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package presque::worker;
use Moose;
our $VERSION = '0.01';
use AnyEvent;
use AnyEvent::HTTP;
use Carp;
use JSON;
use Try::Tiny;
has base_uri => ( is => 'ro', isa => 'Str', required => 1 );
has queue => ( is => 'ro', isa => 'Str', required => 1 );
has interval => ( is => 'ro', isa => 'Int', lazy => 1, default => 5 );
sub BUILD {
my ( $self, $args ) = @_;
my ( $get, $timer );
my $uri = $self->base_uri;
my $queue = $self->queue;
my $queue_uri = $uri . '/q/' . $queue;
if ( !$self->meta->find_method_by_name('work') ) {
Carp::confess "method work is missing";
}
$get = sub {
http_get $queue_uri, sub {
my ( $body, $hdr ) = @_;
return if ( !$body || $hdr->{Status} != 200 );
my $content = JSON::decode_json($body);
try {
$self->work($content);
}
catch {
$self->fail($content, $_) if $self->meta->find_method_by_name('fail');
};
$timer = AnyEvent->timer( after => $self->interval, cb => $get );
};
};
$get->();
return $self;
}
1;
__END__
=head1 NAME
presque::worker - a presque worker
=head1 SYNOPSIS
package myworker;
use Moose;
extends 'presque::worker';
sub work {
my ($self, $job) = @_;
...
}
sub fail {
my ($self, $job, $error) = @_;
...
}
=head1 DESCRIPTION
presque::worker - Worker for the C<presque> message queue system
=head1 METHODS
=head2 work ($job_description)
Worker must implement the B<work> method. The only argument of this method is a hashref
containing the job.
=head2 fail ($job_description, $error_reason)
Worker may implement the B<fail> method. This method have two arguments: the job description
and the reason of the failure.
=head1 AUTHOR
franck cuny E<lt>franck@lumberjaph.netE<gt>
=head1 SEE ALSO
=head1 LICENSE
Copyright 2010 by Linkfluence
L<http://linkfluence.net>
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=cut
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