} // close
/*
** Name: cancel
**
** Description:
** Issues an interrupt to the Data Access Server which
** will attempt to cancel any active query.
**
** Input:
** None.
**
** Output:
** None.
**
** Returns:
** void.
**
** History:
** 4-Nov-99 (gordy)
** Created.
** 26-Dec-02 (gordy)
** Allocate cncl buffer on first request.
*/
public virtual void cancel()
{
lock (this)
{
/*
** Allocate cancel buffer on first request.
*/
if (cncl == null)
{
try
{
// wrap the socket's NetworkStream in our OutputStream
OutputStream outputStream = new OutputStream(socket.GetStream());
cncl = new OutBuff(outputStream, ConnID, 16);
cncl.TL_ProtocolLevel = this.TL_ProtocolLevel;
}
catch (Exception ex)
{
if (trace.enabled(1))
{
trace.write(title + ": error creating cancel buffer: " +
ex.Message);
}
disconnect();
throw SqlEx.get(ERR_GC4001_CONNECT_ERR, ex);
}
}
try
{
if (trace.enabled(2))
{
trace.write(title + ": interrupt network connection");
}
cncl.begin(DAM_TL_INT, 0);
cncl.flush();
}
catch (SqlEx ex)
{
disconnect();
throw ex;
}
return;
}
} // cancel
} // MsgConn
/*
** Name: disconnect
**
** Description:
** Disconnect from server and free all I/O resources.
**
** Input:
** None.
**
** Output:
** None.
**
** Returns:
** void
**
** History:
** 7-Jun-99 (gordy)
** Created.
** 17-Nov-99 (gordy)
** Extracted I/O functionality to DbConnIo, DbConnOut, DbConnIn.*/
protected internal override void disconnect()
{
/*
** We don't set the I/O buffer reference to null
** here so that we don't have to check it on each
** use. I/O buffer functions will continue to work
** until a request results in a stream I/O request,
** in which case an exception will be thrown by the
** I/O buffer.
**
** We must, however, test the reference for null
** since we may be called by the constructor with
** a null cancel buffer.
*/
if (cncl != null)
{
try { cncl.close(); }
catch (Exception) {}
finally { cncl = null; }
}
base.disconnect();
return;
} // disconnect
private ITrace trace; // Tracing.
#endregion Fields
#region Constructors
/*
** Name: Ucs2SegWtr
**
** Description:
** Class constructor.
**
** Input:
** None.
**
** Output:
** None.
**
** Returns:
** None.
**
** History:
** 1-Dec-03 (gordy)
** Created.
** 1-Oct-06 (thoda04)
** Ported to .NET
*/
public Ucs2SegWtr(MsgOut msg_out, OutBuff outBuff, ITrace trace)
{
title = "Ucs2SegWtr[" + msg_out.ConnID + "]";
this.trace = trace;
this.msg_out = msg_out;
this.outBuff = outBuff;
}
private ITrace trace; // Tracing.
#endregion Fields
#region Constructors
/*
** Name: ByteSegOS
**
** Description:
** Class constructor.
**
** Input:
** msg_out Message layer output.
** outBuff Buffered output stream.
** trace Tracing.
**
** Output:
** None.
**
** Returns:
** None.
**
** History:
** 29-Sep-99 (gordy)
** Created.
** 17-Nov-99 (gordy)
** Removed msg parameter when class nested.
** 10-May-01 (gordy)
** Added msg_out parameter when class made static.*/
/// <summary>
/// Class constructor for converting byte stream into
/// segmented output stream.
/// </summary>
/// <param name="msg_out">Message layer output.</param>
/// <param name="outBuff">Buffered output stream.</param>
/// <param name="trace">Tracing</param>
public ByteSegOS(MsgOut msg_out, OutBuff outBuff, ITrace trace)
: base(outBuff.outputStream)
{
title = "ByteSegOS[" + msg_out.ConnID + "]";
this.trace = trace;
this.msg_out = msg_out;
this.outBuff = outBuff;
ba = new byte[1];
}
/*
** Name: connect
**
** Description:
** Connect to target server. Initializes the output buffer.
**
** Input:
** host Host name or address.
** portID Symbolic or numeric port ID.
**
** Output:
** None.
**
** Returns:
** void.
**
** History:
** 7-Jun-99 (gordy)
** Created.
** 17-Nov-99 (gordy)
** Extracted output functionality from DbConn.
** 3-Nov-08 (gordy, ported by thoda04)
** Extracted from constructor.
*/
protected internal override void connect(String host, String portID)
{
base.connect( host, portID );
try
{
// wrap the socket's NetworkStream in our OutputStream
OutputStream outputStream = new OutputStream(socket.GetStream());
outBuff = new OutBuff(outputStream, ConnID, 1 << DAM_TL_PKT_MIN);
}
catch (System.Exception ex)
{
if (trace.enabled(1))
trace.write(title + ": error creating output buffer: " + ex.Message);
disconnect();
throw SqlEx.get(ERR_GC4001_CONNECT_ERR, ex);
}
return;
}
/*
** Name: disconnect
**
** Description:
** Disconnect from server and free all I/O resources.
**
** Input:
** None.
**
** Output:
** None.
**
** Returns:
** void
**
** History:
** 7-Jun-99 (gordy)
** Created.
** 17-Nov-99 (gordy)
** Extracted I/O functionality to DbConnIo, DbConnOut, DbConnIn.*/
protected internal override void disconnect()
{
/*
** We don't set the I/O buffer reference to null
** here so that we don't have to check it on each
** use. I/O buffer functions will continue to work
** until a request results in a stream I/O request,
** in which case an exception will be thrown by the
** I/O buffer.
**
** We must, however, test the reference for null
** since we may be called by the constructor with
** a null cancel buffer.
*/
if (cncl != null)
{
try { cncl.close(); }
catch( Exception ) {}
finally { cncl = null; }
}
base.disconnect();
return ;
}
/*
** Name: cancel
**
** Description:
** Issues an interrupt to the Data Access Server which
** will attempt to cancel any active query.
**
** Input:
** None.
**
** Output:
** None.
**
** Returns:
** void.
**
** History:
** 4-Nov-99 (gordy)
** Created.
** 26-Dec-02 (gordy)
** Allocate cncl buffer on first request.
*/
public virtual void cancel()
{
lock(this)
{
/*
** Allocate cancel buffer on first request.
*/
if ( cncl == null )
try
{
// wrap the socket's NetworkStream in our OutputStream
OutputStream outputStream = new OutputStream(socket.GetStream());
cncl = new OutBuff(outputStream, ConnID, 16);
cncl.TL_ProtocolLevel = this.TL_ProtocolLevel;
}
catch( Exception ex )
{
if ( trace.enabled( 1 ) )
trace.write( title + ": error creating cancel buffer: " +
ex.Message );
disconnect();
throw SqlEx.get( ERR_GC4001_CONNECT_ERR, ex );
}
try
{
if ( trace.enabled( 2 ) )
trace.write( title + ": interrupt network connection" );
cncl.begin( DAM_TL_INT, 0 );
cncl.flush();
}
catch( SqlEx ex )
{
disconnect();
throw ex;
}
return;
}
}