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::Remote;

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;

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:	1.62
Committed:	Thu Mar 22 00:48:29 2012 UTC (12 years, 2 months ago) by root
Branch:	MAIN
Changes since 1.61:	+4 -59 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	$self
34			}
35	root	1.1
36	root	1.27	sub init {
37			#
38			}
39
40	root	1.1	sub send {
41	root	1.19	&{ shift->{send} }
42	root	1.1	}
43
44	root	1.27	# nodes reachable via the network
45	root	1.53	package AnyEvent::MP::Node::Remote;
46	root	1.7
47	root	1.18	use base "AnyEvent::MP::Node";
48	root	1.7
49	root	1.18	# called at init time, mostly sets {send}
50			sub transport_reset {
51			my ($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	1.51	$self->transport_error (transport_error => $self->{id}, "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	1.52	my $transport_send = $transport->{send};
103	root	1.19
104	root	1.46	AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
105
106	root	1.52	$self->{send} = $transport_send;
107	root	1.18
108	root	1.52	$transport_send->($_)
109	root	1.1	for @{ delete $self->{queue} \|\| [] };
110			}
111
112	root	1.18	sub connect {
113	root	1.53	my ($self) = @_;
114	root	1.18
115	root	1.23	return if $self->{transport};
116	root	1.55	return if $self->{connect_w};
117	root	1.23
118	root	1.18	Scalar::Util::weaken $self;
119	root	1.8
120	root	1.59	$self->{connect_to} \|\|= AE::timer $AnyEvent::MP::Kernel::CONFIG->{connect_interval}, 0, sub {
121			$self->transport_error (transport_error => $self->{id}, "unable to connect");
122			};
123
124			# maybe @$addresses?
125			my $addresses = $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}};
126
127			if ($addresses) {
128			$self->connect_to ($addresses);
129			} else {
130			# on global nodes, all bets are off now - we either know the node, or we don't
131			unless ($AnyEvent::MP::Kernel::GLOBAL) {
132			AnyEvent::MP::Kernel::g_find ($self->{id});
133			}
134			}
135			}
136
137			sub connect_to {
138			my ($self, $addresses) = @_;
139
140			return if $self->{transport};
141			return if $self->{connect_w};
142
143			return unless @$addresses;
144
145	root	1.62	AE::log 9 => "connecting to $self->{id} with [@$addresses]";
146	root	1.59
147			my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
148			my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
149
150			$interval = ($monitor - $interval) / @$addresses
151			if ($monitor - $interval) / @$addresses < $interval;
152
153			$interval = 0.4 if $interval < 0.4;
154
155			my @endpoints = reverse @$addresses;
156
157			$self->{connect_w} = AE::timer 0, $interval * (0.9 + 0.1 * rand), sub {
158			my $endpoint = pop @endpoints;
159
160	root	1.62	AE::log 9 => "connecting to $self->{id} at $endpoint";
161	root	1.59
162			$self->{trial}{$endpoint} \|\|= do {
163			my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
164	root	1.62	or return AE::log critical => "$self->{id}: '$endpoint' is not a resolved node reference.";
165	root	1.33
166			AnyEvent::MP::Transport::mp_connect
167			$host, $port,
168			sub { delete $self->{trial}{$endpoint} },
169			};
170			};
171	root	1.8	}
172
173	root	1.18	sub kill {
174			my ($self, $port, @reason) = @_;
175	root	1.4
176	root	1.53	$self->{send} (["", kil => $port, @reason]);
177	root	1.1	}
178
179	root	1.18	sub monitor {
180			my ($self, $portid, $cb) = @_;
181
182			my $list = $self->{lmon}{$portid} \|\|= [];
183
184			$self->send (["", mon1 => $portid])
185	root	1.24	unless @$list \|\| !length $portid;
186	root	1.1
187	root	1.18	push @$list, $cb;
188			}
189	root	1.1
190	root	1.18	sub unmonitor {
191			my ($self, $portid, $cb) = @_;
192	root	1.1
193	root	1.18	my $list = $self->{lmon}{$portid}
194			or return;
195	root	1.1
196	root	1.18	@$list = grep $_ != $cb, @$list;
197	root	1.1
198	root	1.18	unless (@$list) {
199			$self->send (["", mon0 => $portid]);
200			delete $self->{monitor}{$portid};
201	root	1.1	}
202	root	1.18	}
203	root	1.1
204			package AnyEvent::MP::Node::Self;
205
206			use base "AnyEvent::MP::Node";
207
208	root	1.20	sub connect {
209			# we are trivially connected
210			}
211
212	root	1.38	# delay every so often to avoid recursion, also used to delay after spawn
213	root	1.43	our $DELAY = -50;
214	root	1.38	our @DELAY;
215			our $DELAY_W;
216
217	root	1.61	our $send_delayed = sub {
218	root	1.60	$AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
219	root	1.39	(shift @DELAY)->()
220	root	1.38	while @DELAY;
221			undef $DELAY_W;
222			$DELAY = -50;
223	root	1.61	};
224	root	1.38
225	root	1.18	sub transport_reset {
226			my ($self) = @_;
227	root	1.1
228	root	1.19	Scalar::Util::weaken $self;
229
230	root	1.18	$self->{send} = sub {
231	root	1.61	if (++$DELAY > 0) {
232	root	1.39	my $msg = $_[0];
233			push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
234	root	1.61	$DELAY_W \|\|= AE::timer 0, 0, $send_delayed;
235	root	1.40	return;
236	root	1.38	}
237	root	1.40
238	root	1.60	local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
239	root	1.40	AnyEvent::MP::Kernel::_inject (@{ $_[0] });
240	root	1.18	};
241	root	1.6	}
242
243	root	1.28	sub transport_connect {
244			my ($self, $tp) = @_;
245
246	root	1.62	AE::log 9 => "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})";
247	root	1.28	}
248
249	root	1.7	sub kill {
250	root	1.49	my (undef, @args) = @_;
251	root	1.7
252	root	1.44	# we _always_ delay kil's, to avoid calling mon callbacks
253			# from anything but the event loop context.
254			$DELAY = 1;
255	root	1.48	push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
256	root	1.61	$DELAY_W \|\|= AE::timer 0, 0, $send_delayed;
257	root	1.7	}
258
259	root	1.6	sub monitor {
260	root	1.50	# maybe always delay, too?
261	root	1.49	if ($DELAY_W) {
262			my @args = @_;
263			push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
264			return;
265			}
266			&AnyEvent::MP::Kernel::_monitor;
267	root	1.6	}
268
269			sub unmonitor {
270	root	1.50	# no need to always delay
271	root	1.49	if ($DELAY_W) {
272			my @args = @_;
273			push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) };
274			return;
275			}
276	root	1.39
277	root	1.49	&AnyEvent::MP::Kernel::_unmonitor;
278	root	1.1	}
279
280			=head1 SEE ALSO
281
282	root	1.17	L<AnyEvent::MP>.
283	root	1.1
284			=head1 AUTHOR
285
286			Marc Lehmann <schmorp@schmorp.de>
287			http://home.schmorp.de/
288
289			=cut
290
291			1
292