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// ByteFX.Data data access components for .Net
// Copyright (C) 2002-2003 ByteFX, Inc.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
using System;
using System.Data;
namespace ByteFX.Data.MySqlClient
{
/// <summary>
/// Represents a SQL transaction to be made in a MySQL database. This class cannot be inherited.
/// </summary>
/// <include file='docs/MySqlTransaction.xml' path='MyDocs/MyMembers[@name="Class"]/*'/>
public sealed class MySqlTransaction : IDbTransaction
{
private IsolationLevel _level;
private MySqlConnection _conn;
private bool _open;
internal MySqlTransaction()
{
_open = true;
}
#region Properties
/// <summary>
/// Gets the <see cref="MySqlConnection"/> object associated with the transaction, or a null reference (Nothing in Visual Basic) if the transaction is no longer valid.
/// </summary>
public IDbConnection Connection
{
get { return _conn; }
set { _conn = (MySqlConnection)value; }
}
/// <summary>
/// Specifies the <see cref="IsolationLevel"/> for this transaction.
/// </summary>
public IsolationLevel IsolationLevel
{
get { return _level; }
set { _level = value; }
}
#endregion
void System.IDisposable.Dispose()
{
}
/// <summary>
/// Commits the database transaction.
/// </summary>
public void Commit()
{
if (_conn == null || _conn.State != ConnectionState.Open)
throw new InvalidOperationException("Connection must be valid and open to commit transaction");
if (!_open)
throw new InvalidOperationException("Transaction has already been committed or is not pending");
Driver d = _conn.InternalConnection.Driver;
try
{
d.Send(DBCmd.QUERY, "COMMIT");
_open = false;
}
catch (MySqlException ex)
{
throw ex;
}
}
/// <summary>
/// Overloaded. Rolls back a transaction from a pending state.
/// </summary>
public void Rollback()
{
if (_conn == null || _conn.State != ConnectionState.Open)
throw new InvalidOperationException("Connection must be valid and open to commit transaction");
if (!_open)
throw new InvalidOperationException("Transaction has already been rolled back or is not pending");
Driver d = _conn.InternalConnection.Driver;
try
{
d.Send(DBCmd.QUERY, "ROLLBACK");
_open = false;
}
catch (MySqlException ex)
{
throw ex;
}
}
}
}
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