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->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) = @_;

   $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};

   # just ignore connect requests for slave nodes - let's hope it connects to us instead
   return if $self->{noderef} =~ /^slave\//;

   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
         rand,
         $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};
   }
}

# 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 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:	1.27
Committed:	Thu Aug 27 07:12:48 2009 UTC (14 years, 9 months ago) by root
Branch:	MAIN
Changes since 1.26:	+10 -46 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->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	$self->transport_error (transport_error => "switched connections")
89	if $self->{transport};
90
91	delete $self->{connect_w};
92	delete $self->{connect_to};
93
94	$self->{transport} = $transport;
95
96	my $transport_send = $transport->can ("send");
97
98	$self->{send} = sub {
99	$transport_send->($transport, $_[0]);
100	};
101
102	AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
103
104	$transport->send ($_)
105	for @{ delete $self->{queue} \|\| [] };
106	}
107
108	sub connect {
109	my ($self) = @_;
110
111	return if $self->{transport};
112
113	# just ignore connect requests for slave nodes - let's hope it connects to us instead
114	return if $self->{noderef} =~ /^slave\//;
115
116	Scalar::Util::weaken $self;
117
118	$self->{connect_to} \|\|= AE::timer
119	$AnyEvent::MP::Config::CFG{monitor_timeout} \|\| $AnyEvent::MP::Kernel::MONITOR_TIMEOUT,
120	0,
121	sub {
122	$self->transport_error (transport_error => $self->{noderef}, "unable to connect");
123	};
124
125	unless ($self->{connect_w}) {
126	my @endpoints;
127	my %trial;
128
129	$self->{connect_w} = AE::timer
130	rand,
131	$AnyEvent::MP::Config::CFG{connect_interval} \|\| $AnyEvent::MP::Kernel::CONNECT_INTERVAL,
132	sub {
133	@endpoints = split /,/, $self->{noderef}
134	unless @endpoints;
135
136	my $endpoint = shift @endpoints;
137
138	$trial{$endpoint} \|\|= do {
139	my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
140	or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{noderef}: not a resolved node reference.");
141
142	AnyEvent::MP::Transport::mp_connect
143	$host, $port,
144	sub { delete $trial{$endpoint} }
145	;
146	};
147	}
148	;
149	}
150	}
151
152	sub kill {
153	my ($self, $port, @reason) = @_;
154
155	$self->send (["", kil => $port, @reason]);
156	}
157
158	sub monitor {
159	my ($self, $portid, $cb) = @_;
160
161	my $list = $self->{lmon}{$portid} \|\|= [];
162
163	$self->send (["", mon1 => $portid])
164	unless @$list \|\| !length $portid;
165
166	push @$list, $cb;
167	}
168
169	sub unmonitor {
170	my ($self, $portid, $cb) = @_;
171
172	my $list = $self->{lmon}{$portid}
173	or return;
174
175	@$list = grep $_ != $cb, @$list;
176
177	unless (@$list) {
178	$self->send (["", mon0 => $portid]);
179	delete $self->{monitor}{$portid};
180	}
181	}
182
183	# used for direct slave connections as well
184	package AnyEvent::MP::Node::Direct;
185
186	use base "AnyEvent::MP::Node::External";
187
188	package AnyEvent::MP::Node::Self;
189
190	use base "AnyEvent::MP::Node";
191
192	sub connect {
193	# we are trivially connected
194	}
195
196	sub transport_reset {
197	my ($self) = @_;
198
199	Scalar::Util::weaken $self;
200
201	$self->{send} = sub {
202	local $AnyEvent::MP::Kernel::SRCNODE = $self;
203	AnyEvent::MP::Kernel::_inject (@{ $_[0] });
204	};
205	}
206
207	sub kill {
208	my ($self, $port, @reason) = @_;
209
210	delete $AnyEvent::MP::Kernel::PORT{$port};
211	delete $AnyEvent::MP::Kernel::PORT_DATA{$port};
212
213	my $mon = delete $AnyEvent::MP::Kernel::LMON{$port}
214	or !@reason
215	or $AnyEvent::MP::Kernel::WARN->(2, "unmonitored local port $port died with reason: @reason");
216
217	$_->(@reason) for values %$mon;
218	}
219
220	sub monitor {
221	my ($self, $portid, $cb) = @_;
222
223	return $cb->(no_such_port => "cannot monitor nonexistent port")
224	unless exists $AnyEvent::MP::Kernel::PORT{$portid};
225
226	$AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb;
227	}
228
229	sub unmonitor {
230	my ($self, $portid, $cb) = @_;
231
232	delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0};
233	}
234
235	=head1 SEE ALSO
236
237	L<AnyEvent::MP>.
238
239	=head1 AUTHOR
240
241	Marc Lehmann <schmorp@schmorp.de>
242	http://home.schmorp.de/
243
244	=cut
245
246	1
247