# mt-aws-glacier - Amazon Glacier sync client
# Copyright (C) 2012-2013 Victor Efimov
# http://mt-aws.com (also http://vs-dev.com) vs@vs-dev.com
# License: GPLv3
#
# This file is part of "mt-aws-glacier"
#
# mt-aws-glacier 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 3 of the License, or
# (at your option) any later version.
#
# mt-aws-glacier 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, see <http://www.gnu.org/licenses/>.
package App::MtAws::ParentWorker;
use lib 'lib';
use strict;
use warnings;
use utf8;
use App::MtAws::LineProtocol;
use Carp;
use POSIX;
use App::MtAws::Utils;
use bytes;
no bytes;
sub new
{
my ($class, %args) = @_;
my $self = \%args;
$self->{children}||die;
$self->{disp_select}||die;
$self->{options}||die;
@{$self->{freeworkers}} = keys %{$self->{children}};
bless $self, $class;
return $self;
}
sub process_task
{
my ($self, $ft, $journal) = @_;
my $task_list = {};
while (1) {
if ( @{$self->{freeworkers}} ) {
my ($result, $task) = $ft->get_task();
if ($result eq 'wait') {
if (scalar keys %{$self->{children}} == scalar @{$self->{freeworkers}}) {
die;
}
my ($r, $att) = $self->wait_worker($task_list, $ft, $journal);
return ($r, $att) if $r;
} elsif ($result eq 'ok') {
my $worker_pid = shift @{$self->{freeworkers}};
my $worker = $self->{children}->{$worker_pid};
$task_list->{$task->{id}} = $task;
send_data($worker->{tochild}, $task->{action}, $task->{id}, $task->{data}, $task->{attachment}) or
$self->comm_error;
} elsif ($result eq 'done') {
return (1, undef);
} else {
die;
}
} else {
my ($r, $att) = $self->wait_worker($task_list, $ft, $journal);
return ($r, $att) if $r;
}
}
}
sub wait_worker
{
my ($self, $task_list, $ft, $journal) = @_;
my @ready;
do { @ready = $self->{disp_select}->can_read(); } until @ready || $! != EINTR;
for my $fh (@ready) {
my ($pid, undef, $taskid, $data, $resultattachmentref) = get_data($fh);
$pid or $self->comm_error;
push @{$self->{freeworkers}}, $pid;
die unless my $task = $task_list->{$taskid};
$task->{result} = $data;
$task->{attachmentref} = $resultattachmentref;
print "PID $pid $task->{result}->{console_out}\n";
if ($task->{result}->{journal_entry}) {
confess unless defined $journal;
$journal->add_entry($task->{result}->{journal_entry});
}
delete $task_list->{$taskid};
my ($result) = $ft->finish_task($task);
if ($result eq 'done') {
return ($task->{result}, $task->{attachmentref});
}
}
return 0;
}
sub comm_error
{
my ($self) = @_;
sleep 1; # let's wait for SIGCHLD in order to have same error message in same cases
kill (POSIX::SIGUSR2, keys %{$self->{children}});
print STDERR "EXIT eof/error when communicate with child process\n";
exit(1);
}
1;