ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/AnyEvent-MP/MP/Node.pm
(Generate patch)

Comparing AnyEvent-MP/MP/Node.pm (file contents):
Revision 1.8 by root, Tue Aug 4 18:33:30 2009 UTC vs.
Revision 1.47 by root, Sat Nov 28 12:40:22 2009 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 $self
34}
35
36sub init {
37 #
38}
39
40sub send {
41 &{ shift->{send} }
42}
43
44# nodes reachable via the network
45package AnyEvent::MP::Node::External;
46
47use base "AnyEvent::MP::Node";
48
49# called at init time, mostly sets {send}
50sub transport_reset {
30 my ($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;
40 }
41 shift->send (join ",", @refs);
42 }); 60 };
61}
43 62
44 $noderef = $DEFAULT_PORT unless length $noderef; 63# called each time we fail to establish a connection,
64# or the existing connection failed
65sub transport_error {
66 my ($self, @reason) = @_;
45 67
46 my $idx; 68 my $no_transport = !$self->{transport};
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 69
55 $cv->begin; 70 delete $self->{connect_w};
56 AnyEvent::Socket::resolve_sockaddr $nodename, $t || "aemp=$DEFAULT_PORT", "tcp", 0, undef, sub { 71 delete $self->{connect_to};
57 for (@_) {
58 my ($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 72
67# my (undef, undef, undef, undef, @ipv4) = gethostbyname $nodename; 73 delete $self->{queue};
68# 74 $self->transport_reset;
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 75
79 $cv->begin; 76 if (my $mon = delete $self->{lmon}) {
80 AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub { 77 $_->(@reason) for map @$_, values %$mon;
81 for (@_) {
82 my ($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 } 78 }
92 79
93 $cv->end; 80 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
81 unless $no_transport;
94 82
95 $cv 83 # if we are here and are idle, we nuke ourselves
84 delete $AnyEvent::MP::Kernel::NODE{$self->{id}}
85 unless $self->{transport} || $self->{connect_to};
96} 86}
97 87
98sub new { 88# called after handshake was successful
99 my ($class, $noderef) = @_; 89sub transport_connect {
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, $msg) = @_; 90 my ($self, $transport) = @_;
110 91
92 delete $self->{trial};
93
94 $self->transport_error (transport_error => "switched connections")
111 if ($self->{transport}) { 95 if $self->{transport};
112 $self->{transport}->send ($msg); 96
113 } elsif ($self->{queue}) { 97 delete $self->{connect_addr};
114 push @{ $self->{queue} }, $msg;
115 } else {
116 $self->{queue} = [$msg];
117 $self->connect; 98 delete $self->{connect_w};
99 delete $self->{connect_to};
100
101 $self->{transport} = $transport;
102
103 my $transport_send = $transport->can ("send");
104
105 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
106
107 $self->{send} = sub {
108 $transport_send->($transport, $_[0]);
109 };
110
111 $transport->send ($_)
112 for @{ delete $self->{queue} || [] };
113}
114
115sub connect {
116 my ($self, @addresses) = @_;
117
118 return if $self->{transport};
119
120 Scalar::Util::weaken $self;
121
122 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
123
124 $self->{connect_to} ||= AE::timer $monitor, 0, sub {
125 $self->transport_error (transport_error => $self->{id}, "unable to connect");
126 };
127
128 return unless @addresses;
129
130 if ($self->{connect_w}) {
131 # sometimes we get told about new addresses after we started to connect
132 unshift @{$self->{connect_addr}}, @addresses;
133 return;
118 } 134 }
135
136 $self->{connect_addr} = \@addresses; # a bit weird, but efficient
137
138 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]");
139
140 my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
141
142 $interval = ($monitor - $interval) / @addresses
143 if ($monitor - $interval) / @addresses < $interval;
144
145 $interval = 0.4 if $interval < 0.4;
146
147 my @endpoints;
148
149 $self->{connect_w} = AE::timer 0.050 * rand, $interval * (0.9 + 0.1 * rand), sub {
150 @endpoints = @addresses
151 unless @endpoints;
152
153 my $endpoint = shift @endpoints;
154
155 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint");
156
157 $self->{trial}{$endpoint} ||= do {
158 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
159 or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");
160
161 AnyEvent::MP::Transport::mp_connect
162 $host, $port,
163 sub { delete $self->{trial}{$endpoint} },
164 };
165 };
119} 166}
120 167
121sub kill { 168sub kill {
122 my ($self, $port, @reason) = @_; 169 my ($self, $port, @reason) = @_;
123 170
… …
125} 172}
126 173
127sub monitor { 174sub monitor {
128 my ($self, $portid, $cb) = @_; 175 my ($self, $portid, $cb) = @_;
129 176
130 return $cb->("node failed conenction")
131 if $self->{failed};
132
133 my $list = $self->{lmon}{$portid} ||= []; 177 my $list = $self->{lmon}{$portid} ||= [];
134 178
135 $self->send (["", mon1 => $portid]) 179 $self->send (["", mon1 => $portid])
136 unless @$list; 180 unless @$list || !length $portid;
137 181
138 push @$list, $cb; 182 push @$list, $cb;
139} 183}
140 184
141sub unmonitor { 185sub unmonitor {
… …
150 $self->send (["", mon0 => $portid]); 194 $self->send (["", mon0 => $portid]);
151 delete $self->{monitor}{$portid}; 195 delete $self->{monitor}{$portid};
152 } 196 }
153} 197}
154 198
155sub set_transport { 199# used for direct slave connections as well
156 my ($self, $transport) = @_; 200package AnyEvent::MP::Node::Direct;
157 201
158 $self->clr_transport 202use base "AnyEvent::MP::Node::External";
159 if $self->{transport};
160 203
161 if ( 204package AnyEvent::MP::Node::Self;
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 }
168 205
169 delete $self->{trial}; 206use base "AnyEvent::MP::Node";
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}
198 207
199sub connect { 208sub connect {
209 # we are trivially connected
210}
211
212# delay every so often to avoid recursion, also used to delay after spawn
213our $DELAY = -50;
214our @DELAY;
215our $DELAY_W;
216
217sub _send_delayed {
218 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE{""};
219 (shift @DELAY)->()
220 while @DELAY;
221 undef $DELAY_W;
222 $DELAY = -50;
223}
224
225sub transport_reset {
200 my ($self) = @_; 226 my ($self) = @_;
201 227
202 Scalar::Util::weaken $self; 228 Scalar::Util::weaken $self;
203 229
204 unless (exists $self->{n_noderef}) { 230 $self->{send} = sub {
205 return if $self->{n_noderef_}++; 231 if ($DELAY++ >= 0) {
206 (AnyEvent::MP::Node::normalise_noderef ($self->{noderef}))->cb (sub { 232 my $msg = $_[0];
207 $self or return; 233 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
208 delete $self->{n_noderef_}; 234 $DELAY_W ||= AE::timer 0, 0, \&_send_delayed;
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 });
218 return; 235 return;
219 }
220
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 }; 236 }
246 } else { 237
247 delete $self->{retry}; 238 local $AnyEvent::MP::Kernel::SRCNODE = $self;
239 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
248 } 240 };
249
250 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
251 $self->connect;
252 };
253} 241}
254 242
255package AnyEvent::MP::Node::Self; 243sub transport_connect {
244 my ($self, $tp) = @_;
256 245
257use base "AnyEvent::MP::Node"; 246 $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})");
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 (@{ $_[1] });
266} 247}
267 248
268sub kill { 249sub kill {
269 my ($self, $port, @reason) = @_; 250 my ($self, $port, @reason) = @_;
270 251
252 my $delay_cb = sub {
271 delete $AnyEvent::MP::Base::PORT{$port}; 253 delete $AnyEvent::MP::Kernel::PORT{$port}
254 or return; # killing nonexistent ports is O.K.
272 delete $AnyEvent::MP::Base::PORT_DATA{$port}; 255 delete $AnyEvent::MP::Kernel::PORT_DATA{$port};
273 256
274 my $mon = delete $AnyEvent::MP::Base::LMON{$port} 257 my $mon = delete $AnyEvent::MP::Kernel::LMON{$port}
275 or !@reason 258 or !@reason
276 or $AnyEvent::MP::Base::WARN->("unmonitored local port $port died with reason: @reason"); 259 or $AnyEvent::MP::Kernel::WARN->(2, "unmonitored local port $port died with reason: @reason");
277 260
278 $_->(@reason) for values %$mon; 261 $_->(@reason) for values %$mon;
262 };
263
264 # we _always_ delay kil's, to avoid calling mon callbacks
265 # from anything but the event loop context.
266 $DELAY = 1;
267 push @DELAY, $delay_cb;
268 $DELAY_W ||= AE::timer 0, 0, \&_send_delayed;
279} 269}
280 270
281sub monitor { 271sub monitor {
282 my ($self, $portid, $cb) = @_; 272 my ($self, $portid, $cb) = @_;
283 273
284 return $cb->() 274 my $delay_cb = sub {
275 return $cb->(no_such_port => "cannot monitor nonexistent port", "$self->{id}#$portid")
285 unless exists $AnyEvent::MP::Base::PORT{$portid}; 276 unless exists $AnyEvent::MP::Kernel::PORT{$portid};
286 277
287 $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb; 278 $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb;
279 };
280
281 $DELAY_W ? push @DELAY, $delay_cb : &$delay_cb;
288} 282}
289 283
290sub unmonitor { 284sub unmonitor {
291 my ($self, $portid, $cb) = @_; 285 my ($self, $portid, $cb) = @_;
292 286
287 my $delay_cb = sub {
293 delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0}; 288 delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0};
289 };
290
291 $DELAY_W ? push @DELAY, $delay_cb : &$delay_cb;
294} 292}
295 293
296=head1 SEE ALSO 294=head1 SEE ALSO
297 295
298L<AnyEvent>. 296L<AnyEvent::MP>.
299 297
300=head1 AUTHOR 298=head1 AUTHOR
301 299
302 Marc Lehmann <schmorp@schmorp.de> 300 Marc Lehmann <schmorp@schmorp.de>
303 http://home.schmorp.de/ 301 http://home.schmorp.de/

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines