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Comparing AnyEvent-MP/MP/Node.pm (file contents):
Revision 1.19 by root, Wed Aug 12 22:03:15 2009 UTC vs.
Revision 1.50 by root, Wed Dec 30 15:49:05 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
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
… …
19use AnyEvent::Socket (); 21use AnyEvent::Socket ();
20 22
21use AnyEvent::MP::Transport (); 23use AnyEvent::MP::Transport ();
22 24
23sub new { 25sub new {
24 my ($self, $noderef) = @_; 26 my ($self, $id) = @_;
25 27
26 $self = bless { noderef => $noderef }, $self; 28 $self = bless { id => $id }, $self;
27 29
30 $self->init;
28 $self->transport_reset; 31 $self->transport_reset;
29 32
30 $self 33 $self
34}
35
36sub init {
37 #
31} 38}
32 39
33sub send { 40sub send {
34 &{ shift->{send} } 41 &{ shift->{send} }
35} 42}
36 43
44# nodes reachable via the network
37package AnyEvent::MP::Node::External; 45package AnyEvent::MP::Node::External;
38 46
39use base "AnyEvent::MP::Node"; 47use base "AnyEvent::MP::Node";
40 48
41# called at init time, mostly sets {send} 49# called at init time, mostly sets {send}
… …
50 push @{$self->{queue}}, shift; 58 push @{$self->{queue}}, shift;
51 $self->connect; 59 $self->connect;
52 }; 60 };
53} 61}
54 62
55# called only after successful handshake 63# called each time we fail to establish a connection,
64# or the existing connection failed
56sub transport_error { 65sub transport_error {
57 my ($self, @reason) = @_; 66 my ($self, @reason) = @_;
58 67
68 my $no_transport = !$self->{transport};
69
70 delete $self->{connect_w};
71 delete $self->{connect_to};
72
59 delete $self->{queue}; 73 delete $self->{queue};
60 $self->transport_reset; 74 $self->transport_reset;
61 75
62 if (my $mon = delete $self->{lmon}) { 76 if (my $mon = delete $self->{lmon}) {
63 $_->(@reason) for map @$_, values %$mon; 77 $_->(@reason) for map @$_, values %$mon;
64 } 78 }
79
80 AnyEvent::MP::Kernel::_inject_nodeevent ($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} || $self->{connect_to};
65} 86}
66 87
67# called after handshake was successful 88# called after handshake was successful
68sub transport_connect { 89sub transport_connect {
69 my ($self, $transport) = @_; 90 my ($self, $transport) = @_;
70 91
71 $self->transport_reset 92 delete $self->{trial};
93
94 $self->transport_error (transport_error => "switched connections")
72 if $self->{transport}; 95 if $self->{transport};
73 96
97 delete $self->{connect_addr};
74 delete $self->{connect_w}; 98 delete $self->{connect_w};
75 delete $self->{connect_to}; 99 delete $self->{connect_to};
76 100
77 $self->{transport} = $transport; 101 $self->{transport} = $transport;
78 102
79 my $transport_send = $transport->can ("send"); 103 my $transport_send = $transport->can ("send");
80 104
105 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
106
81 $self->{send} = sub { 107 $self->{send} = sub {
82 $transport_send->($transport, $_[0]); 108 $transport_send->($transport, $_[0]);
83 }; 109 };
84 110
85 $transport->send ($_) 111 $transport->send ($_)
86 for @{ delete $self->{queue} || [] }; 112 for @{ delete $self->{queue} || [] };
87} 113}
88 114
89sub connect { 115sub connect {
90 my ($self) = @_; 116 my ($self, @addresses) = @_;
117
118 return if $self->{transport};
91 119
92 Scalar::Util::weaken $self; 120 Scalar::Util::weaken $self;
93 121
122 my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout};
123
94 $self->{connect_to} ||= AE::timer 124 $self->{connect_to} ||= AE::timer $monitor, 0, sub {
95 $AnyEvent::MP::Config::CFG{monitor_timeout} || $AnyEvent::MP::Kernel::MONITOR_TIMEOUT,
96 0,
97 sub {
98 $self->transport_error (transport_error => $self->{noderef}, "unable to connect"); 125 $self->transport_error (transport_error => $self->{id}, "unable to connect");
126 };
127
128 return unless @addresses;
129
130 if ($self->{connect_w}) {
131 # sometimes we get told about new addresses after we started to connect
132 unshift @{$self->{connect_addr}}, @addresses;
133 return;
134 }
135
136 $self->{connect_addr} = \@addresses; # a bit weird, but efficient
137
138 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]");
139
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
157 $self->{trial}{$endpoint} ||= do {
158 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
159 or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");
160
161 AnyEvent::MP::Transport::mp_connect
162 $host, $port,
163 sub { delete $self->{trial}{$endpoint} },
99 }; 164 };
100
101 unless ($self->{connect_w}) {
102 my @endpoints;
103 my %trial;
104
105 $self->{connect_w} = AE::timer
106 0,
107 $AnyEvent::MP::Config::CFG{connect_interval} || $AnyEvent::MP::Kernel::CONNECT_INTERVAL,
108 sub {
109 @endpoints = split /,/, $self->{noderef}
110 unless @endpoints;
111
112 my $endpoint = shift @endpoints;
113
114 $trial{$endpoint} ||= do {
115 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
116 or return $AnyEvent::MP::Kernel::WARN->("$self->{noderef}: not a resolved node reference.");
117
118 AnyEvent::MP::Transport::mp_connect
119 $host, $port,
120 sub { delete $trial{$endpoint} }
121 ;
122 };
123 }
124 ;
125 } 165 };
126} 166}
127 167
128sub kill { 168sub kill {
129 my ($self, $port, @reason) = @_; 169 my ($self, $port, @reason) = @_;
130 170
… …
135 my ($self, $portid, $cb) = @_; 175 my ($self, $portid, $cb) = @_;
136 176
137 my $list = $self->{lmon}{$portid} ||= []; 177 my $list = $self->{lmon}{$portid} ||= [];
138 178
139 $self->send (["", mon1 => $portid]) 179 $self->send (["", mon1 => $portid])
140 unless @$list; 180 unless @$list || !length $portid;
141 181
142 push @$list, $cb; 182 push @$list, $cb;
143} 183}
144 184
145sub unmonitor { 185sub unmonitor {
… …
154 $self->send (["", mon0 => $portid]); 194 $self->send (["", mon0 => $portid]);
155 delete $self->{monitor}{$portid}; 195 delete $self->{monitor}{$portid};
156 } 196 }
157} 197}
158 198
199# used for direct slave connections as well
159package AnyEvent::MP::Node::Direct; 200package AnyEvent::MP::Node::Direct;
160 201
161use base "AnyEvent::MP::Node::External"; 202use base "AnyEvent::MP::Node::External";
162 203
163package AnyEvent::MP::Node::Indirect; 204package AnyEvent::MP::Node::Self;
164 205
165use base "AnyEvent::MP::Node::Direct"; 206use base "AnyEvent::MP::Node";
166 207
167sub connect { 208sub connect {
168 my ($self) = @_; 209 # we are trivially connected
169
170 $self->transport_error (transport_error => $self->{noderef}, "unable to connect to indirect node");
171} 210}
172 211
173package 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;
174 216
175use base "AnyEvent::MP::Node"; 217sub _send_delayed {
218 local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE{""};
219 (shift @DELAY)->()
220 while @DELAY;
221 undef $DELAY_W;
222 $DELAY = -50;
223}
176 224
177sub transport_reset { 225sub transport_reset {
178 my ($self) = @_; 226 my ($self) = @_;
179 227
180 Scalar::Util::weaken $self; 228 Scalar::Util::weaken $self;
181 229
182 $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
183 local $AnyEvent::MP::Kernel::SRCNODE = $self; 238 local $AnyEvent::MP::Kernel::SRCNODE = $self;
184 AnyEvent::MP::Kernel::_inject (@{ $_[0] }); 239 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
185 }; 240 };
186} 241}
187 242
243sub transport_connect {
244 my ($self, $tp) = @_;
245
246 $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})");
247}
248
188sub kill { 249sub kill {
189 my ($self, $port, @reason) = @_; 250 my (undef, @args) = @_;
190 251
191 delete $AnyEvent::MP::Kernel::PORT{$port}; 252 # we _always_ delay kil's, to avoid calling mon callbacks
192 delete $AnyEvent::MP::Kernel::PORT_DATA{$port}; 253 # from anything but the event loop context.
193 254 $DELAY = 1;
194 my $mon = delete $AnyEvent::MP::Kernel::LMON{$port} 255 push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) };
195 or !@reason 256 $DELAY_W ||= AE::timer 0, 0, \&_send_delayed;
196 or $AnyEvent::MP::Kernel::WARN->("unmonitored local port $port died with reason: @reason");
197
198 $_->(@reason) for values %$mon;
199} 257}
200 258
201sub monitor { 259sub monitor {
202 my ($self, $portid, $cb) = @_; 260 # maybe always delay, too?
203 261 if ($DELAY_W) {
204 return $cb->(no_such_port => "cannot monitor nonexistent port") 262 my @args = @_;
205 unless exists $AnyEvent::MP::Kernel::PORT{$portid}; 263 push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) };
206 264 return;
207 $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb; 265 }
266 &AnyEvent::MP::Kernel::_monitor;
208} 267}
209 268
210sub unmonitor { 269sub unmonitor {
211 my ($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 }
212 276
213 delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0}; 277 &AnyEvent::MP::Kernel::_unmonitor;
214} 278}
215 279
216=head1 SEE ALSO 280=head1 SEE ALSO
217 281
218L<AnyEvent::MP>. 282L<AnyEvent::MP>.

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