~drizzle-trunk/drizzle/development

/* - 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_schema.h>

#include <drizzled/execute.h>

#include <drizzled/sql/result_set.h>

#include <string>

#include <vector>

#include <boost/lexical_cast.hpp>

using namespace std;

using namespace drizzled;

using namespace boost;

namespace slave

{

bool ReplicationSchema::create()

{

  vector<string> sql;

  sql.push_back("COMMIT");

  sql.push_back("CREATE SCHEMA IF NOT EXISTS `sys_replication` REPLICATE=FALSE");

  if (not executeSQL(sql))

    return false;

  /*

   * Create our IO thread state information table if we need to.

   */

  sql.clear();

  sql.push_back("COMMIT");

  sql.push_back("CREATE TABLE IF NOT EXISTS `sys_replication`.`io_state` ("

                " `status` VARCHAR(20) NOT NULL,"

                " `error_msg` VARCHAR(250))"

                " COMMENT = 'VERSION 1.0'");

  if (not executeSQL(sql))

    return false;

  sql.clear();

  sql.push_back("SELECT COUNT(*) FROM `sys_replication`.`io_state`");

  {

    sql::ResultSet result_set(1);

    Execute execute(*(_session.get()), true);

    execute.run(sql[0], result_set);

    result_set.next();

    string count= result_set.getString(0);

    /* Must always be at least one row in the table */

    if (count == "0")

    {

      sql.clear();

      sql.push_back("INSERT INTO `sys_replication`.`io_state` (`status`)"

                    " VALUES ('STOPPED')");

      if (not executeSQL(sql))

        return false;

    }

  }

  /*

   * Create our applier thread state information table if we need to.

   */

  sql.clear();

  sql.push_back("COMMIT");

  sql.push_back("CREATE TABLE IF NOT EXISTS `sys_replication`.`applier_state`"

                " (`last_applied_commit_id` BIGINT NOT NULL PRIMARY KEY,"

                " `status` VARCHAR(20) NOT NULL,"

                " `error_msg` VARCHAR(250))"

                " COMMENT = 'VERSION 1.0'");

  if (not executeSQL(sql))

    return false;

  sql.clear();

  sql.push_back("SELECT COUNT(*) FROM `sys_replication`.`applier_state`");

  {

    sql::ResultSet result_set(1);

    Execute execute(*(_session.get()), true);

    execute.run(sql[0], result_set);

    result_set.next();

    string count= result_set.getString(0);

    /* Must always be at least one row in the table */

    if (count == "0")

    {

      sql.clear();

      sql.push_back("INSERT INTO `sys_replication`.`applier_state`"

                    " (`last_applied_commit_id`, `status`)"

                    " VALUES (0, 'STOPPED')");

      if (not executeSQL(sql))

        return false;

    }

  }

  /*

   * Create our message queue table if we need to.

   */

  sql.clear();

  sql.push_back("COMMIT");

  sql.push_back("CREATE TABLE IF NOT EXISTS `sys_replication`.`queue`"

                " (`trx_id` BIGINT NOT NULL, `seg_id` INT NOT NULL,"

                " `commit_order` BIGINT, `msg` BLOB,"

                " PRIMARY KEY(`trx_id`, `seg_id`))"

                " COMMENT = 'VERSION 1.0'");

  if (not executeSQL(sql))

    return false;

  return true;

}

bool ReplicationSchema::setInitialMaxCommitId(uint64_t value)

{

  vector<string> sql;

  sql.push_back("UPDATE `sys_replication`.`applier_state`"

                " SET `last_applied_commit_id` = "

                + lexical_cast<string>(value));

  return executeSQL(sql);

}

} /* namespace slave */