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Comparing AnyEvent-MP/MP/Node.pm (file contents):
Revision 1.6 by root, Mon Aug 3 21:35:03 2009 UTC vs.
Revision 1.65 by root, Fri Mar 23 21:16:36 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 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
23use base Exporter::; 24sub new {
25 my ($self, $id) = @_;
24 26
25our $VERSION = '0.0'; 27 $self = bless { id => $id }, $self;
26 28
27our $DEFAULT_PORT = "4040"; 29 $self->init;
30 $self->transport_reset;
28 31
29sub normalise_noderef($) { 32 $self
33}
34
35sub init {
36 #
37}
38
39sub send {
40 &{ shift->{send} }
41}
42
43# nodes reachable via the network
44package AnyEvent::MP::Node::Remote; # a remote node
45
46use base "AnyEvent::MP::Node";
47
48# called at init time, mostly sets {send}
49sub transport_reset {
30 my ($noderef) = @_; 50 my ($self) = @_;
31 51
32 my $cv = AE::cv; 52 delete $self->{transport};
33 my @res;
34 53
35 $cv->begin (sub { 54 Scalar::Util::weaken $self;
36 my %seen; 55
37 my @refs; 56 $self->{send} = sub {
38 for (sort { $a->[0] <=> $b->[0] } @res) { 57 push @{$self->{queue}}, shift;
39 push @refs, $_->[1] unless $seen{$_->[1]}++ 58 $self->connect;
59 };
60}
61
62# called each time we fail to establish a connection,
63# or the existing connection failed
64sub transport_error {
65 my ($self, @reason) = @_;
66
67 my $no_transport = !$self->{transport};
68
69 delete $self->{connect_w};
70 delete $self->{connect_to};
71
72 delete $self->{queue};
73 $self->transport_reset;
74
75 if (my $mon = delete $self->{lmon}) {
76 $_->(@reason) for map @$_, values %$mon;
77 }
78
79 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
80 unless $no_transport;
81
82 # if we are here and are idle, we nuke ourselves
83 delete $AnyEvent::MP::Kernel::NODE{$self->{id}}
84 unless $self->{transport} || $self->{connect_to};
85}
86
87# called after handshake was successful
88sub transport_connect {
89 my ($self, $transport) = @_;
90
91 delete $self->{trial};
92
93 $self->transport_error (transport_error => $self->{id}, "switched connections")
94 if $self->{transport};
95
96 delete $self->{connect_w};
97 delete $self->{connect_to};
98
99 $self->{transport} = $transport;
100
101 my $transport_send = $transport->{send};
102
103 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
104
105 $self->{send} = $transport_send;
106
107 $transport_send->($_)
108 for @{ delete $self->{queue} || [] };
109}
110
111sub connect {
112 my ($self) = @_;
113
114 return if $self->{transport};
115 return if $self->{connect_w};
116
117 Scalar::Util::weaken $self;
118
119 $self->{connect_to} ||= AE::timer $AnyEvent::MP::Kernel::CONFIG->{connect_interval}, 0, sub {
120 $self->transport_error (transport_error => $self->{id}, "unable to connect");
121 };
122
123 # maybe @$addresses?
124 my $addresses = $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}};
125
126 if ($addresses) {
127 $self->connect_to ($addresses);
128 } else {
129 # on global nodes, all bets are off now - we either know the node, or we don't
130 unless ($AnyEvent::MP::Kernel::GLOBAL) {
131 AnyEvent::MP::Kernel::g_find ($self->{id});
40 } 132 }
41 shift->send (join ",", @refs);
42 }); 133 }
134}
43 135
44 $noderef = $DEFAULT_PORT unless length $noderef; 136sub connect_to {
137 my ($self, $addresses) = @_;
45 138
46 my $idx; 139 return if $self->{transport};
47 for my $t (split /,/, $noderef) { 140 return if $self->{connect_w};
48 my $pri = ++$idx;
49
50 #TODO: this should be outside normalise_noderef and in become_public
51 if ($t =~ /^\d*$/) {
52 require POSIX;
53 my $nodename = (POSIX::uname ())[1];
54 141
55 $cv->begin; 142 return unless @$addresses;
56 AnyEvent::Socket::resolve_sockaddr $nodename, $t || "aemp=$DEFAULT_PORT", "tcp", 0, undef, sub { 143
57 for (@_) { 144 AE::log 9 => "connecting to $self->{id} with [@$addresses]";
58 my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3];
59 push @res, [
60 $pri += 1e-5,
61 AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service
62 ];
63 }
64 $cv->end;
65 };
66 145
67# my (undef, undef, undef, undef, @ipv4) = gethostbyname $nodename; 146 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
68# 147 my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
69# for (@ipv4) { 148
70# push @res, [ 149 $interval = ($monitor - $interval) / @$addresses
71# $pri, 150 if ($monitor - $interval) / @$addresses < $interval;
72# AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $_, $t || $DEFAULT_PORT, 151
73# ]; 152 $interval = 0.4 if $interval < 0.4;
74# } 153
75 } else { 154 my @endpoints = reverse @$addresses;
155
156 $self->{connect_w} = AE::timer 0, $interval * (0.9 + 0.1 * rand), sub {
157 my $endpoint = pop @endpoints;
158
159 AE::log 9 => "connecting to $self->{id} at $endpoint";
160
161 $self->{trial}{$endpoint} ||= do {
76 my ($host, $port) = AnyEvent::Socket::parse_hostport $t, "aemp=$DEFAULT_PORT" 162 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
77 or Carp::croak "$t: unparsable transport descriptor"; 163 or return AE::log critical => "$self->{id}: '$endpoint' is not a resolved node reference.";
78 164
79 $cv->begin; 165 AnyEvent::MP::Transport::mp_connect
80 AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub { 166 $host, $port,
81 for (@_) { 167 sub { delete $self->{trial}{$endpoint} },
82 my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3];
83 push @res, [
84 $pri += 1e-5,
85 AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service
86 ];
87 }
88 $cv->end;
89 }
90 } 168 };
91 } 169 };
92
93 $cv->end;
94
95 $cv
96} 170}
97 171
98sub new { 172sub kill {
99 my ($class, $noderef) = @_;
100
101 bless { noderef => $noderef }, $class
102}
103
104package AnyEvent::MP::Node::Direct;
105
106use base "AnyEvent::MP::Node";
107
108sub send {
109 my ($self, $msg) = @_; 173 my ($self, $port, @reason) = @_;
110 174
111 if ($self->{transport}) { 175 $self->{send} (["", kil => $port, @reason]);
112 $self->{transport}->send ($msg);
113 } elsif ($self->{queue}) {
114 push @{ $self->{queue} }, $msg;
115 } else {
116 $self->{queue} = [$msg];
117 $self->connect;
118 }
119} 176}
120 177
121sub monitor { 178sub monitor {
122 my ($self, $portid, $cb) = @_; 179 my ($self, $portid, $cb) = @_;
123 180
124 return $cb->()
125 if $self->{failed};
126
127 my $list = $self->{lmon}{$portid} ||= []; 181 my $list = $self->{lmon}{$portid} ||= [];
128 182
129 $self->send (["", mon1 => $portid]) 183 $self->send (["", mon1 => $portid])
130 unless @$list; 184 unless @$list || !length $portid;
131 185
132 push @$list, $cb; 186 push @$list, $cb;
133} 187}
134 188
135sub unmonitor { 189sub unmonitor {
… …
144 $self->send (["", mon0 => $portid]); 198 $self->send (["", mon0 => $portid]);
145 delete $self->{monitor}{$portid}; 199 delete $self->{monitor}{$portid};
146 } 200 }
147} 201}
148 202
203package AnyEvent::MP::Node::Self; # the local node
204
205use base "AnyEvent::MP::Node";
206
207sub connect {
208 # we are trivially connected
209}
210
211# delay every so often to avoid recursion, also used to delay after spawn
212our $DELAY = -50;
213our @DELAY;
214our $DELAY_W;
215
216our $send_delayed = sub {
217 $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
218 (shift @DELAY)->()
219 while @DELAY;
220 undef $DELAY_W;
221 $DELAY = -50;
222};
223
149sub set_transport { 224sub transport_reset {
150 my ($self, $transport) = @_;
151
152 $self->clr_transport
153 if $self->{transport};
154
155 delete $self->{trial};
156 delete $self->{next_connect};
157 delete $self->{failed};
158
159 if (
160 exists $self->{remote_uniq}
161 && $self->{remote_uniq} ne $transport->{remote_uniq}
162 ) {
163 # uniq changed, drop queue
164 delete $self->{queue};
165 #TODO: "DOWN"
166 }
167
168 $self->{remote_uniq} = $transport->{remote_uniq};
169 $self->{transport} = $transport;
170
171 $transport->send ($_)
172 for @{ delete $self->{queue} || [] };
173}
174
175sub clr_transport {
176 my ($self) = @_; 225 my ($self) = @_;
177 226
178 delete $self->{transport};
179 $self->{failed} = 1;
180
181 if (my $mon = delete $self->{monitor}) {
182 $_->() for map @$_, values %$mon;
183 }
184
185 $self->connect;
186}
187
188sub connect {
189 my ($self) = @_;
190
191 Scalar::Util::weaken $self; 227 Scalar::Util::weaken $self;
192 228
193 unless (exists $self->{n_noderef}) { 229 $self->{send} = sub {
194 return if $self->{n_noderef_}++; 230 if (++$DELAY > 0) {
195 (AnyEvent::MP::Node::normalise_noderef ($self->{noderef}))->cb (sub { 231 my $msg = $_[0];
232 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
233 $DELAY_W ||= AE::timer 0, 0, $send_delayed;
196 $self or return; 234 return;
197 delete $self->{n_noderef_};
198 my $noderef = shift->recv;
199
200 $self->{n_noderef} = $noderef;
201
202 $AnyEvent::MP::Base::NODE{$_} = $self
203 for split /,/, $noderef;
204
205 $self->connect;
206 }); 235 }
236
237 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
238 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
239 };
240}
241
242sub transport_connect {
243 my ($self, $tp) = @_;
244
245 AE::log 9 => "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})";
246}
247
248sub kill {
249 my (undef, @args) = @_;
250
251 # we _always_ delay kil's, to avoid calling mon callbacks
252 # from anything but the event loop context.
253 $DELAY = 1;
254 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
255 $DELAY_W ||= AE::timer 0, 0, $send_delayed;
256}
257
258sub monitor {
259 # maybe always delay, too?
260 if ($DELAY_W) {
261 my @args = @_;
262 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
207 return; 263 return;
208 } 264 }
209 265 &AnyEvent::MP::Kernel::_monitor;
210 $self->{retry} ||= [split /,/, $self->{n_noderef}];
211
212 my $endpoint = shift @{ $self->{retry} };
213
214 if (defined $endpoint) {
215 $self->{trial}{$endpoint} ||= do {
216 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
217 or return;
218
219 my ($w, $g);
220
221 $w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub {
222 delete $self->{trial}{$endpoint};
223 };
224 $g = AnyEvent::MP::Transport::mp_connect
225 $host, $port,
226 sub {
227 delete $self->{trial}{$endpoint}
228 unless @_;
229 $g = shift;
230 };
231 ;
232
233 [$w, \$g]
234 };
235 } else {
236 delete $self->{retry};
237 }
238
239 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
240 $self->connect;
241 };
242}
243
244package AnyEvent::MP::Node::Self;
245
246use base "AnyEvent::MP::Node";
247
248sub set_transport {
249 die "FATAL error, set_transport was called";
250}
251
252sub send {
253 local $AnyEvent::MP::Base::SRCNODE = $_[0];
254 AnyEvent::MP::Base::_inject (@{ $_[1] });
255}
256
257sub monitor {
258 my ($self, $portid, $cb) = @_;
259
260 return $cb->()
261 unless exists $AnyEvent::MP::Base::PORT{$portid};
262
263 $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb;
264} 266}
265 267
266sub unmonitor { 268sub unmonitor {
267 my ($self, $portid, $cb) = @_; 269 # no need to always delay
270 if ($DELAY_W) {
271 my @args = @_;
272 push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) };
273 return;
274 }
268 275
269 delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0}; 276 &AnyEvent::MP::Kernel::_unmonitor;
270} 277}
271 278
272=head1 SEE ALSO 279=head1 SEE ALSO
273 280
274L<AnyEvent>. 281L<AnyEvent::MP>.
275 282
276=head1 AUTHOR 283=head1 AUTHOR
277 284
278 Marc Lehmann <schmorp@schmorp.de> 285 Marc Lehmann <schmorp@schmorp.de>
279 http://home.schmorp.de/ 286 http://home.schmorp.de/

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