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#!/usr/bin/env perl

#  Copyright (C) 2011 DeNA Co.,Ltd.
#
#  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 Street, Fifth Floor, Boston, MA  02110-1301  USA

use strict;
use warnings FATAL => 'all';

use Getopt::Long qw(:config pass_through);
use Pod::Usage;
use MHA::MasterMonitor;
use MHA::MasterFailover;
use MHA::MasterRotate;
use MHA::ManagerConst;

my $master_state = "";
my $help;
my $version;

$| = 1;

GetOptions(
  'help'           => \$help,
  'version'        => \$version,
  'master_state=s' => \$master_state
);

my $exit_code = 1;

if ($version) {
  print "masterha_master_switch version $MHA::ManagerConst::VERSION.\n";
  exit 0;
}

if ($help) {
  pod2usage(0);
}

if ( $master_state eq "dead" ) {
  $exit_code = MHA::MasterFailover::main(@ARGV);
}
elsif ( $master_state eq "alive" ) {
  $exit_code = MHA::MasterRotate::main(@ARGV);
}
else {
  pod2usage(1);
}
exit $exit_code;

# ############################################################################
# Documentation
# ############################################################################

=pod

=head1 NAME

masterha_master_switch - Switching MySQL master server to one of other slave servers

=head1 SYNOPSIS

# For master failover

masterha_master_switch --master_state=dead --global_conf=/etc/masterha_default.cnf --conf=/usr/local/masterha/conf/app1.cnf --dead_master_host=host1 

# For online master switch

masterha_master_switch --master_state=alive --global_conf=/etc/masterha_default.cnf --conf=/usr/local/masterha/conf/app1.cnf

See online reference (http://code.google.com/p/mysql-master-ha/wiki/masterha_master_switch) for details.

=head1 DESCRIPTION

See online reference (http://code.google.com/p/mysql-master-ha/wiki/masterha_master_switch) for details.