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//
// System.Data.Odbc.OdbcTransaction
//
// Authors:
// Brian Ritchie (brianlritchie@hotmail.com)
//
// Copyright (C) Brian Ritchie, 2002
//
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Data;
#if NET_2_0
using System.Data.Common;
#endif // NET_2_0
namespace System.Data.Odbc
{
#if NET_2_0
public sealed class OdbcTransaction : DbTransaction
#else
public sealed class OdbcTransaction : MarshalByRefObject, IDbTransaction
#endif // NET_2_0
{
private bool disposed = false;
private OdbcConnection connection;
private IsolationLevel isolationlevel;
internal OdbcTransaction(OdbcConnection conn, IsolationLevel isolationlevel)
{
// Set Auto-commit (102) to false
OdbcReturn ret=libodbc.SQLSetConnectAttr(conn.hDbc, OdbcConnectionAttribute.AutoCommit, IntPtr.Zero, 0);
if ((ret!=OdbcReturn.Success) && (ret!=OdbcReturn.SuccessWithInfo))
throw new OdbcException(new OdbcError("SQLSetConnectAttr",OdbcHandleType.Dbc,conn.hDbc));
// Handle isolation level
int lev=0;
switch (isolationlevel)
{
case IsolationLevel.ReadUncommitted:
lev=1;
break;
case IsolationLevel.ReadCommitted:
lev=2;
break;
case IsolationLevel.RepeatableRead:
lev=3;
break;
case IsolationLevel.Serializable:
lev=4;
break;
case IsolationLevel.Unspecified:
lev=0;
break;
default:
throw new NotSupportedException();
}
libodbc.SQLSetConnectAttr(conn.hDbc, OdbcConnectionAttribute.TransactionIsolation, (IntPtr) lev, 0);
if ((ret!=OdbcReturn.Success) && (ret!=OdbcReturn.SuccessWithInfo))
throw new OdbcException(new OdbcError("SQLSetConnectAttr",OdbcHandleType.Dbc,conn.hDbc));
this.isolationlevel=isolationlevel;
connection=conn;
}
#region Implementation of IDisposable
#if NET_2_0
protected override
#endif
void Dispose(bool disposing) {
if (!disposed) {
if (disposing) {
Rollback();
}
disposed = true;
}
}
#if !NET_2_0
public
#endif
void Dispose() {
Dispose(true);
GC.SuppressFinalize(this);
}
#endregion Implementation of IDisposable
#region Implementation of IDbTransaction
public
#if NET_2_0
override
#endif //NET_2_0
void Commit()
{
if (connection.transaction==this)
{
OdbcReturn ret=libodbc.SQLEndTran((short) OdbcHandleType.Dbc, connection.hDbc, 0);
if ((ret!=OdbcReturn.Success) && (ret!=OdbcReturn.SuccessWithInfo))
throw new OdbcException(new OdbcError("SQLEndTran",OdbcHandleType.Dbc,connection.hDbc));
connection.transaction=null;
}
else
throw new InvalidOperationException();
}
public
#if NET_2_0
override
#endif //NET_2_0
void Rollback()
{
if (connection.transaction==this)
{
OdbcReturn ret=libodbc.SQLEndTran((short) OdbcHandleType.Dbc, connection.hDbc, 1);
if ((ret!=OdbcReturn.Success) && (ret!=OdbcReturn.SuccessWithInfo))
throw new OdbcException(new OdbcError("SQLEndTran",OdbcHandleType.Dbc,connection.hDbc));
connection.transaction=null;
}
else
throw new InvalidOperationException();
}
#if ONLY_1_1
IDbConnection IDbTransaction.Connection
{
get
{
return Connection;
}
}
#endif // ONLY_1_1
#if NET_2_0
protected override DbConnection DbConnection
{
get {return Connection;}
}
#endif // NET_2_0
public
#if NET_2_0
override
#endif //NET_2_0
IsolationLevel IsolationLevel
{
get
{
return isolationlevel;
}
}
#endregion Implementation of IDbTransaction
#region Public Instance Properties
#if ONLY_1_1
public OdbcConnection Connection
{
get
{
return connection;
}
}
#endif // ONLY_1_1
#endregion Public Instance Properties
}
}
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