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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 1.57 by root, Thu Mar 1 18:31:42 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 $self
34}
35
36sub init {
37 #
38}
39
40#d# only needed for bad global code at the moment
41sub transport_error {
42}
43
44sub send {
45 &{ shift->{send} }
46}
47
48# nodes reachable via the network
33package AnyEvent::MP::Node::Direct; 49package AnyEvent::MP::Node::Remote;
34 50
35use base "AnyEvent::MP::Node"; 51use base "AnyEvent::MP::Node";
36 52
37sub send { 53# called at init time, mostly sets {send}
54sub transport_reset {
38 my ($self, $msg) = @_; 55 my ($self) = @_;
39 56
40 if ($self->{transport}) { 57 delete $self->{transport};
41 $self->{transport}->send ($msg); 58
42 } elsif ($self->{queue}) { 59 Scalar::Util::weaken $self;
60
61 $self->{send} = sub {
43 push @{ $self->{queue} }, $msg; 62 push @{$self->{queue}}, shift;
44 } else {
45 $self->{queue} = [$msg];
46 $self->connect; 63 $self->connect;
47 } 64 };
65}
66
67# called each time we fail to establish a connection,
68# or the existing connection failed
69sub transport_error {
70 my ($self, @reason) = @_;
71
72 my $no_transport = !$self->{transport};
73
74 delete $self->{connect_w};
75 delete $self->{connect_to};
76
77 delete $self->{queue};
78 $self->transport_reset;
79
80 if (my $mon = delete $self->{lmon}) {
81 $_->(@reason) for map @$_, values %$mon;
82 }
83
84 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
85 unless $no_transport;
86
87 # if we are here and are idle, we nuke ourselves
88 delete $AnyEvent::MP::Kernel::NODE{$self->{id}}
89 unless $self->{transport} || $self->{connect_to};
90}
91
92# called after handshake was successful
93sub transport_connect {
94 my ($self, $transport) = @_;
95
96 delete $self->{trial};
97
98 $self->transport_error (transport_error => $self->{id}, "switched connections")
99 if $self->{transport};
100
101 delete $self->{connect_addr};
102 delete $self->{connect_w};
103 delete $self->{connect_to};
104
105 $self->{transport} = $transport;
106
107 my $transport_send = $transport->{send};
108
109 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
110
111 $self->{send} = $transport_send;
112
113 $transport_send->($_)
114 for @{ delete $self->{queue} || [] };
115}
116
117sub connect {
118 my ($self) = @_;
119
120 return if $self->{transport};
121 return if $self->{connect_w};
122
123 Scalar::Util::weaken $self;
124
125 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
126
127 $self->{connect_to} ||= AE::timer $monitor, 0, sub {
128 $self->transport_error (transport_error => $self->{id}, "unable to connect");
129 };
130
131 # maybe @$addresses?
132 my @addresses = @{ $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}} };
133
134 unless (@addresses) {
135 # on global nodes, all bets are off now - we either know the node, or we don't
136 unless ($AnyEvent::MP::Kernel::GLOBAL) {
137 AnyEvent::MP::Kernel::g_find ($self->{id});
138 }
139 return;
140 }
141
142 $self->{connect_addr} = \@addresses; # a bit weird, but efficient
143
144 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]");
145
146 my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
147
148 $interval = ($monitor - $interval) / @addresses
149 if ($monitor - $interval) / @addresses < $interval;
150
151 $interval = 0.4 if $interval < 0.4;
152
153 my @endpoints;
154
155 $self->{connect_w} = AE::timer 0, $interval * (0.9 + 0.1 * rand), sub {
156 @endpoints = @addresses
157 unless @endpoints;
158
159 my $endpoint = shift @endpoints;
160
161 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint");
162
163 $self->{trial}{$endpoint} ||= do {
164 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
165 or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");
166
167 AnyEvent::MP::Transport::mp_connect
168 $host, $port,
169 sub { delete $self->{trial}{$endpoint} },
170 };
171 };
48} 172}
49 173
50sub kill { 174sub kill {
51 my ($self, $port, @reason) = @_; 175 my ($self, $port, @reason) = @_;
52 176
53 $self->send (["", kil => $port, @reason]); 177 $self->{send} (["", kil => $port, @reason]);
54} 178}
55 179
56sub monitor { 180sub monitor {
57 my ($self, $portid, $cb) = @_; 181 my ($self, $portid, $cb) = @_;
58 182
59 return $cb->(transport_error => "node unreachable")
60 if $self->{failed};
61
62 my $list = $self->{lmon}{$portid} ||= []; 183 my $list = $self->{lmon}{$portid} ||= [];
63 184
64 $self->send (["", mon1 => $portid]) 185 $self->send (["", mon1 => $portid])
65 unless @$list; 186 unless @$list || !length $portid;
66 187
67 push @$list, $cb; 188 push @$list, $cb;
68} 189}
69 190
70sub unmonitor { 191sub unmonitor {
… …
79 $self->send (["", mon0 => $portid]); 200 $self->send (["", mon0 => $portid]);
80 delete $self->{monitor}{$portid}; 201 delete $self->{monitor}{$portid};
81 } 202 }
82} 203}
83 204
84sub set_transport { 205package AnyEvent::MP::Node::Self;
85 my ($self, $transport) = @_;
86 206
87 $self->clr_transport 207use 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}
127 208
128sub connect { 209sub connect {
210 # we are trivially connected
211}
212
213# delay every so often to avoid recursion, also used to delay after spawn
214our $DELAY = -50;
215our @DELAY;
216our $DELAY_W;
217
218sub _send_delayed {
219 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE{""};
220 (shift @DELAY)->()
221 while @DELAY;
222 undef $DELAY_W;
223 $DELAY = -50;
224}
225
226sub transport_reset {
129 my ($self) = @_; 227 my ($self) = @_;
130 228
131 Scalar::Util::weaken $self; 229 Scalar::Util::weaken $self;
132 230
133 $self->{retry} ||= [split /,/, $self->{noderef}]; 231 $self->{send} = sub {
134 232 if ($DELAY++ >= 0) {
135 my $endpoint = shift @{ $self->{retry} }; 233 my $msg = $_[0];
136 234 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
137 if (defined $endpoint) { 235 $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 $g = shift;
153 };
154 ; 236 return;
155
156 [$w, \$g]
157 }; 237 }
158 } else { 238
159 delete $self->{retry}; 239 local $AnyEvent::MP::Kernel::SRCNODE = $self;
160 $self->fail (transport_error => $self->{noderef}, "unable to connect"); 240 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
161 } 241 };
162
163 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
164 $self->connect;
165 };
166} 242}
167 243
168package AnyEvent::MP::Node::Slave; 244sub transport_connect {
169
170use base "AnyEvent::MP::Node::Direct";
171
172sub connect {
173 my ($self) = @_; 245 my ($self, $tp) = @_;
174 246
175 $self->fail (transport_error => $self->{noderef}, "unable to connect to slave node"); 247 $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($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 (@{ $_[1] });
189} 248}
190 249
191sub kill { 250sub kill {
192 my ($self, $port, @reason) = @_; 251 my (undef, @args) = @_;
193 252
194 delete $AnyEvent::MP::Base::PORT{$port}; 253 # we _always_ delay kil's, to avoid calling mon callbacks
195 delete $AnyEvent::MP::Base::PORT_DATA{$port}; 254 # from anything but the event loop context.
196 255 $DELAY = 1;
197 my $mon = delete $AnyEvent::MP::Base::LMON{$port} 256 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
198 or !@reason 257 $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} 258}
203 259
204sub monitor { 260sub monitor {
205 my ($self, $portid, $cb) = @_; 261 # maybe always delay, too?
206 262 if ($DELAY_W) {
207 return $cb->() 263 my @args = @_;
208 unless exists $AnyEvent::MP::Base::PORT{$portid}; 264 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
209 265 return;
210 $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb; 266 }
267 &AnyEvent::MP::Kernel::_monitor;
211} 268}
212 269
213sub unmonitor { 270sub unmonitor {
214 my ($self, $portid, $cb) = @_; 271 # no need to always delay
272 if ($DELAY_W) {
273 my @args = @_;
274 push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) };
275 return;
276 }
215 277
216 delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0}; 278 &AnyEvent::MP::Kernel::_unmonitor;
217} 279}
218 280
219=head1 SEE ALSO 281=head1 SEE ALSO
220 282
221L<AnyEvent>. 283L<AnyEvent::MP>.
222 284
223=head1 AUTHOR 285=head1 AUTHOR
224 286
225 Marc Lehmann <schmorp@schmorp.de> 287 Marc Lehmann <schmorp@schmorp.de>
226 http://home.schmorp.de/ 288 http://home.schmorp.de/

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