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Comparing AnyEvent-MP/MP/Node.pm (file contents):
Revision 1.8 by root, Tue Aug 4 18:33:30 2009 UTC vs.
Revision 1.59 by root, Sat Mar 3 11:38:43 2012 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
11This is an internal utility module, horrible to look at, so don't.
10 12
11=cut 13=cut
12 14
13package AnyEvent::MP::Node; 15package AnyEvent::MP::Node;
14 16
… …
18use AnyEvent::Util (); 20use AnyEvent::Util ();
19use AnyEvent::Socket (); 21use AnyEvent::Socket ();
20 22
21use AnyEvent::MP::Transport (); 23use AnyEvent::MP::Transport ();
22 24
23use base Exporter::; 25sub new {
26 my ($self, $id) = @_;
24 27
25our $VERSION = '0.0'; 28 $self = bless { id => $id }, $self;
26 29
27our $DEFAULT_PORT = "4040"; 30 $self->init;
31 $self->transport_reset;
28 32
29sub normalise_noderef($) { 33 $self
34}
35
36sub init {
37 #
38}
39
40sub send {
41 &{ shift->{send} }
42}
43
44# nodes reachable via the network
45package AnyEvent::MP::Node::Remote;
46
47use base "AnyEvent::MP::Node";
48
49# called at init time, mostly sets {send}
50sub transport_reset {
30 my ($noderef) = @_; 51 my ($self) = @_;
31 52
32 my $cv = AE::cv; 53 delete $self->{transport};
33 my @res;
34 54
35 $cv->begin (sub { 55 Scalar::Util::weaken $self;
36 my %seen; 56
37 my @refs; 57 $self->{send} = sub {
38 for (sort { $a->[0] <=> $b->[0] } @res) { 58 push @{$self->{queue}}, shift;
39 push @refs, $_->[1] unless $seen{$_->[1]}++ 59 $self->connect;
60 };
61}
62
63# called each time we fail to establish a connection,
64# or the existing connection failed
65sub transport_error {
66 my ($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} || $self->{connect_to};
86}
87
88# called after handshake was successful
89sub transport_connect {
90 my ($self, $transport) = @_;
91
92 delete $self->{trial};
93
94 $self->transport_error (transport_error => $self->{id}, "switched connections")
95 if $self->{transport};
96
97 delete $self->{connect_w};
98 delete $self->{connect_to};
99
100 $self->{transport} = $transport;
101
102 my $transport_send = $transport->{send};
103
104 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
105
106 $self->{send} = $transport_send;
107
108 $transport_send->($_)
109 for @{ delete $self->{queue} || [] };
110}
111
112sub connect {
113 my ($self) = @_;
114
115 return if $self->{transport};
116 return if $self->{connect_w};
117
118 Scalar::Util::weaken $self;
119
120 $self->{connect_to} ||= AE::timer $AnyEvent::MP::Kernel::CONFIG->{connect_interval}, 0, sub {
121 $self->transport_error (transport_error => $self->{id}, "unable to connect");
122 };
123
124 # maybe @$addresses?
125 my $addresses = $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}};
126
127 if ($addresses) {
128 $self->connect_to ($addresses);
129 } else {
130 # on global nodes, all bets are off now - we either know the node, or we don't
131 unless ($AnyEvent::MP::Kernel::GLOBAL) {
132 AnyEvent::MP::Kernel::g_find ($self->{id});
40 } 133 }
41 shift->send (join ",", @refs); 134 }
135}
136
137sub connect_to {
138 my ($self, $addresses) = @_;
139
140 return if $self->{transport};
141 return if $self->{connect_w};
142
143 return unless @$addresses;
144
145 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@$addresses]");
146
147 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
148 my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
149
150 $interval = ($monitor - $interval) / @$addresses
151 if ($monitor - $interval) / @$addresses < $interval;
152
153 $interval = 0.4 if $interval < 0.4;
154
155 my @endpoints = reverse @$addresses;
156
157 $self->{connect_w} = AE::timer 0, $interval * (0.9 + 0.1 * rand), sub {
158 my $endpoint = pop @endpoints;
159
160 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint");
161
162 $self->{trial}{$endpoint} ||= do {
163 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
164 or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");
165
166 AnyEvent::MP::Transport::mp_connect
167 $host, $port,
168 sub { delete $self->{trial}{$endpoint} },
169 };
42 }); 170 };
171}
43 172
44 $noderef = $DEFAULT_PORT unless length $noderef; 173sub connect {
174 my ($self) = @_;
45 175
46 my $idx; 176 return if $self->{transport};
47 for my $t (split /,/, $noderef) { 177 return if $self->{connect_w};
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];
54 178
55 $cv->begin; 179 Scalar::Util::weaken $self;
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 };
66 180
67# my (undef, undef, undef, undef, @ipv4) = gethostbyname $nodename; 181 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
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";
78 182
79 $cv->begin; 183 $self->{connect_to} ||= AE::timer $monitor, 0, sub {
80 AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub { 184 $self->transport_error (transport_error => $self->{id}, "unable to connect");
81 for (@_) { 185 };
82 my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3]; 186
83 push @res, [ 187 # maybe @$addresses?
84 $pri += 1e-5, 188 my @addresses = @{ $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}} };
85 AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service 189
86 ]; 190 unless (@addresses) {
87 } 191 # on global nodes, all bets are off now - we either know the node, or we don't
88 $cv->end; 192 unless ($AnyEvent::MP::Kernel::GLOBAL) {
89 } 193 AnyEvent::MP::Kernel::g_find ($self->{id});
90 } 194 }
195 return;
196 }
197
198 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]");
199
200 my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
201
202 $interval = ($monitor - $interval) / @addresses
203 if ($monitor - $interval) / @addresses < $interval;
204
205 $interval = 0.4 if $interval < 0.4;
206
207 my @endpoints;
208
209 $self->{connect_w} = AE::timer 0, $interval * (0.9 + 0.1 * rand), sub {
210 @endpoints = @addresses
211 unless @endpoints;
212
213 my $endpoint = shift @endpoints;
214
215 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint");
216
217 $self->{trial}{$endpoint} ||= do {
218 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
219 or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");
220
221 AnyEvent::MP::Transport::mp_connect
222 $host, $port,
223 sub { delete $self->{trial}{$endpoint} },
224 };
91 } 225 };
92
93 $cv->end;
94
95 $cv
96}
97
98sub new {
99 my ($class, $noderef) = @_;
100
101 bless { noderef => $noderef }, $class
102}
103
104package AnyEvent::MP::Node::Direct;
105
106use base "AnyEvent::MP::Node";
107
108sub send {
109 my ($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 $self->connect;
118 }
119} 226}
120 227
121sub kill { 228sub kill {
122 my ($self, $port, @reason) = @_; 229 my ($self, $port, @reason) = @_;
123 230
124 $self->send (["", kil => $port, @reason]); 231 $self->{send} (["", kil => $port, @reason]);
125} 232}
126 233
127sub monitor { 234sub monitor {
128 my ($self, $portid, $cb) = @_; 235 my ($self, $portid, $cb) = @_;
129 236
130 return $cb->("node failed conenction")
131 if $self->{failed};
132
133 my $list = $self->{lmon}{$portid} ||= []; 237 my $list = $self->{lmon}{$portid} ||= [];
134 238
135 $self->send (["", mon1 => $portid]) 239 $self->send (["", mon1 => $portid])
136 unless @$list; 240 unless @$list || !length $portid;
137 241
138 push @$list, $cb; 242 push @$list, $cb;
139} 243}
140 244
141sub unmonitor { 245sub unmonitor {
… …
150 $self->send (["", mon0 => $portid]); 254 $self->send (["", mon0 => $portid]);
151 delete $self->{monitor}{$portid}; 255 delete $self->{monitor}{$portid};
152 } 256 }
153} 257}
154 258
155sub set_transport { 259package AnyEvent::MP::Node::Self;
156 my ($self, $transport) = @_;
157 260
158 $self->clr_transport 261use base "AnyEvent::MP::Node";
159 if $self->{transport};
160
161 if (
162 exists $self->{remote_uniq}
163 && $self->{remote_uniq} ne $transport->{remote_uniq}
164 ) {
165 # uniq changed, different node
166 $self->fail ("node restart detected");
167 }
168
169 delete $self->{trial};
170 delete $self->{next_connect};
171 delete $self->{failed};
172
173 $self->{remote_uniq} = $transport->{remote_uniq};
174 $self->{transport} = $transport;
175
176 $transport->send ($_)
177 for @{ delete $self->{queue} || [] };
178}
179
180sub fail {
181 my ($self, @reason) = @_;
182
183 delete $self->{queue};
184
185 $self->{failed} = 1;
186
187 if (my $mon = delete $self->{lmon}) {
188 $_->(@reason) for map @$_, values %$mon;
189 }
190}
191
192sub clr_transport {
193 my ($self, @reason) = @_;
194
195 delete $self->{transport};
196 $self->connect;
197}
198 262
199sub connect { 263sub connect {
264 # we are trivially connected
265}
266
267# delay every so often to avoid recursion, also used to delay after spawn
268our $DELAY = -50;
269our @DELAY;
270our $DELAY_W;
271
272sub _send_delayed {
273 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE{""};
274 (shift @DELAY)->()
275 while @DELAY;
276 undef $DELAY_W;
277 $DELAY = -50;
278}
279
280sub transport_reset {
200 my ($self) = @_; 281 my ($self) = @_;
201 282
202 Scalar::Util::weaken $self; 283 Scalar::Util::weaken $self;
203 284
204 unless (exists $self->{n_noderef}) { 285 $self->{send} = sub {
205 return if $self->{n_noderef_}++; 286 if ($DELAY++ >= 0) {
206 (AnyEvent::MP::Node::normalise_noderef ($self->{noderef}))->cb (sub { 287 my $msg = $_[0];
288 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
289 $DELAY_W ||= AE::timer 0, 0, \&_send_delayed;
207 $self or return; 290 return;
208 delete $self->{n_noderef_};
209 my $noderef = shift->recv;
210
211 $self->{n_noderef} = $noderef;
212
213 $AnyEvent::MP::Base::NODE{$_} = $self
214 for split /,/, $noderef;
215
216 $self->connect;
217 }); 291 }
292
293 local $AnyEvent::MP::Kernel::SRCNODE = $self;
294 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
295 };
296}
297
298sub transport_connect {
299 my ($self, $tp) = @_;
300
301 $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})");
302}
303
304sub kill {
305 my (undef, @args) = @_;
306
307 # we _always_ delay kil's, to avoid calling mon callbacks
308 # from anything but the event loop context.
309 $DELAY = 1;
310 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
311 $DELAY_W ||= AE::timer 0, 0, \&_send_delayed;
312}
313
314sub monitor {
315 # maybe always delay, too?
316 if ($DELAY_W) {
317 my @args = @_;
318 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
218 return; 319 return;
219 } 320 }
220 321 &AnyEvent::MP::Kernel::_monitor;
221 $self->{retry} ||= [split /,/, $self->{n_noderef}];
222
223 my $endpoint = shift @{ $self->{retry} };
224
225 if (defined $endpoint) {
226 $self->{trial}{$endpoint} ||= do {
227 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
228 or return;
229
230 my ($w, $g);
231
232 $w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub {
233 delete $self->{trial}{$endpoint};
234 };
235 $g = AnyEvent::MP::Transport::mp_connect
236 $host, $port,
237 sub {
238 delete $self->{trial}{$endpoint}
239 unless @_;
240 $g = shift;
241 };
242 ;
243
244 [$w, \$g]
245 };
246 } else {
247 delete $self->{retry};
248 }
249
250 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
251 $self->connect;
252 };
253}
254
255package AnyEvent::MP::Node::Self;
256
257use base "AnyEvent::MP::Node";
258
259sub set_transport {
260 die "FATAL error, set_transport was called";
261}
262
263sub send {
264 local $AnyEvent::MP::Base::SRCNODE = $_[0];
265 AnyEvent::MP::Base::_inject (@{ $_[1] });
266}
267
268sub kill {
269 my ($self, $port, @reason) = @_;
270
271 delete $AnyEvent::MP::Base::PORT{$port};
272 delete $AnyEvent::MP::Base::PORT_DATA{$port};
273
274 my $mon = delete $AnyEvent::MP::Base::LMON{$port}
275 or !@reason
276 or $AnyEvent::MP::Base::WARN->("unmonitored local port $port died with reason: @reason");
277
278 $_->(@reason) for values %$mon;
279}
280
281sub monitor {
282 my ($self, $portid, $cb) = @_;
283
284 return $cb->()
285 unless exists $AnyEvent::MP::Base::PORT{$portid};
286
287 $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb;
288} 322}
289 323
290sub unmonitor { 324sub unmonitor {
291 my ($self, $portid, $cb) = @_; 325 # no need to always delay
326 if ($DELAY_W) {
327 my @args = @_;
328 push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) };
329 return;
330 }
292 331
293 delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0}; 332 &AnyEvent::MP::Kernel::_unmonitor;
294} 333}
295 334
296=head1 SEE ALSO 335=head1 SEE ALSO
297 336
298L<AnyEvent>. 337L<AnyEvent::MP>.
299 338
300=head1 AUTHOR 339=head1 AUTHOR
301 340
302 Marc Lehmann <schmorp@schmorp.de> 341 Marc Lehmann <schmorp@schmorp.de>
303 http://home.schmorp.de/ 342 http://home.schmorp.de/

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