AnyEvent-MP/MP/Node.pm

=head1 NAME

AnyEvent::MP::Node - a single processing node (CPU/process...)

=head1 SYNOPSIS

   use AnyEvent::MP::Node;

=head1 DESCRIPTION

=cut

package AnyEvent::MP::Node;

use common::sense;

use AE ();
use AnyEvent::Util ();
use AnyEvent::Socket ();

use AnyEvent::MP::Transport ();

sub new {
   my ($class, $noderef) = @_;

   bless { noderef => $noderef }, $class
}

package AnyEvent::MP::Node::Direct;

use base "AnyEvent::MP::Node";

sub send {
   my ($self, $msg) = @_;

   if ($self->{transport}) {
      $self->{transport}->send ($msg);
   } elsif ($self->{queue}) {
      push @{ $self->{queue} }, $msg;
   } else {
      $self->{queue} = [$msg];
      $self->connect;
   }
}

sub kill {
   my ($self, $port, @reason) = @_;

   $self->send (["", kil => $port, @reason]);
}

sub monitor {
   my ($self, $portid, $cb) = @_;

   my $list = $self->{lmon}{$portid} ||= [];

   $self->send (["", mon1 => $portid])
      unless @$list;

   push @$list, $cb;
}

sub unmonitor {
   my ($self, $portid, $cb) = @_;

   my $list = $self->{lmon}{$portid}
      or return;

   @$list = grep $_ != $cb, @$list;

   unless (@$list) {
      $self->send (["", mon0 => $portid]);
      delete $self->{monitor}{$portid};
   }
}

sub set_transport {
   my ($self, $transport) = @_;

   $self->clr_transport
      if $self->{transport};

   delete $self->{trial};
   delete $self->{retry};
   delete $self->{next_connect};

   $self->{transport} = $transport;

   $transport->send ($_)
      for @{ delete $self->{queue} || [] };
}

sub fail {
   my ($self, @reason) = @_;

   delete $self->{queue};

   if (my $mon = delete $self->{lmon}) {
      $_->(@reason) for map @$_, values %$mon;
   }
}

sub clr_transport {
   my ($self, @reason) = @_;

   delete $self->{transport};
   $self->connect;
}

sub connect {
   my ($self) = @_;

   Scalar::Util::weaken $self;

   $self->{retry} ||= [split /,/, $self->{noderef}];

   my $endpoint = shift @{ $self->{retry} };

   if (defined $endpoint) {
      $self->{trial}{$endpoint} ||= do {
         my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
            or return $AnyEvent::MP::Base::WARN->("$self->{noderef}: not a resolved node reference.");

         my ($w, $g);

         $w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub {
            delete $self->{trial}{$endpoint};
         };
         $g = AnyEvent::MP::Transport::mp_connect
            $host, $port,
            sub {
               delete $self->{trial}{$endpoint}
                  unless @_;
               $g = shift;
            };
         ;

         [$w, \$g]
      };
   } else {
      $self->fail (transport_error => $self->{noderef}, "unable to connect");
   }

   $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
      delete $self->{retry};
      $self->connect;
   };
}

package AnyEvent::MP::Node::Slave;

use base "AnyEvent::MP::Node::Direct";

sub connect {
   my ($self) = @_;

   $self->fail (transport_error => $self->{noderef}, "unable to connect to slave node");
}

package AnyEvent::MP::Node::Self;

use base "AnyEvent::MP::Node";

sub set_transport {
   Carp::confess "FATAL error, set_transport was called on local node";
}

sub send {
   local $AnyEvent::MP::Base::SRCNODE = $_[0];
   AnyEvent::MP::Base::_inject (@{ $_[1] });
}

sub kill {
   my ($self, $port, @reason) = @_;

   delete $AnyEvent::MP::Base::PORT{$port};
   delete $AnyEvent::MP::Base::PORT_DATA{$port};

   my $mon = delete $AnyEvent::MP::Base::LMON{$port}
      or !@reason
      or $AnyEvent::MP::Base::WARN->("unmonitored local port $port died with reason: @reason");

   $_->(@reason) for values %$mon;
}

sub monitor {
   my ($self, $portid, $cb) = @_;

   return $cb->(no_such_port => "cannot monitor nonexistent port")
      unless exists $AnyEvent::MP::Base::PORT{$portid};

   $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb;
}

sub unmonitor {
   my ($self, $portid, $cb) = @_;

   delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0};
}

=head1 SEE ALSO

L<AnyEvent::MP>.

=head1 AUTHOR

 Marc Lehmann <schmorp@schmorp.de>
 http://home.schmorp.de/

=cut

1

Revision:	1.17
Committed:	Mon Aug 10 01:37:19 2009 UTC (14 years, 9 months ago) by root
Branch:	MAIN
Changes since 1.16:	+1 -3 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	=head1 NAME
2
3			AnyEvent::MP::Node - a single processing node (CPU/process...)
4
5			=head1 SYNOPSIS
6
7			use AnyEvent::MP::Node;
8
9			=head1 DESCRIPTION
10
11			=cut
12
13			package AnyEvent::MP::Node;
14
15			use common::sense;
16
17			use AE ();
18	root	1.6	use AnyEvent::Util ();
19	root	1.1	use AnyEvent::Socket ();
20
21			use AnyEvent::MP::Transport ();
22
23			sub new {
24			my ($class, $noderef) = @_;
25
26			bless { noderef => $noderef }, $class
27			}
28
29			package AnyEvent::MP::Node::Direct;
30
31			use base "AnyEvent::MP::Node";
32
33			sub send {
34			my ($self, $msg) = @_;
35
36			if ($self->{transport}) {
37			$self->{transport}->send ($msg);
38			} elsif ($self->{queue}) {
39			push @{ $self->{queue} }, $msg;
40			} else {
41			$self->{queue} = [$msg];
42			$self->connect;
43			}
44			}
45
46	root	1.7	sub kill {
47			my ($self, $port, @reason) = @_;
48
49			$self->send (["", kil => $port, @reason]);
50			}
51
52	root	1.6	sub monitor {
53			my ($self, $portid, $cb) = @_;
54
55			my $list = $self->{lmon}{$portid} \|\|= [];
56
57			$self->send (["", mon1 => $portid])
58			unless @$list;
59
60			push @$list, $cb;
61			}
62
63			sub unmonitor {
64			my ($self, $portid, $cb) = @_;
65
66			my $list = $self->{lmon}{$portid}
67			or return;
68
69			@$list = grep $_ != $cb, @$list;
70
71			unless (@$list) {
72			$self->send (["", mon0 => $portid]);
73			delete $self->{monitor}{$portid};
74			}
75			}
76
77	root	1.1	sub set_transport {
78			my ($self, $transport) = @_;
79
80	root	1.6	$self->clr_transport
81			if $self->{transport};
82
83	root	1.8	delete $self->{trial};
84	root	1.16	delete $self->{retry};
85	root	1.8	delete $self->{next_connect};
86
87	root	1.15	$self->{transport} = $transport;
88	root	1.1
89			$transport->send ($_)
90			for @{ delete $self->{queue} \|\| [] };
91			}
92
93	root	1.8	sub fail {
94			my ($self, @reason) = @_;
95
96			delete $self->{queue};
97	root	1.1
98	root	1.8	if (my $mon = delete $self->{lmon}) {
99			$_->(@reason) for map @$_, values %$mon;
100	root	1.6	}
101	root	1.8	}
102
103			sub clr_transport {
104			my ($self, @reason) = @_;
105	root	1.4
106	root	1.8	delete $self->{transport};
107	root	1.4	$self->connect;
108	root	1.1	}
109
110			sub connect {
111			my ($self) = @_;
112
113			Scalar::Util::weaken $self;
114
115	root	1.9	$self->{retry} \|\|= [split /,/, $self->{noderef}];
116	root	1.1
117			my $endpoint = shift @{ $self->{retry} };
118
119			if (defined $endpoint) {
120			$self->{trial}{$endpoint} \|\|= do {
121			my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
122	root	1.9	or return $AnyEvent::MP::Base::WARN->("$self->{noderef}: not a resolved node reference.");
123	root	1.1
124			my ($w, $g);
125
126	root	1.5	$w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub {
127	root	1.1	delete $self->{trial}{$endpoint};
128			};
129			$g = AnyEvent::MP::Transport::mp_connect
130			$host, $port,
131			sub {
132			delete $self->{trial}{$endpoint}
133			unless @_;
134			$g = shift;
135			};
136			;
137
138			[$w, \$g]
139			};
140			} else {
141	root	1.10	$self->fail (transport_error => $self->{noderef}, "unable to connect");
142	root	1.1	}
143
144	root	1.5	$self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
145	root	1.16	delete $self->{retry};
146	root	1.1	$self->connect;
147			};
148			}
149
150	root	1.13	package AnyEvent::MP::Node::Slave;
151
152			use base "AnyEvent::MP::Node::Direct";
153
154			sub connect {
155			my ($self) = @_;
156
157			$self->fail (transport_error => $self->{noderef}, "unable to connect to slave node");
158			}
159
160	root	1.1	package AnyEvent::MP::Node::Self;
161
162			use base "AnyEvent::MP::Node";
163
164			sub set_transport {
165	root	1.12	Carp::confess "FATAL error, set_transport was called on local node";
166	root	1.1	}
167
168			sub send {
169	root	1.6	local $AnyEvent::MP::Base::SRCNODE = $_[0];
170			AnyEvent::MP::Base::_inject (@{ $_[1] });
171			}
172
173	root	1.7	sub kill {
174			my ($self, $port, @reason) = @_;
175
176			delete $AnyEvent::MP::Base::PORT{$port};
177	root	1.8	delete $AnyEvent::MP::Base::PORT_DATA{$port};
178	root	1.7
179			my $mon = delete $AnyEvent::MP::Base::LMON{$port}
180	root	1.8	or !@reason
181			or $AnyEvent::MP::Base::WARN->("unmonitored local port $port died with reason: @reason");
182	root	1.7
183			$_->(@reason) for values %$mon;
184			}
185
186	root	1.6	sub monitor {
187			my ($self, $portid, $cb) = @_;
188
189	root	1.14	return $cb->(no_such_port => "cannot monitor nonexistent port")
190	root	1.6	unless exists $AnyEvent::MP::Base::PORT{$portid};
191
192			$AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb;
193			}
194
195			sub unmonitor {
196			my ($self, $portid, $cb) = @_;
197
198			delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0};
199	root	1.1	}
200
201			=head1 SEE ALSO
202
203	root	1.17	L<AnyEvent::MP>.
204	root	1.1
205			=head1 AUTHOR
206
207			Marc Lehmann <schmorp@schmorp.de>
208			http://home.schmorp.de/
209
210			=cut
211
212			1
213