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 ();

use base Exporter::;

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>.

=head1 AUTHOR

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

=cut

1

Revision:	1.16
Committed:	Sun Aug 9 16:08:16 2009 UTC (14 years, 9 months ago) by root
Branch:	MAIN
CVS Tags:	rel-0_4
Changes since 1.15:	+2 -3 lines
Log Message:	0.4
#	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			use base Exporter::;
24
25			sub new {
26			my ($class, $noderef) = @_;
27
28			bless { noderef => $noderef }, $class
29			}
30
31			package AnyEvent::MP::Node::Direct;
32
33			use base "AnyEvent::MP::Node";
34
35			sub send {
36			my ($self, $msg) = @_;
37
38			if ($self->{transport}) {
39			$self->{transport}->send ($msg);
40			} elsif ($self->{queue}) {
41			push @{ $self->{queue} }, $msg;
42			} else {
43			$self->{queue} = [$msg];
44			$self->connect;
45			}
46			}
47
48	root	1.7	sub kill {
49			my ($self, $port, @reason) = @_;
50
51			$self->send (["", kil => $port, @reason]);
52			}
53
54	root	1.6	sub monitor {
55			my ($self, $portid, $cb) = @_;
56
57			my $list = $self->{lmon}{$portid} \|\|= [];
58
59			$self->send (["", mon1 => $portid])
60			unless @$list;
61
62			push @$list, $cb;
63			}
64
65			sub unmonitor {
66			my ($self, $portid, $cb) = @_;
67
68			my $list = $self->{lmon}{$portid}
69			or return;
70
71			@$list = grep $_ != $cb, @$list;
72
73			unless (@$list) {
74			$self->send (["", mon0 => $portid]);
75			delete $self->{monitor}{$portid};
76			}
77			}
78
79	root	1.1	sub set_transport {
80			my ($self, $transport) = @_;
81
82	root	1.6	$self->clr_transport
83			if $self->{transport};
84
85	root	1.8	delete $self->{trial};
86	root	1.16	delete $self->{retry};
87	root	1.8	delete $self->{next_connect};
88
89	root	1.15	$self->{transport} = $transport;
90	root	1.1
91			$transport->send ($_)
92			for @{ delete $self->{queue} \|\| [] };
93			}
94
95	root	1.8	sub fail {
96			my ($self, @reason) = @_;
97
98			delete $self->{queue};
99	root	1.1
100	root	1.8	if (my $mon = delete $self->{lmon}) {
101			$_->(@reason) for map @$_, values %$mon;
102	root	1.6	}
103	root	1.8	}
104
105			sub clr_transport {
106			my ($self, @reason) = @_;
107	root	1.4
108	root	1.8	delete $self->{transport};
109	root	1.4	$self->connect;
110	root	1.1	}
111
112			sub connect {
113			my ($self) = @_;
114
115			Scalar::Util::weaken $self;
116
117	root	1.9	$self->{retry} \|\|= [split /,/, $self->{noderef}];
118	root	1.1
119			my $endpoint = shift @{ $self->{retry} };
120
121			if (defined $endpoint) {
122			$self->{trial}{$endpoint} \|\|= do {
123			my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
124	root	1.9	or return $AnyEvent::MP::Base::WARN->("$self->{noderef}: not a resolved node reference.");
125	root	1.1
126			my ($w, $g);
127
128	root	1.5	$w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub {
129	root	1.1	delete $self->{trial}{$endpoint};
130			};
131			$g = AnyEvent::MP::Transport::mp_connect
132			$host, $port,
133			sub {
134			delete $self->{trial}{$endpoint}
135			unless @_;
136			$g = shift;
137			};
138			;
139
140			[$w, \$g]
141			};
142			} else {
143	root	1.10	$self->fail (transport_error => $self->{noderef}, "unable to connect");
144	root	1.1	}
145
146	root	1.5	$self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
147	root	1.16	delete $self->{retry};
148	root	1.1	$self->connect;
149			};
150			}
151
152	root	1.13	package AnyEvent::MP::Node::Slave;
153
154			use base "AnyEvent::MP::Node::Direct";
155
156			sub connect {
157			my ($self) = @_;
158
159			$self->fail (transport_error => $self->{noderef}, "unable to connect to slave node");
160			}
161
162	root	1.1	package AnyEvent::MP::Node::Self;
163
164			use base "AnyEvent::MP::Node";
165
166			sub set_transport {
167	root	1.12	Carp::confess "FATAL error, set_transport was called on local node";
168	root	1.1	}
169
170			sub send {
171	root	1.6	local $AnyEvent::MP::Base::SRCNODE = $_[0];
172			AnyEvent::MP::Base::_inject (@{ $_[1] });
173			}
174
175	root	1.7	sub kill {
176			my ($self, $port, @reason) = @_;
177
178			delete $AnyEvent::MP::Base::PORT{$port};
179	root	1.8	delete $AnyEvent::MP::Base::PORT_DATA{$port};
180	root	1.7
181			my $mon = delete $AnyEvent::MP::Base::LMON{$port}
182	root	1.8	or !@reason
183			or $AnyEvent::MP::Base::WARN->("unmonitored local port $port died with reason: @reason");
184	root	1.7
185			$_->(@reason) for values %$mon;
186			}
187
188	root	1.6	sub monitor {
189			my ($self, $portid, $cb) = @_;
190
191	root	1.14	return $cb->(no_such_port => "cannot monitor nonexistent port")
192	root	1.6	unless exists $AnyEvent::MP::Base::PORT{$portid};
193
194			$AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb;
195			}
196
197			sub unmonitor {
198			my ($self, $portid, $cb) = @_;
199
200			delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0};
201	root	1.1	}
202
203			=head1 SEE ALSO
204
205			L<AnyEvent>.
206
207			=head1 AUTHOR
208
209			Marc Lehmann <schmorp@schmorp.de>
210			http://home.schmorp.de/
211
212			=cut
213
214			1
215