1 | =head1 NAME |
1 | =head1 NAME |
2 | |
2 | |
3 | AnyEvent::MP::Node - a single processing node (CPU/process...) |
3 | AnyEvent::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 | |
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11 | This is an internal utility module, horrible to look at, so don't. |
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12 | |
11 | =cut |
13 | =cut |
12 | |
14 | |
13 | package AnyEvent::MP::Node; |
15 | package AnyEvent::MP::Node; # base class for nodes |
14 | |
16 | |
15 | use common::sense; |
17 | use common::sense; |
16 | |
18 | |
17 | use AE (); |
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18 | use AnyEvent::Util (); |
19 | use AnyEvent (); |
19 | use AnyEvent::Socket (); |
20 | use AnyEvent::Socket (); |
20 | |
21 | |
21 | use AnyEvent::MP::Transport (); |
22 | use AnyEvent::MP::Transport (); |
22 | |
23 | |
23 | use base Exporter::; |
24 | sub new { |
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25 | my ($self, $id) = @_; |
24 | |
26 | |
25 | our $VERSION = '0.0'; |
27 | $self = bless { id => $id }, $self; |
26 | |
28 | |
27 | our $DEFAULT_PORT = "4040"; |
29 | $self->init; |
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30 | $self->transport_reset; |
28 | |
31 | |
29 | sub normalise_noderef($) { |
32 | $self |
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33 | } |
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34 | |
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35 | sub init { |
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36 | # |
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37 | } |
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38 | |
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39 | sub send { |
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40 | &{ shift->{send} } |
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41 | } |
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42 | |
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43 | # nodes reachable via the network |
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44 | package AnyEvent::MP::Node::Remote; # a remote node |
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45 | |
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46 | use base "AnyEvent::MP::Node"; |
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47 | |
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48 | # called at init time, mostly sets {send} |
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49 | sub transport_reset { |
30 | my ($noderef) = @_; |
50 | my ($self) = @_; |
31 | |
51 | |
32 | my $cv = AE::cv; |
52 | delete $self->{transport}; |
33 | my @res; |
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34 | |
53 | |
35 | $cv->begin (sub { |
54 | Scalar::Util::weaken $self; |
36 | my %seen; |
55 | |
37 | my @refs; |
56 | $self->{send} = sub { |
38 | for (sort { $a->[0] <=> $b->[0] } @res) { |
57 | push @{$self->{queue}}, shift; |
39 | push @refs, $_->[1] unless $seen{$_->[1]}++ |
58 | $self->connect; |
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59 | }; |
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60 | } |
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61 | |
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62 | # called each time we fail to establish a connection, |
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63 | # or the existing connection failed |
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64 | sub transport_error { |
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65 | my ($self, @reason) = @_; |
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66 | |
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67 | my $no_transport = !$self->{transport}; |
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68 | |
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69 | delete $self->{connect_w}; |
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70 | delete $self->{connect_to}; |
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71 | |
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72 | delete $self->{queue}; |
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73 | $self->transport_reset; |
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74 | |
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75 | if (my $mon = delete $self->{lmon}) { |
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76 | $_->(@reason) for map @$_, values %$mon; |
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77 | } |
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78 | |
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79 | AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason) |
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80 | unless $no_transport; |
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81 | |
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82 | # if we are here and are idle, we nuke ourselves |
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83 | delete $AnyEvent::MP::Kernel::NODE{$self->{id}} |
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84 | unless $self->{transport} || $self->{connect_to}; |
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85 | } |
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86 | |
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87 | # called after handshake was successful |
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88 | sub transport_connect { |
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89 | my ($self, $transport) = @_; |
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90 | |
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91 | delete $self->{trial}; |
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92 | |
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93 | $self->transport_error (transport_error => $self->{id}, "switched connections") |
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94 | if $self->{transport}; |
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95 | |
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96 | delete $self->{connect_w}; |
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97 | delete $self->{connect_to}; |
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98 | |
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99 | $self->{transport} = $transport; |
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100 | |
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101 | my $transport_send = $transport->{send}; |
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102 | |
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103 | AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1); |
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104 | |
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105 | $self->{send} = $transport_send; |
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106 | |
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107 | $transport_send->($_) |
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108 | for @{ delete $self->{queue} || [] }; |
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109 | } |
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110 | |
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111 | sub connect { |
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112 | my ($self) = @_; |
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113 | |
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114 | return if $self->{transport}; |
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115 | return if $self->{connect_w}; |
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116 | |
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117 | Scalar::Util::weaken $self; |
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118 | |
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119 | $self->{connect_to} ||= AE::timer $AnyEvent::MP::Kernel::CONFIG->{connect_interval}, 0, sub { |
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120 | $self->transport_error (transport_error => $self->{id}, "unable to connect"); |
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121 | }; |
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122 | |
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123 | # maybe @$addresses? |
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124 | my $addresses = $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}}; |
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125 | |
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126 | if ($addresses) { |
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127 | $self->connect_to ($addresses); |
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128 | } else { |
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129 | # on global nodes, all bets are off now - we either know the node, or we don't |
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130 | unless ($AnyEvent::MP::Kernel::GLOBAL) { |
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131 | AnyEvent::MP::Kernel::g_find ($self->{id}); |
40 | } |
132 | } |
41 | shift->send (join ",", @refs); |
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42 | }); |
133 | } |
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134 | } |
43 | |
135 | |
44 | $noderef = $DEFAULT_PORT unless length $noderef; |
136 | sub connect_to { |
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137 | my ($self, $addresses) = @_; |
45 | |
138 | |
46 | my $idx; |
139 | return if $self->{transport}; |
47 | for my $t (split /,/, $noderef) { |
140 | return if $self->{connect_w}; |
48 | my $pri = ++$idx; |
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49 | |
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50 | #TODO: this should be outside normalise_noderef and in become_public |
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51 | if ($t =~ /^\d*$/) { |
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52 | require POSIX; |
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53 | my $nodename = (POSIX::uname ())[1]; |
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54 | |
141 | |
55 | $cv->begin; |
142 | return unless @$addresses; |
56 | AnyEvent::Socket::resolve_sockaddr $nodename, $t || "aemp=$DEFAULT_PORT", "tcp", 0, undef, sub { |
143 | |
57 | for (@_) { |
144 | AE::log 9 => "connecting to $self->{id} with [@$addresses]"; |
58 | my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3]; |
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59 | push @res, [ |
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60 | $pri += 1e-5, |
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61 | AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service |
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62 | ]; |
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63 | } |
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64 | $cv->end; |
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65 | }; |
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66 | |
145 | |
67 | # my (undef, undef, undef, undef, @ipv4) = gethostbyname $nodename; |
146 | my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout}; |
68 | # |
147 | my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval}; |
69 | # for (@ipv4) { |
148 | |
70 | # push @res, [ |
149 | $interval = ($monitor - $interval) / @$addresses |
71 | # $pri, |
150 | if ($monitor - $interval) / @$addresses < $interval; |
72 | # AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $_, $t || $DEFAULT_PORT, |
151 | |
73 | # ]; |
152 | $interval = 0.4 if $interval < 0.4; |
74 | # } |
153 | |
75 | } else { |
154 | my @endpoints = reverse @$addresses; |
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155 | |
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156 | $self->{connect_w} = AE::timer 0, $interval * (0.9 + 0.1 * rand), sub { |
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157 | my $endpoint = pop @endpoints; |
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158 | |
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159 | AE::log 9 => "connecting to $self->{id} at $endpoint"; |
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160 | |
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161 | $self->{trial}{$endpoint} ||= do { |
76 | my ($host, $port) = AnyEvent::Socket::parse_hostport $t, "aemp=$DEFAULT_PORT" |
162 | my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint |
77 | or Carp::croak "$t: unparsable transport descriptor"; |
163 | or return AE::log critical => "$self->{id}: '$endpoint' is not a resolved node reference."; |
78 | |
164 | |
79 | $cv->begin; |
165 | AnyEvent::MP::Transport::mp_connect |
80 | AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub { |
166 | $host, $port, |
81 | for (@_) { |
167 | sub { delete $self->{trial}{$endpoint} }, |
82 | my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3]; |
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83 | push @res, [ |
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84 | $pri += 1e-5, |
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85 | AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service |
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86 | ]; |
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87 | } |
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88 | $cv->end; |
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89 | } |
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90 | } |
168 | }; |
91 | } |
169 | }; |
92 | |
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93 | $cv->end; |
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94 | |
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95 | $cv |
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96 | } |
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97 | |
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98 | sub new { |
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99 | my ($class, $noderef) = @_; |
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100 | |
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101 | bless { noderef => $noderef }, $class |
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102 | } |
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103 | |
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104 | package AnyEvent::MP::Node::Direct; |
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105 | |
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106 | use base "AnyEvent::MP::Node"; |
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107 | |
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108 | sub send { |
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109 | my ($self, $msg) = @_; |
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110 | |
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111 | if ($self->{transport}) { |
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112 | $self->{transport}->send ($msg); |
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113 | } elsif ($self->{queue}) { |
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114 | push @{ $self->{queue} }, $msg; |
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115 | } else { |
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116 | $self->{queue} = [$msg]; |
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117 | $self->connect; |
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118 | } |
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119 | } |
170 | } |
120 | |
171 | |
121 | sub kill { |
172 | sub kill { |
122 | my ($self, $port, @reason) = @_; |
173 | my ($self, $port, @reason) = @_; |
123 | |
174 | |
124 | $self->send (["", kil => $port, @reason]); |
175 | $self->{send} (["", kil => $port, @reason]); |
125 | } |
176 | } |
126 | |
177 | |
127 | sub monitor { |
178 | sub monitor { |
128 | my ($self, $portid, $cb) = @_; |
179 | my ($self, $portid, $cb) = @_; |
129 | |
180 | |
130 | return $cb->("node failed conenction") |
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131 | if $self->{failed}; |
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132 | |
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133 | my $list = $self->{lmon}{$portid} ||= []; |
181 | my $list = $self->{lmon}{$portid} ||= []; |
134 | |
182 | |
135 | $self->send (["", mon1 => $portid]) |
183 | $self->send (["", mon1 => $portid]) |
136 | unless @$list; |
184 | unless @$list || !length $portid; |
137 | |
185 | |
138 | push @$list, $cb; |
186 | push @$list, $cb; |
139 | } |
187 | } |
140 | |
188 | |
141 | sub unmonitor { |
189 | sub unmonitor { |
… | |
… | |
150 | $self->send (["", mon0 => $portid]); |
198 | $self->send (["", mon0 => $portid]); |
151 | delete $self->{monitor}{$portid}; |
199 | delete $self->{monitor}{$portid}; |
152 | } |
200 | } |
153 | } |
201 | } |
154 | |
202 | |
155 | sub set_transport { |
203 | package AnyEvent::MP::Node::Self; # the local node |
156 | my ($self, $transport) = @_; |
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157 | |
204 | |
158 | $self->clr_transport |
205 | use base "AnyEvent::MP::Node"; |
159 | if $self->{transport}; |
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160 | |
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161 | if ( |
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162 | exists $self->{remote_uniq} |
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163 | && $self->{remote_uniq} ne $transport->{remote_uniq} |
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164 | ) { |
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165 | # uniq changed, different node |
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166 | $self->fail ("node restart detected"); |
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167 | } |
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168 | |
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169 | delete $self->{trial}; |
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170 | delete $self->{next_connect}; |
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171 | delete $self->{failed}; |
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172 | |
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173 | $self->{remote_uniq} = $transport->{remote_uniq}; |
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174 | $self->{transport} = $transport; |
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175 | |
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176 | $transport->send ($_) |
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177 | for @{ delete $self->{queue} || [] }; |
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178 | } |
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179 | |
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180 | sub fail { |
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181 | my ($self, @reason) = @_; |
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182 | |
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183 | delete $self->{queue}; |
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184 | |
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185 | $self->{failed} = 1; |
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186 | |
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187 | if (my $mon = delete $self->{lmon}) { |
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188 | $_->(@reason) for map @$_, values %$mon; |
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189 | } |
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190 | } |
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191 | |
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192 | sub clr_transport { |
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193 | my ($self, @reason) = @_; |
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194 | |
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195 | delete $self->{transport}; |
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196 | $self->connect; |
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197 | } |
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198 | |
206 | |
199 | sub connect { |
207 | sub connect { |
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208 | # we are trivially connected |
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209 | } |
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210 | |
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211 | # delay every so often to avoid recursion, also used to delay after spawn |
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212 | our $DELAY = -50; |
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213 | our @DELAY; |
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214 | our $DELAY_W; |
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215 | |
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216 | our $send_delayed = sub { |
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217 | $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE; |
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218 | (shift @DELAY)->() |
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219 | while @DELAY; |
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220 | undef $DELAY_W; |
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221 | $DELAY = -50; |
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222 | }; |
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223 | |
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224 | sub transport_reset { |
200 | my ($self) = @_; |
225 | my ($self) = @_; |
201 | |
226 | |
202 | Scalar::Util::weaken $self; |
227 | Scalar::Util::weaken $self; |
203 | |
228 | |
204 | unless (exists $self->{n_noderef}) { |
229 | $self->{send} = sub { |
205 | return if $self->{n_noderef_}++; |
230 | if (++$DELAY > 0) { |
206 | (AnyEvent::MP::Node::normalise_noderef ($self->{noderef}))->cb (sub { |
231 | my $msg = $_[0]; |
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232 | push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) }; |
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233 | $DELAY_W ||= AE::timer 0, 0, $send_delayed; |
207 | $self or return; |
234 | return; |
208 | delete $self->{n_noderef_}; |
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209 | my $noderef = shift->recv; |
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210 | |
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211 | $self->{n_noderef} = $noderef; |
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212 | |
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213 | $AnyEvent::MP::Base::NODE{$_} = $self |
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214 | for split /,/, $noderef; |
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215 | |
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216 | $self->connect; |
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217 | }); |
235 | } |
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236 | |
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237 | local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE; |
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238 | AnyEvent::MP::Kernel::_inject (@{ $_[0] }); |
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239 | }; |
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240 | } |
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241 | |
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242 | sub transport_connect { |
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243 | my ($self, $tp) = @_; |
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244 | |
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245 | AE::log 9 => "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})"; |
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246 | } |
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247 | |
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248 | sub kill { |
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249 | my (undef, @args) = @_; |
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250 | |
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251 | # we _always_ delay kil's, to avoid calling mon callbacks |
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252 | # from anything but the event loop context. |
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253 | $DELAY = 1; |
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254 | push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) }; |
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255 | $DELAY_W ||= AE::timer 0, 0, $send_delayed; |
|
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256 | } |
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257 | |
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258 | sub monitor { |
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259 | # maybe always delay, too? |
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260 | if ($DELAY_W) { |
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261 | my @args = @_; |
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262 | push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) }; |
218 | return; |
263 | return; |
219 | } |
264 | } |
220 | |
265 | &AnyEvent::MP::Kernel::_monitor; |
221 | $self->{retry} ||= [split /,/, $self->{n_noderef}]; |
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222 | |
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223 | my $endpoint = shift @{ $self->{retry} }; |
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224 | |
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225 | if (defined $endpoint) { |
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226 | $self->{trial}{$endpoint} ||= do { |
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227 | my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint |
|
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228 | or return; |
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229 | |
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230 | my ($w, $g); |
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231 | |
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232 | $w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub { |
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233 | delete $self->{trial}{$endpoint}; |
|
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234 | }; |
|
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235 | $g = AnyEvent::MP::Transport::mp_connect |
|
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236 | $host, $port, |
|
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237 | sub { |
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238 | delete $self->{trial}{$endpoint} |
|
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239 | unless @_; |
|
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240 | $g = shift; |
|
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241 | }; |
|
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242 | ; |
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243 | |
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244 | [$w, \$g] |
|
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245 | }; |
|
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246 | } else { |
|
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247 | delete $self->{retry}; |
|
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248 | } |
|
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249 | |
|
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250 | $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub { |
|
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251 | $self->connect; |
|
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252 | }; |
|
|
253 | } |
|
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254 | |
|
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255 | package AnyEvent::MP::Node::Self; |
|
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256 | |
|
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257 | use base "AnyEvent::MP::Node"; |
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258 | |
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259 | sub set_transport { |
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260 | die "FATAL error, set_transport was called"; |
|
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261 | } |
|
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262 | |
|
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263 | sub send { |
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264 | local $AnyEvent::MP::Base::SRCNODE = $_[0]; |
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265 | AnyEvent::MP::Base::_inject (@{ $_[1] }); |
|
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266 | } |
|
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267 | |
|
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268 | sub kill { |
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269 | my ($self, $port, @reason) = @_; |
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270 | |
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271 | delete $AnyEvent::MP::Base::PORT{$port}; |
|
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272 | delete $AnyEvent::MP::Base::PORT_DATA{$port}; |
|
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273 | |
|
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274 | my $mon = delete $AnyEvent::MP::Base::LMON{$port} |
|
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275 | or !@reason |
|
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276 | or $AnyEvent::MP::Base::WARN->("unmonitored local port $port died with reason: @reason"); |
|
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277 | |
|
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278 | $_->(@reason) for values %$mon; |
|
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279 | } |
|
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280 | |
|
|
281 | sub monitor { |
|
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282 | my ($self, $portid, $cb) = @_; |
|
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283 | |
|
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284 | return $cb->() |
|
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285 | unless exists $AnyEvent::MP::Base::PORT{$portid}; |
|
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286 | |
|
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287 | $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb; |
|
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288 | } |
266 | } |
289 | |
267 | |
290 | sub unmonitor { |
268 | sub unmonitor { |
291 | my ($self, $portid, $cb) = @_; |
269 | # no need to always delay |
|
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270 | if ($DELAY_W) { |
|
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271 | my @args = @_; |
|
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272 | push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) }; |
|
|
273 | return; |
|
|
274 | } |
292 | |
275 | |
293 | delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0}; |
276 | &AnyEvent::MP::Kernel::_unmonitor; |
294 | } |
277 | } |
295 | |
278 | |
296 | =head1 SEE ALSO |
279 | =head1 SEE ALSO |
297 | |
280 | |
298 | L<AnyEvent>. |
281 | L<AnyEvent::MP>. |
299 | |
282 | |
300 | =head1 AUTHOR |
283 | =head1 AUTHOR |
301 | |
284 | |
302 | Marc Lehmann <schmorp@schmorp.de> |
285 | Marc Lehmann <schmorp@schmorp.de> |
303 | http://home.schmorp.de/ |
286 | http://home.schmorp.de/ |