TArgs>* _pDelegate;
Timestamp::TimeDiff _expire;
Timestamp _creationTime;
private:
Expire();
};
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template <>
class Expire<void>: public AbstractDelegate<void>
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/// Decorator for AbstractDelegate adding automatic
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/// expiration of registrations to AbstractDelegate's.
{
public:
Expire(const AbstractDelegate<void>& p, Timestamp::TimeDiff expireMillisecs):
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_pDelegate(p.clone()),
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_expire(expireMillisecs*1000)
{
}
Expire(const Expire& expire):
AbstractDelegate<void>(expire),
_pDelegate(expire._pDelegate->clone()),
_expire(expire._expire),
_creationTime(expire._creationTime)
{
}
~Expire()
{
delete _pDelegate;
}
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Expire& operator = (const Expire& expire)
{
if (&expire != this)
{
delete this->_pDelegate;
this->_pDelegate = expire._pDelegate->clone();
this->_expire = expire._expire;
this->_creationTime = expire._creationTime;
//this->_pTarget = expire._pTarget;
}
return *this;
}
bool notify(const void* sender)
{
if (!expired())
return this->_pDelegate->notify(sender);
else
return false;
}
bool equals(const AbstractDelegate<void>& other) const
{
return other.equals(*_pDelegate);
}
AbstractDelegate<void>* clone() const
{
return new Expire(*this);
}
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void disable()
{
_pDelegate->disable();
}
const AbstractDelegate<void>* unwrap() const
{
return this->_pDelegate;
}
protected:
bool expired() const
{
return _creationTime.isElapsed(_expire);
}
AbstractDelegate<void>* _pDelegate;
Timestamp::TimeDiff _expire;
Timestamp _creationTime;
private:
Expire();
};
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} // namespace Poco
#endif // Foundation_Expire_INCLUDED