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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 <plugin/slave/queue_consumer.h>
#include <plugin/slave/queue_producer.h>
#include <plugin/slave/replication_schema.h>
#include <drizzled/plugin/daemon.h>
#include <boost/thread.hpp>
#include <boost/unordered_map.hpp>
namespace drizzled
{
class Session;
}
namespace slave
{
class ReplicationSlave : public drizzled::plugin::Daemon
{
public:
ReplicationSlave(const std::string &config)
: drizzled::plugin::Daemon("Replication Slave"),
_config_file(config)
{}
~ReplicationSlave()
{
_consumer_thread.interrupt();
boost::unordered_map<uint32_t, Master *>::const_iterator it;
for (it= _masters.begin(); it != _masters.end(); ++it)
{
it->second->thread().interrupt();
}
}
/** Gets called after all plugins are initialized */
void startup(drizzled::Session &session);
private:
/**
* Class representing a master server.
*/
class Master
{
public:
Master(uint32_t id)
{
_producer.setMasterId(id);
}
QueueProducer &producer()
{
return _producer;
}
boost::thread &thread()
{
return _producer_thread;
}
void start()
{
_producer_thread= boost::thread(&QueueProducer::run, &_producer);
}
private:
/** Manages a single master */
QueueProducer _producer;
/** I/O thread that will populate the work queue */
boost::thread _producer_thread;
};
/** Configuration file containing master info */
std::string _config_file;
std::string _error;
/** Object to use with the consumer thread */
QueueConsumer _consumer;
/**
* Applier thread that will drain the work queue.
* @todo Support more than one consumer thread.
*/
boost::thread _consumer_thread;
/** List of master objects, one per master */
boost::unordered_map<uint32_t, Master *> _masters;
/** Convenience method to get object reference */
Master &master(size_t index)
{
return *(_masters[index]);
}
/**
* Initialize slave services with the given configuration file.
*
* In case of an error during initialization, _error contains a
* string describing what went wrong.
*
* @retval true Success
* @retval false Failure
*/
bool initWithConfig();
};
} /* namespace slave */
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