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Comparing AnyEvent-MP/MP/Node.pm (file contents):
Revision 1.27 by root, Thu Aug 27 07:12:48 2009 UTC vs.
Revision 1.68 by root, Sun Aug 28 09:39:23 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 ();
18use AnyEvent::Util (); 19use AnyEvent ();
19use AnyEvent::Socket (); 20use AnyEvent::Socket ();
20 21
21use AnyEvent::MP::Transport (); 22use AnyEvent::MP::Transport ();
22 23
23sub new { 24sub new {
24 my ($self, $noderef) = @_; 25 my ($self, $id) = @_;
25 26
26 $self = bless { noderef => $noderef }, $self; 27 $self = bless { id => $id }, $self;
28
29 # register
30 $AnyEvent::MP::Kernel::NODE{$id} = $self;
27 31
28 $self->init; 32 $self->init;
29 $self->transport_reset; 33 $self->transport_reset;
30 34
31 $self 35 $self
32} 36}
33 37
38sub DESTROY {
39 # unregister
40 delete $AnyEvent::MP::Kernel::NODE{$_[0]{id}};
41}
42
34sub init { 43sub init {
35 # 44 #
36} 45}
37 46
38sub send { 47sub send {
39 &{ shift->{send} } 48 &{ shift->{send} }
40} 49}
41 50
42# nodes reachable via the network 51# nodes reachable via the network
43package AnyEvent::MP::Node::External; 52package AnyEvent::MP::Node::Remote; # a remote node
44 53
45use base "AnyEvent::MP::Node"; 54use base "AnyEvent::MP::Node";
46 55
47# called at init time, mostly sets {send} 56# called at init time, mostly sets {send}
48sub transport_reset { 57sub transport_reset {
… …
54 63
55 $self->{send} = sub { 64 $self->{send} = sub {
56 push @{$self->{queue}}, shift; 65 push @{$self->{queue}}, shift;
57 $self->connect; 66 $self->connect;
58 }; 67 };
59
60 $self->connect
61 if $self->{autoconnect};
62} 68}
63 69
64# called only after successful handshake 70# called each time we fail to establish a connection,
71# or the existing connection failed
65sub transport_error { 72sub transport_error {
66 my ($self, @reason) = @_; 73 my ($self, @reason) = @_;
67 74
68 my $no_transport = !$self->{transport}; 75 my $no_transport = !$self->{transport};
69 76
… …
71 delete $self->{connect_to}; 78 delete $self->{connect_to};
72 79
73 delete $self->{queue}; 80 delete $self->{queue};
74 $self->transport_reset; 81 $self->transport_reset;
75 82
83 if (my $mon = delete $self->{lmon}) {
84 $_->(@reason) for map @$_, values %$mon;
85 }
86
76 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason) 87 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
77 unless $no_transport; 88 unless $no_transport;
78 89
79 if (my $mon = delete $self->{lmon}) { 90 # we weaken the node reference, so it can go away if unused
80 $_->(@reason) for map @$_, values %$mon; 91 Scalar::Util::weaken $AnyEvent::MP::Kernel::NODE{$self->{id}}
81 } 92 unless $self->{connect_to};
93
94 AE::log 9 => "@reason";
82} 95}
83 96
84# called after handshake was successful 97# called after handshake was successful
85sub transport_connect { 98sub transport_connect {
86 my ($self, $transport) = @_; 99 my ($self, $transport) = @_;
87 100
101 delete $self->{trial};
102
88 $self->transport_error (transport_error => "switched connections") 103 $self->transport_error (transport_error => $self->{id}, "switched connections")
89 if $self->{transport}; 104 if $self->{transport};
90 105
91 delete $self->{connect_w}; 106 delete $self->{connect_w};
92 delete $self->{connect_to}; 107 delete $self->{connect_to};
93 108
94 $self->{transport} = $transport; 109 $self->{transport} = $transport;
95 110
96 my $transport_send = $transport->can ("send"); 111 my $transport_send = $transport->{send};
97
98 $self->{send} = sub {
99 $transport_send->($transport, $_[0]);
100 };
101 112
102 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1); 113 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
103 114
115 $self->{send} = $transport_send;
116
104 $transport->send ($_) 117 $transport_send->($_)
105 for @{ delete $self->{queue} || [] }; 118 for @{ delete $self->{queue} || [] };
106} 119}
107 120
108sub connect { 121sub connect {
109 my ($self) = @_; 122 my ($self) = @_;
110 123
111 return if $self->{transport}; 124 return if $self->{transport};
125 return if $self->{connect_w};
112 126
113 # just ignore connect requests for slave nodes - let's hope it connects to us instead 127 # we unweaken the node reference, in case it was weakened before
114 return if $self->{noderef} =~ /^slave\//; 128 $AnyEvent::MP::Kernel::NODE{$self->{id}}
129 = $AnyEvent::MP::Kernel::NODE{$self->{id}};
115 130
116 Scalar::Util::weaken $self; 131 Scalar::Util::weaken $self;
117 132
118 $self->{connect_to} ||= AE::timer 133 $self->{connect_to} ||= AE::timer $AnyEvent::MP::Kernel::CONFIG->{connect_interval}, 0, sub {
119 $AnyEvent::MP::Config::CFG{monitor_timeout} || $AnyEvent::MP::Kernel::MONITOR_TIMEOUT, 134 $self->transport_error (transport_error => $self->{id}, "connect timeout");
135 };
136
137 # maybe @$addresses?
138 my $addresses = $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}};
139
140 if ($addresses) {
141 $self->connect_to ($addresses);
142 } else {
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});
120 0, 148 }
121 sub { 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");
160 return;
161 }
162
163 AE::log 9 => "connecting to $self->{id} with [@$addresses]";
164
165 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
166 my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
167
168 $interval = ($monitor - $interval) / @$addresses
169 if ($monitor - $interval) / @$addresses < $interval;
170
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
122 $self->transport_error (transport_error => $self->{noderef}, "unable to connect"); 177 or return $self->transport_error (transport_error => $self->{id}, "unable to connect to any address");
178
179 AE::log 9 => "connecting to $self->{id} at $endpoint";
180
181 $self->{trial}{$endpoint} ||= do {
182 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
183 or return AE::log critical => "$self->{id}: '$endpoint' is not a resolved node reference.";
184
185 AnyEvent::MP::Transport::mp_connect
186 $host, $port,
187 sub { delete $self->{trial}{$endpoint} },
123 }; 188 };
124
125 unless ($self->{connect_w}) {
126 my @endpoints;
127 my %trial;
128
129 $self->{connect_w} = AE::timer
130 rand,
131 $AnyEvent::MP::Config::CFG{connect_interval} || $AnyEvent::MP::Kernel::CONNECT_INTERVAL,
132 sub {
133 @endpoints = split /,/, $self->{noderef}
134 unless @endpoints;
135
136 my $endpoint = shift @endpoints;
137
138 $trial{$endpoint} ||= do {
139 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
140 or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{noderef}: not a resolved node reference.");
141
142 AnyEvent::MP::Transport::mp_connect
143 $host, $port,
144 sub { delete $trial{$endpoint} }
145 ;
146 };
147 }
148 ;
149 } 189 };
150} 190}
151 191
152sub kill { 192sub kill {
153 my ($self, $port, @reason) = @_; 193 my ($self, $port, @reason) = @_;
154 194
155 $self->send (["", kil => $port, @reason]); 195 $self->{send} (["", kil1 => $port, @reason]);
156} 196}
157 197
158sub monitor { 198sub monitor {
159 my ($self, $portid, $cb) = @_; 199 my ($self, $portid, $cb) = @_;
160 200
… …
178 $self->send (["", mon0 => $portid]); 218 $self->send (["", mon0 => $portid]);
179 delete $self->{monitor}{$portid}; 219 delete $self->{monitor}{$portid};
180 } 220 }
181} 221}
182 222
183# used for direct slave connections as well
184package AnyEvent::MP::Node::Direct;
185
186use base "AnyEvent::MP::Node::External";
187
188package AnyEvent::MP::Node::Self; 223package AnyEvent::MP::Node::Self; # the local node
189 224
190use base "AnyEvent::MP::Node"; 225use base "AnyEvent::MP::Node";
191 226
192sub connect { 227sub connect {
193 # we are trivially connected 228 # we are trivially connected
194} 229}
195 230
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 $DELAY = -50;
242};
243
196sub transport_reset { 244sub transport_reset {
197 my ($self) = @_; 245 my ($self) = @_;
198 246
199 Scalar::Util::weaken $self; 247 Scalar::Util::weaken $self;
200 248
201 $self->{send} = sub { 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
202 local $AnyEvent::MP::Kernel::SRCNODE = $self; 257 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
203 AnyEvent::MP::Kernel::_inject (@{ $_[0] }); 258 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
204 }; 259 };
205} 260}
206 261
262sub transport_connect {
263 my ($self, $tp) = @_;
264
265 AE::log 9 => "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})";
266}
267
207sub kill { 268sub kill {
208 my ($self, $port, @reason) = @_; 269 my (undef, @args) = @_;
209 270
210 delete $AnyEvent::MP::Kernel::PORT{$port}; 271 # we _always_ delay kil's, to avoid calling mon callbacks
211 delete $AnyEvent::MP::Kernel::PORT_DATA{$port}; 272 # from anything but the event loop context.
212 273 $DELAY = 1;
213 my $mon = delete $AnyEvent::MP::Kernel::LMON{$port} 274 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
214 or !@reason 275 $DELAY_W ||= AE::timer 0, 0, $send_delayed;
215 or $AnyEvent::MP::Kernel::WARN->(2, "unmonitored local port $port died with reason: @reason");
216
217 $_->(@reason) for values %$mon;
218} 276}
219 277
220sub monitor { 278sub monitor {
221 my ($self, $portid, $cb) = @_; 279 # maybe always delay, too?
222 280 if ($DELAY_W) {
223 return $cb->(no_such_port => "cannot monitor nonexistent port") 281 my @args = @_;
224 unless exists $AnyEvent::MP::Kernel::PORT{$portid}; 282 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
225 283 return;
226 $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb; 284 }
285 &AnyEvent::MP::Kernel::_monitor;
227} 286}
228 287
229sub unmonitor { 288sub unmonitor {
230 my ($self, $portid, $cb) = @_; 289 # no need to always delay
290 if ($DELAY_W) {
291 my @args = @_;
292 push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) };
293 return;
294 }
231 295
232 delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0}; 296 &AnyEvent::MP::Kernel::_unmonitor;
233} 297}
234 298
235=head1 SEE ALSO 299=head1 SEE ALSO
236 300
237L<AnyEvent::MP>. 301L<AnyEvent::MP>.

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