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Comparing AnyEvent-MP/MP/Node.pm (file contents):
Revision 1.10 by root, Tue Aug 4 23:35:51 2009 UTC vs.
Revision 1.66 by root, Sat Mar 24 00:48:54 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 10
11This is an internal utility module, horrible to look at, so don't.
12
11=cut 13=cut
12 14
13package AnyEvent::MP::Node; 15package AnyEvent::MP::Node; # base class for nodes
14 16
15use common::sense; 17use common::sense;
16 18
17use AE ();
18use AnyEvent::Util (); 19use AnyEvent ();
19use AnyEvent::Socket (); 20use AnyEvent::Socket ();
20 21
21use AnyEvent::MP::Transport (); 22use AnyEvent::MP::Transport ();
22 23
23use base Exporter::;
24
25our $VERSION = '0.0';
26
27sub new { 24sub new {
28 my ($class, $noderef) = @_; 25 my ($self, $id) = @_;
29 26
30 bless { noderef => $noderef }, $class 27 $self = bless { id => $id }, $self;
31}
32 28
33package AnyEvent::MP::Node::Direct; 29 # register
30 $AnyEvent::MP::Kernel::NODE{$id} = $self;
31
32 $self->init;
33 $self->transport_reset;
34
35 $self
36}
37
38sub DESTROY {
39 # unregister
40 delete $AnyEvent::MP::Kernel::NODE{$_[0]{id}};
41}
42
43sub init {
44 #
45}
46
47sub send {
48 &{ shift->{send} }
49}
50
51# nodes reachable via the network
52package AnyEvent::MP::Node::Remote; # a remote node
34 53
35use base "AnyEvent::MP::Node"; 54use base "AnyEvent::MP::Node";
36 55
37sub send { 56# called at init time, mostly sets {send}
57sub transport_reset {
38 my ($self, $msg) = @_; 58 my ($self) = @_;
39 59
40 if ($self->{transport}) { 60 delete $self->{transport};
41 $self->{transport}->send ($msg); 61
42 } elsif ($self->{queue}) { 62 Scalar::Util::weaken $self;
63
64 $self->{send} = sub {
43 push @{ $self->{queue} }, $msg; 65 push @{$self->{queue}}, shift;
66 $self->connect;
67 };
68}
69
70# called each time we fail to establish a connection,
71# or the existing connection failed
72sub transport_error {
73 my ($self, @reason) = @_;
74
75 my $no_transport = !$self->{transport};
76
77 delete $self->{connect_w};
78 delete $self->{connect_to};
79
80 delete $self->{queue};
81 $self->transport_reset;
82
83 if (my $mon = delete $self->{lmon}) {
84 $_->(@reason) for map @$_, values %$mon;
85 }
86
87 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
88 unless $no_transport;
89
90 # we weaken the node reference, so it can go away if unused
91 Scalar::Util::weaken $AnyEvent::MP::Kernel::NODE{$self->{id}}
92 unless $self->{connect_to};
93
94 AE::log 9 => "@reason";
95}
96
97# called after handshake was successful
98sub transport_connect {
99 my ($self, $transport) = @_;
100
101 delete $self->{trial};
102
103 $self->transport_error (transport_error => $self->{id}, "switched connections")
104 if $self->{transport};
105
106 delete $self->{connect_w};
107 delete $self->{connect_to};
108
109 $self->{transport} = $transport;
110
111 my $transport_send = $transport->{send};
112
113 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
114
115 $self->{send} = $transport_send;
116
117 $transport_send->($_)
118 for @{ delete $self->{queue} || [] };
119}
120
121sub connect {
122 my ($self) = @_;
123
124 return if $self->{transport};
125 return if $self->{connect_w};
126
127 # we unweaken the node reference, in case it was weakened before
128 $AnyEvent::MP::Kernel::NODE{$self->{id}}
129 = $AnyEvent::MP::Kernel::NODE{$self->{id}};
130
131 Scalar::Util::weaken $self;
132
133 $self->{connect_to} ||= AE::timer $AnyEvent::MP::Kernel::CONFIG->{connect_interval}, 0, sub {
134 $self->transport_error (transport_error => $self->{id}, "connect timeout");
135 };
136
137 # maybe @$addresses?
138 my $addresses = $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}};
139
140 if ($addresses) {
141 $self->connect_to ($addresses);
44 } else { 142 } else {
45 $self->{queue} = [$msg]; 143 # on global nodes, all bets are off now - we either know the node, or we don't
46 $self->connect; 144 if ($AnyEvent::MP::Kernel::GLOBAL) {
145 $self->transport_error (transport_error => $self->{id}, "no known address");
146 } else {
147 AnyEvent::MP::Kernel::g_find ($self->{id});
148 }
149 }
150}
151
152sub connect_to {
153 my ($self, $addresses) = @_;
154
155 return if $self->{transport};
156 return if $self->{connect_w};
157
158 unless (@$addresses) {
159 $self->transport_error (transport_error => $self->{id}, "no known address");
160 return;
161 }
162
163 AE::log 9 => "connecting to $self->{id} with [@$addresses]";
164
165 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
166 my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
167
168 $interval = ($monitor - $interval) / @$addresses
169 if ($monitor - $interval) / @$addresses < $interval;
170
171 $interval = 0.4 if $interval < 0.4;
172
173 my @endpoints = reverse @$addresses;
174
175 $self->{connect_w} = AE::timer 0, $interval * (0.9 + 0.1 * rand), sub {
176 my $endpoint = pop @endpoints;
177
178 AE::log 9 => "connecting to $self->{id} at $endpoint";
179
180 $self->{trial}{$endpoint} ||= do {
181 use Carp;AnyEvent::Socket::parse_hostport $endpoint or Carp::confess "not a reslved blabla\n";#d#
182 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
183 or return AE::log critical => "$self->{id}: '$endpoint' is not a resolved node reference.";
184
185 AnyEvent::MP::Transport::mp_connect
186 $host, $port,
187 sub { delete $self->{trial}{$endpoint} },
188 };
47 } 189 };
48} 190}
49 191
50sub kill { 192sub kill {
51 my ($self, $port, @reason) = @_; 193 my ($self, $port, @reason) = @_;
52 194
53 $self->send (["", kil => $port, @reason]); 195 $self->{send} (["", kil1 => $port, @reason]);
54} 196}
55 197
56sub monitor { 198sub monitor {
57 my ($self, $portid, $cb) = @_; 199 my ($self, $portid, $cb) = @_;
58 200
59 return $cb->("node failed conenction")
60 if $self->{failed};
61
62 my $list = $self->{lmon}{$portid} ||= []; 201 my $list = $self->{lmon}{$portid} ||= [];
63 202
64 $self->send (["", mon1 => $portid]) 203 $self->send (["", mon1 => $portid])
65 unless @$list; 204 unless @$list || !length $portid;
66 205
67 push @$list, $cb; 206 push @$list, $cb;
68} 207}
69 208
70sub unmonitor { 209sub unmonitor {
… …
79 $self->send (["", mon0 => $portid]); 218 $self->send (["", mon0 => $portid]);
80 delete $self->{monitor}{$portid}; 219 delete $self->{monitor}{$portid};
81 } 220 }
82} 221}
83 222
84sub set_transport { 223package AnyEvent::MP::Node::Self; # the local node
85 my ($self, $transport) = @_;
86 224
87 $self->clr_transport 225use 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 ("node restart detected");
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}
127 226
128sub connect { 227sub connect {
228 # we are trivially connected
229}
230
231# delay every so often to avoid recursion, also used to delay after spawn
232our $DELAY = -50;
233our @DELAY;
234our $DELAY_W;
235
236our $send_delayed = sub {
237 $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
238 (shift @DELAY)->()
239 while @DELAY;
240 undef $DELAY_W;
241 $DELAY = -50;
242};
243
244sub transport_reset {
129 my ($self) = @_; 245 my ($self) = @_;
130 246
131 Scalar::Util::weaken $self; 247 Scalar::Util::weaken $self;
132 248
133 $self->{retry} ||= [split /,/, $self->{noderef}]; 249 $self->{send} = sub {
134 250 if (++$DELAY > 0) {
135 my $endpoint = shift @{ $self->{retry} }; 251 my $msg = $_[0];
136 252 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
137 if (defined $endpoint) { 253 $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 $g = shift;
153 };
154 ; 254 return;
155
156 [$w, \$g]
157 }; 255 }
158 } else {
159 delete $self->{retry};
160 $self->fail (transport_error => $self->{noderef}, "unable to connect");
161 }
162 256
163 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub { 257 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
164 $self->connect; 258 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
165 }; 259 };
166} 260}
167 261
168package AnyEvent::MP::Node::Self; 262sub transport_connect {
263 my ($self, $tp) = @_;
169 264
170use base "AnyEvent::MP::Node"; 265 AE::log 9 => "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})";
171
172sub set_transport {
173 die "FATAL error, set_transport was called";
174}
175
176sub send {
177 local $AnyEvent::MP::Base::SRCNODE = $_[0];
178 AnyEvent::MP::Base::_inject (@{ $_[1] });
179} 266}
180 267
181sub kill { 268sub kill {
182 my ($self, $port, @reason) = @_; 269 my (undef, @args) = @_;
183 270
184 delete $AnyEvent::MP::Base::PORT{$port}; 271 # we _always_ delay kil's, to avoid calling mon callbacks
185 delete $AnyEvent::MP::Base::PORT_DATA{$port}; 272 # from anything but the event loop context.
186 273 $DELAY = 1;
187 my $mon = delete $AnyEvent::MP::Base::LMON{$port} 274 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
188 or !@reason 275 $DELAY_W ||= AE::timer 0, 0, $send_delayed;
189 or $AnyEvent::MP::Base::WARN->("unmonitored local port $port died with reason: @reason");
190
191 $_->(@reason) for values %$mon;
192} 276}
193 277
194sub monitor { 278sub monitor {
195 my ($self, $portid, $cb) = @_; 279 # maybe always delay, too?
196 280 if ($DELAY_W) {
197 return $cb->() 281 my @args = @_;
198 unless exists $AnyEvent::MP::Base::PORT{$portid}; 282 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
199 283 return;
200 $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb; 284 }
285 &AnyEvent::MP::Kernel::_monitor;
201} 286}
202 287
203sub unmonitor { 288sub unmonitor {
204 my ($self, $portid, $cb) = @_; 289 # no need to always delay
290 if ($DELAY_W) {
291 my @args = @_;
292 push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) };
293 return;
294 }
205 295
206 delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0}; 296 &AnyEvent::MP::Kernel::_unmonitor;
207} 297}
208 298
209=head1 SEE ALSO 299=head1 SEE ALSO
210 300
211L<AnyEvent>. 301L<AnyEvent::MP>.
212 302
213=head1 AUTHOR 303=head1 AUTHOR
214 304
215 Marc Lehmann <schmorp@schmorp.de> 305 Marc Lehmann <schmorp@schmorp.de>
216 http://home.schmorp.de/ 306 http://home.schmorp.de/

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