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package Padre::Plugin::Swarm::Transport::Local; |
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use strict; |
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use warnings; |
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use Carp 'confess'; |
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use Padre::Logger; |
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use Data::Dumper; |
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use base qw( Object::Event ); |
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use AnyEvent::Handle; |
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use IO::Socket::Multicast; |
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use Padre::Swarm::Message; |
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use JSON; |
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our $VERSION = '0.2'; |
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=pod |
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=head1 NAME |
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Padre::Plugin::Swarm::Transport::Local - Multicast swarm message bus |
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=head1 DESCRIPTION |
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=head1 SYNOPSIS |
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my $t = Padre::Plugin::Swarm::Transport::Local->new(); |
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$t->reg_cb('connect' , sub { printf "Transport %s connected", shift } ); |
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$t->reg_cb('recv', \&incoming_message ); |
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$t->reg_cb('disconnect', sub { warn "Disconnected" } ); |
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$t->enable; |
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=cut |
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sub new { |
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my $class = shift; |
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my $self = $class->SUPER::new(@_); |
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$self->{token} = $$.rand(); |
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return $self; |
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} |
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sub enable { |
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my $self = shift; |
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my $m = IO::Socket::Multicast->new( |
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LocalPort => 12000, |
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ReuseAddr => 1, |
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) or die $!; |
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$m->mcast_add('239.255.255.1'); #should have the interface |
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$m->mcast_loopback( 1 ); |
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$self->{m} = $m; |
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$self->{io} = AnyEvent->io( |
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fh => $m, |
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poll => 'r', |
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cb => sub { |
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$self->event('readable') |
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} |
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); |
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$self->reg_cb( 'readable' , \&readable ); |
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$self->reg_cb('disconnect', \&disconnect ); |
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$self->event('connect',$self->{token} ); |
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return; |
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} |
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sub send { |
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my $self = shift; |
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my $message = shift; |
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if ( threads::shared::is_shared( $message ) ) { |
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TRACE( "SEND A SHARED REFERENCE ?!?!?! - " . Dumper $message ); |
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confess "$message , is a shared value"; |
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} |
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$message->{token} = $self->{token}; |
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my $data = eval { $self->_marshal->encode($message) }; |
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if ($data) { |
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$self->{m}->mcast_send( |
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$data, '239.255.255.1:12000' |
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); |
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} |
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} |
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sub readable { |
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my $self = shift; |
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my $data; |
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unless ( $self->{m} ) { |
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TRACE( 'Multicast handle has gone away!' ); |
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return; |
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} |
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$self->{m}->recv($data,65535); |
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my $message = eval{ $self->_marshal->decode($data) }; |
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if ( $message ) { |
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$self->event('recv', $message); |
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} |
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} |
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99
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100
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sub disconnect { |
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my $self = shift; |
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if ( $self->{io} ) { |
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delete $self->{io}; |
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my $m = delete $self->{m}; |
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$m->mcast_drop('239.255.255.1'); |
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} |
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$self->unreg_me; |
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} |
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110
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sub _marshal { |
111
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JSON->new |
112
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->allow_blessed |
113
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->convert_blessed |
114
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->utf8 |
115
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->filter_json_object(\&synthetic_class ); |
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} |
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118
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119
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sub synthetic_class { |
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my $var = shift ; |
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if ( exists $var->{__origin_class} ) { |
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my $stub = $var->{__origin_class}; |
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my $msg_class = 'Padre::Swarm::Message::' . $stub; |
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my $instance = bless $var , $msg_class; |
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return $instance; |
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} else { |
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return bless $var , 'Padre::Swarm::Message'; |
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} |
129
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}; |
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131
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132
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1; |