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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 1.40 by root, Tue Sep 8 20:56:05 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}) {
114 push @{ $self->{queue} }, $msg;
115 } else {
116 $self->{queue} = [$msg];
117 $self->connect; 97 delete $self->{connect_w};
98 delete $self->{connect_to};
99
100 $self->{transport} = $transport;
101
102 my $transport_send = $transport->can ("send");
103
104 $self->{send} = sub {
105 $transport_send->($transport, $_[0]);
118 } 106 };
107
108 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
109
110 $transport->send ($_)
111 for @{ delete $self->{queue} || [] };
112}
113
114sub connect {
115 my ($self, @addresses) = @_;
116
117 return if $self->{transport};
118
119 Scalar::Util::weaken $self;
120
121 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
122
123 $self->{connect_to} ||= AE::timer $monitor, 0, sub {
124 $self->transport_error (transport_error => $self->{id}, "unable to connect");
125 };
126
127 return unless @addresses;
128 return if $self->{connect_w};
129
130 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]");
131
132 my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
133
134 $interval = ($monitor - $interval) / @addresses
135 if ($monitor - $interval) / @addresses < $interval;
136
137 $interval = 0.4 if $interval < 0.4;
138
139 my @endpoints;
140
141 $self->{connect_w} = AE::timer 0.050 * rand, $interval * (0.9 + 0.1 * rand), sub {
142 @endpoints = @addresses
143 unless @endpoints;
144
145 my $endpoint = shift @endpoints;
146
147 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint");
148
149 $self->{trial}{$endpoint} ||= do {
150 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
151 or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");
152
153 AnyEvent::MP::Transport::mp_connect
154 $host, $port,
155 sub { delete $self->{trial}{$endpoint} },
156 };
157 };
119} 158}
120 159
121sub kill { 160sub kill {
122 my ($self, $port, @reason) = @_; 161 my ($self, $port, @reason) = @_;
123 162
… …
125} 164}
126 165
127sub monitor { 166sub monitor {
128 my ($self, $portid, $cb) = @_; 167 my ($self, $portid, $cb) = @_;
129 168
130 return $cb->("node failed conenction")
131 if $self->{failed};
132
133 my $list = $self->{lmon}{$portid} ||= []; 169 my $list = $self->{lmon}{$portid} ||= [];
134 170
135 $self->send (["", mon1 => $portid]) 171 $self->send (["", mon1 => $portid])
136 unless @$list; 172 unless @$list || !length $portid;
137 173
138 push @$list, $cb; 174 push @$list, $cb;
139} 175}
140 176
141sub unmonitor { 177sub unmonitor {
… …
150 $self->send (["", mon0 => $portid]); 186 $self->send (["", mon0 => $portid]);
151 delete $self->{monitor}{$portid}; 187 delete $self->{monitor}{$portid};
152 } 188 }
153} 189}
154 190
155sub set_transport { 191# used for direct slave connections as well
156 my ($self, $transport) = @_; 192package AnyEvent::MP::Node::Direct;
157 193
158 $self->clr_transport 194use base "AnyEvent::MP::Node::External";
159 if $self->{transport};
160 195
161 if ( 196package 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 }
168 197
169 delete $self->{trial}; 198use 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}
198 199
199sub connect { 200sub connect {
201 # we are trivially connected
202}
203
204# delay every so often to avoid recursion, also used to delay after spawn
205our $DELAY;
206our @DELAY;
207our $DELAY_W;
208
209sub _send_delayed {
210 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE{""};
211 (shift @DELAY)->()
212 while @DELAY;
213 undef $DELAY_W;
214 $DELAY = -50;
215}
216
217sub transport_reset {
200 my ($self) = @_; 218 my ($self) = @_;
201 219
202 Scalar::Util::weaken $self; 220 Scalar::Util::weaken $self;
203 221
204 unless (exists $self->{n_noderef}) { 222 $self->{send} = sub {
205 return if $self->{n_noderef_}++; 223 if ($DELAY++ >= 0) {
206 (AnyEvent::MP::Node::normalise_noderef ($self->{noderef}))->cb (sub { 224 my $msg = $_[0];
207 $self or return; 225 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
208 delete $self->{n_noderef_}; 226 $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; 227 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 }; 228 }
246 } else { 229
247 delete $self->{retry}; 230 local $AnyEvent::MP::Kernel::SRCNODE = $self;
231 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
248 } 232 };
249
250 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
251 $self->connect;
252 };
253} 233}
254 234
255package AnyEvent::MP::Node::Self; 235sub transport_connect {
236 my ($self, $tp) = @_;
256 237
257use base "AnyEvent::MP::Node"; 238 $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($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 (@{ $_[1] });
266} 239}
267 240
268sub kill { 241sub kill {
269 my ($self, $port, @reason) = @_; 242 my ($self, $port, @reason) = @_;
270 243
244 my $delay_cb = sub {
271 delete $AnyEvent::MP::Base::PORT{$port}; 245 delete $AnyEvent::MP::Kernel::PORT{$port};
272 delete $AnyEvent::MP::Base::PORT_DATA{$port}; 246 delete $AnyEvent::MP::Kernel::PORT_DATA{$port};
273 247
274 my $mon = delete $AnyEvent::MP::Base::LMON{$port} 248 my $mon = delete $AnyEvent::MP::Kernel::LMON{$port}
275 or !@reason 249 or !@reason
276 or $AnyEvent::MP::Base::WARN->("unmonitored local port $port died with reason: @reason"); 250 or $AnyEvent::MP::Kernel::WARN->(8, "unmonitored local port $port died with reason: @reason");
277 251
278 $_->(@reason) for values %$mon; 252 $_->(@reason) for values %$mon;
253 };
254
255 $DELAY_W ? push @DELAY, $delay_cb : &$delay_cb;
279} 256}
280 257
281sub monitor { 258sub monitor {
282 my ($self, $portid, $cb) = @_; 259 my ($self, $portid, $cb) = @_;
283 260
284 return $cb->() 261 my $delay_cb = sub {
262 return $cb->(no_such_port => "cannot monitor nonexistent port", "$self->{id}#$portid")
285 unless exists $AnyEvent::MP::Base::PORT{$portid}; 263 unless exists $AnyEvent::MP::Kernel::PORT{$portid};
286 264
287 $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb; 265 $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb;
266 };
267
268 $DELAY_W ? push @DELAY, $delay_cb : &$delay_cb;
288} 269}
289 270
290sub unmonitor { 271sub unmonitor {
291 my ($self, $portid, $cb) = @_; 272 my ($self, $portid, $cb) = @_;
292 273
274 my $delay_cb = sub {
293 delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0}; 275 delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0};
276 };
277
278 $DELAY_W ? push @DELAY, $delay_cb : &$delay_cb;
294} 279}
295 280
296=head1 SEE ALSO 281=head1 SEE ALSO
297 282
298L<AnyEvent>. 283L<AnyEvent::MP>.
299 284
300=head1 AUTHOR 285=head1 AUTHOR
301 286
302 Marc Lehmann <schmorp@schmorp.de> 287 Marc Lehmann <schmorp@schmorp.de>
303 http://home.schmorp.de/ 288 http://home.schmorp.de/

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