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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2011 David Shrewsbury
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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
*/
#pragma once
#include <drizzled/internal/my_pthread.h>
namespace slave
{
/**
* Interface for threads interacting with the replication queue.
*
* This class uses the Template Method design pattern to define the set of
* steps for a thread operating on the replication queue. An implementing
* class need only implement the init(), process(), and/or shutdown() methods.
* The implementing class need only pass run() method to thread initialization.
*/
class QueueThread
{
public:
virtual ~QueueThread()
{}
void run(void);
/**
* Do any initialization work.
*
* @retval true Success
* @retval false Failure
*/
virtual bool init()
{
return true;
}
/**
* Work to do at thread shutdown time.
*/
virtual void shutdown()
{}
/**
* Method that actually does the work around the queue.
*
* Returning 'false' from this method currently causes the thread to
* shutdown.
*
* @retval true Success
* @retval false Failure
*/
virtual bool process()= 0;
virtual uint32_t getSleepInterval()= 0;
};
} /* namespace slave */
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