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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 1.32 by root, Sun Aug 30 09:24:09 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 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;
14 16
15use common::sense; 17use common::sense;
16 18
17use AE (); 19use AE ();
20use AnyEvent::Util ();
18use AnyEvent::Socket (); 21use AnyEvent::Socket ();
19 22
20use AnyEvent::MP::Transport (); 23use AnyEvent::MP::Transport ();
21 24
22use base Exporter::; 25sub new {
26 my ($self, $id) = @_;
23 27
24our $VERSION = '0.0'; 28 $self = bless { id => $id }, $self;
25 29
26our $DEFAULT_PORT = "4040"; 30 $self->init;
31 $self->transport_reset;
27 32
28sub normalise_noderef($) { 33 $self
34}
35
36sub init {
37 #
38}
39
40sub send {
41 &{ shift->{send} }
42}
43
44# nodes reachable via the network
45package AnyEvent::MP::Node::External;
46
47use base "AnyEvent::MP::Node";
48
49# called at init time, mostly sets {send}
50sub transport_reset {
29 my ($noderef) = @_; 51 my ($self) = @_;
30 52
31 my $cv = AE::cv; 53 delete $self->{transport};
32 my @res;
33 54
34 $cv->begin (sub { 55 Scalar::Util::weaken $self;
35 my %seen; 56
36 my @refs; 57 $self->{send} = sub {
37 for (sort { $a->[0] <=> $b->[0] } @res) { 58 push @{$self->{queue}}, shift;
38 push @refs, $_->[1] unless $seen{$_->[1]}++ 59 $self->connect;
39 }
40 shift->send (join ",", @refs);
41 }); 60 };
61}
42 62
43 $noderef = $DEFAULT_PORT unless length $noderef; 63# called each time we fail to establish a connection,
64# or the existing connection failed
65sub transport_error {
66 my ($self, @reason) = @_;
44 67
45 my $idx; 68 my $no_transport = !$self->{transport};
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 69
54 $cv->begin; 70 delete $self->{connect_w};
55 AnyEvent::Socket::resolve_sockaddr $nodename, $t || "aemp=$DEFAULT_PORT", "tcp", 0, undef, sub { 71 delete $self->{connect_to};
56 for (@_) {
57 my ($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 72
66# my (undef, undef, undef, undef, @ipv4) = gethostbyname $nodename; 73 delete $self->{queue};
67# 74 $self->transport_reset;
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 75
78 $cv->begin; 76 if (my $mon = delete $self->{lmon}) {
79 AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub { 77 $_->(@reason) for map @$_, values %$mon;
80 for (@_) {
81 my ($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 } 78 }
91 79
92 $cv->end; 80 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason)
81 unless $no_transport;
93 82
94 $cv 83 # if we are here and are idle, we nuke ourselves
84 delete $AnyEvent::MP::Kernel::NODE{$self->{id}}
85 unless $self->{transport} || $self->{connect_to};
95} 86}
96 87
97sub new { 88# called after handshake was successful
98 my ($class, $noderef) = @_; 89sub transport_connect {
99
100 bless { noderef => $noderef }, $class
101}
102
103package AnyEvent::MP::Node::Direct;
104
105use base "AnyEvent::MP::Node";
106
107sub send {
108 my ($self, $msg) = @_;
109
110 if ($self->{transport}) {
111 $self->{transport}->send ($msg);
112 } elsif ($self->{queue}) {
113 push @{ $self->{queue} }, $msg;
114 } else {
115 $self->{queue} = [$msg];
116 $self->connect;
117 }
118}
119
120sub set_transport {
121 my ($self, $transport) = @_; 90 my ($self, $transport) = @_;
122 91
123 delete $self->{trial}; 92 delete $self->{trial};
93
94 $self->transport_error (transport_error => "switched connections")
95 if $self->{transport};
96
124 delete $self->{next_connect}; 97 delete $self->{connect_w};
98 delete $self->{connect_to};
125 99
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; 100 $self->{transport} = $transport;
101
102 my $transport_send = $transport->can ("send");
103
104 $self->{send} = sub {
105 $transport_send->($transport, $_[0]);
106 };
107
108 AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1);
137 109
138 $transport->send ($_) 110 $transport->send ($_)
139 for @{ delete $self->{queue} || [] }; 111 for @{ delete $self->{queue} || [] };
140} 112}
141 113
114sub connect {
115 my ($self, @addresses) = @_;
116
117 return if $self->{transport};
118
119 Scalar::Util::weaken $self;
120
121 $self->{connect_to} ||= AE::timer
122 $AnyEvent::MP::Config::CFG{monitor_timeout} || $AnyEvent::MP::Kernel::MONITOR_TIMEOUT,
123 0,
124 sub {
125 $self->transport_error (transport_error => $self->{id}, "unable to connect");
126 };
127
128 return unless @addresses;
129
130 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]");
131
132 unless ($self->{connect_w}) {
133 my @endpoints;
134
135 $self->{connect_w} = AE::timer
136 rand,
137 $AnyEvent::MP::Config::CFG{connect_interval} || $AnyEvent::MP::Kernel::CONNECT_INTERVAL,
138 sub {
139 @endpoints = @addresses
140 unless @endpoints;
141
142 my $endpoint = shift @endpoints;
143
144 $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint");
145
146 $self->{trial}{$endpoint} ||= do {
147 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
148 or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference.");
149
150 AnyEvent::MP::Transport::mp_connect
151 $host, $port,
152 sub { delete $self->{trial}{$endpoint} },
153 };
154 }
155 ;
156 }
157}
158
159sub kill {
160 my ($self, $port, @reason) = @_;
161
162 $self->send (["", kil => $port, @reason]);
163}
164
165sub monitor {
166 my ($self, $portid, $cb) = @_;
167
168 my $list = $self->{lmon}{$portid} ||= [];
169
170 $self->send (["", mon1 => $portid])
171 unless @$list || !length $portid;
172
173 push @$list, $cb;
174}
175
176sub unmonitor {
177 my ($self, $portid, $cb) = @_;
178
179 my $list = $self->{lmon}{$portid}
180 or return;
181
182 @$list = grep $_ != $cb, @$list;
183
184 unless (@$list) {
185 $self->send (["", mon0 => $portid]);
186 delete $self->{monitor}{$portid};
187 }
188}
189
190# used for direct slave connections as well
191package AnyEvent::MP::Node::Direct;
192
193use base "AnyEvent::MP::Node::External";
194
195package AnyEvent::MP::Node::Self;
196
197use base "AnyEvent::MP::Node";
198
199sub connect {
200 # we are trivially connected
201}
202
142sub clr_transport { 203sub transport_reset {
143 my ($self) = @_; 204 my ($self) = @_;
144 205
145 delete $self->{transport};
146
147 $self->connect;
148}
149
150sub connect {
151 my ($self) = @_;
152
153 Scalar::Util::weaken $self; 206 Scalar::Util::weaken $self;
154 207
155 unless (exists $self->{n_noderef}) { 208 $self->{send} = sub {
156 return if $self->{n_noderef_}++;
157 (AnyEvent::MP::Node::normalise_noderef ($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 209 local $AnyEvent::MP::Kernel::SRCNODE = $self;
165 for split /,/, $noderef; 210 AnyEvent::MP::Kernel::_inject (@{ $_[0] });
166
167 $self->connect;
168 });
169 return;
170 }
171
172 $self->{retry} ||= [split /,/, $self->{n_noderef}];
173
174 my $endpoint = shift @{ $self->{retry} };
175
176 if (defined $endpoint) {
177 $self->{trial}{$endpoint} ||= do {
178 my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint
179 or return;
180
181 my ($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
187 $host, $port,
188 sub {
189 delete $self->{trial}{$endpoint}
190 unless @_;
191 $g = shift;
192 };
193 ;
194
195 [$w, \$g]
196 };
197 } else {
198 delete $self->{retry};
199 }
200
201 $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub {
202 $self->connect;
203 }; 211 };
204} 212}
205 213
206package AnyEvent::MP::Node::Self; 214sub transport_connect {
215 my ($self, $tp) = @_;
207 216
208use base "AnyEvent::MP::Node"; 217 $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})");
209
210sub set_transport {
211 die "FATAL error, set_transport was called";
212} 218}
213 219
214sub send { 220sub kill {
215 AnyEvent::MP::Base::_inject ($_[1]); 221 my ($self, $port, @reason) = @_;
222
223 delete $AnyEvent::MP::Kernel::PORT{$port};
224 delete $AnyEvent::MP::Kernel::PORT_DATA{$port};
225
226 my $mon = delete $AnyEvent::MP::Kernel::LMON{$port}
227 or !@reason
228 or $AnyEvent::MP::Kernel::WARN->(2, "unmonitored local port $port died with reason: @reason");
229
230 $_->(@reason) for values %$mon;
231}
232
233sub monitor {
234 my ($self, $portid, $cb) = @_;
235
236 return $cb->(no_such_port => "cannot monitor nonexistent port")
237 unless exists $AnyEvent::MP::Kernel::PORT{$portid};
238
239 $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb;
240}
241
242sub unmonitor {
243 my ($self, $portid, $cb) = @_;
244
245 delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0};
216} 246}
217 247
218=head1 SEE ALSO 248=head1 SEE ALSO
219 249
220L<AnyEvent>. 250L<AnyEvent::MP>.
221 251
222=head1 AUTHOR 252=head1 AUTHOR
223 253
224 Marc Lehmann <schmorp@schmorp.de> 254 Marc Lehmann <schmorp@schmorp.de>
225 http://home.schmorp.de/ 255 http://home.schmorp.de/

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