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Comparing AnyEvent-MP/MP/Node.pm (file contents):
Revision 1.16 by root, Sun Aug 9 16:08:16 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::;
24
25sub new { 25sub new {
26 my ($class, $noderef) = @_; 26 my ($self, $id) = @_;
27 27
28 bless { noderef => $noderef }, $class 28 $self = bless { id => $id }, $self;
29}
30 29
30 $self->init;
31 $self->transport_reset;
32
33 $self
34}
35
36sub init {
37 #
38}
39
40sub send {
41 &{ shift->{send} }
42}
43
44# nodes reachable via the network
31package AnyEvent::MP::Node::Direct; 45package AnyEvent::MP::Node::Remote;
32 46
33use base "AnyEvent::MP::Node"; 47use base "AnyEvent::MP::Node";
34 48
35sub send { 49# called at init time, mostly sets {send}
50sub transport_reset {
36 my ($self, $msg) = @_; 51 my ($self) = @_;
37 52
38 if ($self->{transport}) { 53 delete $self->{transport};
39 $self->{transport}->send ($msg); 54
40 } elsif ($self->{queue}) { 55 Scalar::Util::weaken $self;
56
57 $self->{send} = sub {
41 push @{ $self->{queue} }, $msg; 58 push @{$self->{queue}}, shift;
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);
42 } else { 129 } else {
43 $self->{queue} = [$msg]; 130 # on global nodes, all bets are off now - we either know the node, or we don't
44 $self->connect; 131 unless ($AnyEvent::MP::Kernel::GLOBAL) {
132 AnyEvent::MP::Kernel::g_find ($self->{id});
133 }
134 }
135}
136
137sub connect_to {
138 my ($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 };
45 } 170 };
171}
172
173sub connect {
174 my ($self) = @_;
175
176 return if $self->{transport};
177 return if $self->{connect_w};
178
179 Scalar::Util::weaken $self;
180
181 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
182
183 $self->{connect_to} ||= AE::timer $monitor, 0, sub {
184 $self->transport_error (transport_error => $self->{id}, "unable to connect");
185 };
186
187 # maybe @$addresses?
188 my @addresses = @{ $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}} };
189
190 unless (@addresses) {
191 # on global nodes, all bets are off now - we either know the node, or we don't
192 unless ($AnyEvent::MP::Kernel::GLOBAL) {
193 AnyEvent::MP::Kernel::g_find ($self->{id});
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 };
225 };
46} 226}
47 227
48sub kill { 228sub kill {
49 my ($self, $port, @reason) = @_; 229 my ($self, $port, @reason) = @_;
50 230
51 $self->send (["", kil => $port, @reason]); 231 $self->{send} (["", kil => $port, @reason]);
52} 232}
53 233
54sub monitor { 234sub monitor {
55 my ($self, $portid, $cb) = @_; 235 my ($self, $portid, $cb) = @_;
56 236
57 my $list = $self->{lmon}{$portid} ||= []; 237 my $list = $self->{lmon}{$portid} ||= [];
58 238
59 $self->send (["", mon1 => $portid]) 239 $self->send (["", mon1 => $portid])
60 unless @$list; 240 unless @$list || !length $portid;
61 241
62 push @$list, $cb; 242 push @$list, $cb;
63} 243}
64 244
65sub unmonitor { 245sub unmonitor {
… …
74 $self->send (["", mon0 => $portid]); 254 $self->send (["", mon0 => $portid]);
75 delete $self->{monitor}{$portid}; 255 delete $self->{monitor}{$portid};
76 } 256 }
77} 257}
78 258
79sub set_transport { 259package AnyEvent::MP::Node::Self;
80 my ($self, $transport) = @_;
81 260
82 $self->clr_transport 261use base "AnyEvent::MP::Node";
83 if $self->{transport};
84
85 delete $self->{trial};
86 delete $self->{retry};
87 delete $self->{next_connect};
88
89 $self->{transport} = $transport;
90
91 $transport->send ($_)
92 for @{ delete $self->{queue} || [] };
93}
94
95sub fail {
96 my ($self, @reason) = @_;
97
98 delete $self->{queue};
99
100 if (my $mon = delete $self->{lmon}) {
101 $_->(@reason) for map @$_, values %$mon;
102 }
103}
104
105sub clr_transport {
106 my ($self, @reason) = @_;
107
108 delete $self->{transport};
109 $self->connect;
110}
111 262
112sub 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 $DELAY = -50;
278}
279
280sub transport_reset {
113 my ($self) = @_; 281 my ($self) = @_;
114 282
115 Scalar::Util::weaken $self; 283 Scalar::Util::weaken $self;
116 284
117 $self->{retry} ||= [split /,/, $self->{noderef}]; 285 $self->{send} = sub {
118 286 if ($DELAY++ >= 0) {
119 my $endpoint = shift @{ $self->{retry} }; 287 my $msg = $_[0];
120 288 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
121 if (defined $endpoint) { 289 $DELAY_W ||= AE::timer 0, 0, \&_send_delayed;
122 $self->{trial}{$endpoint} ||= do {
123 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
124 or return $AnyEvent::MP::Base::WARN->("$self->{noderef}: not a resolved node reference.");
125
126 my ($w, $g);
127
128 $w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub {
129 delete $self->{trial}{$endpoint};
130 };
131 $g = AnyEvent::MP::Transport::mp_connect
132 $host, $port,
133 sub {
134 delete $self->{trial}{$endpoint}
135 unless @_;
136 $g = shift;
137 };
138 ; 290 return;
139
140 [$w, \$g]
141 }; 291 }
142 } else { 292
143 $self->fail (transport_error => $self->{noderef}, "unable to connect"); 293 local $AnyEvent::MP::Kernel::SRCNODE = $self;
294 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
144 } 295 };
145
146 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
147 delete $self->{retry};
148 $self->connect;
149 };
150} 296}
151 297
152package AnyEvent::MP::Node::Slave; 298sub transport_connect {
153
154use base "AnyEvent::MP::Node::Direct";
155
156sub connect {
157 my ($self) = @_; 299 my ($self, $tp) = @_;
158 300
159 $self->fail (transport_error => $self->{noderef}, "unable to connect to slave node"); 301 $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})");
160}
161
162package AnyEvent::MP::Node::Self;
163
164use base "AnyEvent::MP::Node";
165
166sub set_transport {
167 Carp::confess "FATAL error, set_transport was called on local node";
168}
169
170sub send {
171 local $AnyEvent::MP::Base::SRCNODE = $_[0];
172 AnyEvent::MP::Base::_inject (@{ $_[1] });
173} 302}
174 303
175sub kill { 304sub kill {
176 my ($self, $port, @reason) = @_; 305 my (undef, @args) = @_;
177 306
178 delete $AnyEvent::MP::Base::PORT{$port}; 307 # we _always_ delay kil's, to avoid calling mon callbacks
179 delete $AnyEvent::MP::Base::PORT_DATA{$port}; 308 # from anything but the event loop context.
180 309 $DELAY = 1;
181 my $mon = delete $AnyEvent::MP::Base::LMON{$port} 310 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
182 or !@reason 311 $DELAY_W ||= AE::timer 0, 0, \&_send_delayed;
183 or $AnyEvent::MP::Base::WARN->("unmonitored local port $port died with reason: @reason");
184
185 $_->(@reason) for values %$mon;
186} 312}
187 313
188sub monitor { 314sub monitor {
189 my ($self, $portid, $cb) = @_; 315 # maybe always delay, too?
190 316 if ($DELAY_W) {
191 return $cb->(no_such_port => "cannot monitor nonexistent port") 317 my @args = @_;
192 unless exists $AnyEvent::MP::Base::PORT{$portid}; 318 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
193 319 return;
194 $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb; 320 }
321 &AnyEvent::MP::Kernel::_monitor;
195} 322}
196 323
197sub unmonitor { 324sub unmonitor {
198 my ($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 }
199 331
200 delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0}; 332 &AnyEvent::MP::Kernel::_unmonitor;
201} 333}
202 334
203=head1 SEE ALSO 335=head1 SEE ALSO
204 336
205L<AnyEvent>. 337L<AnyEvent::MP>.
206 338
207=head1 AUTHOR 339=head1 AUTHOR
208 340
209 Marc Lehmann <schmorp@schmorp.de> 341 Marc Lehmann <schmorp@schmorp.de>
210 http://home.schmorp.de/ 342 http://home.schmorp.de/

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