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Comparing AnyEvent-MP/MP/Node.pm (file contents):
Revision 1.13 by root, Wed Aug 5 22:40:51 2009 UTC vs.
Revision 1.64 by root, Fri Mar 23 21:16:25 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 $self->init;
30 $self->transport_reset;
31
32 $self
33}
34
35sub init {
36 #
37}
38
39sub send {
40 &{ shift->{send} }
41}
42
43# nodes reachable via the network
44package AnyEvent::MP::Node::Remote; # a remote node
34 45
35use base "AnyEvent::MP::Node"; 46use base "AnyEvent::MP::Node";
36 47
37sub send { 48# called at init time, mostly sets {send}
49sub transport_reset {
38 my ($self, $msg) = @_; 50 my ($self) = @_;
39 51
40 if ($self->{transport}) { 52 delete $self->{transport};
41 $self->{transport}->send ($msg); 53
42 } elsif ($self->{queue}) { 54 Scalar::Util::weaken $self;
55
56 $self->{send} = sub {
43 push @{ $self->{queue} }, $msg; 57 push @{$self->{queue}}, shift;
58 $self->connect;
59 };
60}
61
62# called each time we fail to establish a connection,
63# or the existing connection failed
64sub transport_error {
65 my ($self, @reason) = @_;
66
67 my $no_transport = !$self->{transport};
68
69 delete $self->{connect_w};
70 delete $self->{connect_to};
71
72 delete $self->{queue};
73 $self->transport_reset;
74
75 if (my $mon = delete $self->{lmon}) {
76 $_->(@reason) for map @$_, values %$mon;
77 }
78
79 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
80 unless $no_transport;
81
82 # if we are here and are idle, we nuke ourselves
83 delete $AnyEvent::MP::Kernel::NODE{$self->{id}}
84 unless $self->{transport} || $self->{connect_to};
85}
86
87# called after handshake was successful
88sub transport_connect {
89 my ($self, $transport) = @_;
90
91 delete $self->{trial};
92
93 $self->transport_error (transport_error => $self->{id}, "switched connections")
94 if $self->{transport};
95
96 delete $self->{connect_w};
97 delete $self->{connect_to};
98
99 $self->{transport} = $transport;
100
101 my $transport_send = $transport->{send};
102
103 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
104
105 $self->{send} = $transport_send;
106
107 $transport_send->($_)
108 for @{ delete $self->{queue} || [] };
109}
110
111sub connect {
112 my ($self) = @_;
113
114 return if $self->{transport};
115 return if $self->{connect_w};
116
117 Scalar::Util::weaken $self;
118 use Carp;Carp::cluck;#d#
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);
44 } else { 129 } else {
45 $self->{queue} = [$msg]; 130 # on global nodes, all bets are off now - we either know the node, or we don't
46 $self->connect; 131 unless ($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 AE::log 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 AE::log 9 => "connecting to $self->{id} at $endpoint";
161
162 $self->{trial}{$endpoint} ||= do {
163 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
164 or return AE::log critical => "$self->{id}: '$endpoint' is not a resolved node reference.";
165
166 AnyEvent::MP::Transport::mp_connect
167 $host, $port,
168 sub { delete $self->{trial}{$endpoint} },
169 };
47 } 170 };
48} 171}
49 172
50sub kill { 173sub kill {
51 my ($self, $port, @reason) = @_; 174 my ($self, $port, @reason) = @_;
52 175
53 $self->send (["", kil => $port, @reason]); 176 $self->{send} (["", kil => $port, @reason]);
54} 177}
55 178
56sub monitor { 179sub monitor {
57 my ($self, $portid, $cb) = @_; 180 my ($self, $portid, $cb) = @_;
58 181
59 return $cb->(transport_error => "node unreachable")
60 if $self->{failed};
61
62 my $list = $self->{lmon}{$portid} ||= []; 182 my $list = $self->{lmon}{$portid} ||= [];
63 183
64 $self->send (["", mon1 => $portid]) 184 $self->send (["", mon1 => $portid])
65 unless @$list; 185 unless @$list || !length $portid;
66 186
67 push @$list, $cb; 187 push @$list, $cb;
68} 188}
69 189
70sub unmonitor { 190sub unmonitor {
… …
79 $self->send (["", mon0 => $portid]); 199 $self->send (["", mon0 => $portid]);
80 delete $self->{monitor}{$portid}; 200 delete $self->{monitor}{$portid};
81 } 201 }
82} 202}
83 203
84sub set_transport { 204package AnyEvent::MP::Node::Self; # the local node
85 my ($self, $transport) = @_;
86 205
87 $self->clr_transport 206use 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}
127 207
128sub 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
217our $send_delayed = sub {
218 $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
219 (shift @DELAY)->()
220 while @DELAY;
221 undef $DELAY_W;
222 $DELAY = -50;
223};
224
225sub transport_reset {
129 my ($self) = @_; 226 my ($self) = @_;
130 227
131 Scalar::Util::weaken $self; 228 Scalar::Util::weaken $self;
132 229
133 $self->{retry} ||= [split /,/, $self->{noderef}]; 230 $self->{send} = sub {
134 231 if (++$DELAY > 0) {
135 my $endpoint = shift @{ $self->{retry} }; 232 my $msg = $_[0];
136 233 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
137 if (defined $endpoint) { 234 $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 $g = shift;
153 };
154 ; 235 return;
155
156 [$w, \$g]
157 }; 236 }
158 } else { 237
159 delete $self->{retry}; 238 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
160 $self->fail (transport_error => $self->{noderef}, "unable to connect"); 239 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
161 } 240 };
162
163 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
164 $self->connect;
165 };
166} 241}
167 242
168package AnyEvent::MP::Node::Slave; 243sub transport_connect {
169
170use base "AnyEvent::MP::Node::Direct";
171
172sub connect {
173 my ($self) = @_; 244 my ($self, $tp) = @_;
174 245
175 $self->fail (transport_error => $self->{noderef}, "unable to connect to slave node"); 246 AE::log 9 => "I refuse to talk to myself ($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 (@{ $_[1] });
189} 247}
190 248
191sub kill { 249sub kill {
192 my ($self, $port, @reason) = @_; 250 my (undef, @args) = @_;
193 251
194 delete $AnyEvent::MP::Base::PORT{$port}; 252 # we _always_ delay kil's, to avoid calling mon callbacks
195 delete $AnyEvent::MP::Base::PORT_DATA{$port}; 253 # from anything but the event loop context.
196 254 $DELAY = 1;
197 my $mon = delete $AnyEvent::MP::Base::LMON{$port} 255 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
198 or !@reason 256 $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} 257}
203 258
204sub monitor { 259sub monitor {
205 my ($self, $portid, $cb) = @_; 260 # maybe always delay, too?
206 261 if ($DELAY_W) {
207 return $cb->() 262 my @args = @_;
208 unless exists $AnyEvent::MP::Base::PORT{$portid}; 263 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
209 264 return;
210 $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb; 265 }
266 &AnyEvent::MP::Kernel::_monitor;
211} 267}
212 268
213sub unmonitor { 269sub unmonitor {
214 my ($self, $portid, $cb) = @_; 270 # no need to always delay
271 if ($DELAY_W) {
272 my @args = @_;
273 push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) };
274 return;
275 }
215 276
216 delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0}; 277 &AnyEvent::MP::Kernel::_unmonitor;
217} 278}
218 279
219=head1 SEE ALSO 280=head1 SEE ALSO
220 281
221L<AnyEvent>. 282L<AnyEvent::MP>.
222 283
223=head1 AUTHOR 284=head1 AUTHOR
224 285
225 Marc Lehmann <schmorp@schmorp.de> 286 Marc Lehmann <schmorp@schmorp.de>
226 http://home.schmorp.de/ 287 http://home.schmorp.de/

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