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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 1.68 by root, Sun Aug 28 09:39:23 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 or return $self->transport_error (transport_error => $self->{id}, "unable to connect to any address");
178
179 AE::log 9 => "connecting to $self->{id} at $endpoint";
180
181 $self->{trial}{$endpoint} ||= do {
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 };
43 } 189 };
44} 190}
45 191
46sub kill { 192sub kill {
47 my ($self, $port, @reason) = @_; 193 my ($self, $port, @reason) = @_;
48 194
49 $self->send (["", kil => $port, @reason]); 195 $self->{send} (["", kil1 => $port, @reason]);
50} 196}
51 197
52sub monitor { 198sub monitor {
53 my ($self, $portid, $cb) = @_; 199 my ($self, $portid, $cb) = @_;
54 200
55 my $list = $self->{lmon}{$portid} ||= []; 201 my $list = $self->{lmon}{$portid} ||= [];
56 202
57 $self->send (["", mon1 => $portid]) 203 $self->send (["", mon1 => $portid])
58 unless @$list; 204 unless @$list || !length $portid;
59 205
60 push @$list, $cb; 206 push @$list, $cb;
61} 207}
62 208
63sub unmonitor { 209sub unmonitor {
… …
72 $self->send (["", mon0 => $portid]); 218 $self->send (["", mon0 => $portid]);
73 delete $self->{monitor}{$portid}; 219 delete $self->{monitor}{$portid};
74 } 220 }
75} 221}
76 222
77sub set_transport { 223package AnyEvent::MP::Node::Self; # the local node
78 my ($self, $transport) = @_;
79 224
80 $self->clr_transport 225use 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}
109 226
110sub 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 $DELAY = -50;
242};
243
244sub transport_reset {
111 my ($self) = @_; 245 my ($self) = @_;
112 246
113 Scalar::Util::weaken $self; 247 Scalar::Util::weaken $self;
114 248
115 $self->{retry} ||= [split /,/, $self->{noderef}]; 249 $self->{send} = sub {
116 250 if (++$DELAY > 0) {
117 my $endpoint = shift @{ $self->{retry} }; 251 my $msg = $_[0];
118 252 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
119 if (defined $endpoint) { 253 $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 $g = shift;
135 };
136 ; 254 return;
137
138 [$w, \$g]
139 }; 255 }
140 } else {
141 $self->fail (transport_error => $self->{noderef}, "unable to connect");
142 }
143 256
144 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub { 257 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
145 delete $self->{retry}; 258 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
146 $self->connect;
147 }; 259 };
148} 260}
149 261
150package AnyEvent::MP::Node::Slave; 262sub transport_connect {
151
152use base "AnyEvent::MP::Node::Direct";
153
154sub connect {
155 my ($self) = @_; 263 my ($self, $tp) = @_;
156 264
157 $self->fail (transport_error => $self->{noderef}, "unable to connect to slave node"); 265 AE::log 9 => "I refuse to talk to myself ($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 (@{ $_[1] });
171} 266}
172 267
173sub kill { 268sub kill {
174 my ($self, $port, @reason) = @_; 269 my (undef, @args) = @_;
175 270
176 delete $AnyEvent::MP::Base::PORT{$port}; 271 # we _always_ delay kil's, to avoid calling mon callbacks
177 delete $AnyEvent::MP::Base::PORT_DATA{$port}; 272 # from anything but the event loop context.
178 273 $DELAY = 1;
179 my $mon = delete $AnyEvent::MP::Base::LMON{$port} 274 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
180 or !@reason 275 $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} 276}
185 277
186sub monitor { 278sub monitor {
187 my ($self, $portid, $cb) = @_; 279 # maybe always delay, too?
188 280 if ($DELAY_W) {
189 return $cb->(no_such_port => "cannot monitor nonexistent port") 281 my @args = @_;
190 unless exists $AnyEvent::MP::Base::PORT{$portid}; 282 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
191 283 return;
192 $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb; 284 }
285 &AnyEvent::MP::Kernel::_monitor;
193} 286}
194 287
195sub unmonitor { 288sub unmonitor {
196 my ($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 }
197 295
198 delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0}; 296 &AnyEvent::MP::Kernel::_unmonitor;
199} 297}
200 298
201=head1 SEE ALSO 299=head1 SEE ALSO
202 300
203L<AnyEvent::MP>. 301L<AnyEvent::MP>.

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