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Comparing AnyEvent-MP/MP/Node.pm (file contents):
Revision 1.14 by root, Sat Aug 8 00:22:16 2009 UTC vs.
Revision 1.55 by root, Wed Feb 29 19:23:44 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
25our $VERSION = '0.0';
26
27sub new { 25sub new {
28 my ($class, $noderef) = @_; 26 my ($self, $id) = @_;
29 27
30 bless { noderef => $noderef }, $class 28 $self = bless { id => $id }, $self;
31}
32 29
30 $self->init;
31 $self->transport_reset;
32
33 $self
34}
35
36sub init {
37 #
38}
39
40sub send {
41 &{ shift->{send} }
42}
43
44# nodes reachable via the network
33package AnyEvent::MP::Node::Direct; 45package AnyEvent::MP::Node::Remote;
34 46
35use base "AnyEvent::MP::Node"; 47use base "AnyEvent::MP::Node";
36 48
37sub send { 49# called at init time, mostly sets {send}
50sub transport_reset {
38 my ($self, $msg) = @_; 51 my ($self) = @_;
39 52
40 if ($self->{transport}) { 53 delete $self->{transport};
41 $self->{transport}->send ($msg); 54
42 } elsif ($self->{queue}) { 55 Scalar::Util::weaken $self;
56
57 $self->{send} = sub {
43 push @{ $self->{queue} }, $msg; 58 push @{$self->{queue}}, shift;
44 } else {
45 $self->{queue} = [$msg];
46 $self->connect; 59 $self->connect;
47 } 60 };
61}
62
63# called each time we fail to establish a connection,
64# or the existing connection failed
65sub transport_error {
66 my ($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_addr};
98 delete $self->{connect_w};
99 delete $self->{connect_to};
100
101 $self->{transport} = $transport;
102
103 my $transport_send = $transport->{send};
104
105 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
106
107 $self->{send} = $transport_send;
108
109 $transport_send->($_)
110 for @{ delete $self->{queue} || [] };
111}
112
113sub connect {
114 my ($self) = @_;
115
116 return if $self->{transport};
117 return if $self->{connect_w};
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 => $self->{id}, "unable to connect");
125 };
126
127 # maybe @$addresses?
128 my @addresses = @{
129 $AnyEvent::MP::Kernel::GLOBAL_ADDR->{$self->{id}}
130 || $AnyEvent::MP::Kernel::NODE_ADDR->{$self->{id}}
131 };
132
133 unless (@addresses) {
134 # on global nodes, all bets are off now - we either know the node, or we don't
135 unless ($AnyEvent::MP::Kernel::GLOBAL) {
136 $self->{connect_w} = AnyEvent::MP::Kernel::global_req (
137 g_find => $self->{id},
138 sub {
139 return unless $self; # just to be sure
140 return unless @{ $_[0] };
141
142 local $AnyEvent::MP::Kernel::GLOBAL_ADDR->{$self->{id}} = $_[0]; #d# UGLY
143 delete $self->{connect_w};
144 $self->connect;
145 }
146 );
147 }
148
149 return;
150 }
151
152 $self->{connect_addr} = \@addresses; # a bit weird, but efficient
153
154 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]");
155
156 my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
157
158 $interval = ($monitor - $interval) / @addresses
159 if ($monitor - $interval) / @addresses < $interval;
160
161 $interval = 0.4 if $interval < 0.4;
162
163 my @endpoints;
164
165 $self->{connect_w} = AE::timer 0, $interval * (0.9 + 0.1 * rand), sub {
166 @endpoints = @addresses
167 unless @endpoints;
168
169 my $endpoint = shift @endpoints;
170
171 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint");
172
173 $self->{trial}{$endpoint} ||= do {
174 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
175 or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");
176
177 AnyEvent::MP::Transport::mp_connect
178 $host, $port,
179 sub { delete $self->{trial}{$endpoint} },
180 };
181 };
48} 182}
49 183
50sub kill { 184sub kill {
51 my ($self, $port, @reason) = @_; 185 my ($self, $port, @reason) = @_;
52 186
53 $self->send (["", kil => $port, @reason]); 187 $self->{send} (["", kil => $port, @reason]);
54} 188}
55 189
56sub monitor { 190sub monitor {
57 my ($self, $portid, $cb) = @_; 191 my ($self, $portid, $cb) = @_;
58 192
59 return $cb->(transport_error => "node unreachable")
60 if $self->{failed};
61
62 my $list = $self->{lmon}{$portid} ||= []; 193 my $list = $self->{lmon}{$portid} ||= [];
63 194
64 $self->send (["", mon1 => $portid]) 195 $self->send (["", mon1 => $portid])
65 unless @$list; 196 unless @$list || !length $portid;
66 197
67 push @$list, $cb; 198 push @$list, $cb;
68} 199}
69 200
70sub unmonitor { 201sub unmonitor {
… …
79 $self->send (["", mon0 => $portid]); 210 $self->send (["", mon0 => $portid]);
80 delete $self->{monitor}{$portid}; 211 delete $self->{monitor}{$portid};
81 } 212 }
82} 213}
83 214
84sub set_transport { 215package AnyEvent::MP::Node::Self;
85 my ($self, $transport) = @_;
86 216
87 $self->clr_transport 217use base "AnyEvent::MP::Node";
88 if $self->{transport};
89
90 if (
91 exists $self->{remote_uniq}
92 && $self->{remote_uniq} ne $transport->{remote_uniq}
93 ) {
94 # uniq changed, different node
95 $self->fail (transport_error => $self->{noderef}, "node was restarted");
96 }
97
98 delete $self->{trial};
99 delete $self->{next_connect};
100 delete $self->{failed};
101
102 $self->{remote_uniq} = $transport->{remote_uniq};
103 $self->{transport} = $transport;
104
105 $transport->send ($_)
106 for @{ delete $self->{queue} || [] };
107}
108
109sub fail {
110 my ($self, @reason) = @_;
111
112 delete $self->{queue};
113
114 $self->{failed} = 1;
115
116 if (my $mon = delete $self->{lmon}) {
117 $_->(@reason) for map @$_, values %$mon;
118 }
119}
120
121sub clr_transport {
122 my ($self, @reason) = @_;
123
124 delete $self->{transport};
125 $self->connect;
126}
127 218
128sub connect { 219sub connect {
220 # we are trivially connected
221}
222
223# delay every so often to avoid recursion, also used to delay after spawn
224our $DELAY = -50;
225our @DELAY;
226our $DELAY_W;
227
228sub _send_delayed {
229 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE{""};
230 (shift @DELAY)->()
231 while @DELAY;
232 undef $DELAY_W;
233 $DELAY = -50;
234}
235
236sub transport_reset {
129 my ($self) = @_; 237 my ($self) = @_;
130 238
131 Scalar::Util::weaken $self; 239 Scalar::Util::weaken $self;
132 240
133 $self->{retry} ||= [split /,/, $self->{noderef}]; 241 $self->{send} = sub {
134 242 if ($DELAY++ >= 0) {
135 my $endpoint = shift @{ $self->{retry} }; 243 my $msg = $_[0];
136 244 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
137 if (defined $endpoint) { 245 $DELAY_W ||= AE::timer 0, 0, \&_send_delayed;
138 $self->{trial}{$endpoint} ||= do {
139 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
140 or return $AnyEvent::MP::Base::WARN->("$self->{noderef}: not a resolved node reference.");
141
142 my ($w, $g);
143
144 $w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub {
145 delete $self->{trial}{$endpoint};
146 };
147 $g = AnyEvent::MP::Transport::mp_connect
148 $host, $port,
149 sub {
150 delete $self->{trial}{$endpoint}
151 unless @_;
152 $g = shift;
153 };
154 ; 246 return;
155
156 [$w, \$g]
157 }; 247 }
158 } else { 248
159 delete $self->{retry}; 249 local $AnyEvent::MP::Kernel::SRCNODE = $self;
160 $self->fail (transport_error => $self->{noderef}, "unable to connect"); 250 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
161 } 251 };
162
163 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
164 $self->connect;
165 };
166} 252}
167 253
168package AnyEvent::MP::Node::Slave; 254sub transport_connect {
169
170use base "AnyEvent::MP::Node::Direct";
171
172sub connect {
173 my ($self) = @_; 255 my ($self, $tp) = @_;
174 256
175 $self->fail (transport_error => $self->{noderef}, "unable to connect to slave node"); 257 $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})");
176}
177
178package AnyEvent::MP::Node::Self;
179
180use base "AnyEvent::MP::Node";
181
182sub set_transport {
183 Carp::confess "FATAL error, set_transport was called on local node";
184}
185
186sub send {
187 local $AnyEvent::MP::Base::SRCNODE = $_[0];
188 AnyEvent::MP::Base::_inject (@{ $_[1] });
189} 258}
190 259
191sub kill { 260sub kill {
192 my ($self, $port, @reason) = @_; 261 my (undef, @args) = @_;
193 262
194 delete $AnyEvent::MP::Base::PORT{$port}; 263 # we _always_ delay kil's, to avoid calling mon callbacks
195 delete $AnyEvent::MP::Base::PORT_DATA{$port}; 264 # from anything but the event loop context.
196 265 $DELAY = 1;
197 my $mon = delete $AnyEvent::MP::Base::LMON{$port} 266 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
198 or !@reason 267 $DELAY_W ||= AE::timer 0, 0, \&_send_delayed;
199 or $AnyEvent::MP::Base::WARN->("unmonitored local port $port died with reason: @reason");
200
201 $_->(@reason) for values %$mon;
202} 268}
203 269
204sub monitor { 270sub monitor {
205 my ($self, $portid, $cb) = @_; 271 # maybe always delay, too?
206 272 if ($DELAY_W) {
207 return $cb->(no_such_port => "cannot monitor nonexistent port") 273 my @args = @_;
208 unless exists $AnyEvent::MP::Base::PORT{$portid}; 274 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
209 275 return;
210 $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb; 276 }
277 &AnyEvent::MP::Kernel::_monitor;
211} 278}
212 279
213sub unmonitor { 280sub unmonitor {
214 my ($self, $portid, $cb) = @_; 281 # no need to always delay
282 if ($DELAY_W) {
283 my @args = @_;
284 push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) };
285 return;
286 }
215 287
216 delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0}; 288 &AnyEvent::MP::Kernel::_unmonitor;
217} 289}
218 290
219=head1 SEE ALSO 291=head1 SEE ALSO
220 292
221L<AnyEvent>. 293L<AnyEvent::MP>.
222 294
223=head1 AUTHOR 295=head1 AUTHOR
224 296
225 Marc Lehmann <schmorp@schmorp.de> 297 Marc Lehmann <schmorp@schmorp.de>
226 http://home.schmorp.de/ 298 http://home.schmorp.de/

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