plugin_connection_handler.h

#ifndef PLUGIN_CONNECTION_HANDLER_INCLUDED
#define PLUGIN_CONNECTION_HANDLER_INCLUDED

/*
   Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#include "mysql/thread_pool_priv.h"       // Plugin_connection_handler_functions
#include "conn_handler/connection_handler.h"  // Connection_handler

class THD;


/**
   This is a wrapper class around global free functions implemented
   by connection handler plugins (e.g. thread pool). So instead of
   plugins implementing a Connection_handler subclass, they supply
   a set of function pointers to my_connection_handler_set() which
   instantiates Plugin_connection_handler.

   @see Connection_handler_functions struct.
*/

class Plugin_connection_handler : public Connection_handler
{
  Connection_handler_functions *m_functions;

  Plugin_connection_handler(const Plugin_connection_handler&);
  Plugin_connection_handler&
    operator=(const Plugin_connection_handler&);

public:
  Plugin_connection_handler(Connection_handler_functions *functions)
  : m_functions(functions)
  {}

  virtual ~Plugin_connection_handler()
  {
    m_functions->end();
  }

protected:
  virtual bool add_connection(Channel_info* channel_info)
  {
    return m_functions->add_connection(channel_info);
  }

  virtual uint get_max_threads() const
  {
    return m_functions->max_threads;
  }
};

#endif // PLUGIN_CONNECTION_HANDLER_INCLUDED