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|
package AnyEvent::Gearman::Worker::Connection;
use Any::Moose;
use Scalar::Util 'weaken';
require bytes;
use AnyEvent::Gearman::Constants;
use AnyEvent::Gearman::Job;
extends 'AnyEvent::Gearman::Connection';
has grabbing => (
is => 'rw',
isa => 'Bool',
default => 0,
);
no Any::Moose;
sub request {
my ($self, $type, $args) = @_;
$args ||= '';
$self->add_on_ready(
sub {
$self->handler->push_write(
"\0REQ" . pack('NN', $type, bytes::length($args)) . $args
);
},
sub {
warn sprintf 'Failed to send request to "%s": %s', $self->hostspec, $!;
},
);
weaken $self;
}
sub register_function {
my ($self, $func_name) = @_;
my $prefix = $self->context->prefix;
$func_name = "$prefix\t$func_name" if $prefix;
$self->can_do($func_name);
$self->grab_job unless $self->grabbing;
}
sub unregister_function {
my ($self, $func_name) = @_;
my $prefix = $self->context->prefix;
$func_name = "$prefix\t$func_name" if $prefix;
$self->cant_do($func_name);
}
sub can_do {
my ($self, $func_name) = @_;
$self->request(CAN_DO, $func_name);
}
sub cant_do {
my ($self, $func_name) = @_;
$self->request(CANT_DO, $func_name);
}
sub grab_job {
my $self = shift;
$self->grabbing(1);
$self->request(GRAB_JOB);
}
sub pre_sleep {
my $self = shift;
$self->request(PRE_SLEEP);
}
sub process_packet_6 { # NOOP
my ($self, $len) = @_;
$self->grab_job;
}
sub process_packet_10 { # NO_JOB
my ($self, $len) = @_;
$self->grabbing(0);
$self->pre_sleep;
}
sub process_packet_11 { # JOB_ASSIGN
my ($self, $len) = @_;
my $handle = $self->handler;
$self->grabbing(0);
$handle->unshift_read( line => "\0", sub {
my $job_handle = $_[1];
$len -= bytes::length($job_handle) + 1;
$_[0]->unshift_read( line => "\0", sub {
my $function = $_[1];
$len -= bytes::length($function) + 1;
$_[0]->unshift_read( chunk => $len, sub {
my $workload = $_[1];
my $job = AnyEvent::Gearman::Job->new(
$function => $workload,
on_complete => sub {
my ($job, $result) = @_;
$self->request(WORK_COMPLETE, "$job_handle\0$result");
$self->grab_job();
},
on_data => sub {
my ($job, $data) = @_;
$self->request(WORK_DATA, "$job_handle\0$data");
},
on_fail => sub {
my ($job) = @_;
$self->request(WORK_FAIL, $job_handle);
$self->grab_job();
},
on_status => sub {
my ($job, $numerator, $denominator) = @_;
$self->request(
WORK_STATUS, "$job_handle\0$numerator\0$denominator"
);
},
on_warning => sub {
my ($job, $warning) = @_;
$self->request(WORK_WARNING, "$job_handle\0$warning");
},
);
$self->work( $job );
});
});
});
weaken $self;
}
sub work {
my ($self, $job) = @_;
my $cb = $self->context->functions->{ $job->function } or return;
$cb->($job);
}
__PACKAGE__->meta->make_immutable;
__END__
=head1 NAME
AnyEvent::Gearman::Worker::Connection - connection class for worker
=head1 METHODS
=head2 request
=head2 register_function
=head2 unregister_function
=head2 can_do
=head2 cant_do
=head2 grab_job
=head2 pre_sleep
=head2 work
=head1 AUTHOR
Daisuke Murase <typester@cpan.org>
Pedro Melo <melo@cpan.org>
=head1 COPYRIGHT AND LICENSE
Copyright (c) 2009 by KAYAC Inc.
This program is free software; you can redistribute
it and/or modify it under the same terms as Perl itself.
The full text of the license can be found in the
LICENSE file included with this module.
=cut
|
