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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
package MHA::BinlogPosFinderXid;
use strict;
use warnings FATAL => 'all';
use Carp qw(croak);
use MHA::NodeConst;
use MHA::NodeUtil;
use MHA::BinlogHeaderParser;
use MHA::BinlogManager;
use base 'MHA::BinlogPosFinder';
sub get_starting_master_pos($$) {
my $self = shift;
my $parser = shift;
return $parser->get_starting_mlp_xid();
}
sub find_starting_relay_pos($$) {
my $self = shift;
my $relay_file = shift;
my $last_absolute_mpos = 0;
my $prev_mpos = 0;
my $in_relative = 0;
my $real_mpos = 0;
my %status = ();
my $start_rlp;
my $start_rlf;
my $found;
my $parser;
my ( $relay_prefix, $start_relay_num ) =
MHA::BinlogManager::get_head_and_number($relay_file);
my $relay_dir = $self->{relay_dir};
print
"Finding target relay pos by using Xid, not end_log_pos. This is because master's version is 5.0.45 or lower, or master's version is unknown. It is recommended upgrading MySQL 5.0.latest, 5.1 or later.\n";
for ( my $i = $start_relay_num ; ; $i++ ) {
my $from_file = $relay_prefix . "." . sprintf( "%06d", ($i) );
last if ( !-f "$relay_dir/$from_file" );
$parser = new MHA::BinlogHeaderParser(
dir => $relay_dir,
file => $from_file,
self_server_id => $self->{server_id},
target_rmlp => $self->{target_rmlp},
debug => $self->{debug},
);
$parser->open_binlog();
(
$found, $start_rlp, $last_absolute_mpos, $prev_mpos, $in_relative,
$real_mpos
)
= $parser->find_target_relay_pos_xid( $last_absolute_mpos, $prev_mpos,
$in_relative, $real_mpos );
$parser->close_binlog();
if ($found) {
$start_rlf = $from_file;
last;
}
}
if ($found) {
$status{status} = 0;
$status{start_rlf} = $start_rlf;
$status{start_rlp} = $start_rlp;
if ( $start_rlp == $parser->{binlog_size} ) {
if ( $start_rlf eq $self->{end_log} ) {
$status{status} = $MHA::NodeConst::Target_Has_Received_All_Relay_Logs;
}
else {
$status{start_rlf} = MHA::BinlogManager::get_post_file($start_rlf);
$status{start_rlp} = 4;
}
}
return %status;
}
else {
print "Target pos NOT found!\n";
$status{status} = $MHA::NodeConst::Relay_Pos_Not_Found;
return %status;
}
}
1;
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