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Comparing AnyEvent-MP/MP/Node.pm (file contents):
Revision 1.16 by root, Sun Aug 9 16:08:16 2009 UTC vs.
Revision 1.52 by root, Sat Mar 13 20:29:04 2010 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
11This is an internal utility module, horrible to look at, so don't.
10 12
11=cut 13=cut
12 14
13package AnyEvent::MP::Node; 15package AnyEvent::MP::Node;
14 16
… …
18use AnyEvent::Util (); 20use AnyEvent::Util ();
19use AnyEvent::Socket (); 21use AnyEvent::Socket ();
20 22
21use AnyEvent::MP::Transport (); 23use AnyEvent::MP::Transport ();
22 24
23use base Exporter::;
24
25sub new { 25sub new {
26 my ($class, $noderef) = @_; 26 my ($self, $id) = @_;
27 27
28 bless { noderef => $noderef }, $class 28 $self = bless { id => $id }, $self;
29}
30 29
30 $self->init;
31 $self->transport_reset;
32
33 $self
34}
35
36sub init {
37 #
38}
39
40sub send {
41 &{ shift->{send} }
42}
43
44# nodes reachable via the network
31package AnyEvent::MP::Node::Direct; 45package AnyEvent::MP::Node::External;
32 46
33use base "AnyEvent::MP::Node"; 47use base "AnyEvent::MP::Node";
34 48
35sub send { 49# called at init time, mostly sets {send}
50sub transport_reset {
36 my ($self, $msg) = @_; 51 my ($self) = @_;
37 52
38 if ($self->{transport}) { 53 delete $self->{transport};
39 $self->{transport}->send ($msg); 54
40 } elsif ($self->{queue}) { 55 Scalar::Util::weaken $self;
56
57 $self->{send} = sub {
41 push @{ $self->{queue} }, $msg; 58 push @{$self->{queue}}, shift;
42 } else {
43 $self->{queue} = [$msg];
44 $self->connect; 59 $self->connect;
45 } 60 };
61}
62
63# called each time we fail to establish a connection,
64# or the existing connection failed
65sub transport_error {
66 my ($self, @reason) = @_;
67
68 my $no_transport = !$self->{transport};
69
70 delete $self->{connect_w};
71 delete $self->{connect_to};
72
73 delete $self->{queue};
74 $self->transport_reset;
75
76 if (my $mon = delete $self->{lmon}) {
77 $_->(@reason) for map @$_, values %$mon;
78 }
79
80 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
81 unless $no_transport;
82
83 # if we are here and are idle, we nuke ourselves
84 delete $AnyEvent::MP::Kernel::NODE{$self->{id}}
85 unless $self->{transport} || $self->{connect_to};
86}
87
88# called after handshake was successful
89sub transport_connect {
90 my ($self, $transport) = @_;
91
92 delete $self->{trial};
93
94 $self->transport_error (transport_error => $self->{id}, "switched connections")
95 if $self->{transport};
96
97 delete $self->{connect_addr};
98 delete $self->{connect_w};
99 delete $self->{connect_to};
100
101 $self->{transport} = $transport;
102
103 my $transport_send = $transport->{send};
104
105 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
106
107 $self->{send} = $transport_send;
108
109 $transport_send->($_)
110 for @{ delete $self->{queue} || [] };
111}
112
113sub connect {
114 my ($self, @addresses) = @_;
115
116 return if $self->{transport};
117
118 Scalar::Util::weaken $self;
119
120 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
121
122 $self->{connect_to} ||= AE::timer $monitor, 0, sub {
123 $self->transport_error (transport_error => $self->{id}, "unable to connect");
124 };
125
126 return unless @addresses;
127
128 if ($self->{connect_w}) {
129 # sometimes we get told about new addresses after we started to connect
130 unshift @{$self->{connect_addr}}, @addresses;
131 return;
132 }
133
134 $self->{connect_addr} = \@addresses; # a bit weird, but efficient
135
136 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]");
137
138 my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
139
140 $interval = ($monitor - $interval) / @addresses
141 if ($monitor - $interval) / @addresses < $interval;
142
143 $interval = 0.4 if $interval < 0.4;
144
145 my @endpoints;
146
147 $self->{connect_w} = AE::timer 0.050 * rand, $interval * (0.9 + 0.1 * rand), sub {
148 @endpoints = @addresses
149 unless @endpoints;
150
151 my $endpoint = shift @endpoints;
152
153 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint");
154
155 $self->{trial}{$endpoint} ||= do {
156 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
157 or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");
158
159 AnyEvent::MP::Transport::mp_connect
160 $host, $port,
161 sub { delete $self->{trial}{$endpoint} },
162 };
163 };
46} 164}
47 165
48sub kill { 166sub kill {
49 my ($self, $port, @reason) = @_; 167 my ($self, $port, @reason) = @_;
50 168
… …
55 my ($self, $portid, $cb) = @_; 173 my ($self, $portid, $cb) = @_;
56 174
57 my $list = $self->{lmon}{$portid} ||= []; 175 my $list = $self->{lmon}{$portid} ||= [];
58 176
59 $self->send (["", mon1 => $portid]) 177 $self->send (["", mon1 => $portid])
60 unless @$list; 178 unless @$list || !length $portid;
61 179
62 push @$list, $cb; 180 push @$list, $cb;
63} 181}
64 182
65sub unmonitor { 183sub unmonitor {
… …
74 $self->send (["", mon0 => $portid]); 192 $self->send (["", mon0 => $portid]);
75 delete $self->{monitor}{$portid}; 193 delete $self->{monitor}{$portid};
76 } 194 }
77} 195}
78 196
79sub set_transport { 197# used for direct slave connections as well
80 my ($self, $transport) = @_; 198package AnyEvent::MP::Node::Direct;
81 199
82 $self->clr_transport 200use base "AnyEvent::MP::Node::External";
83 if $self->{transport};
84 201
85 delete $self->{trial}; 202package AnyEvent::MP::Node::Self;
86 delete $self->{retry};
87 delete $self->{next_connect};
88 203
89 $self->{transport} = $transport; 204use base "AnyEvent::MP::Node";
90
91 $transport->send ($_)
92 for @{ delete $self->{queue} || [] };
93}
94
95sub fail {
96 my ($self, @reason) = @_;
97
98 delete $self->{queue};
99
100 if (my $mon = delete $self->{lmon}) {
101 $_->(@reason) for map @$_, values %$mon;
102 }
103}
104
105sub clr_transport {
106 my ($self, @reason) = @_;
107
108 delete $self->{transport};
109 $self->connect;
110}
111 205
112sub connect { 206sub connect {
207 # we are trivially connected
208}
209
210# delay every so often to avoid recursion, also used to delay after spawn
211our $DELAY = -50;
212our @DELAY;
213our $DELAY_W;
214
215sub _send_delayed {
216 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE{""};
217 (shift @DELAY)->()
218 while @DELAY;
219 undef $DELAY_W;
220 $DELAY = -50;
221}
222
223sub transport_reset {
113 my ($self) = @_; 224 my ($self) = @_;
114 225
115 Scalar::Util::weaken $self; 226 Scalar::Util::weaken $self;
116 227
117 $self->{retry} ||= [split /,/, $self->{noderef}]; 228 $self->{send} = sub {
118 229 if ($DELAY++ >= 0) {
119 my $endpoint = shift @{ $self->{retry} }; 230 my $msg = $_[0];
120 231 push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) };
121 if (defined $endpoint) { 232 $DELAY_W ||= AE::timer 0, 0, \&_send_delayed;
122 $self->{trial}{$endpoint} ||= do {
123 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
124 or return $AnyEvent::MP::Base::WARN->("$self->{noderef}: not a resolved node reference.");
125
126 my ($w, $g);
127
128 $w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub {
129 delete $self->{trial}{$endpoint};
130 };
131 $g = AnyEvent::MP::Transport::mp_connect
132 $host, $port,
133 sub {
134 delete $self->{trial}{$endpoint}
135 unless @_;
136 $g = shift;
137 };
138 ; 233 return;
139
140 [$w, \$g]
141 }; 234 }
142 } else { 235
143 $self->fail (transport_error => $self->{noderef}, "unable to connect"); 236 local $AnyEvent::MP::Kernel::SRCNODE = $self;
237 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
144 } 238 };
145
146 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
147 delete $self->{retry};
148 $self->connect;
149 };
150} 239}
151 240
152package AnyEvent::MP::Node::Slave; 241sub transport_connect {
153
154use base "AnyEvent::MP::Node::Direct";
155
156sub connect {
157 my ($self) = @_; 242 my ($self, $tp) = @_;
158 243
159 $self->fail (transport_error => $self->{noderef}, "unable to connect to slave node"); 244 $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})");
160}
161
162package AnyEvent::MP::Node::Self;
163
164use base "AnyEvent::MP::Node";
165
166sub set_transport {
167 Carp::confess "FATAL error, set_transport was called on local node";
168}
169
170sub send {
171 local $AnyEvent::MP::Base::SRCNODE = $_[0];
172 AnyEvent::MP::Base::_inject (@{ $_[1] });
173} 245}
174 246
175sub kill { 247sub kill {
176 my ($self, $port, @reason) = @_; 248 my (undef, @args) = @_;
177 249
178 delete $AnyEvent::MP::Base::PORT{$port}; 250 # we _always_ delay kil's, to avoid calling mon callbacks
179 delete $AnyEvent::MP::Base::PORT_DATA{$port}; 251 # from anything but the event loop context.
180 252 $DELAY = 1;
181 my $mon = delete $AnyEvent::MP::Base::LMON{$port} 253 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
182 or !@reason 254 $DELAY_W ||= AE::timer 0, 0, \&_send_delayed;
183 or $AnyEvent::MP::Base::WARN->("unmonitored local port $port died with reason: @reason");
184
185 $_->(@reason) for values %$mon;
186} 255}
187 256
188sub monitor { 257sub monitor {
189 my ($self, $portid, $cb) = @_; 258 # maybe always delay, too?
190 259 if ($DELAY_W) {
191 return $cb->(no_such_port => "cannot monitor nonexistent port") 260 my @args = @_;
192 unless exists $AnyEvent::MP::Base::PORT{$portid}; 261 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
193 262 return;
194 $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb; 263 }
264 &AnyEvent::MP::Kernel::_monitor;
195} 265}
196 266
197sub unmonitor { 267sub unmonitor {
198 my ($self, $portid, $cb) = @_; 268 # no need to always delay
269 if ($DELAY_W) {
270 my @args = @_;
271 push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) };
272 return;
273 }
199 274
200 delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0}; 275 &AnyEvent::MP::Kernel::_unmonitor;
201} 276}
202 277
203=head1 SEE ALSO 278=head1 SEE ALSO
204 279
205L<AnyEvent>. 280L<AnyEvent::MP>.
206 281
207=head1 AUTHOR 282=head1 AUTHOR
208 283
209 Marc Lehmann <schmorp@schmorp.de> 284 Marc Lehmann <schmorp@schmorp.de>
210 http://home.schmorp.de/ 285 http://home.schmorp.de/

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