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Comparing AnyEvent-MP/MP/Node.pm (file contents):
Revision 1.5 by root, Sun Aug 2 14:44:37 2009 UTC vs.
Revision 1.69 by root, Sun Aug 28 14:49:44 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 (); 19use AnyEvent ();
18use AnyEvent::Socket (); 20use AnyEvent::Socket ();
19 21
20use AnyEvent::MP::Transport (); 22use AnyEvent::MP::Transport ();
21 23
22use base Exporter::;
23
24our $VERSION = '0.0';
25
26our $DEFAULT_PORT = "4040";
27
28sub normalise_noderef($) {
29 my ($noderef) = @_;
30
31 my $cv = AE::cv;
32 my @res;
33
34 $cv->begin (sub {
35 my %seen;
36 my @refs;
37 for (sort { $a->[0] <=> $b->[0] } @res) {
38 push @refs, $_->[1] unless $seen{$_->[1]}++
39 }
40 shift->send (join ",", @refs);
41 });
42
43 $noderef = $DEFAULT_PORT unless length $noderef;
44
45 my $idx;
46 for my $t (split /,/, $noderef) {
47 my $pri = ++$idx;
48
49 #TODO: this should be outside normalise_noderef and in become_public
50 if ($t =~ /^\d*$/) {
51 require POSIX;
52 my $nodename = (POSIX::uname ())[1];
53
54 $cv->begin;
55 AnyEvent::Socket::resolve_sockaddr $nodename, $t || "aemp=$DEFAULT_PORT", "tcp", 0, undef, sub {
56 for (@_) {
57 my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3];
58 push @res, [
59 $pri += 1e-5,
60 AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service
61 ];
62 }
63 $cv->end;
64 };
65
66# my (undef, undef, undef, undef, @ipv4) = gethostbyname $nodename;
67#
68# for (@ipv4) {
69# push @res, [
70# $pri,
71# AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $_, $t || $DEFAULT_PORT,
72# ];
73# }
74 } else {
75 my ($host, $port) = AnyEvent::Socket::parse_hostport $t, "aemp=$DEFAULT_PORT"
76 or Carp::croak "$t: unparsable transport descriptor";
77
78 $cv->begin;
79 AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub {
80 for (@_) {
81 my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3];
82 push @res, [
83 $pri += 1e-5,
84 AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service
85 ];
86 }
87 $cv->end;
88 }
89 }
90 }
91
92 $cv->end;
93
94 $cv
95}
96
97sub new { 24sub new {
98 my ($class, $noderef) = @_; 25 my ($self, $id) = @_;
99 26
100 bless { noderef => $noderef }, $class 27 $self = bless { id => $id }, $self;
101}
102 28
103package 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
104 53
105use base "AnyEvent::MP::Node"; 54use base "AnyEvent::MP::Node";
106 55
107sub send { 56# called at init time, mostly sets {send}
57sub transport_reset {
108 my ($self, $msg) = @_; 58 my ($self) = @_;
109 59
110 if ($self->{transport}) { 60 delete $self->{transport};
111 $self->{transport}->send ($msg); 61
112 } elsif ($self->{queue}) { 62 Scalar::Util::weaken $self;
63
64 $self->{send} = sub {
113 push @{ $self->{queue} }, $msg; 65 push @{$self->{queue}}, shift;
114 } else {
115 $self->{queue} = [$msg];
116 $self->connect; 66 $self->connect;
117 } 67 };
118} 68}
119 69
70# called each time we fail to establish a connection,
71# or the existing connection failed
120sub set_transport { 72sub transport_error {
73 my ($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 $self->{connect_to};
93
94 AE::log 9 => "@reason";
95}
96
97# called after handshake was successful
98sub transport_connect {
121 my ($self, $transport) = @_; 99 my ($self, $transport) = @_;
122 100
123 delete $self->{trial}; 101 delete $self->{trial};
102
103 $self->transport_error (transport_error => $self->{id}, "switched connections")
104 if $self->{transport};
105
124 delete $self->{next_connect}; 106 delete $self->{connect_w};
107 delete $self->{connect_to};
125 108
126 if (
127 exists $self->{remote_uniq}
128 && $self->{remote_uniq} ne $transport->{remote_uniq}
129 ) {
130 # uniq changed, drop queue
131 delete $self->{queue};
132 #TODO: "DOWN"
133 }
134
135 $self->{remote_uniq} = $transport->{remote_uniq};
136 $self->{transport} = $transport; 109 $self->{transport} = $transport;
137 110
111 my $transport_send = $transport->{send};
112
113 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
114
115 $self->{send} = $transport_send;
116
138 $transport->send ($_) 117 $transport_send->($_)
139 for @{ delete $self->{queue} || [] }; 118 for @{ delete $self->{queue} || [] };
140}
141
142sub clr_transport {
143 my ($self) = @_;
144
145 delete $self->{transport};
146
147 $self->connect;
148} 119}
149 120
150sub connect { 121sub connect {
151 my ($self) = @_; 122 my ($self) = @_;
152 123
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
153 Scalar::Util::weaken $self; 131 Scalar::Util::weaken $self;
154 132
155 unless (exists $self->{n_noderef}) { 133 $self->{connect_to} ||= AE::timer $AnyEvent::MP::Kernel::CONFIG->{connect_interval}, 0, sub {
156 return if $self->{n_noderef_}++; 134 $self->transport_error (transport_error => $self->{id}, "connect timeout");
157 (AnyEvent::MP::Node::normalise_noderef ($self->{noderef}))->cb (sub { 135 };
158 $self or return;
159 delete $self->{n_noderef_};
160 my $noderef = shift->recv;
161 136
162 $self->{n_noderef} = $noderef; 137 # maybe @$addresses?
138 my $addresses = $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}};
163 139
164 $AnyEvent::MP::Base::NODE{$_} = $self 140 if ($addresses) {
165 for split /,/, $noderef; 141 $self->connect_to ($addresses);
166 142 } else {
167 $self->connect; 143 # on global nodes, all bets are off now - we either know the node, or we don't
144 if ($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});
168 }); 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");
169 return; 160 return;
170 } 161 }
162
163 AE::log 9 => "connecting to $self->{id} with [@$addresses]";
171 164
172 $self->{retry} ||= [split /,/, $self->{n_noderef}]; 165 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
166 my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
173 167
174 my $endpoint = shift @{ $self->{retry} }; 168 $interval = ($monitor - $interval) / @$addresses
169 if ($monitor - $interval) / @$addresses < $interval;
175 170
176 if (defined $endpoint) { 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;
178
179 AE::log 9 => "connecting to $self->{id} at $endpoint";
180
177 $self->{trial}{$endpoint} ||= do { 181 $self->{trial}{$endpoint} ||= do {
178 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint 182 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
179 or return; 183 or return AE::log critical => "$self->{id}: '$endpoint' is not a resolved node reference.";
180 184
181 my ($w, $g);
182
183 $w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub {
184 delete $self->{trial}{$endpoint};
185 };
186 $g = AnyEvent::MP::Transport::mp_connect 185 AnyEvent::MP::Transport::mp_connect
187 $host, $port, 186 $host, $port,
188 sub {
189 delete $self->{trial}{$endpoint} 187 sub { delete $self->{trial}{$endpoint} },
190 unless @_;
191 $g = shift;
192 };
193 ;
194
195 [$w, \$g]
196 }; 188 };
197 } else {
198 delete $self->{retry};
199 }
200
201 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
202 $self->connect;
203 }; 189 };
204} 190}
205 191
192sub kill {
193 my ($self, $port, @reason) = @_;
194
195 $self->{send} (["", kil1 => $port, @reason]);
196}
197
198sub monitor {
199 my ($self, $portid, $cb) = @_;
200
201 my $list = $self->{lmon}{$portid} ||= [];
202
203 $self->send (["", mon1 => $portid])
204 unless @$list || !length $portid;
205
206 push @$list, $cb;
207}
208
209sub unmonitor {
210 my ($self, $portid, $cb) = @_;
211
212 my $list = $self->{lmon}{$portid}
213 or return;
214
215 @$list = grep $_ != $cb, @$list;
216
217 unless (@$list) {
218 $self->send (["", mon0 => $portid]);
219 delete $self->{monitor}{$portid};
220 }
221}
222
206package AnyEvent::MP::Node::Self; 223package AnyEvent::MP::Node::Self; # the local node
207 224
208use base "AnyEvent::MP::Node"; 225use base "AnyEvent::MP::Node";
209 226
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 $DELAY = -50;
242};
243
210sub set_transport { 244sub transport_reset {
211 die "FATAL error, set_transport was called"; 245 my ($self) = @_;
212}
213 246
214sub send { 247 Scalar::Util::weaken $self;
248
249 $self->{send} = sub {
250 if (++$DELAY > 0) {
251 my $msg = $_[0];
252 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
253 $DELAY_W ||= AE::timer 0, 0, $send_delayed;
254 return;
255 }
256
257 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
215 AnyEvent::MP::Base::_inject ($_[1]); 258 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
259 };
260}
261
262sub transport_connect {
263 my ($self, $tp) = @_;
264
265 AE::log 9 => "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})";
266}
267
268sub kill {
269 my (undef, @args) = @_;
270
271 # we _always_ delay kil's, to avoid calling mon callbacks
272 # from anything but the event loop context.
273 $DELAY = 1;
274 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
275 $DELAY_W ||= AE::timer 0, 0, $send_delayed;
276}
277
278sub monitor {
279 # maybe always delay, too?
280 if ($DELAY_W) {
281 my @args = @_;
282 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
283 return;
284 }
285 &AnyEvent::MP::Kernel::_monitor;
286}
287
288sub unmonitor {
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 }
295
296 &AnyEvent::MP::Kernel::_unmonitor;
216} 297}
217 298
218=head1 SEE ALSO 299=head1 SEE ALSO
219 300
220L<AnyEvent>. 301L<AnyEvent::MP>.
221 302
222=head1 AUTHOR 303=head1 AUTHOR
223 304
224 Marc Lehmann <schmorp@schmorp.de> 305 Marc Lehmann <schmorp@schmorp.de>
225 http://home.schmorp.de/ 306 http://home.schmorp.de/

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