class/Npgsql/Npgsql/NpgsqlConnectedState.cs

   1 // Npgsql.NpgsqlConnectedState.cs
   2 //
   3 // Author:
   4 //      Dave Joyner <d4ljoyn@yahoo.com>
   5 //
   6 //      Copyright (C) 2002 The Npgsql Development Team
   7 //      npgsql-general@gborg.postgresql.org
   8 //      http://gborg.postgresql.org/project/npgsql/projdisplay.php
   9 //
  10 //
  11 // This library is free software; you can redistribute it and/or
  12 // modify it under the terms of the GNU Lesser General Public
  13 // License as published by the Free Software Foundation; either
  14 // version 2.1 of the License, or (at your option) any later version.
  15 //
  16 // This library is distributed in the hope that it will be useful,
  17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19 // Lesser General Public License for more details.
  20 //
  21 // You should have received a copy of the GNU Lesser General Public
  22 // License along with this library; if not, write to the Free Software
  23 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24
  25 using System;
  26 using System.IO;
  27
  28
  29 namespace Npgsql
  30 {
  31     internal sealed class NpgsqlConnectedState : NpgsqlState
  32     {
  33
  34         private static NpgsqlConnectedState _instance = null;
  35
  36         private NpgsqlConnectedState()
  37         {}
  38
  39         public static NpgsqlConnectedState Instance
  40         {
  41             get
  42             {
  43                 if ( _instance == null )
  44                 {
  45                     _instance = new NpgsqlConnectedState();
  46                 }
  47                 return _instance;
  48             }
  49         }
  50
  51         public override void Startup(NpgsqlConnector context)
  52         {
  53             NpgsqlStartupPacket startupPacket  = new NpgsqlStartupPacket(296, //Not used.
  54                                                   context.BackendProtocolVersion,
  55                                                   context.Database,
  56                                                   context.UserName,
  57                                                   "",
  58                                                   "",
  59                                                   "");
  60
  61             startupPacket.WriteToStream( new BufferedStream(context.Stream), context.Encoding );
  62             context.Mediator.RequireReadyForQuery = false;
  63             context.Mediator.CommandTimeout = 20;
  64             context.Stream.Flush();
  65             ProcessBackendResponses( context );
  66         }
  67
  68         public override void CancelRequest(NpgsqlConnector context)
  69         {
  70             NpgsqlCancelRequest CancelRequestMessage = new NpgsqlCancelRequest(context.BackEndKeyData);
  71
  72
  73             CancelRequestMessage.WriteToStream(context.Stream, context.Encoding);
  74
  75
  76         }
  77
  78     }
  79 }