release/src/router/mysql/server-tools/instance-manager/command.h

   1 #ifndef INCLUDES_MYSQL_INSTANCE_MANAGER_COMMAND_H
   2 #define INCLUDES_MYSQL_INSTANCE_MANAGER_COMMAND_H
   3 /* Copyright (c) 2004-2006 MySQL AB
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; version 2 of the License.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA */
  17
  18 #include <my_global.h>
  19
  20 #if defined(__GNUC__) && defined(USE_PRAGMA_INTERFACE)
  21 #pragma interface
  22 #endif
  23
  24 /* Class responsible for allocation of IM commands. */
  25
  26 class Guardian;
  27 class Instance_map;
  28
  29 struct st_net;
  30
  31 /*
  32   Command - entry point for any command.
  33   GangOf4: 'Command' design pattern
  34 */
  35
  36 class Command
  37 {
  38 public:
  39   Command();
  40   virtual ~Command();
  41
  42   /*
  43     This operation incapsulates behaviour of the command.
  44
  45     SYNOPSIS
  46       net             The network connection to the client.
  47       connection_id   Client connection ID
  48
  49     RETURN
  50       0               On success
  51       non 0           On error. Client error code is returned.
  52   */
  53   virtual int execute(st_net *net, ulong connection_id) = 0;
  54
  55 protected:
  56   Guardian *guardian;
  57   Instance_map *instance_map;
  58 };
  59
  60 #endif /* INCLUDES_MYSQL_INSTANCE_MANAGER_COMMAND_H */