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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2010 Marcus Eriksson
*
* Authors:
*
* Marcus Eriksson <krummas@gmail.com>
*
* 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 "rabbitmq_log.h"
#include <drizzled/message/transaction.pb.h>
#include <google/protobuf/io/coded_stream.h>
#include <stdio.h>
#include <drizzled/module/registry.h>
#include <drizzled/plugin.h>
#include <stdint.h>
#include "rabbitmq_handler.h"
#include <boost/program_options.hpp>
#include <drizzled/module/option_map.h>
namespace po= boost::program_options;
using namespace std;
using namespace drizzled;
using namespace google;
namespace drizzle_plugin
{
/**
* rabbitmq port
*/
static port_constraint sysvar_rabbitmq_port;
RabbitMQLog::RabbitMQLog(const string &name,
RabbitMQHandler* mqHandler) :
plugin::TransactionApplier(name),
_rabbitMQHandler(mqHandler)
{ }
RabbitMQLog::~RabbitMQLog()
{
_rabbitMQHandler->disconnect();
delete _rabbitMQHandler;
}
plugin::ReplicationReturnCode
RabbitMQLog::apply(Session &, const message::Transaction &to_apply)
{
size_t message_byte_length= to_apply.ByteSize();
uint8_t* buffer= new uint8_t[message_byte_length];
if(buffer == NULL)
{
errmsg_printf(error::ERROR, _("Failed to allocate enough memory to transaction message\n"));
deactivate();
return plugin::UNKNOWN_ERROR;
}
to_apply.SerializeWithCachedSizesToArray(buffer);
short tries = 3;
bool sent = false;
while (!sent && tries > 0) {
tries--;
try
{
_rabbitMQHandler->publish(buffer, int(message_byte_length));
sent = true;
}
catch(exception& e)
{
errmsg_printf(error::ERROR, _(e.what()));
try {
_rabbitMQHandler->reconnect();
} catch(exception &e) {
errmsg_printf(error::ERROR, _("Could not reconnect, trying again.. - waiting 10 seconds for server to come back"));
sleep(10);
} //
}
}
delete[] buffer;
if(sent) return plugin::SUCCESS;
errmsg_printf(error::ERROR, _("RabbitMQ server has disappeared, failing transaction."));
deactivate();
return plugin::UNKNOWN_ERROR;
}
static RabbitMQLog *rabbitmqLogger; ///< the actual plugin
static RabbitMQHandler* rabbitmqHandler; ///< the rabbitmq handler
/**
* Initialize the rabbitmq logger - instanciates the dependencies (the handler)
* and creates the log handler with the dependency - makes it easier to swap out
* handler implementation
*/
static int init(drizzled::module::Context &context)
{
const module::option_map &vm= context.getOptions();
try
{
rabbitmqHandler= new RabbitMQHandler(vm["host"].as<string>(),
sysvar_rabbitmq_port,
vm["username"].as<string>(),
vm["password"].as<string>(),
vm["virtualhost"].as<string>(),
vm["exchange"].as<string>(),
vm["routingkey"].as<string>());
}
catch (exception& e)
{
errmsg_printf(error::ERROR, _("Failed to allocate the RabbitMQHandler. Got error: %s\n"),
e.what());
return 1;
}
try
{
rabbitmqLogger= new RabbitMQLog("rabbit_log_applier",
rabbitmqHandler);
}
catch (exception& e)
{
errmsg_printf(error::ERROR, _("Failed to allocate the RabbitMQLog instance. Got error: %s\n"),
e.what());
return 1;
}
context.add(rabbitmqLogger);
ReplicationServices::attachApplier(rabbitmqLogger, vm["use-replicator"].as<string>());
context.registerVariable(new sys_var_const_string_val("host", vm["host"].as<string>()));
context.registerVariable(new sys_var_constrained_value_readonly<in_port_t>("port", sysvar_rabbitmq_port));
context.registerVariable(new sys_var_const_string_val("username", vm["username"].as<string>()));
context.registerVariable(new sys_var_const_string_val("password", vm["password"].as<string>()));
context.registerVariable(new sys_var_const_string_val("virtualhost", vm["virtualhost"].as<string>()));
context.registerVariable(new sys_var_const_string_val("exchange", vm["exchange"].as<string>()));
context.registerVariable(new sys_var_const_string_val("routingkey", vm["routingkey"].as<string>()));
return 0;
}
static void init_options(drizzled::module::option_context &context)
{
context("host",
po::value<string>()->default_value("localhost"),
_("Host name to connect to"));
context("port",
po::value<port_constraint>(&sysvar_rabbitmq_port)->default_value(5672),
_("Port to connect to"));
context("virtualhost",
po::value<string>()->default_value("/"),
_("RabbitMQ virtualhost"));
context("username",
po::value<string>()->default_value("guest"),
_("RabbitMQ username"));
context("password",
po::value<string>()->default_value("guest"),
_("RabbitMQ password"));
context("use-replicator",
po::value<string>()->default_value("default_replicator"),
_("Name of the replicator plugin to use (default='default_replicator')"));
context("exchange",
po::value<string>()->default_value("ReplicationExchange"),
_("Name of RabbitMQ exchange to publish to"));
context("routingkey",
po::value<string>()->default_value("ReplicationRoutingKey"),
_("Name of RabbitMQ routing key to use"));
}
} /* namespace drizzle_plugin */
DRIZZLE_PLUGIN(drizzle_plugin::init, NULL, drizzle_plugin::init_options);
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