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Comparing AnyEvent-MP/MP/Node.pm (file contents):
Revision 1.18 by root, Wed Aug 12 21:39:59 2009 UTC vs.
Revision 1.64 by root, Fri Mar 23 21:16:25 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
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;
27 28
29 $self->init;
28 $self->transport_reset; 30 $self->transport_reset;
29 31
30 $self 32 $self
31} 33}
32 34
35sub init {
36 #
37}
38
33sub send { 39sub send {
34 &{$_[0]->{send}} 40 &{ shift->{send} }
35} 41}
36 42
37package AnyEvent::MP::Node::External; 43# nodes reachable via the network
44package AnyEvent::MP::Node::Remote; # a remote node
38 45
39use base "AnyEvent::MP::Node"; 46use base "AnyEvent::MP::Node";
40 47
41# called at init time, mostly sets {send} 48# called at init time, mostly sets {send}
42sub transport_reset { 49sub transport_reset {
43 my ($self) = @_; 50 my ($self) = @_;
44 51
45 delete $self->{transport}; 52 delete $self->{transport};
46 53
54 Scalar::Util::weaken $self;
55
47 $self->{send} = sub { 56 $self->{send} = sub {
48 push @{$_[0]{queue}}, $_[1]; 57 push @{$self->{queue}}, shift;
49 $_[0]->connect; 58 $self->connect;
50 }; 59 };
51} 60}
52 61
53# called only after successful handshake 62# called each time we fail to establish a connection,
63# or the existing connection failed
54sub transport_error { 64sub transport_error {
55 my ($self, @reason) = @_; 65 my ($self, @reason) = @_;
56 66
67 my $no_transport = !$self->{transport};
68
69 delete $self->{connect_w};
70 delete $self->{connect_to};
71
57 delete $self->{queue}; 72 delete $self->{queue};
58 $self->transport_reset; 73 $self->transport_reset;
59 74
60 if (my $mon = delete $self->{lmon}) { 75 if (my $mon = delete $self->{lmon}) {
61 $_->(@reason) for map @$_, values %$mon; 76 $_->(@reason) for map @$_, values %$mon;
62 } 77 }
78
79 AnyEvent::MP::Kernel::_inject_nodeevent ($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} || $self->{connect_to};
63} 85}
64 86
65# called after handshake was successful 87# called after handshake was successful
66sub transport_connect { 88sub transport_connect {
67 my ($self, $transport) = @_; 89 my ($self, $transport) = @_;
68 90
69 $self->transport_reset 91 delete $self->{trial};
92
93 $self->transport_error (transport_error => $self->{id}, "switched connections")
70 if $self->{transport}; 94 if $self->{transport};
71 95
72 delete $self->{connect_w}; 96 delete $self->{connect_w};
73 delete $self->{connect_to}; 97 delete $self->{connect_to};
74 98
75 $self->{transport} = $transport; 99 $self->{transport} = $transport;
76 100
77 $self->{send} = sub { 101 my $transport_send = $transport->{send};
78 $transport->send ($_[1]);
79 };
80 102
103 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
104
105 $self->{send} = $transport_send;
106
81 $transport->send ($_) 107 $transport_send->($_)
82 for @{ delete $self->{queue} || [] }; 108 for @{ delete $self->{queue} || [] };
83} 109}
84 110
85sub connect { 111sub connect {
86 my ($self) = @_; 112 my ($self) = @_;
87 113
114 return if $self->{transport};
115 return if $self->{connect_w};
116
88 Scalar::Util::weaken $self; 117 Scalar::Util::weaken $self;
118 use Carp;Carp::cluck;#d#
89 119
90 $self->{connect_to} ||= AE::timer 120 $self->{connect_to} ||= AE::timer $AnyEvent::MP::Kernel::CONFIG->{connect_interval}, 0, sub {
91 $AnyEvent::MP::Config::CFG{monitor_timeout} || $AnyEvent::MP::Kernel::MONITOR_TIMEOUT,
92 0,
93 sub {
94 $self->transport_error (transport_error => $self->{noderef}, "unable to connect"); 121 $self->transport_error (transport_error => $self->{id}, "unable to connect");
122 };
123
124 # maybe @$addresses?
125 my $addresses = $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}};
126
127 if ($addresses) {
128 $self->connect_to ($addresses);
129 } else {
130 # on global nodes, all bets are off now - we either know the node, or we don't
131 unless ($AnyEvent::MP::Kernel::GLOBAL) {
132 AnyEvent::MP::Kernel::g_find ($self->{id});
133 }
134 }
135}
136
137sub connect_to {
138 my ($self, $addresses) = @_;
139
140 return if $self->{transport};
141 return if $self->{connect_w};
142
143 return unless @$addresses;
144
145 AE::log 9 => "connecting to $self->{id} with [@$addresses]";
146
147 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
148 my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval};
149
150 $interval = ($monitor - $interval) / @$addresses
151 if ($monitor - $interval) / @$addresses < $interval;
152
153 $interval = 0.4 if $interval < 0.4;
154
155 my @endpoints = reverse @$addresses;
156
157 $self->{connect_w} = AE::timer 0, $interval * (0.9 + 0.1 * rand), sub {
158 my $endpoint = pop @endpoints;
159
160 AE::log 9 => "connecting to $self->{id} at $endpoint";
161
162 $self->{trial}{$endpoint} ||= do {
163 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
164 or return AE::log critical => "$self->{id}: '$endpoint' is not a resolved node reference.";
165
166 AnyEvent::MP::Transport::mp_connect
167 $host, $port,
168 sub { delete $self->{trial}{$endpoint} },
95 }; 169 };
96
97 unless ($self->{connect_w}) {
98 my @endpoints;
99 my %trial;
100
101 $self->{connect_w} = AE::timer
102 0,
103 $AnyEvent::MP::Config::CFG{connect_interval} || $AnyEvent::MP::Kernel::CONNECT_INTERVAL,
104 sub {
105 @endpoints = split /,/, $self->{noderef}
106 unless @endpoints;
107
108 my $endpoint = shift @endpoints;
109
110 $trial{$endpoint} ||= do {
111 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
112 or return $AnyEvent::MP::Kernel::WARN->("$self->{noderef}: not a resolved node reference.");
113
114 AnyEvent::MP::Transport::mp_connect
115 $host, $port,
116 sub { delete $trial{$endpoint} }
117 ;
118 };
119 }
120 ;
121 } 170 };
122} 171}
123 172
124sub kill { 173sub kill {
125 my ($self, $port, @reason) = @_; 174 my ($self, $port, @reason) = @_;
126 175
127 $self->send (["", kil => $port, @reason]); 176 $self->{send} (["", kil => $port, @reason]);
128} 177}
129 178
130sub monitor { 179sub monitor {
131 my ($self, $portid, $cb) = @_; 180 my ($self, $portid, $cb) = @_;
132 181
133 my $list = $self->{lmon}{$portid} ||= []; 182 my $list = $self->{lmon}{$portid} ||= [];
134 183
135 $self->send (["", mon1 => $portid]) 184 $self->send (["", mon1 => $portid])
136 unless @$list; 185 unless @$list || !length $portid;
137 186
138 push @$list, $cb; 187 push @$list, $cb;
139} 188}
140 189
141sub unmonitor { 190sub unmonitor {
… …
150 $self->send (["", mon0 => $portid]); 199 $self->send (["", mon0 => $portid]);
151 delete $self->{monitor}{$portid}; 200 delete $self->{monitor}{$portid};
152 } 201 }
153} 202}
154 203
155package AnyEvent::MP::Node::Direct; 204package AnyEvent::MP::Node::Self; # the local node
156 205
157use base "AnyEvent::MP::Node::External";
158
159package AnyEvent::MP::Node::Indirect;
160
161use base "AnyEvent::MP::Node::Direct"; 206use base "AnyEvent::MP::Node";
162 207
163sub connect { 208sub connect {
164 my ($self) = @_; 209 # we are trivially connected
165
166 $self->transport_error (transport_error => $self->{noderef}, "unable to connect to indirect node");
167} 210}
168 211
169package AnyEvent::MP::Node::Self; 212# delay every so often to avoid recursion, also used to delay after spawn
213our $DELAY = -50;
214our @DELAY;
215our $DELAY_W;
170 216
171use base "AnyEvent::MP::Node"; 217our $send_delayed = sub {
218 $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
219 (shift @DELAY)->()
220 while @DELAY;
221 undef $DELAY_W;
222 $DELAY = -50;
223};
172 224
173sub transport_reset { 225sub transport_reset {
174 my ($self) = @_; 226 my ($self) = @_;
175 227
228 Scalar::Util::weaken $self;
229
176 $self->{send} = sub { 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
177 local $AnyEvent::MP::Kernel::SRCNODE = $_[0]; 238 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE;
178 AnyEvent::MP::Kernel::_inject (@{ $_[1] }); 239 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
179 }; 240 };
241}
242
243sub transport_connect {
244 my ($self, $tp) = @_;
245
246 AE::log 9 => "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})";
180} 247}
181 248
182sub kill { 249sub kill {
183 my ($self, $port, @reason) = @_; 250 my (undef, @args) = @_;
184 251
185 delete $AnyEvent::MP::Kernel::PORT{$port}; 252 # we _always_ delay kil's, to avoid calling mon callbacks
186 delete $AnyEvent::MP::Kernel::PORT_DATA{$port}; 253 # from anything but the event loop context.
187 254 $DELAY = 1;
188 my $mon = delete $AnyEvent::MP::Kernel::LMON{$port} 255 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
189 or !@reason 256 $DELAY_W ||= AE::timer 0, 0, $send_delayed;
190 or $AnyEvent::MP::Kernel::WARN->("unmonitored local port $port died with reason: @reason");
191
192 $_->(@reason) for values %$mon;
193} 257}
194 258
195sub monitor { 259sub monitor {
196 my ($self, $portid, $cb) = @_; 260 # maybe always delay, too?
197 261 if ($DELAY_W) {
198 return $cb->(no_such_port => "cannot monitor nonexistent port") 262 my @args = @_;
199 unless exists $AnyEvent::MP::Kernel::PORT{$portid}; 263 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
200 264 return;
201 $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb; 265 }
266 &AnyEvent::MP::Kernel::_monitor;
202} 267}
203 268
204sub unmonitor { 269sub unmonitor {
205 my ($self, $portid, $cb) = @_; 270 # no need to always delay
271 if ($DELAY_W) {
272 my @args = @_;
273 push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) };
274 return;
275 }
206 276
207 delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0}; 277 &AnyEvent::MP::Kernel::_unmonitor;
208} 278}
209 279
210=head1 SEE ALSO 280=head1 SEE ALSO
211 281
212L<AnyEvent::MP>. 282L<AnyEvent::MP>.

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