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 $AnyEvent::MP::Kernel::WARN->("$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->("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:	1.24
Committed:	Sat Aug 15 04:34:34 2009 UTC (14 years, 9 months ago) by root
Branch:	MAIN
Changes since 1.23:	+2 -2 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	=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	root	1.6	use AnyEvent::Util ();
19	root	1.1	use AnyEvent::Socket ();
20
21			use AnyEvent::MP::Transport ();
22
23			sub new {
24	root	1.18	my ($self, $noderef) = @_;
25	root	1.1
26	root	1.18	$self = bless { noderef => $noderef }, $self;
27	root	1.1
28	root	1.18	$self->transport_reset;
29	root	1.1
30	root	1.18	$self
31			}
32	root	1.1
33			sub send {
34	root	1.19	&{ shift->{send} }
35	root	1.1	}
36
37	root	1.18	package AnyEvent::MP::Node::External;
38	root	1.7
39	root	1.18	use base "AnyEvent::MP::Node";
40	root	1.7
41	root	1.18	# called at init time, mostly sets {send}
42			sub transport_reset {
43			my ($self) = @_;
44	root	1.6
45	root	1.18	delete $self->{transport};
46	root	1.6
47	root	1.19	Scalar::Util::weaken $self;
48
49	root	1.18	$self->{send} = sub {
50	root	1.19	push @{$self->{queue}}, shift;
51			$self->connect;
52	root	1.18	};
53	root	1.23
54			$self->connect
55			if $self->{autoconnect};
56	root	1.6	}
57
58	root	1.18	# called only after successful handshake
59			sub transport_error {
60			my ($self, @reason) = @_;
61	root	1.6
62	root	1.21	my $no_transport = !$self->{transport};
63
64			delete $self->{connect_w};
65			delete $self->{connect_to};
66	root	1.20
67	root	1.18	delete $self->{queue};
68			$self->transport_reset;
69	root	1.6
70	root	1.21	AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
71			unless $no_transport;
72	root	1.20
73	root	1.18	if (my $mon = delete $self->{lmon}) {
74			$_->(@reason) for map @$_, values %$mon;
75	root	1.6	}
76			}
77
78	root	1.18	# called after handshake was successful
79			sub transport_connect {
80	root	1.1	my ($self, $transport) = @_;
81
82	root	1.23	# first connect with a master node
83			$AnyEvent::MP::Kernel::SLAVE->($self)
84			if ref $AnyEvent::MP::Kernel::SLAVE;
85
86	root	1.20	$self->transport_error (transport_error => "switched connections")
87	root	1.6	if $self->{transport};
88
89	root	1.18	delete $self->{connect_w};
90			delete $self->{connect_to};
91	root	1.8
92	root	1.15	$self->{transport} = $transport;
93	root	1.1
94	root	1.19	my $transport_send = $transport->can ("send");
95
96	root	1.18	$self->{send} = sub {
97	root	1.19	$transport_send->($transport, $_[0]);
98	root	1.18	};
99
100	root	1.20	AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
101
102	root	1.1	$transport->send ($_)
103			for @{ delete $self->{queue} \|\| [] };
104			}
105
106	root	1.18	sub connect {
107			my ($self) = @_;
108
109	root	1.23	return if $self->{transport};
110
111	root	1.18	Scalar::Util::weaken $self;
112	root	1.8
113	root	1.18	$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 => $self->{noderef}, "unable to connect");
118			};
119	root	1.1
120	root	1.18	unless ($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 $AnyEvent::MP::Kernel::WARN->("$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	root	1.6	}
145	root	1.8	}
146
147	root	1.18	sub kill {
148			my ($self, $port, @reason) = @_;
149	root	1.4
150	root	1.18	$self->send (["", kil => $port, @reason]);
151	root	1.1	}
152
153	root	1.18	sub monitor {
154			my ($self, $portid, $cb) = @_;
155
156			my $list = $self->{lmon}{$portid} \|\|= [];
157
158			$self->send (["", mon1 => $portid])
159	root	1.24	unless @$list \|\| !length $portid;
160	root	1.1
161	root	1.18	push @$list, $cb;
162			}
163	root	1.1
164	root	1.18	sub unmonitor {
165			my ($self, $portid, $cb) = @_;
166	root	1.1
167	root	1.18	my $list = $self->{lmon}{$portid}
168			or return;
169	root	1.1
170	root	1.18	@$list = grep $_ != $cb, @$list;
171	root	1.1
172	root	1.18	unless (@$list) {
173			$self->send (["", mon0 => $portid]);
174			delete $self->{monitor}{$portid};
175	root	1.1	}
176	root	1.18	}
177	root	1.1
178	root	1.18	package AnyEvent::MP::Node::Direct;
179
180			use base "AnyEvent::MP::Node::External";
181	root	1.1
182	root	1.18	package AnyEvent::MP::Node::Indirect;
183	root	1.13
184			use base "AnyEvent::MP::Node::Direct";
185
186	root	1.23	sub master {
187			my ($self) = @_;
188
189			my (undef, $master) = split /\@/, $self->{noderef}, 2;
190			$master =~ s/!/,/g;
191			$master
192			}
193
194	root	1.22	sub transport_reset {
195			my ($self) = @_;
196
197	root	1.23	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	root	1.24	snd $master, snd => $noderef, @_;
212	root	1.23	};
213			}
214	root	1.22	}
215
216	root	1.13	sub connect {
217			my ($self) = @_;
218
219	root	1.23	#TODO#
220			# # ask for a connection, #TODO# rate-limit this somehow
221			# snd $self->master, relay => $self->{noderef}, connect_node => $AnyEvent::MP::Kernel::NODE;
222	root	1.13	}
223
224	root	1.1	package AnyEvent::MP::Node::Self;
225
226			use base "AnyEvent::MP::Node";
227
228	root	1.20	sub connect {
229			# we are trivially connected
230			}
231
232	root	1.18	sub transport_reset {
233			my ($self) = @_;
234	root	1.1
235	root	1.19	Scalar::Util::weaken $self;
236
237	root	1.18	$self->{send} = sub {
238	root	1.19	local $AnyEvent::MP::Kernel::SRCNODE = $self;
239			AnyEvent::MP::Kernel::_inject (@{ $_[0] });
240	root	1.18	};
241	root	1.6	}
242
243	root	1.7	sub kill {
244			my ($self, $port, @reason) = @_;
245
246	root	1.18	delete $AnyEvent::MP::Kernel::PORT{$port};
247			delete $AnyEvent::MP::Kernel::PORT_DATA{$port};
248	root	1.7
249	root	1.18	my $mon = delete $AnyEvent::MP::Kernel::LMON{$port}
250	root	1.8	or !@reason
251	root	1.18	or $AnyEvent::MP::Kernel::WARN->("unmonitored local port $port died with reason: @reason");
252	root	1.7
253			$_->(@reason) for values %$mon;
254			}
255
256	root	1.6	sub monitor {
257			my ($self, $portid, $cb) = @_;
258
259	root	1.14	return $cb->(no_such_port => "cannot monitor nonexistent port")
260	root	1.18	unless exists $AnyEvent::MP::Kernel::PORT{$portid};
261	root	1.6
262	root	1.18	$AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb;
263	root	1.6	}
264
265			sub unmonitor {
266			my ($self, $portid, $cb) = @_;
267
268	root	1.18	delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0};
269	root	1.1	}
270
271			=head1 SEE ALSO
272
273	root	1.17	L<AnyEvent::MP>.
274	root	1.1
275			=head1 AUTHOR
276
277			Marc Lehmann <schmorp@schmorp.de>
278			http://home.schmorp.de/
279
280			=cut
281
282			1
283