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Comparing AnyEvent-MP/MP/Node.pm (file contents):
Revision 1.20 by root, Thu Aug 13 00:23:36 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 ($self, $noderef) = @_; 25 my ($self, $id) = @_;
25 26
26 $self = bless { noderef => $noderef }, $self; 27 $self = bless { id => $id }, $self;
27 28
29 # register
30 $AnyEvent::MP::Kernel::NODE{$id} = $self;
31
32 $self->init;
28 $self->transport_reset; 33 $self->transport_reset;
29 34
30 $self 35 $self
36}
37
38sub DESTROY {
39 # unregister
40 delete $AnyEvent::MP::Kernel::NODE{$_[0]{id}};
41}
42
43sub init {
44 #
31} 45}
32 46
33sub send { 47sub send {
34 &{ shift->{send} } 48 &{ shift->{send} }
35} 49}
36 50
37package AnyEvent::MP::Node::External; 51# nodes reachable via the network
52package AnyEvent::MP::Node::Remote; # a remote node
38 53
39use base "AnyEvent::MP::Node"; 54use base "AnyEvent::MP::Node";
40 55
41# called at init time, mostly sets {send} 56# called at init time, mostly sets {send}
42sub transport_reset { 57sub transport_reset {
… …
50 push @{$self->{queue}}, shift; 65 push @{$self->{queue}}, shift;
51 $self->connect; 66 $self->connect;
52 }; 67 };
53} 68}
54 69
55# called only after successful handshake 70# called each time we fail to establish a connection,
71# or the existing connection failed
56sub transport_error { 72sub transport_error {
57 my ($self, @reason) = @_; 73 my ($self, @reason) = @_;
58 74
59 $self->{transport} 75 my $no_transport = !$self->{transport};
60 or return; 76
77 delete $self->{connect_w};
78 delete $self->{connect_to};
61 79
62 delete $self->{queue}; 80 delete $self->{queue};
63 $self->transport_reset; 81 $self->transport_reset;
64 82
65 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason);
66
67 if (my $mon = delete $self->{lmon}) { 83 if (my $mon = delete $self->{lmon}) {
68 $_->(@reason) for map @$_, values %$mon; 84 $_->(@reason) for map @$_, values %$mon;
69 } 85 }
86
87 AnyEvent::MP::Kernel::_inject_nodeevent ($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 $self->{connect_to};
93
94 AE::log 9 => "@reason";
70} 95}
71 96
72# called after handshake was successful 97# called after handshake was successful
73sub transport_connect { 98sub transport_connect {
74 my ($self, $transport) = @_; 99 my ($self, $transport) = @_;
75 100
101 delete $self->{trial};
102
76 $self->transport_error (transport_error => "switched connections") 103 $self->transport_error (transport_error => $self->{id}, "switched connections")
77 if $self->{transport}; 104 if $self->{transport};
78 105
79 delete $self->{connect_w}; 106 delete $self->{connect_w};
80 delete $self->{connect_to}; 107 delete $self->{connect_to};
81 108
82 $self->{transport} = $transport; 109 $self->{transport} = $transport;
83 110
84 my $transport_send = $transport->can ("send"); 111 my $transport_send = $transport->{send};
85
86 $self->{send} = sub {
87 $transport_send->($transport, $_[0]);
88 };
89 112
90 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1); 113 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
91 114
115 $self->{send} = $transport_send;
116
92 $transport->send ($_) 117 $transport_send->($_)
93 for @{ delete $self->{queue} || [] }; 118 for @{ delete $self->{queue} || [] };
94} 119}
95 120
96sub connect { 121sub connect {
97 my ($self) = @_; 122 my ($self) = @_;
98 123
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
99 Scalar::Util::weaken $self; 131 Scalar::Util::weaken $self;
100 132
101 $self->{connect_to} ||= AE::timer 133 $self->{connect_to} ||= AE::timer $AnyEvent::MP::Kernel::CONFIG->{connect_interval}, 0, sub {
102 $AnyEvent::MP::Config::CFG{monitor_timeout} || $AnyEvent::MP::Kernel::MONITOR_TIMEOUT,
103 0,
104 sub {
105 $self->transport_error (transport_error => $self->{noderef}, "unable to connect"); 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);
142 } else {
143 # on global nodes, all bets are off now - we either know the node, or we don't
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} },
106 }; 187 };
107
108 unless ($self->{connect_w}) {
109 my @endpoints;
110 my %trial;
111
112 $self->{connect_w} = AE::timer
113 0,
114 $AnyEvent::MP::Config::CFG{connect_interval} || $AnyEvent::MP::Kernel::CONNECT_INTERVAL,
115 sub {
116 @endpoints = split /,/, $self->{noderef}
117 unless @endpoints;
118
119 my $endpoint = shift @endpoints;
120
121 $trial{$endpoint} ||= do {
122 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
123 or return $AnyEvent::MP::Kernel::WARN->("$self->{noderef}: not a resolved node reference.");
124
125 AnyEvent::MP::Transport::mp_connect
126 $host, $port,
127 sub { delete $trial{$endpoint} }
128 ;
129 };
130 }
131 ;
132 } 188 };
133} 189}
134 190
135sub kill { 191sub kill {
136 my ($self, $port, @reason) = @_; 192 my ($self, $port, @reason) = @_;
137 193
138 $self->send (["", kil => $port, @reason]); 194 $self->{send} (["", kil1 => $port, @reason]);
139} 195}
140 196
141sub monitor { 197sub monitor {
142 my ($self, $portid, $cb) = @_; 198 my ($self, $portid, $cb) = @_;
143 199
144 my $list = $self->{lmon}{$portid} ||= []; 200 my $list = $self->{lmon}{$portid} ||= [];
145 201
146 $self->send (["", mon1 => $portid]) 202 $self->send (["", mon1 => $portid])
147 unless @$list; 203 unless @$list || !length $portid;
148 204
149 push @$list, $cb; 205 push @$list, $cb;
150} 206}
151 207
152sub unmonitor { 208sub unmonitor {
… …
161 $self->send (["", mon0 => $portid]); 217 $self->send (["", mon0 => $portid]);
162 delete $self->{monitor}{$portid}; 218 delete $self->{monitor}{$portid};
163 } 219 }
164} 220}
165 221
166package AnyEvent::MP::Node::Direct;
167
168use base "AnyEvent::MP::Node::External";
169
170package AnyEvent::MP::Node::Indirect;
171
172use base "AnyEvent::MP::Node::Direct";
173
174sub connect {
175 my ($self) = @_;
176
177 $self->transport_error (transport_error => $self->{noderef}, "unable to connect to indirect node");
178}
179
180package AnyEvent::MP::Node::Self; 222package AnyEvent::MP::Node::Self; # the local node
181 223
182use base "AnyEvent::MP::Node"; 224use base "AnyEvent::MP::Node";
183 225
184sub connect { 226sub connect {
185 # we are trivially connected 227 # we are trivially connected
186} 228}
187 229
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 $DELAY = -50;
241};
242
188sub transport_reset { 243sub transport_reset {
189 my ($self) = @_; 244 my ($self) = @_;
190 245
191 Scalar::Util::weaken $self; 246 Scalar::Util::weaken $self;
192 247
193 $self->{send} = sub { 248 $self->{send} = sub {
249 if (++$DELAY > 0) {
250 my $msg = $_[0];
251 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
252 $DELAY_W ||= AE::timer 0, 0, $send_delayed;
253 return;
254 }
255
194 local $AnyEvent::MP::Kernel::SRCNODE = $self; 256 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
195 AnyEvent::MP::Kernel::_inject (@{ $_[0] }); 257 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
196 }; 258 };
197} 259}
198 260
261sub transport_connect {
262 my ($self, $tp) = @_;
263
264 AE::log 9 => "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})";
265}
266
199sub kill { 267sub kill {
200 my ($self, $port, @reason) = @_; 268 my (undef, @args) = @_;
201 269
202 delete $AnyEvent::MP::Kernel::PORT{$port}; 270 # we _always_ delay kil's, to avoid calling mon callbacks
203 delete $AnyEvent::MP::Kernel::PORT_DATA{$port}; 271 # from anything but the event loop context.
204 272 $DELAY = 1;
205 my $mon = delete $AnyEvent::MP::Kernel::LMON{$port} 273 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
206 or !@reason 274 $DELAY_W ||= AE::timer 0, 0, $send_delayed;
207 or $AnyEvent::MP::Kernel::WARN->("unmonitored local port $port died with reason: @reason");
208
209 $_->(@reason) for values %$mon;
210} 275}
211 276
212sub monitor { 277sub monitor {
213 my ($self, $portid, $cb) = @_; 278 # maybe always delay, too?
214 279 if ($DELAY_W) {
215 return $cb->(no_such_port => "cannot monitor nonexistent port") 280 my @args = @_;
216 unless exists $AnyEvent::MP::Kernel::PORT{$portid}; 281 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
217 282 return;
218 $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb; 283 }
284 &AnyEvent::MP::Kernel::_monitor;
219} 285}
220 286
221sub unmonitor { 287sub unmonitor {
222 my ($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 }
223 294
224 delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0}; 295 &AnyEvent::MP::Kernel::_unmonitor;
225} 296}
226 297
227=head1 SEE ALSO 298=head1 SEE ALSO
228 299
229L<AnyEvent::MP>. 300L<AnyEvent::MP>.

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