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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 1.46 by root, Thu Nov 5 22:44:56 2009 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;
14 16
15use common::sense; 17use common::sense;
16 18
17use AE (); 19use AE ();
20use AnyEvent::Util ();
18use AnyEvent::Socket (); 21use AnyEvent::Socket ();
19 22
20use AnyEvent::MP::Transport (); 23use AnyEvent::MP::Transport ();
21 24
22use base Exporter::; 25sub new {
26 my ($self, $id) = @_;
23 27
24our $VERSION = '0.0'; 28 $self = bless { id => $id }, $self;
25 29
26our $DEFAULT_PORT = "4040"; 30 $self->init;
31 $self->transport_reset;
27 32
28sub normalise_noderef($) { 33 $self
34}
35
36sub init {
37 #
38}
39
40sub send {
41 &{ shift->{send} }
42}
43
44# nodes reachable via the network
45package AnyEvent::MP::Node::External;
46
47use base "AnyEvent::MP::Node";
48
49# called at init time, mostly sets {send}
50sub transport_reset {
29 my ($noderef) = @_; 51 my ($self) = @_;
30 52
31 my $cv = AE::cv; 53 delete $self->{transport};
32 my @res;
33 54
34 $cv->begin (sub { 55 Scalar::Util::weaken $self;
35 my %seen; 56
36 my @refs; 57 $self->{send} = sub {
37 for (sort { $a->[0] <=> $b->[0] } @res) { 58 push @{$self->{queue}}, shift;
38 push @refs, $_->[1] unless $seen{$_->[1]}++ 59 $self->connect;
39 }
40 shift->send (join ",", @refs);
41 }); 60 };
61}
42 62
43 $noderef = $DEFAULT_PORT unless length $noderef; 63# called each time we fail to establish a connection,
64# or the existing connection failed
65sub transport_error {
66 my ($self, @reason) = @_;
44 67
45 my $idx; 68 my $no_transport = !$self->{transport};
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 69
54 $cv->begin; 70 delete $self->{connect_w};
55 AnyEvent::Socket::resolve_sockaddr $nodename, $t || "aemp=$DEFAULT_PORT", "tcp", 0, undef, sub { 71 delete $self->{connect_to};
56 for (@_) {
57 my ($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 72
66# my (undef, undef, undef, undef, @ipv4) = gethostbyname $nodename; 73 delete $self->{queue};
67# 74 $self->transport_reset;
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 75
78 $cv->begin; 76 if (my $mon = delete $self->{lmon}) {
79 AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub { 77 $_->(@reason) for map @$_, values %$mon;
80 for (@_) {
81 my ($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 } 78 }
91 79
92 $cv->end; 80 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
81 unless $no_transport;
93 82
94 $cv 83 # if we are here and are idle, we nuke ourselves
84 delete $AnyEvent::MP::Kernel::NODE{$self->{id}}
85 unless $self->{transport} || $self->{connect_to};
95} 86}
96 87
97sub new { 88# called after handshake was successful
98 my ($class, $noderef) = @_; 89sub transport_connect {
99
100 bless { noderef => $noderef }, $class
101}
102
103package AnyEvent::MP::Node::Direct;
104
105use base "AnyEvent::MP::Node";
106
107sub send {
108 my ($self, $msg) = @_;
109
110 if ($self->{transport}) {
111 $self->{transport}->send ($msg);
112 } elsif ($self->{queue}) {
113 push @{ $self->{queue} }, $msg;
114 } else {
115 $self->{queue} = [$msg];
116 $self->connect;
117 }
118}
119
120sub set_transport {
121 my ($self, $transport) = @_; 90 my ($self, $transport) = @_;
122 91
123 delete $self->{trial}; 92 delete $self->{trial};
93
94 $self->transport_error (transport_error => "switched connections")
95 if $self->{transport};
96
97 delete $self->{connect_addr};
124 delete $self->{next_connect}; 98 delete $self->{connect_w};
99 delete $self->{connect_to};
125 100
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; 101 $self->{transport} = $transport;
102
103 my $transport_send = $transport->can ("send");
104
105 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
106
107 $self->{send} = sub {
108 $transport_send->($transport, $_[0]);
109 };
137 110
138 $transport->send ($_) 111 $transport->send ($_)
139 for @{ delete $self->{queue} || [] }; 112 for @{ delete $self->{queue} || [] };
140} 113}
141 114
142sub clr_transport {
143 my ($self) = @_;
144
145 delete $self->{transport};
146
147 $self->connect;
148}
149
150sub connect { 115sub connect {
151 my ($self) = @_; 116 my ($self, @addresses) = @_;
117
118 return if $self->{transport};
152 119
153 Scalar::Util::weaken $self; 120 Scalar::Util::weaken $self;
154 121
155 unless (exists $self->{n_noderef}) { 122 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
156 return if $self->{n_noderef_}++;
157 (AnyEvent::MP::Node::normalise_noderef ($self->{noderef}))->cb (sub {
158 $self or return;
159 delete $self->{n_noderef_};
160 my $noderef = shift->recv;
161 123
162 $self->{n_noderef} = $noderef; 124 $self->{connect_to} ||= AE::timer $monitor, 0, sub {
125 $self->transport_error (transport_error => $self->{id}, "unable to connect");
126 };
163 127
164 $AnyEvent::MP::Base::NODE{$_} = $self 128 return unless @addresses;
165 for split /,/, $noderef;
166 129
167 $self->connect; 130 if ($self->{connect_w}) {
168 }); 131 # sometimes we get told about new addresses after we started to connect
132 unshift @{$self->{connect_addr}}, @addresses;
169 return; 133 return;
170 } 134 }
171 135
172 $self->{retry} ||= [split /,/, $self->{n_noderef}]; 136 $self->{connect_addr} = \@addresses; # a bit weird, but efficient
173 137
174 my $endpoint = shift @{ $self->{retry} }; 138 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]");
175 139
176 if (defined $endpoint) { 140 my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
141
142 $interval = ($monitor - $interval) / @addresses
143 if ($monitor - $interval) / @addresses < $interval;
144
145 $interval = 0.4 if $interval < 0.4;
146
147 my @endpoints;
148
149 $self->{connect_w} = AE::timer 0.050 * rand, $interval * (0.9 + 0.1 * rand), sub {
150 @endpoints = @addresses
151 unless @endpoints;
152
153 my $endpoint = shift @endpoints;
154
155 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint");
156
177 $self->{trial}{$endpoint} ||= do { 157 $self->{trial}{$endpoint} ||= do {
178 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint 158 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
179 or return; 159 or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");
180 160
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 161 AnyEvent::MP::Transport::mp_connect
187 $host, $port, 162 $host, $port,
188 sub {
189 delete $self->{trial}{$endpoint} 163 sub { delete $self->{trial}{$endpoint} },
190 unless @_;
191 $g = shift;
192 };
193 ;
194
195 [$w, \$g]
196 }; 164 };
197 } else { 165 };
198 delete $self->{retry}; 166}
167
168sub kill {
169 my ($self, $port, @reason) = @_;
170
171 $self->send (["", kil => $port, @reason]);
172}
173
174sub monitor {
175 my ($self, $portid, $cb) = @_;
176
177 my $list = $self->{lmon}{$portid} ||= [];
178
179 $self->send (["", mon1 => $portid])
180 unless @$list || !length $portid;
181
182 push @$list, $cb;
183}
184
185sub unmonitor {
186 my ($self, $portid, $cb) = @_;
187
188 my $list = $self->{lmon}{$portid}
189 or return;
190
191 @$list = grep $_ != $cb, @$list;
192
193 unless (@$list) {
194 $self->send (["", mon0 => $portid]);
195 delete $self->{monitor}{$portid};
199 } 196 }
200
201 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
202 $self->connect;
203 };
204} 197}
198
199# used for direct slave connections as well
200package AnyEvent::MP::Node::Direct;
201
202use base "AnyEvent::MP::Node::External";
205 203
206package AnyEvent::MP::Node::Self; 204package AnyEvent::MP::Node::Self;
207 205
208use base "AnyEvent::MP::Node"; 206use base "AnyEvent::MP::Node";
209 207
208sub connect {
209 # we are trivially connected
210}
211
212# delay every so often to avoid recursion, also used to delay after spawn
213our $DELAY = -50;
214our @DELAY;
215our $DELAY_W;
216
217sub _send_delayed {
218 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE{""};
219 (shift @DELAY)->()
220 while @DELAY;
221 undef $DELAY_W;
222 $DELAY = -50;
223}
224
210sub set_transport { 225sub transport_reset {
211 die "FATAL error, set_transport was called"; 226 my ($self) = @_;
212}
213 227
214sub send { 228 Scalar::Util::weaken $self;
229
230 $self->{send} = sub {
231 if ($DELAY++ >= 0) {
232 my $msg = $_[0];
233 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
234 $DELAY_W ||= AE::timer 0, 0, \&_send_delayed;
235 return;
236 }
237
238 local $AnyEvent::MP::Kernel::SRCNODE = $self;
215 AnyEvent::MP::Base::_inject ($_[1]); 239 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
240 };
241}
242
243sub transport_connect {
244 my ($self, $tp) = @_;
245
246 $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})");
247}
248
249sub kill {
250 my ($self, $port, @reason) = @_;
251
252 my $delay_cb = sub {
253 delete $AnyEvent::MP::Kernel::PORT{$port}
254 or return; # killing nonexistent ports is O.K.
255 delete $AnyEvent::MP::Kernel::PORT_DATA{$port};
256
257 my $mon = delete $AnyEvent::MP::Kernel::LMON{$port}
258 or !@reason
259 or $AnyEvent::MP::Kernel::WARN->(8, "unmonitored local port $port died with reason: @reason");
260
261 $_->(@reason) for values %$mon;
262 };
263
264 # we _always_ delay kil's, to avoid calling mon callbacks
265 # from anything but the event loop context.
266 $DELAY = 1;
267 push @DELAY, $delay_cb;
268 $DELAY_W ||= AE::timer 0, 0, \&_send_delayed;
269}
270
271sub monitor {
272 my ($self, $portid, $cb) = @_;
273
274 my $delay_cb = sub {
275 return $cb->(no_such_port => "cannot monitor nonexistent port", "$self->{id}#$portid")
276 unless exists $AnyEvent::MP::Kernel::PORT{$portid};
277
278 $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb;
279 };
280
281 $DELAY_W ? push @DELAY, $delay_cb : &$delay_cb;
282}
283
284sub unmonitor {
285 my ($self, $portid, $cb) = @_;
286
287 my $delay_cb = sub {
288 delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0};
289 };
290
291 $DELAY_W ? push @DELAY, $delay_cb : &$delay_cb;
216} 292}
217 293
218=head1 SEE ALSO 294=head1 SEE ALSO
219 295
220L<AnyEvent>. 296L<AnyEvent::MP>.
221 297
222=head1 AUTHOR 298=head1 AUTHOR
223 299
224 Marc Lehmann <schmorp@schmorp.de> 300 Marc Lehmann <schmorp@schmorp.de>
225 http://home.schmorp.de/ 301 http://home.schmorp.de/

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