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 ();

use base Exporter::;

our $VERSION = '0.0';

our $DEFAULT_PORT = "4040";

sub normalise_noderef($) {
   my ($noderef) = @_;

   my $cv = AE::cv;
   my @res;

   $cv->begin (sub {
      my %seen;
      my @refs;
      for (sort { $a->[0] <=> $b->[0] } @res) {
         push @refs, $_->[1] unless $seen{$_->[1]}++
      }
      shift->send (join ",", @refs);
   });

   $noderef = $DEFAULT_PORT unless length $noderef;

   my $idx;
   for my $t (split /,/, $noderef) {
      my $pri = ++$idx;
      
      #TODO: this should be outside normalise_noderef and in become_public
      if ($t =~ /^\d*$/) {
         require POSIX;
         my $nodename = (POSIX::uname ())[1];

         $cv->begin;
         AnyEvent::Socket::resolve_sockaddr $nodename, $t || "aemp=$DEFAULT_PORT", "tcp", 0, undef, sub {
            for (@_) {
               my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3];
               push @res, [
                  $pri += 1e-5,
                  AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service
               ];
            }
            $cv->end;
         };

#         my (undef, undef, undef, undef, @ipv4) = gethostbyname $nodename;
#
#         for (@ipv4) {
#            push @res, [
#               $pri,
#               AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $_, $t || $DEFAULT_PORT,
#            ];
#         }
      } else {
         my ($host, $port) = AnyEvent::Socket::parse_hostport $t, "aemp=$DEFAULT_PORT"
            or Carp::croak "$t: unparsable transport descriptor";

         $cv->begin;
         AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub {
            for (@_) {
               my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3];
               push @res, [
                  $pri += 1e-5,
                  AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service
               ];
            }
            $cv->end;
         }
      }
   }

   $cv->end;

   $cv
}

sub new {
   my ($class, $noderef) = @_;

   bless { noderef => $noderef }, $class
}

package AnyEvent::MP::Node::Direct;

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

sub send {
   my ($self, $msg) = @_;

   if ($self->{transport}) {
      $self->{transport}->send ($msg);
   } elsif ($self->{queue}) {
      push @{ $self->{queue} }, $msg;
   } else {
      $self->{queue} = [$msg];
      $self->connect;
   }
}

sub monitor {
   my ($self, $portid, $cb) = @_;

   return $cb->()
      if $self->{failed};

   my $list = $self->{lmon}{$portid} ||= [];

   $self->send (["", mon1 => $portid])
      unless @$list;

   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};
   }
}

sub set_transport {
   my ($self, $transport) = @_;

   $self->clr_transport
      if $self->{transport};

   delete $self->{trial};
   delete $self->{next_connect};
   delete $self->{failed};

   if (
      exists $self->{remote_uniq}
      && $self->{remote_uniq} ne $transport->{remote_uniq}
   ) {
      # uniq changed, drop queue
      delete $self->{queue};
      #TODO: "DOWN"
   }

   $self->{remote_uniq} = $transport->{remote_uniq};
   $self->{transport}   = $transport;

   $transport->send ($_)
      for @{ delete $self->{queue} || [] };
}

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

   delete $self->{transport};
   $self->{failed} = 1;

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

   $self->connect;
}

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

   Scalar::Util::weaken $self;

   unless (exists $self->{n_noderef}) {
      return if $self->{n_noderef_}++;
      (AnyEvent::MP::Node::normalise_noderef ($self->{noderef}))->cb (sub {
         $self or return;
         delete $self->{n_noderef_};
         my $noderef = shift->recv;

         $self->{n_noderef} = $noderef;

         $AnyEvent::MP::Base::NODE{$_} = $self
            for split /,/, $noderef;

         $self->connect;
      });
      return;
   }

   $self->{retry} ||= [split /,/, $self->{n_noderef}];

   my $endpoint = shift @{ $self->{retry} };

   if (defined $endpoint) {
      $self->{trial}{$endpoint} ||= do {
         my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
            or return;

         my ($w, $g);

         $w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub {
            delete $self->{trial}{$endpoint};
         };
         $g = AnyEvent::MP::Transport::mp_connect
            $host, $port,
            sub {
               delete $self->{trial}{$endpoint}
                  unless @_;
               $g = shift;
            };
         ;

         [$w, \$g]
      };
   } else {
      delete $self->{retry};
   }

   $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
      $self->connect;
   };
}

package AnyEvent::MP::Node::Self;

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

sub set_transport {
   die "FATAL error, set_transport was called";
}

sub send {
   local $AnyEvent::MP::Base::SRCNODE = $_[0];
   AnyEvent::MP::Base::_inject (@{ $_[1] });
}

sub monitor {
   my ($self, $portid, $cb) = @_;

   return $cb->()
      unless exists $AnyEvent::MP::Base::PORT{$portid};

   $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb;
}

sub unmonitor {
   my ($self, $portid, $cb) = @_;

   delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0};
}

=head1 SEE ALSO

L<AnyEvent>.

=head1 AUTHOR

 Marc Lehmann <schmorp@schmorp.de>
 http://home.schmorp.de/

=cut

1

Revision:	1.6
Committed:	Mon Aug 3 21:35:03 2009 UTC (14 years, 11 months ago) by root
Branch:	MAIN
Changes since 1.5:	+55 -1 lines
Log Message:	first round of monitoring
#	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			use base Exporter::;
24
25			our $VERSION = '0.0';
26
27	root	1.5	our $DEFAULT_PORT = "4040";
28
29			sub normalise_noderef($) {
30			my ($noderef) = @_;
31
32			my $cv = AE::cv;
33			my @res;
34
35			$cv->begin (sub {
36			my %seen;
37			my @refs;
38			for (sort { $a->[0] <=> $b->[0] } @res) {
39			push @refs, $_->[1] unless $seen{$_->[1]}++
40			}
41			shift->send (join ",", @refs);
42			});
43
44			$noderef = $DEFAULT_PORT unless length $noderef;
45
46			my $idx;
47			for my $t (split /,/, $noderef) {
48			my $pri = ++$idx;
49
50			#TODO: this should be outside normalise_noderef and in become_public
51			if ($t =~ /^\d*$/) {
52			require POSIX;
53			my $nodename = (POSIX::uname ())[1];
54
55			$cv->begin;
56			AnyEvent::Socket::resolve_sockaddr $nodename, $t \|\| "aemp=$DEFAULT_PORT", "tcp", 0, undef, sub {
57			for (@_) {
58			my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3];
59			push @res, [
60			$pri += 1e-5,
61			AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service
62			];
63			}
64			$cv->end;
65			};
66
67			# my (undef, undef, undef, undef, @ipv4) = gethostbyname $nodename;
68			#
69			# for (@ipv4) {
70			# push @res, [
71			# $pri,
72			# AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $_, $t \|\| $DEFAULT_PORT,
73			# ];
74			# }
75			} else {
76			my ($host, $port) = AnyEvent::Socket::parse_hostport $t, "aemp=$DEFAULT_PORT"
77			or Carp::croak "$t: unparsable transport descriptor";
78
79			$cv->begin;
80			AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub {
81			for (@_) {
82			my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3];
83			push @res, [
84			$pri += 1e-5,
85			AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service
86			];
87			}
88			$cv->end;
89			}
90			}
91			}
92
93			$cv->end;
94
95			$cv
96			}
97
98	root	1.1	sub new {
99			my ($class, $noderef) = @_;
100
101			bless { noderef => $noderef }, $class
102			}
103
104			package AnyEvent::MP::Node::Direct;
105
106			use base "AnyEvent::MP::Node";
107
108			sub send {
109			my ($self, $msg) = @_;
110
111			if ($self->{transport}) {
112			$self->{transport}->send ($msg);
113			} elsif ($self->{queue}) {
114			push @{ $self->{queue} }, $msg;
115			} else {
116			$self->{queue} = [$msg];
117			$self->connect;
118			}
119			}
120
121	root	1.6	sub monitor {
122			my ($self, $portid, $cb) = @_;
123
124			return $cb->()
125			if $self->{failed};
126
127			my $list = $self->{lmon}{$portid} \|\|= [];
128
129			$self->send (["", mon1 => $portid])
130			unless @$list;
131
132			push @$list, $cb;
133			}
134
135			sub unmonitor {
136			my ($self, $portid, $cb) = @_;
137
138			my $list = $self->{lmon}{$portid}
139			or return;
140
141			@$list = grep $_ != $cb, @$list;
142
143			unless (@$list) {
144			$self->send (["", mon0 => $portid]);
145			delete $self->{monitor}{$portid};
146			}
147			}
148
149	root	1.1	sub set_transport {
150			my ($self, $transport) = @_;
151
152	root	1.6	$self->clr_transport
153			if $self->{transport};
154
155	root	1.1	delete $self->{trial};
156			delete $self->{next_connect};
157	root	1.6	delete $self->{failed};
158	root	1.1
159			if (
160			exists $self->{remote_uniq}
161			&& $self->{remote_uniq} ne $transport->{remote_uniq}
162			) {
163			# uniq changed, drop queue
164			delete $self->{queue};
165			#TODO: "DOWN"
166			}
167
168			$self->{remote_uniq} = $transport->{remote_uniq};
169			$self->{transport} = $transport;
170
171			$transport->send ($_)
172			for @{ delete $self->{queue} \|\| [] };
173			}
174
175			sub clr_transport {
176			my ($self) = @_;
177
178			delete $self->{transport};
179	root	1.6	$self->{failed} = 1;
180
181			if (my $mon = delete $self->{monitor}) {
182			$_->() for map @$_, values %$mon;
183			}
184	root	1.4
185			$self->connect;
186	root	1.1	}
187
188			sub connect {
189			my ($self) = @_;
190
191			Scalar::Util::weaken $self;
192
193			unless (exists $self->{n_noderef}) {
194	root	1.5	return if $self->{n_noderef_}++;
195			(AnyEvent::MP::Node::normalise_noderef ($self->{noderef}))->cb (sub {
196	root	1.1	$self or return;
197	root	1.5	delete $self->{n_noderef_};
198	root	1.1	my $noderef = shift->recv;
199
200			$self->{n_noderef} = $noderef;
201
202	root	1.5	$AnyEvent::MP::Base::NODE{$_} = $self
203	root	1.1	for split /,/, $noderef;
204
205			$self->connect;
206			});
207			return;
208			}
209
210			$self->{retry} \|\|= [split /,/, $self->{n_noderef}];
211
212			my $endpoint = shift @{ $self->{retry} };
213
214			if (defined $endpoint) {
215			$self->{trial}{$endpoint} \|\|= do {
216			my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
217			or return;
218
219			my ($w, $g);
220
221	root	1.5	$w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub {
222	root	1.1	delete $self->{trial}{$endpoint};
223			};
224			$g = AnyEvent::MP::Transport::mp_connect
225			$host, $port,
226			sub {
227			delete $self->{trial}{$endpoint}
228			unless @_;
229			$g = shift;
230			};
231			;
232
233			[$w, \$g]
234			};
235			} else {
236			delete $self->{retry};
237			}
238
239	root	1.5	$self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
240	root	1.1	$self->connect;
241			};
242			}
243
244			package AnyEvent::MP::Node::Self;
245
246			use base "AnyEvent::MP::Node";
247
248			sub set_transport {
249			die "FATAL error, set_transport was called";
250			}
251
252			sub send {
253	root	1.6	local $AnyEvent::MP::Base::SRCNODE = $_[0];
254			AnyEvent::MP::Base::_inject (@{ $_[1] });
255			}
256
257			sub monitor {
258			my ($self, $portid, $cb) = @_;
259
260			return $cb->()
261			unless exists $AnyEvent::MP::Base::PORT{$portid};
262
263			$AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb;
264			}
265
266			sub unmonitor {
267			my ($self, $portid, $cb) = @_;
268
269			delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0};
270	root	1.1	}
271
272			=head1 SEE ALSO
273
274			L<AnyEvent>.
275
276			=head1 AUTHOR
277
278			Marc Lehmann <schmorp@schmorp.de>
279			http://home.schmorp.de/
280
281			=cut
282
283			1
284