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 *
#	Content
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	use AnyEvent::Util ();
19	use AnyEvent::Socket ();
20
21	use AnyEvent::MP::Transport ();
22
23	sub new {
24	my ($self, $id) = @_;
25
26	$self = bless { id => $id }, $self;
27
28	$self->init;
29	$self->transport_reset;
30
31	$self
32	}
33
34	sub init {
35	#
36	}
37
38	sub send {
39	&{ shift->{send} }
40	}
41
42	# nodes reachable via the network
43	package AnyEvent::MP::Node::External;
44
45	use base "AnyEvent::MP::Node";
46
47	# called at init time, mostly sets {send}
48	sub transport_reset {
49	my ($self) = @_;
50
51	delete $self->{transport};
52
53	Scalar::Util::weaken $self;
54
55	$self->{send} = sub {
56	push @{$self->{queue}}, shift;
57	$self->connect;
58	};
59
60	$self->connect
61	if $self->{autoconnect};
62	}
63
64	# called only after successful handshake
65	sub transport_error {
66	my ($self, @reason) = @_;
67
68	my $no_transport = !$self->{transport};
69
70	delete $self->{connect_w};
71	delete $self->{connect_to};
72
73	delete $self->{queue};
74	$self->transport_reset;
75
76	AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
77	unless $no_transport;
78
79	if (my $mon = delete $self->{lmon}) {
80	$_->(@reason) for map @$_, values %$mon;
81	}
82	}
83
84	# called after handshake was successful
85	sub transport_connect {
86	my ($self, $transport) = @_;
87
88	delete $self->{trial};
89
90	$self->transport_error (transport_error => "switched connections")
91	if $self->{transport};
92
93	delete $self->{connect_w};
94	delete $self->{connect_to};
95
96	$self->{transport} = $transport;
97
98	my $transport_send = $transport->can ("send");
99
100	$self->{send} = sub {
101	$transport_send->($transport, $_[0]);
102	};
103
104	AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
105
106	$transport->send ($_)
107	for @{ delete $self->{queue} \|\| [] };
108	}
109
110	sub connect {
111	my ($self, @addresses) = @_;
112
113	return if $self->{transport};
114
115	Scalar::Util::weaken $self;
116
117	$self->{connect_to} \|\|= AE::timer
118	$AnyEvent::MP::Config::CFG{monitor_timeout} \|\| $AnyEvent::MP::Kernel::MONITOR_TIMEOUT,
119	0,
120	sub {
121	$self->transport_error (transport_error => $self->{id}, "unable to connect");
122	};
123
124	return unless @addresses;
125
126	$AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]");
127
128	unless ($self->{connect_w}) {
129	my @endpoints;
130
131	$self->{connect_w} = AE::timer
132	rand,
133	$AnyEvent::MP::Config::CFG{connect_interval} \|\| $AnyEvent::MP::Kernel::CONNECT_INTERVAL,
134	sub {
135	@endpoints = @addresses
136	unless @endpoints;
137
138	my $endpoint = shift @endpoints;
139
140	$AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint");
141
142	$self->{trial}{$endpoint} \|\|= do {
143	my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
144	or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");
145
146	AnyEvent::MP::Transport::mp_connect
147	$host, $port,
148	sub { delete $self->{trial}{$endpoint} },
149	};
150	}
151	;
152	}
153	}
154
155	sub kill {
156	my ($self, $port, @reason) = @_;
157
158	$self->send (["", kil => $port, @reason]);
159	}
160
161	sub monitor {
162	my ($self, $portid, $cb) = @_;
163
164	my $list = $self->{lmon}{$portid} \|\|= [];
165
166	$self->send (["", mon1 => $portid])
167	unless @$list \|\| !length $portid;
168
169	push @$list, $cb;
170	}
171
172	sub unmonitor {
173	my ($self, $portid, $cb) = @_;
174
175	my $list = $self->{lmon}{$portid}
176	or return;
177
178	@$list = grep $_ != $cb, @$list;
179
180	unless (@$list) {
181	$self->send (["", mon0 => $portid]);
182	delete $self->{monitor}{$portid};
183	}
184	}
185
186	# used for direct slave connections as well
187	package AnyEvent::MP::Node::Direct;
188
189	use base "AnyEvent::MP::Node::External";
190
191	package AnyEvent::MP::Node::Self;
192
193	use base "AnyEvent::MP::Node";
194
195	sub connect {
196	# we are trivially connected
197	}
198
199	sub transport_reset {
200	my ($self) = @_;
201
202	Scalar::Util::weaken $self;
203
204	$self->{send} = sub {
205	local $AnyEvent::MP::Kernel::SRCNODE = $self;
206	AnyEvent::MP::Kernel::_inject (@{ $_[0] });
207	};
208	}
209
210	sub transport_connect {
211	my ($self, $tp) = @_;
212
213	$AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})");
214	}
215
216	sub kill {
217	my ($self, $port, @reason) = @_;
218
219	delete $AnyEvent::MP::Kernel::PORT{$port};
220	delete $AnyEvent::MP::Kernel::PORT_DATA{$port};
221
222	my $mon = delete $AnyEvent::MP::Kernel::LMON{$port}
223	or !@reason
224	or $AnyEvent::MP::Kernel::WARN->(2, "unmonitored local port $port died with reason: @reason");
225
226	$_->(@reason) for values %$mon;
227	}
228
229	sub monitor {
230	my ($self, $portid, $cb) = @_;
231
232	return $cb->(no_such_port => "cannot monitor nonexistent port")
233	unless exists $AnyEvent::MP::Kernel::PORT{$portid};
234
235	$AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb;
236	}
237
238	sub unmonitor {
239	my ($self, $portid, $cb) = @_;
240
241	delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0};
242	}
243
244	=head1 SEE ALSO
245
246	L<AnyEvent::MP>.
247
248	=head1 AUTHOR
249
250	Marc Lehmann <schmorp@schmorp.de>
251	http://home.schmorp.de/
252
253	=cut
254
255	1
256