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, $noderef) = @_;

   $self = bless { noderef => $noderef }, $self;

   $self->transport_reset;

   $self
}

sub send {
   &{ shift->{send} }
}

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) = @_;

   # first connect with a master node
   $AnyEvent::MP::Kernel::SLAVE->($self)
      if ref $AnyEvent::MP::Kernel::SLAVE;

   $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) = @_;

   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->{noderef}, "unable to connect");
      };

   unless ($self->{connect_w}) {
      my @endpoints;
      my %trial;

      $self->{connect_w} = AE::timer
         0,
         $AnyEvent::MP::Config::CFG{connect_interval} || $AnyEvent::MP::Kernel::CONNECT_INTERVAL,
         sub {
            @endpoints = split /,/, $self->{noderef}
               unless @endpoints;

            my $endpoint = shift @endpoints;

            $trial{$endpoint} ||= do {
               my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
                  or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{noderef}: not a resolved node reference.");

               AnyEvent::MP::Transport::mp_connect
                  $host, $port,
                  sub { delete $trial{$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::Direct;

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

package AnyEvent::MP::Node::Indirect;

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

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

   my (undef, $master) = split /\@/, $self->{noderef}, 2;
   $master =~ s/!/,/g;
   $master
}

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

   if ($self->{transport}) {
      # as an optimisation, immediately nuke slave nodes
      delete $AnyEvent::MP::Kernel::NODE{$self->{noderef}};
   } else {
      $self->SUPER::transport_reset;
      return;#d##TODO#

      my $noderef = $self->{noderef};
      my $master = $self->master;

      # slave nodes are so cool - we can always send to them :)

      $self->{send} = sub {
         $self->connect;
         snd $master, snd => $noderef, @_;
      };
   }
}

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

   #TODO#
#   # ask for a connection, #TODO# rate-limit this somehow
#   snd $self->master, relay => $self->{noderef}, connect_node => $AnyEvent::MP::Kernel::NODE;
}

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 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:	1.25
Committed:	Sat Aug 15 15:08:07 2009 UTC (14 years, 9 months ago) by root
Branch:	MAIN
Changes since 1.24:	+2 -2 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, $noderef) = @_;
25
26	$self = bless { noderef => $noderef }, $self;
27
28	$self->transport_reset;
29
30	$self
31	}
32
33	sub send {
34	&{ shift->{send} }
35	}
36
37	package AnyEvent::MP::Node::External;
38
39	use base "AnyEvent::MP::Node";
40
41	# called at init time, mostly sets {send}
42	sub transport_reset {
43	my ($self) = @_;
44
45	delete $self->{transport};
46
47	Scalar::Util::weaken $self;
48
49	$self->{send} = sub {
50	push @{$self->{queue}}, shift;
51	$self->connect;
52	};
53
54	$self->connect
55	if $self->{autoconnect};
56	}
57
58	# called only after successful handshake
59	sub transport_error {
60	my ($self, @reason) = @_;
61
62	my $no_transport = !$self->{transport};
63
64	delete $self->{connect_w};
65	delete $self->{connect_to};
66
67	delete $self->{queue};
68	$self->transport_reset;
69
70	AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
71	unless $no_transport;
72
73	if (my $mon = delete $self->{lmon}) {
74	$_->(@reason) for map @$_, values %$mon;
75	}
76	}
77
78	# called after handshake was successful
79	sub transport_connect {
80	my ($self, $transport) = @_;
81
82	# first connect with a master node
83	$AnyEvent::MP::Kernel::SLAVE->($self)
84	if ref $AnyEvent::MP::Kernel::SLAVE;
85
86	$self->transport_error (transport_error => "switched connections")
87	if $self->{transport};
88
89	delete $self->{connect_w};
90	delete $self->{connect_to};
91
92	$self->{transport} = $transport;
93
94	my $transport_send = $transport->can ("send");
95
96	$self->{send} = sub {
97	$transport_send->($transport, $_[0]);
98	};
99
100	AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
101
102	$transport->send ($_)
103	for @{ delete $self->{queue} \|\| [] };
104	}
105
106	sub connect {
107	my ($self) = @_;
108
109	return if $self->{transport};
110
111	Scalar::Util::weaken $self;
112
113	$self->{connect_to} \|\|= AE::timer
114	$AnyEvent::MP::Config::CFG{monitor_timeout} \|\| $AnyEvent::MP::Kernel::MONITOR_TIMEOUT,
115	0,
116	sub {
117	$self->transport_error (transport_error => $self->{noderef}, "unable to connect");
118	};
119
120	unless ($self->{connect_w}) {
121	my @endpoints;
122	my %trial;
123
124	$self->{connect_w} = AE::timer
125	0,
126	$AnyEvent::MP::Config::CFG{connect_interval} \|\| $AnyEvent::MP::Kernel::CONNECT_INTERVAL,
127	sub {
128	@endpoints = split /,/, $self->{noderef}
129	unless @endpoints;
130
131	my $endpoint = shift @endpoints;
132
133	$trial{$endpoint} \|\|= do {
134	my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
135	or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{noderef}: not a resolved node reference.");
136
137	AnyEvent::MP::Transport::mp_connect
138	$host, $port,
139	sub { delete $trial{$endpoint} }
140	;
141	};
142	}
143	;
144	}
145	}
146
147	sub kill {
148	my ($self, $port, @reason) = @_;
149
150	$self->send (["", kil => $port, @reason]);
151	}
152
153	sub monitor {
154	my ($self, $portid, $cb) = @_;
155
156	my $list = $self->{lmon}{$portid} \|\|= [];
157
158	$self->send (["", mon1 => $portid])
159	unless @$list \|\| !length $portid;
160
161	push @$list, $cb;
162	}
163
164	sub unmonitor {
165	my ($self, $portid, $cb) = @_;
166
167	my $list = $self->{lmon}{$portid}
168	or return;
169
170	@$list = grep $_ != $cb, @$list;
171
172	unless (@$list) {
173	$self->send (["", mon0 => $portid]);
174	delete $self->{monitor}{$portid};
175	}
176	}
177
178	package AnyEvent::MP::Node::Direct;
179
180	use base "AnyEvent::MP::Node::External";
181
182	package AnyEvent::MP::Node::Indirect;
183
184	use base "AnyEvent::MP::Node::Direct";
185
186	sub master {
187	my ($self) = @_;
188
189	my (undef, $master) = split /\@/, $self->{noderef}, 2;
190	$master =~ s/!/,/g;
191	$master
192	}
193
194	sub transport_reset {
195	my ($self) = @_;
196
197	if ($self->{transport}) {
198	# as an optimisation, immediately nuke slave nodes
199	delete $AnyEvent::MP::Kernel::NODE{$self->{noderef}};
200	} else {
201	$self->SUPER::transport_reset;
202	return;#d##TODO#
203
204	my $noderef = $self->{noderef};
205	my $master = $self->master;
206
207	# slave nodes are so cool - we can always send to them :)
208
209	$self->{send} = sub {
210	$self->connect;
211	snd $master, snd => $noderef, @_;
212	};
213	}
214	}
215
216	sub connect {
217	my ($self) = @_;
218
219	#TODO#
220	# # ask for a connection, #TODO# rate-limit this somehow
221	# snd $self->master, relay => $self->{noderef}, connect_node => $AnyEvent::MP::Kernel::NODE;
222	}
223
224	package AnyEvent::MP::Node::Self;
225
226	use base "AnyEvent::MP::Node";
227
228	sub connect {
229	# we are trivially connected
230	}
231
232	sub transport_reset {
233	my ($self) = @_;
234
235	Scalar::Util::weaken $self;
236
237	$self->{send} = sub {
238	local $AnyEvent::MP::Kernel::SRCNODE = $self;
239	AnyEvent::MP::Kernel::_inject (@{ $_[0] });
240	};
241	}
242
243	sub kill {
244	my ($self, $port, @reason) = @_;
245
246	delete $AnyEvent::MP::Kernel::PORT{$port};
247	delete $AnyEvent::MP::Kernel::PORT_DATA{$port};
248
249	my $mon = delete $AnyEvent::MP::Kernel::LMON{$port}
250	or !@reason
251	or $AnyEvent::MP::Kernel::WARN->(2, "unmonitored local port $port died with reason: @reason");
252
253	$_->(@reason) for values %$mon;
254	}
255
256	sub monitor {
257	my ($self, $portid, $cb) = @_;
258
259	return $cb->(no_such_port => "cannot monitor nonexistent port")
260	unless exists $AnyEvent::MP::Kernel::PORT{$portid};
261
262	$AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb;
263	}
264
265	sub unmonitor {
266	my ($self, $portid, $cb) = @_;
267
268	delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0};
269	}
270
271	=head1 SEE ALSO
272
273	L<AnyEvent::MP>.
274
275	=head1 AUTHOR
276
277	Marc Lehmann <schmorp@schmorp.de>
278	http://home.schmorp.de/
279
280	=cut
281
282	1
283