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130 lines
4.2 KiB
130 lines
4.2 KiB
#if MYSQL_6_9
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// Copyright (c) 2004, 2016 Oracle and/or its affiliates. All rights reserved.
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//
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// MySQL Connector/NET is licensed under the terms of the GPLv2
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// <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
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// MySQL Connectors. There are special exceptions to the terms and
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// conditions of the GPLv2 as it is applied to this software, see the
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// FLOSS License Exception
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// <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published
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// by the Free Software Foundation; version 2 of the License.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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using System;
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using System.Data;
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namespace Externals.MySql.Data.MySqlClient
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{
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internal sealed partial class MySqlTransaction : IDisposable
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{
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private IsolationLevel level;
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private MySqlConnection conn;
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private bool open;
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private bool disposed = false;
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internal MySqlTransaction(MySqlConnection c, IsolationLevel il)
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{
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conn = c;
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level = il;
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open = true;
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}
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#region Destructor
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~MySqlTransaction()
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{
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Dispose(false);
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}
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#endregion
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#region Properties
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/// <summary>
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/// 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.
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/// </summary>
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/// <value>The <see cref="MySqlConnection"/> object associated with this transaction.</value>
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/// <remarks>
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/// A single application may have multiple database connections, each
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/// with zero or more transactions. This property enables you to
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/// determine the connection object associated with a particular
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/// transaction created by <see cref="MySqlConnection.BeginTransaction()"/>.
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/// </remarks>
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public new MySqlConnection Connection
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{
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get { return conn; }
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}
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/// <summary>
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/// Specifies the <see cref="IsolationLevel"/> for this transaction.
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/// </summary>
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/// <value>
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/// The <see cref="IsolationLevel"/> for this transaction. The default is <b>ReadCommitted</b>.
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/// </value>
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/// <remarks>
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/// Parallel transactions are not supported. Therefore, the IsolationLevel
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/// applies to the entire transaction.
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/// </remarks>
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public override IsolationLevel IsolationLevel
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{
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get { return level; }
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}
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#endregion
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public new void Dispose()
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{
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Dispose(true);
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GC.SuppressFinalize(this);
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}
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protected override void Dispose(bool disposing)
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{
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if (disposed) return;
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base.Dispose(disposing);
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if (disposing)
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{
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if ((conn != null && conn.State == ConnectionState.Open || conn.SoftClosed) && open)
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Rollback();
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}
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disposed = true;
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}
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public override void Commit()
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{
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if (conn == null || (conn.State != ConnectionState.Open && !conn.SoftClosed))
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throw new InvalidOperationException("Connection must be valid and open to commit transaction");
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if (!open)
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throw new InvalidOperationException("Transaction has already been committed or is not pending");
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MySqlCommand cmd = new MySqlCommand("COMMIT", conn);
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cmd.ExecuteNonQuery();
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open = false;
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}
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public override void Rollback()
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{
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if (conn == null || (conn.State != ConnectionState.Open && !conn.SoftClosed))
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throw new InvalidOperationException("Connection must be valid and open to rollback transaction");
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if (!open)
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throw new InvalidOperationException("Transaction has already been rolled back or is not pending");
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MySqlCommand cmd = new MySqlCommand("ROLLBACK", conn);
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cmd.ExecuteNonQuery();
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open = false;
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}
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}
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}
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#endif
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