# mt-aws-glacier - Amazon Glacier sync client
# Copyright (C) 2012-2014 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::QueueJob::Iterator;
our $VERSION = '1.115';
use strict;
use warnings;
use Carp;
use App::MtAws::QueueJobResult;
use base 'App::MtAws::QueueJob';
sub init
{
my ($self) = @_;
$self->{iterator}||confess "iterator required";
$self->{maxcnt} ||= 30;
$self->{jobs} = {};
$self->{job_autoincrement} = 0;
$self->enter('itt_only');
}
sub get_next_itt
{
my ($self) = @_;
my $next_job = $self->{iterator}->();
if ($next_job) {
my $i = ++$self->{job_autoincrement};
$self->{jobs}{$i} = $next_job;
}
$next_job;
}
sub find_next_job
{
my ($self) = @_;
my $maxcnt = $self->{maxcnt};
for my $job_id (keys %{$self->{jobs}}) { # Random order of jobs
my $job = $self->{jobs}{$job_id};
my $res = $job->next();
# uncoverable branch false count:3
if ($res->{code} eq JOB_WAIT) {
return JOB_WAIT unless --$maxcnt;
} elsif ($res->{code} eq JOB_DONE) {
delete $self->{jobs}{$job_id};
return JOB_RETRY;
} elsif ($res->{code} eq JOB_OK) {
return task($res->{task}, sub {
$res->{task}{cb_task_proxy}->(@_);
return;
});
} else {
# uncoverable statement
confess;
}
}
return;
}
# there are no pending jobs, only iterator available
sub on_itt_only
{
my ($self) = @_;
if ($self->get_next_itt) {
return state 'itt_and_jobs'; # immediatelly switch to other state
} else {
return JOB_DONE;
}
}
# both jobs and iterator available
sub on_itt_and_jobs
{
my ($self) = @_;
if (my @r = $self->find_next_job) { # try to process one pending job
return @r;
} elsif ($self->get_next_itt) {
return JOB_RETRY # otherwise, get new job from iteartor and retry
} else {
return state 'jobs_only' # no jobs in iterator? - switch to jobs_only
}
}
sub on_jobs_only
{
my ($self) = @_;
if (my @r = $self->find_next_job) {
return @r; # can be 'wait' here
} else {
return keys %{$self->{jobs}} ? JOB_WAIT : state "done";
}
}
1;