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Comparing AnyEvent-MP/MP/Node.pm (file contents):
Revision 1.5 by root, Sun Aug 2 14:44:37 2009 UTC vs.
Revision 1.52 by root, Sat Mar 13 20:29:04 2010 UTC

1=head1 NAME 1=head1 NAME
2 2
3AnyEvent::MP::Node - a single processing node (CPU/process...) 3AnyEvent::MP::Node - represent a node
4 4
5=head1 SYNOPSIS 5=head1 SYNOPSIS
6 6
7 use AnyEvent::MP::Node; 7 use AnyEvent::MP::Node;
8 8
9=head1 DESCRIPTION 9=head1 DESCRIPTION
10 10
11This is an internal utility module, horrible to look at, so don't.
12
11=cut 13=cut
12 14
13package AnyEvent::MP::Node; 15package AnyEvent::MP::Node;
14 16
15use common::sense; 17use common::sense;
16 18
17use AE (); 19use AE ();
20use AnyEvent::Util ();
18use AnyEvent::Socket (); 21use AnyEvent::Socket ();
19 22
20use AnyEvent::MP::Transport (); 23use AnyEvent::MP::Transport ();
21 24
22use base Exporter::;
23
24our $VERSION = '0.0';
25
26our $DEFAULT_PORT = "4040";
27
28sub normalise_noderef($) {
29 my ($noderef) = @_;
30
31 my $cv = AE::cv;
32 my @res;
33
34 $cv->begin (sub {
35 my %seen;
36 my @refs;
37 for (sort { $a->[0] <=> $b->[0] } @res) {
38 push @refs, $_->[1] unless $seen{$_->[1]}++
39 }
40 shift->send (join ",", @refs);
41 });
42
43 $noderef = $DEFAULT_PORT unless length $noderef;
44
45 my $idx;
46 for my $t (split /,/, $noderef) {
47 my $pri = ++$idx;
48
49 #TODO: this should be outside normalise_noderef and in become_public
50 if ($t =~ /^\d*$/) {
51 require POSIX;
52 my $nodename = (POSIX::uname ())[1];
53
54 $cv->begin;
55 AnyEvent::Socket::resolve_sockaddr $nodename, $t || "aemp=$DEFAULT_PORT", "tcp", 0, undef, sub {
56 for (@_) {
57 my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3];
58 push @res, [
59 $pri += 1e-5,
60 AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service
61 ];
62 }
63 $cv->end;
64 };
65
66# my (undef, undef, undef, undef, @ipv4) = gethostbyname $nodename;
67#
68# for (@ipv4) {
69# push @res, [
70# $pri,
71# AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $_, $t || $DEFAULT_PORT,
72# ];
73# }
74 } else {
75 my ($host, $port) = AnyEvent::Socket::parse_hostport $t, "aemp=$DEFAULT_PORT"
76 or Carp::croak "$t: unparsable transport descriptor";
77
78 $cv->begin;
79 AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub {
80 for (@_) {
81 my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3];
82 push @res, [
83 $pri += 1e-5,
84 AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service
85 ];
86 }
87 $cv->end;
88 }
89 }
90 }
91
92 $cv->end;
93
94 $cv
95}
96
97sub new { 25sub new {
98 my ($class, $noderef) = @_; 26 my ($self, $id) = @_;
99 27
100 bless { noderef => $noderef }, $class 28 $self = bless { id => $id }, $self;
101}
102 29
30 $self->init;
31 $self->transport_reset;
32
33 $self
34}
35
36sub init {
37 #
38}
39
40sub send {
41 &{ shift->{send} }
42}
43
44# nodes reachable via the network
103package AnyEvent::MP::Node::Direct; 45package AnyEvent::MP::Node::External;
104 46
105use base "AnyEvent::MP::Node"; 47use base "AnyEvent::MP::Node";
106 48
107sub send { 49# called at init time, mostly sets {send}
50sub transport_reset {
108 my ($self, $msg) = @_; 51 my ($self) = @_;
109 52
110 if ($self->{transport}) { 53 delete $self->{transport};
111 $self->{transport}->send ($msg); 54
112 } elsif ($self->{queue}) { 55 Scalar::Util::weaken $self;
56
57 $self->{send} = sub {
113 push @{ $self->{queue} }, $msg; 58 push @{$self->{queue}}, shift;
114 } else {
115 $self->{queue} = [$msg];
116 $self->connect; 59 $self->connect;
117 } 60 };
118} 61}
119 62
63# called each time we fail to establish a connection,
64# or the existing connection failed
120sub set_transport { 65sub transport_error {
66 my ($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 if (my $mon = delete $self->{lmon}) {
77 $_->(@reason) for map @$_, values %$mon;
78 }
79
80 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
81 unless $no_transport;
82
83 # if we are here and are idle, we nuke ourselves
84 delete $AnyEvent::MP::Kernel::NODE{$self->{id}}
85 unless $self->{transport} || $self->{connect_to};
86}
87
88# called after handshake was successful
89sub transport_connect {
121 my ($self, $transport) = @_; 90 my ($self, $transport) = @_;
122 91
123 delete $self->{trial}; 92 delete $self->{trial};
93
94 $self->transport_error (transport_error => $self->{id}, "switched connections")
95 if $self->{transport};
96
97 delete $self->{connect_addr};
124 delete $self->{next_connect}; 98 delete $self->{connect_w};
99 delete $self->{connect_to};
125 100
126 if (
127 exists $self->{remote_uniq}
128 && $self->{remote_uniq} ne $transport->{remote_uniq}
129 ) {
130 # uniq changed, drop queue
131 delete $self->{queue};
132 #TODO: "DOWN"
133 }
134
135 $self->{remote_uniq} = $transport->{remote_uniq};
136 $self->{transport} = $transport; 101 $self->{transport} = $transport;
137 102
103 my $transport_send = $transport->{send};
104
105 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
106
107 $self->{send} = $transport_send;
108
138 $transport->send ($_) 109 $transport_send->($_)
139 for @{ delete $self->{queue} || [] }; 110 for @{ delete $self->{queue} || [] };
140} 111}
141 112
142sub clr_transport {
143 my ($self) = @_;
144
145 delete $self->{transport};
146
147 $self->connect;
148}
149
150sub connect { 113sub connect {
151 my ($self) = @_; 114 my ($self, @addresses) = @_;
115
116 return if $self->{transport};
152 117
153 Scalar::Util::weaken $self; 118 Scalar::Util::weaken $self;
154 119
155 unless (exists $self->{n_noderef}) { 120 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
156 return if $self->{n_noderef_}++;
157 (AnyEvent::MP::Node::normalise_noderef ($self->{noderef}))->cb (sub {
158 $self or return;
159 delete $self->{n_noderef_};
160 my $noderef = shift->recv;
161 121
162 $self->{n_noderef} = $noderef; 122 $self->{connect_to} ||= AE::timer $monitor, 0, sub {
123 $self->transport_error (transport_error => $self->{id}, "unable to connect");
124 };
163 125
164 $AnyEvent::MP::Base::NODE{$_} = $self 126 return unless @addresses;
165 for split /,/, $noderef;
166 127
167 $self->connect; 128 if ($self->{connect_w}) {
168 }); 129 # sometimes we get told about new addresses after we started to connect
130 unshift @{$self->{connect_addr}}, @addresses;
169 return; 131 return;
170 } 132 }
171 133
172 $self->{retry} ||= [split /,/, $self->{n_noderef}]; 134 $self->{connect_addr} = \@addresses; # a bit weird, but efficient
173 135
174 my $endpoint = shift @{ $self->{retry} }; 136 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]");
175 137
176 if (defined $endpoint) { 138 my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
139
140 $interval = ($monitor - $interval) / @addresses
141 if ($monitor - $interval) / @addresses < $interval;
142
143 $interval = 0.4 if $interval < 0.4;
144
145 my @endpoints;
146
147 $self->{connect_w} = AE::timer 0.050 * rand, $interval * (0.9 + 0.1 * rand), sub {
148 @endpoints = @addresses
149 unless @endpoints;
150
151 my $endpoint = shift @endpoints;
152
153 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint");
154
177 $self->{trial}{$endpoint} ||= do { 155 $self->{trial}{$endpoint} ||= do {
178 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint 156 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
179 or return; 157 or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");
180 158
181 my ($w, $g);
182
183 $w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub {
184 delete $self->{trial}{$endpoint};
185 };
186 $g = AnyEvent::MP::Transport::mp_connect 159 AnyEvent::MP::Transport::mp_connect
187 $host, $port, 160 $host, $port,
188 sub {
189 delete $self->{trial}{$endpoint} 161 sub { delete $self->{trial}{$endpoint} },
190 unless @_;
191 $g = shift;
192 };
193 ;
194
195 [$w, \$g]
196 }; 162 };
197 } else {
198 delete $self->{retry};
199 } 163 };
164}
200 165
201 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub { 166sub kill {
202 $self->connect; 167 my ($self, $port, @reason) = @_;
168
169 $self->send (["", kil => $port, @reason]);
170}
171
172sub monitor {
173 my ($self, $portid, $cb) = @_;
174
175 my $list = $self->{lmon}{$portid} ||= [];
176
177 $self->send (["", mon1 => $portid])
178 unless @$list || !length $portid;
179
180 push @$list, $cb;
181}
182
183sub unmonitor {
184 my ($self, $portid, $cb) = @_;
185
186 my $list = $self->{lmon}{$portid}
187 or return;
188
189 @$list = grep $_ != $cb, @$list;
190
191 unless (@$list) {
192 $self->send (["", mon0 => $portid]);
193 delete $self->{monitor}{$portid};
203 }; 194 }
204} 195}
196
197# used for direct slave connections as well
198package AnyEvent::MP::Node::Direct;
199
200use base "AnyEvent::MP::Node::External";
205 201
206package AnyEvent::MP::Node::Self; 202package AnyEvent::MP::Node::Self;
207 203
208use base "AnyEvent::MP::Node"; 204use base "AnyEvent::MP::Node";
209 205
206sub connect {
207 # we are trivially connected
208}
209
210# delay every so often to avoid recursion, also used to delay after spawn
211our $DELAY = -50;
212our @DELAY;
213our $DELAY_W;
214
215sub _send_delayed {
216 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE{""};
217 (shift @DELAY)->()
218 while @DELAY;
219 undef $DELAY_W;
220 $DELAY = -50;
221}
222
210sub set_transport { 223sub transport_reset {
211 die "FATAL error, set_transport was called"; 224 my ($self) = @_;
212}
213 225
214sub send { 226 Scalar::Util::weaken $self;
227
228 $self->{send} = sub {
229 if ($DELAY++ >= 0) {
230 my $msg = $_[0];
231 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
232 $DELAY_W ||= AE::timer 0, 0, \&_send_delayed;
233 return;
234 }
235
236 local $AnyEvent::MP::Kernel::SRCNODE = $self;
215 AnyEvent::MP::Base::_inject ($_[1]); 237 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
238 };
239}
240
241sub transport_connect {
242 my ($self, $tp) = @_;
243
244 $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})");
245}
246
247sub kill {
248 my (undef, @args) = @_;
249
250 # we _always_ delay kil's, to avoid calling mon callbacks
251 # from anything but the event loop context.
252 $DELAY = 1;
253 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
254 $DELAY_W ||= AE::timer 0, 0, \&_send_delayed;
255}
256
257sub monitor {
258 # maybe always delay, too?
259 if ($DELAY_W) {
260 my @args = @_;
261 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
262 return;
263 }
264 &AnyEvent::MP::Kernel::_monitor;
265}
266
267sub unmonitor {
268 # no need to always delay
269 if ($DELAY_W) {
270 my @args = @_;
271 push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) };
272 return;
273 }
274
275 &AnyEvent::MP::Kernel::_unmonitor;
216} 276}
217 277
218=head1 SEE ALSO 278=head1 SEE ALSO
219 279
220L<AnyEvent>. 280L<AnyEvent::MP>.
221 281
222=head1 AUTHOR 282=head1 AUTHOR
223 283
224 Marc Lehmann <schmorp@schmorp.de> 284 Marc Lehmann <schmorp@schmorp.de>
225 http://home.schmorp.de/ 285 http://home.schmorp.de/

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