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package AnyEvent::RabbitMQ::Fork::Worker; |
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$AnyEvent::RabbitMQ::Fork::Worker::VERSION = '0.5'; |
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=head1 NAME |
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AnyEvent::RabbitMQ::Fork::Worker - Fork side magic |
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=head1 DESCRIPTION |
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No user serviceable parts inside. Venture at your own risk. |
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=cut |
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954
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use Moo; |
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use Types::Standard qw(InstanceOf Bool); |
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1100
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use Guard; |
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use Scalar::Util qw(weaken blessed); |
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use namespace::clean; |
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use AnyEvent::RabbitMQ 1.18; |
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has verbose => (is => 'rw', isa => Bool, default => 0); |
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has connection => ( |
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is => 'lazy', |
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isa => InstanceOf['AnyEvent::RabbitMQ'], |
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clearer => 1, |
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handles => ['channels'], |
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); |
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sub _build_connection { |
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my $self = shift; |
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my $conn = AnyEvent::RabbitMQ->new(verbose => $self->verbose); |
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_cb_hooks($conn); |
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return $conn; |
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} |
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### RPC Interface ### |
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my $instance; |
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sub init { |
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my $class = shift; |
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$instance = $class->new(@_); |
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return; |
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} |
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sub run { |
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my ($done, $method, $ch_id, @args, %args) = @_; |
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weaken(my $self = $instance); |
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unless (@args % 2) { |
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%args = @args; |
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@args = (); |
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foreach my $event (grep { /^on_/ } keys %args) { |
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# callback signature provided by parent process |
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my $sig = delete $args{$event}; |
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# our callback to be used by AE::RMQ |
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$args{$event} = $self->_generate_callback($method, $event, $sig); |
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} |
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} |
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if (defined $ch_id and my $ch = $self->channels->{ $ch_id }) { |
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$ch->$method(@args ? @args : %args); |
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$done->(); |
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} elsif (defined $ch_id and $ch_id == 0) { |
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if ($method eq 'DEMOLISH') { |
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$self->clear_connection; |
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} else { |
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$self->connection->$method(@args ? @args : %args); |
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} |
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$done->(); |
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} else { |
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$ch_id ||= ''; |
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$done->("Unknown channel: '$ch_id'"); |
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} |
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return; |
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} |
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my %cb_hooks = ( |
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channel => { |
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_state => 'is_open', |
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_is_active => 'is_active', |
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_is_confirm => 'is_confirm', |
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}, |
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connection => { |
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_state => 'is_open', |
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_login_user => 'login_user', |
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_server_properties => 'server_properties', |
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} |
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); |
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sub _cb_hooks { |
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weaken(my $obj = shift); |
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my ($type, $hooks) |
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= $obj->isa('AnyEvent::RabbitMQ') |
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? ('connection', $cb_hooks{connection}) |
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: ($obj->id, $cb_hooks{channel}); |
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foreach my $prop (keys %$hooks) { |
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my $method = $hooks->{$prop}; |
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## no critic (Miscellanea::ProhibitTies) |
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tie $obj->{$prop}, 'AnyEvent::RabbitMQ::Fork::Worker::TieScalar', |
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$obj->{$prop}, sub { |
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AnyEvent::Fork::RPC::event( |
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i => { $type => { $method => $obj->$method } }); |
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}; |
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} |
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return; |
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} |
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sub _generate_callback { |
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my ($self, $method, $event, $sig) = @_; |
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my $should_clear_connection = ( |
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$sig->[-1] eq 'AnyEvent::RabbitMQ' and ($method eq 'close' |
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or ($method eq 'connect' and $event eq 'on_close')) |
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) ? 1 : 0; |
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my $guard = guard { |
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# inform parent process that this callback is no longer needed |
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AnyEvent::Fork::RPC::event(cbd => @$sig); |
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}; |
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# our callback to be used by AE::RMQ |
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weaken(my $wself = $self); |
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return sub { |
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$guard if 0; # keepalive |
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$wself->clear_connection if $should_clear_connection; |
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if ((my $isa = blessed $_[0] || q{}) =~ /^AnyEvent::RabbitMQ/) { |
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# we put our sentry value in place later |
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my $obj = shift; |
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if ($method eq 'open_channel' and $event eq 'on_success') { |
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my $id = $obj->id; |
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$obj->{"_$wself\_guard"} ||= guard { |
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# channel was GC'd by AE::RMQ |
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AnyEvent::Fork::RPC::event(chd => $id); |
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}; |
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# needs to be done after parent registers channel |
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AE::postpone { _cb_hooks($obj) }; |
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} |
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if ($isa eq 'AnyEvent::RabbitMQ') { |
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# replace with our own handling |
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$obj->{_handle} |
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->on_drain(sub { AnyEvent::Fork::RPC::event('cdw') }); |
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} |
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# this is our signal back to the parent as to what kind of object |
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# it was |
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unshift @_, |
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\[$isa, ($isa eq 'AnyEvent::RabbitMQ::Channel' ? $obj->id : ())]; |
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} |
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168
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# these values don't pass muster with Storable |
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delete local @{ $_[0] }{ 'fh', 'on_error', 'on_drain' } |
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if $method eq 'connect' |
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and $event = 'on_failure' |
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and blessed $_[0]; |
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# tell the parent to run the users callback known by $sig |
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AnyEvent::Fork::RPC::event(cb => $sig, @_); |
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}; |
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} |
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179
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=head1 AUTHOR |
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181
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William Cox |
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183
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=head1 COPYRIGHT |
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185
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Copyright (c) 2014, the above named author(s). |
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187
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=head1 LICENSE |
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189
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This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. |
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191
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=cut |
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193
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package # hide from PAUSE |
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AnyEvent::RabbitMQ::Fork::Worker::TieScalar; |
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196
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use strict; |
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use warnings; |
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199
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sub TIESCALAR { $_[2]->(); return bless [$_[1], $_[2]] => $_[0] } |
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sub FETCH { return $_[0][0] } |
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sub STORE { $_[0][1]->(); return $_[0][0] = $_[1] } |
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sub DESTROY { return @{ $_[0] } = () } |
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204
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1; |