AnyEvent-MP/MP/Node.pm

=head1 NAME

AnyEvent::MP::Node - represent a node

=head1 SYNOPSIS

   use AnyEvent::MP::Node;

=head1 DESCRIPTION

This is an internal utility module, horrible to look at, so don't.

=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;
   };
}

# called each time we fail to establish a connection,
# or the existing connection failed
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;

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

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

   # if we are here and are idle, we nuke ourselves
   delete $AnyEvent::MP::Kernel::NODE{$self->{id}}
      unless $self->{transport} || $self->{connect_to};
}

# 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;

   my $monitor = $AnyEvent::MP::Config::CFG{monitor_timeout} || $AnyEvent::MP::Kernel::MONITOR_TIMEOUT;

   $self->{connect_to} ||= AE::timer $monitor, 0, sub {
      $self->transport_error (transport_error => $self->{id}, "unable to connect");
   };

   return unless @addresses;
   return if $self->{connect_w};

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

   my $interval = $AnyEvent::MP::Config::CFG{connect_interval} || $AnyEvent::MP::Kernel::CONNECT_INTERVAL;

   $interval = ($monitor - $interval) / @addresses
      if ($monitor - $interval) / @addresses < $interval;

   $interval = 0.4 if $interval < 0.4;

   my @endpoints;

   $self->{connect_w} = AE::timer 0.050 * rand, $interval * (0.9 + 0.1 * rand), 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->(8, "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:	1.35
Committed:	Thu Sep 3 20:16:36 2009 UTC (14 years, 8 months ago) by root
Branch:	MAIN
Changes since 1.34:	+1 -1 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	=head1 NAME
2
3	root	1.31	AnyEvent::MP::Node - represent a node
4	root	1.1
5			=head1 SYNOPSIS
6
7			use AnyEvent::MP::Node;
8
9			=head1 DESCRIPTION
10
11	root	1.31	This is an internal utility module, horrible to look at, so don't.
12
13	root	1.1	=cut
14
15			package AnyEvent::MP::Node;
16
17			use common::sense;
18
19			use AE ();
20	root	1.6	use AnyEvent::Util ();
21	root	1.1	use AnyEvent::Socket ();
22
23			use AnyEvent::MP::Transport ();
24
25			sub new {
26	root	1.28	my ($self, $id) = @_;
27	root	1.1
28	root	1.28	$self = bless { id => $id }, $self;
29	root	1.1
30	root	1.27	$self->init;
31	root	1.18	$self->transport_reset;
32	root	1.1
33	root	1.18	$self
34			}
35	root	1.1
36	root	1.27	sub init {
37			#
38			}
39
40	root	1.1	sub send {
41	root	1.19	&{ shift->{send} }
42	root	1.1	}
43
44	root	1.27	# nodes reachable via the network
45	root	1.18	package AnyEvent::MP::Node::External;
46	root	1.7
47	root	1.18	use base "AnyEvent::MP::Node";
48	root	1.7
49	root	1.18	# called at init time, mostly sets {send}
50			sub transport_reset {
51			my ($self) = @_;
52	root	1.6
53	root	1.18	delete $self->{transport};
54	root	1.6
55	root	1.19	Scalar::Util::weaken $self;
56
57	root	1.18	$self->{send} = sub {
58	root	1.19	push @{$self->{queue}}, shift;
59			$self->connect;
60	root	1.18	};
61	root	1.6	}
62
63	root	1.32	# called each time we fail to establish a connection,
64			# or the existing connection failed
65	root	1.18	sub transport_error {
66			my ($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	1.18	if (my $mon = delete $self->{lmon}) {
77			$_->(@reason) for map @$_, values %$mon;
78	root	1.6	}
79	root	1.30
80			AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
81			unless $no_transport;
82	root	1.32
83			# if we are here and are idle, we nuke ourselves
84			delete $AnyEvent::MP::Kernel::NODE{$self->{id}}
85			unless $self->{transport} \|\| $self->{connect_to};
86	root	1.6	}
87
88	root	1.18	# called after handshake was successful
89			sub transport_connect {
90	root	1.1	my ($self, $transport) = @_;
91
92	root	1.28	delete $self->{trial};
93
94	root	1.20	$self->transport_error (transport_error => "switched connections")
95	root	1.6	if $self->{transport};
96
97	root	1.18	delete $self->{connect_w};
98			delete $self->{connect_to};
99	root	1.8
100	root	1.15	$self->{transport} = $transport;
101	root	1.1
102	root	1.19	my $transport_send = $transport->can ("send");
103
104	root	1.18	$self->{send} = sub {
105	root	1.19	$transport_send->($transport, $_[0]);
106	root	1.18	};
107
108	root	1.20	AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
109
110	root	1.1	$transport->send ($_)
111			for @{ delete $self->{queue} \|\| [] };
112			}
113
114	root	1.18	sub connect {
115	root	1.28	my ($self, @addresses) = @_;
116	root	1.18
117	root	1.23	return if $self->{transport};
118
119	root	1.18	Scalar::Util::weaken $self;
120	root	1.8
121	root	1.33	my $monitor = $AnyEvent::MP::Config::CFG{monitor_timeout} \|\| $AnyEvent::MP::Kernel::MONITOR_TIMEOUT;
122
123			$self->{connect_to} \|\|= AE::timer $monitor, 0, sub {
124			$self->transport_error (transport_error => $self->{id}, "unable to connect");
125			};
126	root	1.1
127	root	1.29	return unless @addresses;
128	root	1.33	return if $self->{connect_w};
129	root	1.29
130	root	1.28	$AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]");
131
132	root	1.33	my $interval = $AnyEvent::MP::Config::CFG{connect_interval} \|\| $AnyEvent::MP::Kernel::CONNECT_INTERVAL;
133
134			$interval = ($monitor - $interval) / @addresses
135			if ($monitor - $interval) / @addresses < $interval;
136
137			$interval = 0.4 if $interval < 0.4;
138
139			my @endpoints;
140
141	root	1.34	$self->{connect_w} = AE::timer 0.050 * rand, $interval * (0.9 + 0.1 * rand), sub {
142	root	1.33	@endpoints = @addresses
143			unless @endpoints;
144	root	1.18
145	root	1.33	my $endpoint = shift @endpoints;
146
147			$AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint");
148
149			$self->{trial}{$endpoint} \|\|= do {
150			my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
151			or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");
152
153			AnyEvent::MP::Transport::mp_connect
154			$host, $port,
155			sub { delete $self->{trial}{$endpoint} },
156			};
157			};
158	root	1.8	}
159
160	root	1.18	sub kill {
161			my ($self, $port, @reason) = @_;
162	root	1.4
163	root	1.18	$self->send (["", kil => $port, @reason]);
164	root	1.1	}
165
166	root	1.18	sub monitor {
167			my ($self, $portid, $cb) = @_;
168
169			my $list = $self->{lmon}{$portid} \|\|= [];
170
171			$self->send (["", mon1 => $portid])
172	root	1.24	unless @$list \|\| !length $portid;
173	root	1.1
174	root	1.18	push @$list, $cb;
175			}
176	root	1.1
177	root	1.18	sub unmonitor {
178			my ($self, $portid, $cb) = @_;
179	root	1.1
180	root	1.18	my $list = $self->{lmon}{$portid}
181			or return;
182	root	1.1
183	root	1.18	@$list = grep $_ != $cb, @$list;
184	root	1.1
185	root	1.18	unless (@$list) {
186			$self->send (["", mon0 => $portid]);
187			delete $self->{monitor}{$portid};
188	root	1.1	}
189	root	1.18	}
190	root	1.1
191	root	1.27	# used for direct slave connections as well
192	root	1.18	package AnyEvent::MP::Node::Direct;
193
194			use base "AnyEvent::MP::Node::External";
195	root	1.1
196			package AnyEvent::MP::Node::Self;
197
198			use base "AnyEvent::MP::Node";
199
200	root	1.20	sub connect {
201			# we are trivially connected
202			}
203
204	root	1.18	sub transport_reset {
205			my ($self) = @_;
206	root	1.1
207	root	1.19	Scalar::Util::weaken $self;
208
209	root	1.18	$self->{send} = sub {
210	root	1.19	local $AnyEvent::MP::Kernel::SRCNODE = $self;
211			AnyEvent::MP::Kernel::_inject (@{ $_[0] });
212	root	1.18	};
213	root	1.6	}
214
215	root	1.28	sub transport_connect {
216			my ($self, $tp) = @_;
217
218			$AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})");
219			}
220
221	root	1.7	sub kill {
222			my ($self, $port, @reason) = @_;
223
224	root	1.18	delete $AnyEvent::MP::Kernel::PORT{$port};
225			delete $AnyEvent::MP::Kernel::PORT_DATA{$port};
226	root	1.7
227	root	1.18	my $mon = delete $AnyEvent::MP::Kernel::LMON{$port}
228	root	1.8	or !@reason
229	root	1.35	or $AnyEvent::MP::Kernel::WARN->(8, "unmonitored local port $port died with reason: @reason");
230	root	1.7
231			$_->(@reason) for values %$mon;
232			}
233
234	root	1.6	sub monitor {
235			my ($self, $portid, $cb) = @_;
236
237	root	1.14	return $cb->(no_such_port => "cannot monitor nonexistent port")
238	root	1.18	unless exists $AnyEvent::MP::Kernel::PORT{$portid};
239	root	1.6
240	root	1.18	$AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb;
241	root	1.6	}
242
243			sub unmonitor {
244			my ($self, $portid, $cb) = @_;
245
246	root	1.18	delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0};
247	root	1.1	}
248
249			=head1 SEE ALSO
250
251	root	1.17	L<AnyEvent::MP>.
252	root	1.1
253			=head1 AUTHOR
254
255			Marc Lehmann <schmorp@schmorp.de>
256			http://home.schmorp.de/
257
258			=cut
259
260			1
261