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122 lines
3.3 KiB
C++
122 lines
3.3 KiB
C++
//
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// PooledSessionHolder.h
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//
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// $Id: //poco/Main/Data/include/Poco/Data/PooledSessionHolder.h#1 $
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//
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// Library: Data
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// Package: SessionPooling
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// Module: PooledSessionHolder
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//
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// Definition of the PooledSessionHolder class.
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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 Data_PooledSessionHolder_INCLUDED
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#define Data_PooledSessionHolder_INCLUDED
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#include "Poco/Data/Data.h"
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#include "Poco/Data/SessionImpl.h"
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#include "Poco/AutoPtr.h"
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#include "Poco/Timestamp.h"
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#include "Poco/Mutex.h"
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namespace Poco {
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namespace Data {
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class SessionPool;
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class Data_API PooledSessionHolder: public Poco::RefCountedObject
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/// This class is used by SessionPool to manage SessionImpl objects.
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{
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public:
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PooledSessionHolder(SessionPool& owner, SessionImpl* pSessionImpl);
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/// Creates the PooledSessionHolder.
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~PooledSessionHolder();
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/// Destroys the PooledSessionHolder.
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SessionImpl* session();
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/// Returns a pointer to the SessionImpl.
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SessionPool& owner();
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/// Returns a reference to the SessionHolder's owner.
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void access();
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/// Updates the last access timestamp.
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int idle() const;
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/// Returns the number of seconds the session has not been used.
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private:
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SessionPool& _owner;
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Poco::AutoPtr<SessionImpl> _pImpl;
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Poco::Timestamp _lastUsed;
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mutable Poco::FastMutex _mutex;
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};
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//
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// inlines
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//
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inline SessionImpl* PooledSessionHolder::session()
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{
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return _pImpl;
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}
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inline SessionPool& PooledSessionHolder::owner()
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{
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return _owner;
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}
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inline void PooledSessionHolder::access()
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{
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Poco::FastMutex::ScopedLock lock(_mutex);
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_lastUsed.update();
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}
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inline int PooledSessionHolder::idle() const
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{
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Poco::FastMutex::ScopedLock lock(_mutex);
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return (int) (_lastUsed.elapsed()/Poco::Timestamp::resolution());
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}
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} } // namespace Poco::Data
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#endif // Data_PooledSessionHolder_INCLUDED
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