add ping and update isConnected now pinging mysql server, instead returning bool value

src/cpp/MySQL/Poco/SessionHandle.h

@@ -65,6 +65,10 @@ public:
 	void rollback();
 		/// Rollback transaction
 
+	int ping();
+		/// ping to check if connection is currently active
+
+
 	operator MYSQL* ();
 
 private:

src/cpp/MySQL/Poco/SessionImpl.h

@@ -24,6 +24,7 @@
 #include "StatementExecutor.h"
 #include "ResultMetadata.h"
 #include "Poco/Mutex.h"
+#include "Poco/Timestamp.h"
 
 
 namespace Poco {
@@ -122,6 +123,8 @@ public:
 	const std::string& connectorName() const;
 		/// Returns the name of the connector.
 
+	inline void updateTimestamp() { _timestampLastActivity = Poco::Timestamp(); }
+
 private:
 
 	template <typename T>
@@ -157,6 +160,7 @@ private:
 	bool            _inTransaction;
 	std::size_t     _timeout;
 	Poco::FastMutex _mutex;
+	Poco::Timestamp _timestampLastActivity;
 };
 
 
@@ -204,11 +208,6 @@ inline bool SessionImpl::isTransactionIsolation(Poco::UInt32 ti)
 }
 
 	
-inline bool SessionImpl::isConnected()
-{
-	return _connected;
-}
-	
 
 inline std::size_t SessionImpl::getConnectionTimeout()
 {

src/cpp/MySQL/SessionHandle.cpp

@@ -175,5 +175,9 @@ void SessionHandle::rollback()
 		throw TransactionException("Rollback failed.", _pHandle);
 }
 
+int SessionHandle::ping() 
+{
+	return mysql_ping(_pHandle);
+}
 
 }}} // Poco::Data::MySQL

src/cpp/MySQL/SessionImpl.cpp

@@ -150,6 +150,7 @@ void SessionImpl::open(const std::string& connect)
 		&SessionImpl::isAutoCommit);
 
 	_connected = true;
+	_timestampLastActivity = Poco::Timestamp();
 }
 	
 
@@ -174,6 +175,7 @@ void SessionImpl::begin()
 
 	_handle.startTransaction();
 	_inTransaction = true;
+	_timestampLastActivity = Poco::Timestamp();
 }
 
 
@@ -181,6 +183,7 @@ void SessionImpl::commit()
 {
 	_handle.commit();
 	_inTransaction = false;
+	_timestampLastActivity = Poco::Timestamp();
 }
 	
 
@@ -188,6 +191,7 @@ void SessionImpl::rollback()
 {
 	_handle.rollback();
 	_inTransaction = false;
+	_timestampLastActivity = Poco::Timestamp();
 }
 
 
@@ -196,6 +200,7 @@ void SessionImpl::autoCommit(const std::string&, bool val)
 	StatementExecutor ex(_handle);
 	ex.prepare(Poco::format("SET autocommit=%d", val ? 1 : 0));
 	ex.execute();
+	_timestampLastActivity = Poco::Timestamp();
 }
 
 
@@ -206,6 +211,27 @@ bool SessionImpl::isAutoCommit(const std::string&)
 }
 
 
+
+bool SessionImpl::isConnected()
+{
+	return !_handle.ping();
+	/*
+	if (Poco::Timestamp() > _timestampLastActivity + Poco::Timespan(_timeout, 0)) {
+		return _connected;
+	}
+	else {
+		_timestampLastActivity = Poco::Timestamp();
+		if (!_handle.ping()) {
+			return true;
+		}
+		else {
+			return false;
+		}
+	}
+	*/
+}
+
+
 void SessionImpl::setTransactionIsolation(Poco::UInt32 ti)
 {
 	std::string isolation;