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=head1 NAME |
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AnyEvent::MP::Node - represent a node |
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|
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=head1 SYNOPSIS |
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|
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use AnyEvent::MP::Node; |
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|
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=head1 DESCRIPTION |
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|
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This is an internal utility module, horrible to look at, so don't. |
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=cut |
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|
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package AnyEvent::MP::Node; |
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|
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use common::sense; |
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use AE (); |
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use AnyEvent::Util (); |
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use AnyEvent::Socket (); |
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|
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use AnyEvent::MP::Transport (); |
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|
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sub new { |
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my ($self, $id) = @_; |
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|
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$self = bless { id => $id }, $self; |
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|
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$self->init; |
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$self->transport_reset; |
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|
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$self |
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} |
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|
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sub init { |
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# |
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} |
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|
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sub send { |
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&{ shift->{send} } |
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} |
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|
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# nodes reachable via the network |
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package AnyEvent::MP::Node::External; |
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|
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use base "AnyEvent::MP::Node"; |
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|
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# called at init time, mostly sets {send} |
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sub transport_reset { |
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my ($self) = @_; |
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|
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delete $self->{transport}; |
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|
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Scalar::Util::weaken $self; |
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|
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$self->{send} = sub { |
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push @{$self->{queue}}, shift; |
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$self->connect; |
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}; |
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} |
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|
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# called each time we fail to establish a connection, |
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# or the existing connection failed |
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sub transport_error { |
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my ($self, @reason) = @_; |
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|
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my $no_transport = !$self->{transport}; |
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|
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delete $self->{connect_w}; |
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delete $self->{connect_to}; |
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|
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delete $self->{queue}; |
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$self->transport_reset; |
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|
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if (my $mon = delete $self->{lmon}) { |
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$_->(@reason) for map @$_, values %$mon; |
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} |
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|
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AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason) |
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unless $no_transport; |
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|
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# if we are here and are idle, we nuke ourselves |
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delete $AnyEvent::MP::Kernel::NODE{$self->{id}} |
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unless $self->{transport} || $self->{connect_to}; |
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} |
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|
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# called after handshake was successful |
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sub transport_connect { |
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my ($self, $transport) = @_; |
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|
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delete $self->{trial}; |
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|
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$self->transport_error (transport_error => "switched connections") |
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if $self->{transport}; |
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|
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delete $self->{connect_w}; |
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delete $self->{connect_to}; |
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|
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$self->{transport} = $transport; |
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my $transport_send = $transport->can ("send"); |
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|
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$self->{send} = sub { |
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$transport_send->($transport, $_[0]); |
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}; |
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AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1); |
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|
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$transport->send ($_) |
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for @{ delete $self->{queue} || [] }; |
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} |
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sub connect { |
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my ($self, @addresses) = @_; |
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return if $self->{transport}; |
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|
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Scalar::Util::weaken $self; |
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|
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$self->{connect_to} ||= AE::timer |
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$AnyEvent::MP::Config::CFG{monitor_timeout} || $AnyEvent::MP::Kernel::MONITOR_TIMEOUT, |
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0, |
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sub { |
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$self->transport_error (transport_error => $self->{id}, "unable to connect"); |
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}; |
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return unless @addresses; |
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$AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]"); |
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|
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unless ($self->{connect_w}) { |
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my @endpoints; |
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|
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$self->{connect_w} = AE::timer |
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rand, |
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$AnyEvent::MP::Config::CFG{connect_interval} || $AnyEvent::MP::Kernel::CONNECT_INTERVAL, |
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sub { |
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@endpoints = @addresses |
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unless @endpoints; |
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|
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my $endpoint = shift @endpoints; |
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|
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$AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint"); |
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|
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$self->{trial}{$endpoint} ||= do { |
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my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint |
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or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference."); |
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|
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AnyEvent::MP::Transport::mp_connect |
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$host, $port, |
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sub { delete $self->{trial}{$endpoint} }, |
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}; |
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} |
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; |
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} |
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} |
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|
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sub kill { |
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my ($self, $port, @reason) = @_; |
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|
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$self->send (["", kil => $port, @reason]); |
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} |
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sub monitor { |
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my ($self, $portid, $cb) = @_; |
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my $list = $self->{lmon}{$portid} ||= []; |
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$self->send (["", mon1 => $portid]) |
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unless @$list || !length $portid; |
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push @$list, $cb; |
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} |
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|
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sub unmonitor { |
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my ($self, $portid, $cb) = @_; |
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|
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my $list = $self->{lmon}{$portid} |
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or return; |
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|
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@$list = grep $_ != $cb, @$list; |
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|
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unless (@$list) { |
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$self->send (["", mon0 => $portid]); |
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delete $self->{monitor}{$portid}; |
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} |
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} |
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|
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# used for direct slave connections as well |
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package AnyEvent::MP::Node::Direct; |
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|
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use base "AnyEvent::MP::Node::External"; |
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package AnyEvent::MP::Node::Self; |
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|
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use base "AnyEvent::MP::Node"; |
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sub connect { |
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# we are trivially connected |
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} |
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|
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sub transport_reset { |
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my ($self) = @_; |
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|
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Scalar::Util::weaken $self; |
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|
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$self->{send} = sub { |
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local $AnyEvent::MP::Kernel::SRCNODE = $self; |
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AnyEvent::MP::Kernel::_inject (@{ $_[0] }); |
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}; |
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} |
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sub transport_connect { |
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my ($self, $tp) = @_; |
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$AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})"); |
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} |
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sub kill { |
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my ($self, $port, @reason) = @_; |
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delete $AnyEvent::MP::Kernel::PORT{$port}; |
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delete $AnyEvent::MP::Kernel::PORT_DATA{$port}; |
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my $mon = delete $AnyEvent::MP::Kernel::LMON{$port} |
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or !@reason |
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or $AnyEvent::MP::Kernel::WARN->(2, "unmonitored local port $port died with reason: @reason"); |
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|
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$_->(@reason) for values %$mon; |
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} |
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sub monitor { |
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my ($self, $portid, $cb) = @_; |
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return $cb->(no_such_port => "cannot monitor nonexistent port") |
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unless exists $AnyEvent::MP::Kernel::PORT{$portid}; |
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$AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb; |
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} |
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sub unmonitor { |
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my ($self, $portid, $cb) = @_; |
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delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0}; |
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} |
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=head1 SEE ALSO |
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|
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L<AnyEvent::MP>. |
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=head1 AUTHOR |
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|
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Marc Lehmann <schmorp@schmorp.de> |
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http://home.schmorp.de/ |
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=cut |
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1 |
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