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cos-cpp-sdk/third_party/include/Poco/Data/PooledSessionHolder.h

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+//
+// PooledSessionHolder.h
+//
+// Library: Data
+// Package: SessionPooling
+// Module:  PooledSessionHolder
+//
+// Definition of the PooledSessionHolder class.
+//
+// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Data_PooledSessionHolder_INCLUDED
+#define Data_PooledSessionHolder_INCLUDED
+
+
+#include "Poco/Data/Data.h"
+#include "Poco/Data/SessionImpl.h"
+#include "Poco/AutoPtr.h"
+#include "Poco/Timestamp.h"
+#include "Poco/Mutex.h"
+
+
+namespace Poco {
+namespace Data {
+
+
+class SessionPool;
+
+
+class Data_API PooledSessionHolder: public Poco::RefCountedObject
+	/// This class is used by SessionPool to manage SessionImpl objects.
+{
+public:
+	PooledSessionHolder(SessionPool& owner, SessionImpl* pSessionImpl);
+		/// Creates the PooledSessionHolder.
+
+	~PooledSessionHolder();
+		/// Destroys the PooledSessionHolder.
+
+	SessionImpl* session();
+		/// Returns a pointer to the SessionImpl.
+
+	SessionPool& owner();
+		/// Returns a reference to the SessionHolder's owner.
+
+	void access();
+		/// Updates the last access timestamp.
+
+	int idle() const;
+		/// Returns the number of seconds the session has not been used.
+
+private:
+	SessionPool& _owner;
+	Poco::AutoPtr<SessionImpl> _pImpl;
+	Poco::Timestamp _lastUsed;
+	mutable Poco::FastMutex _mutex;
+};
+
+
+//
+// inlines
+//
+inline SessionImpl* PooledSessionHolder::session()
+{
+	return _pImpl;
+}
+
+
+inline SessionPool& PooledSessionHolder::owner()
+{
+	return _owner;
+}
+
+
+inline void PooledSessionHolder::access()
+{
+	Poco::FastMutex::ScopedLock lock(_mutex);
+	
+	_lastUsed.update();
+}
+
+
+inline int PooledSessionHolder::idle() const
+{
+	Poco::FastMutex::ScopedLock lock(_mutex);
+
+	return (int) (_lastUsed.elapsed()/Poco::Timestamp::resolution());
+}
+
+
+} } // namespace Poco::Data
+
+
+#endif // Data_PooledSessionHolder_INCLUDED