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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
*/
#include <config.h>
#include <plugin/slave/replication_slave.h>
#include <drizzled/errmsg_print.h>
#include <drizzled/program_options/config_file.h>
#include <boost/lexical_cast.hpp>
#include <boost/program_options.hpp>
#include <fstream>
#include <drizzled/plugin.h>
using namespace std;
using namespace drizzled;
namespace po= boost::program_options;
namespace slave
{
void ReplicationSlave::startup(Session &session)
{
(void)session;
if (not initWithConfig())
{
errmsg_printf(error::ERROR, _("Could not start slave services: %s\n"),
_error.c_str());
}
else
{
/* Start the IO threads */
boost::unordered_map<uint32_t, Master *>::const_iterator it;
for (it= _masters.begin(); it != _masters.end(); ++it)
{
it->second->start();
/* Consumer must know server IDs */
_consumer.addMasterId(it->first);
}
_consumer_thread= boost::thread(&QueueConsumer::run, &_consumer);
}
}
bool ReplicationSlave::initWithConfig()
{
po::variables_map vm;
po::options_description slave_options("Options for the slave plugin");
/* Common options */
slave_options.add_options()
("seconds-between-reconnects", po::value<uint32_t>()->default_value(30))
("io-thread-sleep", po::value<uint32_t>()->default_value(5))
("applier-thread-sleep", po::value<uint32_t>()->default_value(5))
("ignore-errors", po::value<bool>()->default_value(false)->zero_tokens());
/* Master defining options */
for (size_t num= 1; num <= 10; num++)
{
string section("master");
section.append(boost::lexical_cast<string>(num));
slave_options.add_options()
((section + ".master-host").c_str(), po::value<string>()->default_value(""))
((section + ".master-port").c_str(), po::value<uint16_t>()->default_value(3306))
((section + ".master-user").c_str(), po::value<string>()->default_value(""))
((section + ".master-pass").c_str(), po::value<string>()->default_value(""))
((section + ".max-reconnects").c_str(), po::value<uint32_t>()->default_value(10))
((section + ".max-commit-id").c_str(), po::value<uint64_t>());
}
ifstream cf_stream(_config_file.c_str());
if (not cf_stream.is_open())
{
_error= "Unable to open file ";
_error.append(_config_file);
return false;
}
po::store(drizzled::program_options::parse_config_file(cf_stream, slave_options), vm);
po::notify(vm);
/*
* We will support 10 masters. This loope effectively creates the Master
* objects as they are referenced.
*
* @todo Support a variable number of master hosts.
*/
for (size_t num= 1; num <= 10; num++)
{
string section("master");
section.append(boost::lexical_cast<string>(num));
/* WARNING! Hack!
* We need to be able to determine when a master host is actually defined
* by the user vs. we are just using defaults. So if the hostname is ever
* the default value of "", then we'll assume that this section was not
* user defined.
*/
if (vm[section + ".master-host"].as<string>() == "")
continue;
_masters[num]= new (std::nothrow) Master(num);
if (vm.count(section + ".master-host"))
master(num).producer().setMasterHost(vm[section + ".master-host"].as<string>());
if (vm.count(section + ".master-port"))
master(num).producer().setMasterPort(vm[section + ".master-port"].as<uint16_t>());
if (vm.count(section + ".master-user"))
master(num).producer().setMasterUser(vm[section + ".master-user"].as<string>());
if (vm.count(section + ".master-pass"))
master(num).producer().setMasterPassword(vm[section + ".master-pass"].as<string>());
if (vm.count(section + ".max-commit-id"))
master(num).producer().setCachedMaxCommitId(vm[section + ".max-commit-id"].as<uint64_t>());
}
boost::unordered_map<uint32_t, Master *>::const_iterator it;
for (it= _masters.begin(); it != _masters.end(); ++it)
{
if (vm.count("max-reconnects"))
it->second->producer().setMaxReconnectAttempts(vm["max-reconnects"].as<uint32_t>());
if (vm.count("seconds-between-reconnects"))
it->second->producer().setSecondsBetweenReconnects(vm["seconds-between-reconnects"].as<uint32_t>());
if (vm.count("io-thread-sleep"))
it->second->producer().setSleepInterval(vm["io-thread-sleep"].as<uint32_t>());
}
if (vm.count("applier-thread-sleep"))
_consumer.setSleepInterval(vm["applier-thread-sleep"].as<uint32_t>());
if (vm.count("ignore-errors"))
_consumer.setIgnoreErrors(vm["ignore-errors"].as<bool>());
/* setup schema and tables */
ReplicationSchema rs;
if (not rs.create())
{
_error= rs.getErrorMessage();
return false;
}
for (it= _masters.begin(); it != _masters.end(); ++it)
{
/* make certain a row exists for each master */
rs.createInitialApplierRow(it->first);
rs.createInitialIORow(it->first);
uint64_t cachedValue= it->second->producer().cachedMaxCommitId();
if (cachedValue)
{
if (not rs.setInitialMaxCommitId(it->first, cachedValue))
{
_error= rs.getErrorMessage();
return false;
}
}
}
return true;
}
} /* namespace slave */
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