/// <summary>
/// Executes this statement in the context of the given session,
/// returning a single, scalar value.
/// </summary>
/// <param name="session">The session.</param>
/// <returns>
/// a scalar value.
/// </returns>
internal object ExecuteScalar(HsqlSession session)
{
return(session.ExecuteScalarPrepared(m_request));
}
/// <summary>
/// Notifies the given session that it
/// may release any resources dedicated
/// to maintaing the prepared form of
/// this statement.
/// </summary>
/// <param name="session">To notify</param>
internal void Free(HsqlSession session)
{
session.FreeStatement(m_statementId);
}
/// <summary>
/// Executes a batch request in the context of the specified session.
/// </summary>
/// <param name="session">The session.</param>
/// <returns>
/// </returns>
internal int[] ExecuteBatch(HsqlSession session)
{
return(session.Execute(m_batchRequest).getUpdateCounts());
}
/// <summary>
/// Executes this statement in the context of the given session,
/// returning the number of rows affected.
/// </summary>
/// <param name="session">The session.</param>
/// <returns>The number of rows affected.</returns>
internal int ExecuteNonQuery(HsqlSession session)
{
return(session.ExecuteNonQueryPrepared(m_request));
}
/// <summary>
/// Notifies the given session that it
/// may release any resources dedicated
/// to maintaing the prepared form of
/// this statement.
/// </summary>
/// <param name="session">To notify</param>
internal void Free(HsqlSession session)
{
session.FreeStatement(m_statementId);
}
/// <summary>
/// Executes this statement in the context of the specified session.
/// </summary>
/// <param name="session">The session.</param>
/// <returns>
/// A response encapsulating the result of execution.
/// </returns>
internal Response Execute(HsqlSession session)
{
return(session.Execute(m_request));
}
/// <summary>
/// Executes this statement in the context of the given session,
/// returning the number of rows affected.
/// </summary>
/// <param name="session">The session.</param>
/// <returns>The number of rows affected.</returns>
internal int ExecuteNonQuery(HsqlSession session)
{
return session.ExecuteNonQueryPrepared(m_request);
}
/// <summary>
/// Executes this statement in the context of the given session,
/// returning a single, scalar value.
/// </summary>
/// <param name="session">The session.</param>
/// <returns>
/// a scalar value.
/// </returns>
internal object ExecuteScalar(HsqlSession session)
{
return session.ExecuteScalarPrepared(m_request);
}
/// <summary>
/// Executes a batch request in the context of the specified session.
/// </summary>
/// <param name="session">The session.</param>
/// <returns>
/// </returns>
internal int[] ExecuteBatch(HsqlSession session)
{
return session.Execute(m_batchRequest).getUpdateCounts();
}
/// <summary>
/// Executes this statement in the context of the specified session.
/// </summary>
/// <param name="session">The session.</param>
/// <returns>
/// A response encapsulating the result of execution.
/// </returns>
internal Response Execute(HsqlSession session)
{
return session.Execute(m_request);
}
void OpenSessionTimeout(int timeout)
{
Exception se = null;
Thread thread = new Thread(delegate()
{
try
{
OpenSessionNoTimeout();
}
catch (Exception ex)
{
se = ex;
}
});
try
{
thread.Start();
thread.Join(timeout);
}
catch (Exception)
{
m_session = null;
SetStateInternal(ConnectionState.Closed);
throw;
}
if (se != null)
{
m_session = null;
SetStateInternal(ConnectionState.Closed);
throw se;
}
else if (m_session == null)
{
SetStateInternal(ConnectionState.Closed);
throw new TimeoutException(string.Format(
"Connection attempt aborted after {0} milliseconds",
(timeout == Threading.Timeout.Infinite) ? "Infinite"
: timeout.ToString("N")));
}
}
private void OpenSessionNoTimeout()
{
SetStateInternal(ConnectionState.Connecting);
try
{
m_session = HsqlDriver.GetSession(m_settings);
SetStateInternal(ConnectionState.Open);
#if SYSTRAN
if (m_settings.Enlist)
{
Transaction tx = Transaction.Current;
if (tx != null)
{
EnlistTransaction(tx);
}
}
#endif
}
catch (Exception)
{
m_session = null;
SetStateInternal(ConnectionState.Closed);
throw;
}
}
/// <summary>
/// Closes this connection.
/// </summary>
internal void CloseInternal()
{
ConnectionState state = m_connectionState;
if (state == ConnectionState.Closed)
{
return;
}
HsqlSession session = m_session;
if (m_session == null)
{
// Sanity-Check: Should never happen.
throw new InvalidOperationException(
"HsqlSession is null"); // NOI18N
}
// Handle dispose/close while enlisted in a system transaction.
HsqlTransaction transaction = m_transaction;
HsqlEnlistment enlistment = m_enlistment;
bool enlisted = (enlistment != null);
bool preserveEnlistment = (enlisted && !enlistment.m_disposeConnection);
if (preserveEnlistment)
{
#if DEBUG
// Without this, it is difficult to debug
// because the m_enlistment's connection
// ceases to be this one and this connection
// loses its reference to the enlistment
// (m_enlistment is set null below).
m_enlistment_dbg = m_enlistment;
#endif
// ...then until it ceases to participate in a
// System.Transactions.Transaction, the enlistment
// needs a valid local transaction to commit or
// rollback
HsqlConnection connection = new HsqlConnection(this);
connection.m_connectionState = ConnectionState.Open;
connection.m_session = session;
connection.m_enlistment = enlistment;
connection.m_transaction = transaction;
enlistment.m_dbConnection = connection;
enlistment.m_disposeConnection = true;
if (transaction != null)
{
transaction.m_connection = connection;
}
}
SetStateInternal(ConnectionState.Closed);
m_session = null;
m_transaction = null;
m_enlistment = null;
m_dbMetaData = null;
m_settings = null;
if (!enlisted)
{
// No need to roll back here. This will happen automatically
// a moment later on the back end in response to the
// session.Close() call below.
if (transaction != null)
{
transaction.DisposeInternal(/*rollback*/false);
}
// release the back-end session and any associated resources,
// such as network sockets, etc.
session.Close();
}
}
