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; # base class for nodes

use common::sense;

use AnyEvent ();
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::Remote; # a remote node

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 => $self->{id}, "switched connections")
      if $self->{transport};

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

   $self->{transport} = $transport;

   my $transport_send = $transport->{send};

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

   $self->{send} = $transport_send;

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

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

   return if $self->{transport};
   return if $self->{connect_w};

   Scalar::Util::weaken $self;

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

   # maybe @$addresses?
   my $addresses = $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}};

   if ($addresses) {
      $self->connect_to ($addresses);
   } else {
      # on global nodes, all bets are off now - we either know the node, or we don't
      unless ($AnyEvent::MP::Kernel::GLOBAL) {
         AnyEvent::MP::Kernel::g_find ($self->{id});
      }
   }
}

sub connect_to {
   my ($self, $addresses) = @_;

   return if $self->{transport};
   return if $self->{connect_w};

   return unless @$addresses;
   
   AE::log 9 => "connecting to $self->{id} with [@$addresses]";

   my $monitor  = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
   my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};

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

   $interval = 0.4 if $interval < 0.4;

   my @endpoints = reverse @$addresses;

   $self->{connect_w} = AE::timer 0, $interval * (0.9 + 0.1 * rand), sub {
      my $endpoint = pop @endpoints;

      AE::log 9 => "connecting to $self->{id} at $endpoint";

      $self->{trial}{$endpoint} ||= do {
         my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
            or return AE::log critical => "$self->{id}: '$endpoint' is 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};
   }
}

package AnyEvent::MP::Node::Self; # the local node

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

sub connect {
   # we are trivially connected
}

# delay every so often to avoid recursion, also used to delay after spawn
our $DELAY = -50;
our @DELAY;
our $DELAY_W;

our $send_delayed = sub {
   $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
   (shift @DELAY)->()
      while @DELAY;
   undef $DELAY_W;
   $DELAY = -50;
};

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

   Scalar::Util::weaken $self;

   $self->{send} = sub {
      if (++$DELAY > 0) {
         my $msg = $_[0];
         push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
         $DELAY_W ||= AE::timer 0, 0, $send_delayed;
         return;
      }

      local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
      AnyEvent::MP::Kernel::_inject (@{ $_[0] });
   };
}

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

   AE::log 9 => "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})";
}

sub kill {
   my (undef, @args) = @_;

   # we _always_ delay kil's, to avoid calling mon callbacks
   # from anything but the event loop context.
   $DELAY = 1;
   push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
   $DELAY_W ||= AE::timer 0, 0, $send_delayed;
}

sub monitor {
   # maybe always delay, too?
   if ($DELAY_W) {
      my @args = @_;
      push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
      return;
   }
   &AnyEvent::MP::Kernel::_monitor;
}

sub unmonitor {
   # no need to always delay
   if ($DELAY_W) {
      my @args = @_;
      push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) };
      return;
   }

   &AnyEvent::MP::Kernel::_unmonitor;
}

=head1 SEE ALSO

L<AnyEvent::MP>.

=head1 AUTHOR

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

=cut

1

Revision:	1.65
Committed:	Fri Mar 23 21:16:36 2012 UTC (12 years, 2 months ago) by root
Branch:	MAIN
Changes since 1.64:	+0 -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	root	1.64	package AnyEvent::MP::Node; # base class for nodes
16	root	1.1
17			use common::sense;
18
19	root	1.63	use AnyEvent ();
20	root	1.1	use AnyEvent::Socket ();
21
22			use AnyEvent::MP::Transport ();
23
24			sub new {
25	root	1.28	my ($self, $id) = @_;
26	root	1.1
27	root	1.28	$self = bless { id => $id }, $self;
28	root	1.1
29	root	1.27	$self->init;
30	root	1.18	$self->transport_reset;
31	root	1.1
32	root	1.18	$self
33			}
34	root	1.1
35	root	1.27	sub init {
36			#
37			}
38
39	root	1.1	sub send {
40	root	1.19	&{ shift->{send} }
41	root	1.1	}
42
43	root	1.27	# nodes reachable via the network
44	root	1.64	package AnyEvent::MP::Node::Remote; # a remote node
45	root	1.7
46	root	1.18	use base "AnyEvent::MP::Node";
47	root	1.7
48	root	1.18	# called at init time, mostly sets {send}
49			sub transport_reset {
50			my ($self) = @_;
51	root	1.6
52	root	1.18	delete $self->{transport};
53	root	1.6
54	root	1.19	Scalar::Util::weaken $self;
55
56	root	1.18	$self->{send} = sub {
57	root	1.19	push @{$self->{queue}}, shift;
58			$self->connect;
59	root	1.18	};
60	root	1.6	}
61
62	root	1.32	# called each time we fail to establish a connection,
63			# or the existing connection failed
64	root	1.18	sub transport_error {
65			my ($self, @reason) = @_;
66	root	1.6
67	root	1.21	my $no_transport = !$self->{transport};
68
69			delete $self->{connect_w};
70			delete $self->{connect_to};
71	root	1.20
72	root	1.18	delete $self->{queue};
73			$self->transport_reset;
74	root	1.6
75	root	1.18	if (my $mon = delete $self->{lmon}) {
76			$_->(@reason) for map @$_, values %$mon;
77	root	1.6	}
78	root	1.30
79			AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
80			unless $no_transport;
81	root	1.32
82			# if we are here and are idle, we nuke ourselves
83			delete $AnyEvent::MP::Kernel::NODE{$self->{id}}
84			unless $self->{transport} \|\| $self->{connect_to};
85	root	1.6	}
86
87	root	1.18	# called after handshake was successful
88			sub transport_connect {
89	root	1.1	my ($self, $transport) = @_;
90
91	root	1.28	delete $self->{trial};
92
93	root	1.51	$self->transport_error (transport_error => $self->{id}, "switched connections")
94	root	1.6	if $self->{transport};
95
96	root	1.18	delete $self->{connect_w};
97			delete $self->{connect_to};
98	root	1.8
99	root	1.15	$self->{transport} = $transport;
100	root	1.1
101	root	1.52	my $transport_send = $transport->{send};
102	root	1.19
103	root	1.46	AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
104
105	root	1.52	$self->{send} = $transport_send;
106	root	1.18
107	root	1.52	$transport_send->($_)
108	root	1.1	for @{ delete $self->{queue} \|\| [] };
109			}
110
111	root	1.18	sub connect {
112	root	1.53	my ($self) = @_;
113	root	1.18
114	root	1.23	return if $self->{transport};
115	root	1.55	return if $self->{connect_w};
116	root	1.23
117	root	1.18	Scalar::Util::weaken $self;
118	root	1.8
119	root	1.59	$self->{connect_to} \|\|= AE::timer $AnyEvent::MP::Kernel::CONFIG->{connect_interval}, 0, sub {
120			$self->transport_error (transport_error => $self->{id}, "unable to connect");
121			};
122
123			# maybe @$addresses?
124			my $addresses = $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}};
125
126			if ($addresses) {
127			$self->connect_to ($addresses);
128			} else {
129			# on global nodes, all bets are off now - we either know the node, or we don't
130			unless ($AnyEvent::MP::Kernel::GLOBAL) {
131			AnyEvent::MP::Kernel::g_find ($self->{id});
132			}
133			}
134			}
135
136			sub connect_to {
137			my ($self, $addresses) = @_;
138
139			return if $self->{transport};
140			return if $self->{connect_w};
141
142			return unless @$addresses;
143
144	root	1.62	AE::log 9 => "connecting to $self->{id} with [@$addresses]";
145	root	1.59
146			my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
147			my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
148
149			$interval = ($monitor - $interval) / @$addresses
150			if ($monitor - $interval) / @$addresses < $interval;
151
152			$interval = 0.4 if $interval < 0.4;
153
154			my @endpoints = reverse @$addresses;
155
156			$self->{connect_w} = AE::timer 0, $interval * (0.9 + 0.1 * rand), sub {
157			my $endpoint = pop @endpoints;
158
159	root	1.62	AE::log 9 => "connecting to $self->{id} at $endpoint";
160	root	1.59
161			$self->{trial}{$endpoint} \|\|= do {
162			my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
163	root	1.62	or return AE::log critical => "$self->{id}: '$endpoint' is not a resolved node reference.";
164	root	1.33
165			AnyEvent::MP::Transport::mp_connect
166			$host, $port,
167			sub { delete $self->{trial}{$endpoint} },
168			};
169			};
170	root	1.8	}
171
172	root	1.18	sub kill {
173			my ($self, $port, @reason) = @_;
174	root	1.4
175	root	1.53	$self->{send} (["", kil => $port, @reason]);
176	root	1.1	}
177
178	root	1.18	sub monitor {
179			my ($self, $portid, $cb) = @_;
180
181			my $list = $self->{lmon}{$portid} \|\|= [];
182
183			$self->send (["", mon1 => $portid])
184	root	1.24	unless @$list \|\| !length $portid;
185	root	1.1
186	root	1.18	push @$list, $cb;
187			}
188	root	1.1
189	root	1.18	sub unmonitor {
190			my ($self, $portid, $cb) = @_;
191	root	1.1
192	root	1.18	my $list = $self->{lmon}{$portid}
193			or return;
194	root	1.1
195	root	1.18	@$list = grep $_ != $cb, @$list;
196	root	1.1
197	root	1.18	unless (@$list) {
198			$self->send (["", mon0 => $portid]);
199			delete $self->{monitor}{$portid};
200	root	1.1	}
201	root	1.18	}
202	root	1.1
203	root	1.64	package AnyEvent::MP::Node::Self; # the local node
204	root	1.1
205			use base "AnyEvent::MP::Node";
206
207	root	1.20	sub connect {
208			# we are trivially connected
209			}
210
211	root	1.38	# delay every so often to avoid recursion, also used to delay after spawn
212	root	1.43	our $DELAY = -50;
213	root	1.38	our @DELAY;
214			our $DELAY_W;
215
216	root	1.61	our $send_delayed = sub {
217	root	1.60	$AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
218	root	1.39	(shift @DELAY)->()
219	root	1.38	while @DELAY;
220			undef $DELAY_W;
221			$DELAY = -50;
222	root	1.61	};
223	root	1.38
224	root	1.18	sub transport_reset {
225			my ($self) = @_;
226	root	1.1
227	root	1.19	Scalar::Util::weaken $self;
228
229	root	1.18	$self->{send} = sub {
230	root	1.61	if (++$DELAY > 0) {
231	root	1.39	my $msg = $_[0];
232			push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
233	root	1.61	$DELAY_W \|\|= AE::timer 0, 0, $send_delayed;
234	root	1.40	return;
235	root	1.38	}
236	root	1.40
237	root	1.60	local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
238	root	1.40	AnyEvent::MP::Kernel::_inject (@{ $_[0] });
239	root	1.18	};
240	root	1.6	}
241
242	root	1.28	sub transport_connect {
243			my ($self, $tp) = @_;
244
245	root	1.62	AE::log 9 => "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})";
246	root	1.28	}
247
248	root	1.7	sub kill {
249	root	1.49	my (undef, @args) = @_;
250	root	1.7
251	root	1.44	# we _always_ delay kil's, to avoid calling mon callbacks
252			# from anything but the event loop context.
253			$DELAY = 1;
254	root	1.48	push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
255	root	1.61	$DELAY_W \|\|= AE::timer 0, 0, $send_delayed;
256	root	1.7	}
257
258	root	1.6	sub monitor {
259	root	1.50	# maybe always delay, too?
260	root	1.49	if ($DELAY_W) {
261			my @args = @_;
262			push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
263			return;
264			}
265			&AnyEvent::MP::Kernel::_monitor;
266	root	1.6	}
267
268			sub unmonitor {
269	root	1.50	# no need to always delay
270	root	1.49	if ($DELAY_W) {
271			my @args = @_;
272			push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) };
273			return;
274			}
275	root	1.39
276	root	1.49	&AnyEvent::MP::Kernel::_unmonitor;
277	root	1.1	}
278
279			=head1 SEE ALSO
280
281	root	1.17	L<AnyEvent::MP>.
282	root	1.1
283			=head1 AUTHOR
284
285			Marc Lehmann <schmorp@schmorp.de>
286			http://home.schmorp.de/
287
288			=cut
289
290			1
291