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 ($self, $noderef) = @_;

   $self = bless { noderef => $noderef }, $self;

   $self->transport_reset;

   $self
}

sub send {
   &{ shift->{send} }
}

package AnyEvent::MP::Node::External;

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

# called at init time, mostly sets {send}
sub transport_reset {
   my ($self) = @_;

   delete $self->{transport};

   Scalar::Util::weaken $self;

   $self->{send} = sub {
      push @{$self->{queue}}, shift;
      $self->connect;
   };
}

# called only after successful handshake
sub transport_error {
   my ($self, @reason) = @_;

   my $no_transport = !$self->{transport};

   delete $self->{connect_w};
   delete $self->{connect_to};

   delete $self->{queue};
   $self->transport_reset;

   AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
      unless $no_transport;

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

# called after handshake was successful
sub transport_connect {
   my ($self, $transport) = @_;

   $self->transport_error (transport_error => "switched connections")
      if $self->{transport};

   delete $self->{connect_w};
   delete $self->{connect_to};

   $self->{transport} = $transport;

   my $transport_send = $transport->can ("send");

   $self->{send} = sub {
      $transport_send->($transport, $_[0]);
   };

   AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);

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

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

   Scalar::Util::weaken $self;

   $self->{connect_to} ||= AE::timer
      $AnyEvent::MP::Config::CFG{monitor_timeout} || $AnyEvent::MP::Kernel::MONITOR_TIMEOUT,
      0,
      sub {
         $self->transport_error (transport_error => $self->{noderef}, "unable to connect");
      };

   unless ($self->{connect_w}) {
      my @endpoints;
      my %trial;

      $self->{connect_w} = AE::timer
         0,
         $AnyEvent::MP::Config::CFG{connect_interval} || $AnyEvent::MP::Kernel::CONNECT_INTERVAL,
         sub {
            @endpoints = split /,/, $self->{noderef}
               unless @endpoints;

            my $endpoint = shift @endpoints;

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

               AnyEvent::MP::Transport::mp_connect
                  $host, $port,
                  sub { delete $trial{$endpoint} }
               ;
            };
         }
      ;
   }
}

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};
   }
}

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

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

package AnyEvent::MP::Node::Indirect;

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

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

   # as an optimisation, immediately nuke slave nodes
   delete $AnyEvent::MP::Kernel::NODE{$self->{noderef}}
      if $self->{transport};

   $self->SUPER::transport_reset;
}

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

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

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

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

sub connect {
   # we are trivially connected
}

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

   Scalar::Util::weaken $self;

   $self->{send} = sub {
      local $AnyEvent::MP::Kernel::SRCNODE = $self;
      AnyEvent::MP::Kernel::_inject (@{ $_[0] });
   };
}

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

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

   my $mon = delete $AnyEvent::MP::Kernel::LMON{$port}
      or !@reason
      or $AnyEvent::MP::Kernel::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 $AnyEvent::MP::Kernel::PORT{$portid};

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

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

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

=head1 SEE ALSO

L<AnyEvent::MP>.

=head1 AUTHOR

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

=cut

1

Revision:	1.22
Committed:	Thu Aug 13 22:50:47 2009 UTC (14 years, 11 months ago) by root
Branch:	MAIN
CVS Tags:	rel-0_7
Changes since 1.21:	+10 -0 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	root	1.18	my ($self, $noderef) = @_;
25	root	1.1
26	root	1.18	$self = bless { noderef => $noderef }, $self;
27	root	1.1
28	root	1.18	$self->transport_reset;
29	root	1.1
30	root	1.18	$self
31			}
32	root	1.1
33			sub send {
34	root	1.19	&{ shift->{send} }
35	root	1.1	}
36
37	root	1.18	package AnyEvent::MP::Node::External;
38	root	1.7
39	root	1.18	use base "AnyEvent::MP::Node";
40	root	1.7
41	root	1.18	# called at init time, mostly sets {send}
42			sub transport_reset {
43			my ($self) = @_;
44	root	1.6
45	root	1.18	delete $self->{transport};
46	root	1.6
47	root	1.19	Scalar::Util::weaken $self;
48
49	root	1.18	$self->{send} = sub {
50	root	1.19	push @{$self->{queue}}, shift;
51			$self->connect;
52	root	1.18	};
53	root	1.6	}
54
55	root	1.18	# called only after successful handshake
56			sub transport_error {
57			my ($self, @reason) = @_;
58	root	1.6
59	root	1.21	my $no_transport = !$self->{transport};
60
61			delete $self->{connect_w};
62			delete $self->{connect_to};
63	root	1.20
64	root	1.18	delete $self->{queue};
65			$self->transport_reset;
66	root	1.6
67	root	1.21	AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
68			unless $no_transport;
69	root	1.20
70	root	1.18	if (my $mon = delete $self->{lmon}) {
71			$_->(@reason) for map @$_, values %$mon;
72	root	1.6	}
73			}
74
75	root	1.18	# called after handshake was successful
76			sub transport_connect {
77	root	1.1	my ($self, $transport) = @_;
78
79	root	1.20	$self->transport_error (transport_error => "switched connections")
80	root	1.6	if $self->{transport};
81
82	root	1.18	delete $self->{connect_w};
83			delete $self->{connect_to};
84	root	1.8
85	root	1.15	$self->{transport} = $transport;
86	root	1.1
87	root	1.19	my $transport_send = $transport->can ("send");
88
89	root	1.18	$self->{send} = sub {
90	root	1.19	$transport_send->($transport, $_[0]);
91	root	1.18	};
92
93	root	1.20	AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
94
95	root	1.1	$transport->send ($_)
96			for @{ delete $self->{queue} \|\| [] };
97			}
98
99	root	1.18	sub connect {
100			my ($self) = @_;
101
102			Scalar::Util::weaken $self;
103	root	1.8
104	root	1.18	$self->{connect_to} \|\|= AE::timer
105			$AnyEvent::MP::Config::CFG{monitor_timeout} \|\| $AnyEvent::MP::Kernel::MONITOR_TIMEOUT,
106			0,
107			sub {
108			$self->transport_error (transport_error => $self->{noderef}, "unable to connect");
109			};
110	root	1.1
111	root	1.18	unless ($self->{connect_w}) {
112			my @endpoints;
113			my %trial;
114
115			$self->{connect_w} = AE::timer
116			0,
117			$AnyEvent::MP::Config::CFG{connect_interval} \|\| $AnyEvent::MP::Kernel::CONNECT_INTERVAL,
118			sub {
119			@endpoints = split /,/, $self->{noderef}
120			unless @endpoints;
121
122			my $endpoint = shift @endpoints;
123
124			$trial{$endpoint} \|\|= do {
125			my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
126			or return $AnyEvent::MP::Kernel::WARN->("$self->{noderef}: not a resolved node reference.");
127
128			AnyEvent::MP::Transport::mp_connect
129			$host, $port,
130			sub { delete $trial{$endpoint} }
131			;
132			};
133			}
134			;
135	root	1.6	}
136	root	1.8	}
137
138	root	1.18	sub kill {
139			my ($self, $port, @reason) = @_;
140	root	1.4
141	root	1.18	$self->send (["", kil => $port, @reason]);
142	root	1.1	}
143
144	root	1.18	sub monitor {
145			my ($self, $portid, $cb) = @_;
146
147			my $list = $self->{lmon}{$portid} \|\|= [];
148
149			$self->send (["", mon1 => $portid])
150			unless @$list;
151	root	1.1
152	root	1.18	push @$list, $cb;
153			}
154	root	1.1
155	root	1.18	sub unmonitor {
156			my ($self, $portid, $cb) = @_;
157	root	1.1
158	root	1.18	my $list = $self->{lmon}{$portid}
159			or return;
160	root	1.1
161	root	1.18	@$list = grep $_ != $cb, @$list;
162	root	1.1
163	root	1.18	unless (@$list) {
164			$self->send (["", mon0 => $portid]);
165			delete $self->{monitor}{$portid};
166	root	1.1	}
167	root	1.18	}
168	root	1.1
169	root	1.18	package AnyEvent::MP::Node::Direct;
170
171			use base "AnyEvent::MP::Node::External";
172	root	1.1
173	root	1.18	package AnyEvent::MP::Node::Indirect;
174	root	1.13
175			use base "AnyEvent::MP::Node::Direct";
176
177	root	1.22	sub transport_reset {
178			my ($self) = @_;
179
180			# as an optimisation, immediately nuke slave nodes
181			delete $AnyEvent::MP::Kernel::NODE{$self->{noderef}}
182			if $self->{transport};
183
184			$self->SUPER::transport_reset;
185			}
186
187	root	1.13	sub connect {
188			my ($self) = @_;
189
190	root	1.18	$self->transport_error (transport_error => $self->{noderef}, "unable to connect to indirect node");
191	root	1.13	}
192
193	root	1.1	package AnyEvent::MP::Node::Self;
194
195			use base "AnyEvent::MP::Node";
196
197	root	1.20	sub connect {
198			# we are trivially connected
199			}
200
201	root	1.18	sub transport_reset {
202			my ($self) = @_;
203	root	1.1
204	root	1.19	Scalar::Util::weaken $self;
205
206	root	1.18	$self->{send} = sub {
207	root	1.19	local $AnyEvent::MP::Kernel::SRCNODE = $self;
208			AnyEvent::MP::Kernel::_inject (@{ $_[0] });
209	root	1.18	};
210	root	1.6	}
211
212	root	1.7	sub kill {
213			my ($self, $port, @reason) = @_;
214
215	root	1.18	delete $AnyEvent::MP::Kernel::PORT{$port};
216			delete $AnyEvent::MP::Kernel::PORT_DATA{$port};
217	root	1.7
218	root	1.18	my $mon = delete $AnyEvent::MP::Kernel::LMON{$port}
219	root	1.8	or !@reason
220	root	1.18	or $AnyEvent::MP::Kernel::WARN->("unmonitored local port $port died with reason: @reason");
221	root	1.7
222			$_->(@reason) for values %$mon;
223			}
224
225	root	1.6	sub monitor {
226			my ($self, $portid, $cb) = @_;
227
228	root	1.14	return $cb->(no_such_port => "cannot monitor nonexistent port")
229	root	1.18	unless exists $AnyEvent::MP::Kernel::PORT{$portid};
230	root	1.6
231	root	1.18	$AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb;
232	root	1.6	}
233
234			sub unmonitor {
235			my ($self, $portid, $cb) = @_;
236
237	root	1.18	delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0};
238	root	1.1	}
239
240			=head1 SEE ALSO
241
242	root	1.17	L<AnyEvent::MP>.
243	root	1.1
244			=head1 AUTHOR
245
246			Marc Lehmann <schmorp@schmorp.de>
247			http://home.schmorp.de/
248
249			=cut
250
251			1
252