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 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;

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

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

# 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:	1.31
Committed:	Fri Aug 28 23:06:33 2009 UTC (14 years, 9 months ago) by root
Branch:	MAIN
CVS Tags:	rel-0_9
Changes since 1.30:	+3 -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			$self->connect;
60	root	1.18	};
61	root	1.6	}
62
63	root	1.18	# called only after successful handshake
64			sub transport_error {
65			my ($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 $no_transport;
81	root	1.6	}
82
83	root	1.18	# called after handshake was successful
84			sub transport_connect {
85	root	1.1	my ($self, $transport) = @_;
86
87	root	1.28	delete $self->{trial};
88
89	root	1.20	$self->transport_error (transport_error => "switched connections")
90	root	1.6	if $self->{transport};
91
92	root	1.18	delete $self->{connect_w};
93			delete $self->{connect_to};
94	root	1.8
95	root	1.15	$self->{transport} = $transport;
96	root	1.1
97	root	1.19	my $transport_send = $transport->can ("send");
98
99	root	1.18	$self->{send} = sub {
100	root	1.19	$transport_send->($transport, $_[0]);
101	root	1.18	};
102
103	root	1.20	AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
104
105	root	1.1	$transport->send ($_)
106			for @{ delete $self->{queue} \|\| [] };
107			}
108
109	root	1.18	sub connect {
110	root	1.28	my ($self, @addresses) = @_;
111	root	1.18
112	root	1.23	return if $self->{transport};
113
114	root	1.18	Scalar::Util::weaken $self;
115	root	1.8
116	root	1.18	$self->{connect_to} \|\|= AE::timer
117			$AnyEvent::MP::Config::CFG{monitor_timeout} \|\| $AnyEvent::MP::Kernel::MONITOR_TIMEOUT,
118			0,
119			sub {
120	root	1.28	$self->transport_error (transport_error => $self->{id}, "unable to connect");
121	root	1.18	};
122	root	1.1
123	root	1.29	return unless @addresses;
124
125	root	1.28	$AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]");
126
127	root	1.18	unless ($self->{connect_w}) {
128			my @endpoints;
129
130			$self->{connect_w} = AE::timer
131	root	1.26	rand,
132	root	1.18	$AnyEvent::MP::Config::CFG{connect_interval} \|\| $AnyEvent::MP::Kernel::CONNECT_INTERVAL,
133			sub {
134	root	1.28	@endpoints = @addresses
135	root	1.18	unless @endpoints;
136
137			my $endpoint = shift @endpoints;
138
139	root	1.28	$AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint");
140
141			$self->{trial}{$endpoint} \|\|= do {
142	root	1.18	my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
143	root	1.28	or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");
144	root	1.18
145			AnyEvent::MP::Transport::mp_connect
146			$host, $port,
147	root	1.28	sub { delete $self->{trial}{$endpoint} },
148	root	1.18	};
149			}
150			;
151	root	1.6	}
152	root	1.8	}
153
154	root	1.18	sub kill {
155			my ($self, $port, @reason) = @_;
156	root	1.4
157	root	1.18	$self->send (["", kil => $port, @reason]);
158	root	1.1	}
159
160	root	1.18	sub monitor {
161			my ($self, $portid, $cb) = @_;
162
163			my $list = $self->{lmon}{$portid} \|\|= [];
164
165			$self->send (["", mon1 => $portid])
166	root	1.24	unless @$list \|\| !length $portid;
167	root	1.1
168	root	1.18	push @$list, $cb;
169			}
170	root	1.1
171	root	1.18	sub unmonitor {
172			my ($self, $portid, $cb) = @_;
173	root	1.1
174	root	1.18	my $list = $self->{lmon}{$portid}
175			or return;
176	root	1.1
177	root	1.18	@$list = grep $_ != $cb, @$list;
178	root	1.1
179	root	1.18	unless (@$list) {
180			$self->send (["", mon0 => $portid]);
181			delete $self->{monitor}{$portid};
182	root	1.1	}
183	root	1.18	}
184	root	1.1
185	root	1.27	# used for direct slave connections as well
186	root	1.18	package AnyEvent::MP::Node::Direct;
187
188			use base "AnyEvent::MP::Node::External";
189	root	1.1
190			package AnyEvent::MP::Node::Self;
191
192			use base "AnyEvent::MP::Node";
193
194	root	1.20	sub connect {
195			# we are trivially connected
196			}
197
198	root	1.18	sub transport_reset {
199			my ($self) = @_;
200	root	1.1
201	root	1.19	Scalar::Util::weaken $self;
202
203	root	1.18	$self->{send} = sub {
204	root	1.19	local $AnyEvent::MP::Kernel::SRCNODE = $self;
205			AnyEvent::MP::Kernel::_inject (@{ $_[0] });
206	root	1.18	};
207	root	1.6	}
208
209	root	1.28	sub transport_connect {
210			my ($self, $tp) = @_;
211
212			$AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})");
213			}
214
215	root	1.7	sub kill {
216			my ($self, $port, @reason) = @_;
217
218	root	1.18	delete $AnyEvent::MP::Kernel::PORT{$port};
219			delete $AnyEvent::MP::Kernel::PORT_DATA{$port};
220	root	1.7
221	root	1.18	my $mon = delete $AnyEvent::MP::Kernel::LMON{$port}
222	root	1.8	or !@reason
223	root	1.25	or $AnyEvent::MP::Kernel::WARN->(2, "unmonitored local port $port died with reason: @reason");
224	root	1.7
225			$_->(@reason) for values %$mon;
226			}
227
228	root	1.6	sub monitor {
229			my ($self, $portid, $cb) = @_;
230
231	root	1.14	return $cb->(no_such_port => "cannot monitor nonexistent port")
232	root	1.18	unless exists $AnyEvent::MP::Kernel::PORT{$portid};
233	root	1.6
234	root	1.18	$AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb;
235	root	1.6	}
236
237			sub unmonitor {
238			my ($self, $portid, $cb) = @_;
239
240	root	1.18	delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0};
241	root	1.1	}
242
243			=head1 SEE ALSO
244
245	root	1.17	L<AnyEvent::MP>.
246	root	1.1
247			=head1 AUTHOR
248
249			Marc Lehmann <schmorp@schmorp.de>
250			http://home.schmorp.de/
251
252			=cut
253
254			1
255