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::;

our $VERSION = '0.0';

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

   $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
      $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:	1.15
Committed:	Sat Aug 8 21:56:29 2009 UTC (14 years, 9 months ago) by root
Branch:	MAIN
Changes since 1.14:	+1 -16 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			use base Exporter::;
24
25			our $VERSION = '0.0';
26
27			sub new {
28			my ($class, $noderef) = @_;
29
30			bless { noderef => $noderef }, $class
31			}
32
33			package AnyEvent::MP::Node::Direct;
34
35			use base "AnyEvent::MP::Node";
36
37			sub send {
38			my ($self, $msg) = @_;
39
40			if ($self->{transport}) {
41			$self->{transport}->send ($msg);
42			} elsif ($self->{queue}) {
43			push @{ $self->{queue} }, $msg;
44			} else {
45			$self->{queue} = [$msg];
46			$self->connect;
47			}
48			}
49
50	root	1.7	sub kill {
51			my ($self, $port, @reason) = @_;
52
53			$self->send (["", kil => $port, @reason]);
54			}
55
56	root	1.6	sub monitor {
57			my ($self, $portid, $cb) = @_;
58
59			my $list = $self->{lmon}{$portid} \|\|= [];
60
61			$self->send (["", mon1 => $portid])
62			unless @$list;
63
64			push @$list, $cb;
65			}
66
67			sub unmonitor {
68			my ($self, $portid, $cb) = @_;
69
70			my $list = $self->{lmon}{$portid}
71			or return;
72
73			@$list = grep $_ != $cb, @$list;
74
75			unless (@$list) {
76			$self->send (["", mon0 => $portid]);
77			delete $self->{monitor}{$portid};
78			}
79			}
80
81	root	1.1	sub set_transport {
82			my ($self, $transport) = @_;
83
84	root	1.6	$self->clr_transport
85			if $self->{transport};
86
87	root	1.8	delete $self->{trial};
88			delete $self->{next_connect};
89
90	root	1.15	$self->{transport} = $transport;
91	root	1.1
92			$transport->send ($_)
93			for @{ delete $self->{queue} \|\| [] };
94			}
95
96	root	1.8	sub fail {
97			my ($self, @reason) = @_;
98
99			delete $self->{queue};
100	root	1.1
101	root	1.8	if (my $mon = delete $self->{lmon}) {
102			$_->(@reason) for map @$_, values %$mon;
103	root	1.6	}
104	root	1.8	}
105
106			sub clr_transport {
107			my ($self, @reason) = @_;
108	root	1.4
109	root	1.8	delete $self->{transport};
110	root	1.4	$self->connect;
111	root	1.1	}
112
113			sub connect {
114			my ($self) = @_;
115
116			Scalar::Util::weaken $self;
117
118	root	1.9	$self->{retry} \|\|= [split /,/, $self->{noderef}];
119	root	1.1
120			my $endpoint = shift @{ $self->{retry} };
121
122			if (defined $endpoint) {
123			$self->{trial}{$endpoint} \|\|= do {
124			my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
125	root	1.9	or return $AnyEvent::MP::Base::WARN->("$self->{noderef}: not a resolved node reference.");
126	root	1.1
127			my ($w, $g);
128
129	root	1.5	$w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub {
130	root	1.1	delete $self->{trial}{$endpoint};
131			};
132			$g = AnyEvent::MP::Transport::mp_connect
133			$host, $port,
134			sub {
135			delete $self->{trial}{$endpoint}
136			unless @_;
137			$g = shift;
138			};
139			;
140
141			[$w, \$g]
142			};
143			} else {
144			delete $self->{retry};
145	root	1.10	$self->fail (transport_error => $self->{noderef}, "unable to connect");
146	root	1.1	}
147
148	root	1.5	$self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
149	root	1.1	$self->connect;
150			};
151			}
152
153	root	1.13	package AnyEvent::MP::Node::Slave;
154
155			use base "AnyEvent::MP::Node::Direct";
156
157			sub connect {
158			my ($self) = @_;
159
160			$self->fail (transport_error => $self->{noderef}, "unable to connect to slave node");
161			}
162
163	root	1.1	package AnyEvent::MP::Node::Self;
164
165			use base "AnyEvent::MP::Node";
166
167			sub set_transport {
168	root	1.12	Carp::confess "FATAL error, set_transport was called on local node";
169	root	1.1	}
170
171			sub send {
172	root	1.6	local $AnyEvent::MP::Base::SRCNODE = $_[0];
173			AnyEvent::MP::Base::_inject (@{ $_[1] });
174			}
175
176	root	1.7	sub kill {
177			my ($self, $port, @reason) = @_;
178
179			delete $AnyEvent::MP::Base::PORT{$port};
180	root	1.8	delete $AnyEvent::MP::Base::PORT_DATA{$port};
181	root	1.7
182			my $mon = delete $AnyEvent::MP::Base::LMON{$port}
183	root	1.8	or !@reason
184			or $AnyEvent::MP::Base::WARN->("unmonitored local port $port died with reason: @reason");
185	root	1.7
186			$_->(@reason) for values %$mon;
187			}
188
189	root	1.6	sub monitor {
190			my ($self, $portid, $cb) = @_;
191
192	root	1.14	return $cb->(no_such_port => "cannot monitor nonexistent port")
193	root	1.6	unless exists $AnyEvent::MP::Base::PORT{$portid};
194
195			$AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb;
196			}
197
198			sub unmonitor {
199			my ($self, $portid, $cb) = @_;
200
201			delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0};
202	root	1.1	}
203
204			=head1 SEE ALSO
205
206			L<AnyEvent>.
207
208			=head1 AUTHOR
209
210			Marc Lehmann <schmorp@schmorp.de>
211			http://home.schmorp.de/
212
213			=cut
214
215			1
216