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, $id) = @_;

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

   $self->init;
   $self->transport_reset;

   $self
}

sub init {
   #
}

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

# nodes reachable via the network
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;
   };

   $self->connect
     if $self->{autoconnect};
}

# 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) = @_;

   delete $self->{trial};

   $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, @addresses) = @_;

   return if $self->{transport};

   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->{id}, "unable to connect");
      };

   return unless @addresses;

   $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]");

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

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

            my $endpoint = shift @endpoints;

            $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint");

            $self->{trial}{$endpoint} ||= do {
               my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
                  or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");

               AnyEvent::MP::Transport::mp_connect
                  $host, $port,
                  sub { delete $self->{trial}{$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 || !length $portid;

   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};
   }
}

# used for direct slave connections as well
package AnyEvent::MP::Node::Direct;

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

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 transport_connect {
   my ($self, $tp) = @_;

   $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})");
}

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->(2, "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:	1.29
Committed:	Fri Aug 28 00:31:14 2009 UTC (14 years, 9 months ago) by root
Branch:	MAIN
Changes since 1.28:	+2 -1 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	1.28	my ($self, $id) = @_;
25	root	1.1
26	root	1.28	$self = bless { id => $id }, $self;
27	root	1.1
28	root	1.27	$self->init;
29	root	1.18	$self->transport_reset;
30	root	1.1
31	root	1.18	$self
32			}
33	root	1.1
34	root	1.27	sub init {
35			#
36			}
37
38	root	1.1	sub send {
39	root	1.19	&{ shift->{send} }
40	root	1.1	}
41
42	root	1.27	# nodes reachable via the network
43	root	1.18	package AnyEvent::MP::Node::External;
44	root	1.7
45	root	1.18	use base "AnyEvent::MP::Node";
46	root	1.7
47	root	1.18	# called at init time, mostly sets {send}
48			sub transport_reset {
49			my ($self) = @_;
50	root	1.6
51	root	1.18	delete $self->{transport};
52	root	1.6
53	root	1.19	Scalar::Util::weaken $self;
54
55	root	1.18	$self->{send} = sub {
56	root	1.19	push @{$self->{queue}}, shift;
57			$self->connect;
58	root	1.18	};
59	root	1.23
60			$self->connect
61			if $self->{autoconnect};
62	root	1.6	}
63
64	root	1.18	# called only after successful handshake
65			sub transport_error {
66			my ($self, @reason) = @_;
67	root	1.6
68	root	1.21	my $no_transport = !$self->{transport};
69
70			delete $self->{connect_w};
71			delete $self->{connect_to};
72	root	1.20
73	root	1.18	delete $self->{queue};
74			$self->transport_reset;
75	root	1.6
76	root	1.21	AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
77			unless $no_transport;
78	root	1.20
79	root	1.18	if (my $mon = delete $self->{lmon}) {
80			$_->(@reason) for map @$_, values %$mon;
81	root	1.6	}
82			}
83
84	root	1.18	# called after handshake was successful
85			sub transport_connect {
86	root	1.1	my ($self, $transport) = @_;
87
88	root	1.28	delete $self->{trial};
89
90	root	1.20	$self->transport_error (transport_error => "switched connections")
91	root	1.6	if $self->{transport};
92
93	root	1.18	delete $self->{connect_w};
94			delete $self->{connect_to};
95	root	1.8
96	root	1.15	$self->{transport} = $transport;
97	root	1.1
98	root	1.19	my $transport_send = $transport->can ("send");
99
100	root	1.18	$self->{send} = sub {
101	root	1.19	$transport_send->($transport, $_[0]);
102	root	1.18	};
103
104	root	1.20	AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
105
106	root	1.1	$transport->send ($_)
107			for @{ delete $self->{queue} \|\| [] };
108			}
109
110	root	1.18	sub connect {
111	root	1.28	my ($self, @addresses) = @_;
112	root	1.18
113	root	1.23	return if $self->{transport};
114
115	root	1.18	Scalar::Util::weaken $self;
116	root	1.8
117	root	1.18	$self->{connect_to} \|\|= AE::timer
118			$AnyEvent::MP::Config::CFG{monitor_timeout} \|\| $AnyEvent::MP::Kernel::MONITOR_TIMEOUT,
119			0,
120			sub {
121	root	1.28	$self->transport_error (transport_error => $self->{id}, "unable to connect");
122	root	1.18	};
123	root	1.1
124	root	1.29	return unless @addresses;
125
126	root	1.28	$AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]");
127
128	root	1.18	unless ($self->{connect_w}) {
129			my @endpoints;
130
131			$self->{connect_w} = AE::timer
132	root	1.26	rand,
133	root	1.18	$AnyEvent::MP::Config::CFG{connect_interval} \|\| $AnyEvent::MP::Kernel::CONNECT_INTERVAL,
134			sub {
135	root	1.28	@endpoints = @addresses
136	root	1.18	unless @endpoints;
137
138			my $endpoint = shift @endpoints;
139
140	root	1.28	$AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint");
141
142			$self->{trial}{$endpoint} \|\|= do {
143	root	1.18	my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
144	root	1.28	or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");
145	root	1.18
146			AnyEvent::MP::Transport::mp_connect
147			$host, $port,
148	root	1.28	sub { delete $self->{trial}{$endpoint} },
149	root	1.18	};
150			}
151			;
152	root	1.6	}
153	root	1.8	}
154
155	root	1.18	sub kill {
156			my ($self, $port, @reason) = @_;
157	root	1.4
158	root	1.18	$self->send (["", kil => $port, @reason]);
159	root	1.1	}
160
161	root	1.18	sub monitor {
162			my ($self, $portid, $cb) = @_;
163
164			my $list = $self->{lmon}{$portid} \|\|= [];
165
166			$self->send (["", mon1 => $portid])
167	root	1.24	unless @$list \|\| !length $portid;
168	root	1.1
169	root	1.18	push @$list, $cb;
170			}
171	root	1.1
172	root	1.18	sub unmonitor {
173			my ($self, $portid, $cb) = @_;
174	root	1.1
175	root	1.18	my $list = $self->{lmon}{$portid}
176			or return;
177	root	1.1
178	root	1.18	@$list = grep $_ != $cb, @$list;
179	root	1.1
180	root	1.18	unless (@$list) {
181			$self->send (["", mon0 => $portid]);
182			delete $self->{monitor}{$portid};
183	root	1.1	}
184	root	1.18	}
185	root	1.1
186	root	1.27	# used for direct slave connections as well
187	root	1.18	package AnyEvent::MP::Node::Direct;
188
189			use base "AnyEvent::MP::Node::External";
190	root	1.1
191			package AnyEvent::MP::Node::Self;
192
193			use base "AnyEvent::MP::Node";
194
195	root	1.20	sub connect {
196			# we are trivially connected
197			}
198
199	root	1.18	sub transport_reset {
200			my ($self) = @_;
201	root	1.1
202	root	1.19	Scalar::Util::weaken $self;
203
204	root	1.18	$self->{send} = sub {
205	root	1.19	local $AnyEvent::MP::Kernel::SRCNODE = $self;
206			AnyEvent::MP::Kernel::_inject (@{ $_[0] });
207	root	1.18	};
208	root	1.6	}
209
210	root	1.28	sub transport_connect {
211			my ($self, $tp) = @_;
212
213			$AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})");
214			}
215
216	root	1.7	sub kill {
217			my ($self, $port, @reason) = @_;
218
219	root	1.18	delete $AnyEvent::MP::Kernel::PORT{$port};
220			delete $AnyEvent::MP::Kernel::PORT_DATA{$port};
221	root	1.7
222	root	1.18	my $mon = delete $AnyEvent::MP::Kernel::LMON{$port}
223	root	1.8	or !@reason
224	root	1.25	or $AnyEvent::MP::Kernel::WARN->(2, "unmonitored local port $port died with reason: @reason");
225	root	1.7
226			$_->(@reason) for values %$mon;
227			}
228
229	root	1.6	sub monitor {
230			my ($self, $portid, $cb) = @_;
231
232	root	1.14	return $cb->(no_such_port => "cannot monitor nonexistent port")
233	root	1.18	unless exists $AnyEvent::MP::Kernel::PORT{$portid};
234	root	1.6
235	root	1.18	$AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb;
236	root	1.6	}
237
238			sub unmonitor {
239			my ($self, $portid, $cb) = @_;
240
241	root	1.18	delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0};
242	root	1.1	}
243
244			=head1 SEE ALSO
245
246	root	1.17	L<AnyEvent::MP>.
247	root	1.1
248			=head1 AUTHOR
249
250			Marc Lehmann <schmorp@schmorp.de>
251			http://home.schmorp.de/
252
253			=cut
254
255			1
256