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Comparing AnyEvent-MP/MP/Node.pm (file contents):
Revision 1.17 by root, Mon Aug 10 01:37:19 2009 UTC vs.
Revision 1.67 by root, Sun Aug 28 08:23:34 2016 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
23sub new { 24sub new {
24 my ($class, $noderef) = @_; 25 my ($self, $id) = @_;
25 26
26 bless { noderef => $noderef }, $class 27 $self = bless { id => $id }, $self;
27}
28 28
29package 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
30 53
31use base "AnyEvent::MP::Node"; 54use base "AnyEvent::MP::Node";
32 55
33sub send { 56# called at init time, mostly sets {send}
57sub transport_reset {
34 my ($self, $msg) = @_; 58 my ($self) = @_;
35 59
36 if ($self->{transport}) { 60 delete $self->{transport};
37 $self->{transport}->send ($msg); 61
38 } elsif ($self->{queue}) { 62 Scalar::Util::weaken $self;
63
64 $self->{send} = sub {
39 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);
40 } else { 142 } else {
41 $self->{queue} = [$msg]; 143 # on global nodes, all bets are off now - we either know the node, or we don't
42 $self->connect; 144 if ($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 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
182 or return AE::log critical => "$self->{id}: '$endpoint' is not a resolved node reference.";
183
184 AnyEvent::MP::Transport::mp_connect
185 $host, $port,
186 sub { delete $self->{trial}{$endpoint} },
187 };
43 } 188 };
44} 189}
45 190
46sub kill { 191sub kill {
47 my ($self, $port, @reason) = @_; 192 my ($self, $port, @reason) = @_;
48 193
49 $self->send (["", kil => $port, @reason]); 194 $self->{send} (["", kil1 => $port, @reason]);
50} 195}
51 196
52sub monitor { 197sub monitor {
53 my ($self, $portid, $cb) = @_; 198 my ($self, $portid, $cb) = @_;
54 199
55 my $list = $self->{lmon}{$portid} ||= []; 200 my $list = $self->{lmon}{$portid} ||= [];
56 201
57 $self->send (["", mon1 => $portid]) 202 $self->send (["", mon1 => $portid])
58 unless @$list; 203 unless @$list || !length $portid;
59 204
60 push @$list, $cb; 205 push @$list, $cb;
61} 206}
62 207
63sub unmonitor { 208sub unmonitor {
… …
72 $self->send (["", mon0 => $portid]); 217 $self->send (["", mon0 => $portid]);
73 delete $self->{monitor}{$portid}; 218 delete $self->{monitor}{$portid};
74 } 219 }
75} 220}
76 221
77sub set_transport { 222package AnyEvent::MP::Node::Self; # the local node
78 my ($self, $transport) = @_;
79 223
80 $self->clr_transport 224use base "AnyEvent::MP::Node";
81 if $self->{transport};
82
83 delete $self->{trial};
84 delete $self->{retry};
85 delete $self->{next_connect};
86
87 $self->{transport} = $transport;
88
89 $transport->send ($_)
90 for @{ delete $self->{queue} || [] };
91}
92
93sub fail {
94 my ($self, @reason) = @_;
95
96 delete $self->{queue};
97
98 if (my $mon = delete $self->{lmon}) {
99 $_->(@reason) for map @$_, values %$mon;
100 }
101}
102
103sub clr_transport {
104 my ($self, @reason) = @_;
105
106 delete $self->{transport};
107 $self->connect;
108}
109 225
110sub connect { 226sub connect {
227 # we are trivially connected
228}
229
230# delay every so often to avoid recursion, also used to delay after spawn
231our $DELAY = -50;
232our @DELAY;
233our $DELAY_W;
234
235our $send_delayed = sub {
236 $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
237 (shift @DELAY)->()
238 while @DELAY;
239 undef $DELAY_W;
240 $DELAY = -50;
241};
242
243sub transport_reset {
111 my ($self) = @_; 244 my ($self) = @_;
112 245
113 Scalar::Util::weaken $self; 246 Scalar::Util::weaken $self;
114 247
115 $self->{retry} ||= [split /,/, $self->{noderef}]; 248 $self->{send} = sub {
116 249 if (++$DELAY > 0) {
117 my $endpoint = shift @{ $self->{retry} }; 250 my $msg = $_[0];
118 251 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
119 if (defined $endpoint) { 252 $DELAY_W ||= AE::timer 0, 0, $send_delayed;
120 $self->{trial}{$endpoint} ||= do {
121 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
122 or return $AnyEvent::MP::Base::WARN->("$self->{noderef}: not a resolved node reference.");
123
124 my ($w, $g);
125
126 $w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub {
127 delete $self->{trial}{$endpoint};
128 };
129 $g = AnyEvent::MP::Transport::mp_connect
130 $host, $port,
131 sub {
132 delete $self->{trial}{$endpoint}
133 unless @_;
134 $g = shift;
135 };
136 ; 253 return;
137
138 [$w, \$g]
139 }; 254 }
140 } else {
141 $self->fail (transport_error => $self->{noderef}, "unable to connect");
142 }
143 255
144 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub { 256 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
145 delete $self->{retry}; 257 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
146 $self->connect;
147 }; 258 };
148} 259}
149 260
150package AnyEvent::MP::Node::Slave; 261sub transport_connect {
151
152use base "AnyEvent::MP::Node::Direct";
153
154sub connect {
155 my ($self) = @_; 262 my ($self, $tp) = @_;
156 263
157 $self->fail (transport_error => $self->{noderef}, "unable to connect to slave node"); 264 AE::log 9 => "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})";
158}
159
160package AnyEvent::MP::Node::Self;
161
162use base "AnyEvent::MP::Node";
163
164sub set_transport {
165 Carp::confess "FATAL error, set_transport was called on local node";
166}
167
168sub send {
169 local $AnyEvent::MP::Base::SRCNODE = $_[0];
170 AnyEvent::MP::Base::_inject (@{ $_[1] });
171} 265}
172 266
173sub kill { 267sub kill {
174 my ($self, $port, @reason) = @_; 268 my (undef, @args) = @_;
175 269
176 delete $AnyEvent::MP::Base::PORT{$port}; 270 # we _always_ delay kil's, to avoid calling mon callbacks
177 delete $AnyEvent::MP::Base::PORT_DATA{$port}; 271 # from anything but the event loop context.
178 272 $DELAY = 1;
179 my $mon = delete $AnyEvent::MP::Base::LMON{$port} 273 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
180 or !@reason 274 $DELAY_W ||= AE::timer 0, 0, $send_delayed;
181 or $AnyEvent::MP::Base::WARN->("unmonitored local port $port died with reason: @reason");
182
183 $_->(@reason) for values %$mon;
184} 275}
185 276
186sub monitor { 277sub monitor {
187 my ($self, $portid, $cb) = @_; 278 # maybe always delay, too?
188 279 if ($DELAY_W) {
189 return $cb->(no_such_port => "cannot monitor nonexistent port") 280 my @args = @_;
190 unless exists $AnyEvent::MP::Base::PORT{$portid}; 281 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
191 282 return;
192 $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb; 283 }
284 &AnyEvent::MP::Kernel::_monitor;
193} 285}
194 286
195sub unmonitor { 287sub unmonitor {
196 my ($self, $portid, $cb) = @_; 288 # no need to always delay
289 if ($DELAY_W) {
290 my @args = @_;
291 push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) };
292 return;
293 }
197 294
198 delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0}; 295 &AnyEvent::MP::Kernel::_unmonitor;
199} 296}
200 297
201=head1 SEE ALSO 298=head1 SEE ALSO
202 299
203L<AnyEvent::MP>. 300L<AnyEvent::MP>.

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