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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 1.65 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 (); 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 $self->init;
30 $self->transport_reset;
31
32 $self
33}
34
35sub init {
36 #
37}
38
39sub send {
40 &{ shift->{send} }
41}
42
43# nodes reachable via the network
44package AnyEvent::MP::Node::Remote; # a remote node
104 45
105use base "AnyEvent::MP::Node"; 46use base "AnyEvent::MP::Node";
106 47
107sub send { 48# called at init time, mostly sets {send}
49sub transport_reset {
108 my ($self, $msg) = @_; 50 my ($self) = @_;
109 51
110 if ($self->{transport}) { 52 delete $self->{transport};
111 $self->{transport}->send ($msg); 53
112 } elsif ($self->{queue}) { 54 Scalar::Util::weaken $self;
55
56 $self->{send} = sub {
113 push @{ $self->{queue} }, $msg; 57 push @{$self->{queue}}, shift;
114 } else {
115 $self->{queue} = [$msg];
116 $self->connect; 58 $self->connect;
117 } 59 };
118} 60}
119 61
62# called each time we fail to establish a connection,
63# or the existing connection failed
120sub set_transport { 64sub transport_error {
65 my ($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} || $self->{connect_to};
85}
86
87# called after handshake was successful
88sub transport_connect {
121 my ($self, $transport) = @_; 89 my ($self, $transport) = @_;
122 90
123 delete $self->{trial}; 91 delete $self->{trial};
92
93 $self->transport_error (transport_error => $self->{id}, "switched connections")
94 if $self->{transport};
95
124 delete $self->{next_connect}; 96 delete $self->{connect_w};
97 delete $self->{connect_to};
125 98
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; 99 $self->{transport} = $transport;
137 100
101 my $transport_send = $transport->{send};
102
103 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
104
105 $self->{send} = $transport_send;
106
138 $transport->send ($_) 107 $transport_send->($_)
139 for @{ delete $self->{queue} || [] }; 108 for @{ delete $self->{queue} || [] };
140}
141
142sub clr_transport {
143 my ($self) = @_;
144
145 delete $self->{transport};
146
147 $self->connect;
148} 109}
149 110
150sub connect { 111sub connect {
151 my ($self) = @_; 112 my ($self) = @_;
152 113
114 return if $self->{transport};
115 return if $self->{connect_w};
116
153 Scalar::Util::weaken $self; 117 Scalar::Util::weaken $self;
154 118
155 unless (exists $self->{n_noderef}) { 119 $self->{connect_to} ||= AE::timer $AnyEvent::MP::Kernel::CONFIG->{connect_interval}, 0, sub {
156 return if $self->{n_noderef_}++; 120 $self->transport_error (transport_error => $self->{id}, "unable to connect");
157 (AnyEvent::MP::Node::normalise_noderef ($self->{noderef}))->cb (sub {
158 $self or return;
159 delete $self->{n_noderef_};
160 my $noderef = shift->recv;
161
162 $self->{n_noderef} = $noderef;
163
164 $AnyEvent::MP::Base::NODE{$_} = $self
165 for split /,/, $noderef;
166
167 $self->connect;
168 });
169 return;
170 } 121 };
171 122
172 $self->{retry} ||= [split /,/, $self->{n_noderef}]; 123 # maybe @$addresses?
124 my $addresses = $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}};
173 125
174 my $endpoint = shift @{ $self->{retry} }; 126 if ($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});
132 }
133 }
134}
175 135
176 if (defined $endpoint) { 136sub connect_to {
137 my ($self, $addresses) = @_;
138
139 return if $self->{transport};
140 return if $self->{connect_w};
141
142 return unless @$addresses;
143
144 AE::log 9 => "connecting to $self->{id} with [@$addresses]";
145
146 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
147 my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
148
149 $interval = ($monitor - $interval) / @$addresses
150 if ($monitor - $interval) / @$addresses < $interval;
151
152 $interval = 0.4 if $interval < 0.4;
153
154 my @endpoints = reverse @$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
177 $self->{trial}{$endpoint} ||= do { 161 $self->{trial}{$endpoint} ||= do {
178 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint 162 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
179 or return; 163 or return AE::log critical => "$self->{id}: '$endpoint' is not a resolved node reference.";
180 164
181 my ($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 165 AnyEvent::MP::Transport::mp_connect
187 $host, $port, 166 $host, $port,
188 sub {
189 delete $self->{trial}{$endpoint} 167 sub { delete $self->{trial}{$endpoint} },
190 unless @_;
191 $g = shift;
192 };
193 ;
194
195 [$w, \$g]
196 }; 168 };
197 } else {
198 delete $self->{retry};
199 } 169 };
170}
200 171
201 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub { 172sub kill {
202 $self->connect; 173 my ($self, $port, @reason) = @_;
174
175 $self->{send} (["", kil => $port, @reason]);
176}
177
178sub monitor {
179 my ($self, $portid, $cb) = @_;
180
181 my $list = $self->{lmon}{$portid} ||= [];
182
183 $self->send (["", mon1 => $portid])
184 unless @$list || !length $portid;
185
186 push @$list, $cb;
187}
188
189sub unmonitor {
190 my ($self, $portid, $cb) = @_;
191
192 my $list = $self->{lmon}{$portid}
193 or return;
194
195 @$list = grep $_ != $cb, @$list;
196
197 unless (@$list) {
198 $self->send (["", mon0 => $portid]);
199 delete $self->{monitor}{$portid};
203 }; 200 }
204} 201}
205 202
206package AnyEvent::MP::Node::Self; 203package AnyEvent::MP::Node::Self; # the local node
207 204
208use base "AnyEvent::MP::Node"; 205use base "AnyEvent::MP::Node";
209 206
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 $DELAY = -50;
222};
223
210sub set_transport { 224sub transport_reset {
211 die "FATAL error, set_transport was called"; 225 my ($self) = @_;
212}
213 226
214sub send { 227 Scalar::Util::weaken $self;
228
229 $self->{send} = sub {
230 if (++$DELAY > 0) {
231 my $msg = $_[0];
232 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
233 $DELAY_W ||= AE::timer 0, 0, $send_delayed;
234 return;
235 }
236
237 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
215 AnyEvent::MP::Base::_inject ($_[1]); 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) };
263 return;
264 }
265 &AnyEvent::MP::Kernel::_monitor;
266}
267
268sub unmonitor {
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 }
275
276 &AnyEvent::MP::Kernel::_unmonitor;
216} 277}
217 278
218=head1 SEE ALSO 279=head1 SEE ALSO
219 280
220L<AnyEvent>. 281L<AnyEvent::MP>.
221 282
222=head1 AUTHOR 283=head1 AUTHOR
223 284
224 Marc Lehmann <schmorp@schmorp.de> 285 Marc Lehmann <schmorp@schmorp.de>
225 http://home.schmorp.de/ 286 http://home.schmorp.de/

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