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; |
14 | |
16 | |
15 | use common::sense; |
17 | use common::sense; |
16 | |
18 | |
17 | use AE (); |
19 | use AE (); |
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20 | use AnyEvent::Util (); |
18 | use AnyEvent::Socket (); |
21 | use AnyEvent::Socket (); |
19 | |
22 | |
20 | use AnyEvent::MP::Transport (); |
23 | use AnyEvent::MP::Transport (); |
21 | |
24 | |
22 | use base Exporter::; |
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23 | |
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24 | our $VERSION = '0.0'; |
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25 | |
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26 | sub new { |
25 | sub new { |
27 | my ($class, $noderef) = @_; |
26 | my ($self, $id) = @_; |
28 | |
27 | |
29 | bless { noderef => $noderef }, $class |
28 | $self = bless { id => $id }, $self; |
30 | } |
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31 | |
29 | |
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30 | $self->init; |
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31 | $self->transport_reset; |
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32 | |
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33 | $self |
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34 | } |
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35 | |
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36 | sub init { |
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37 | # |
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38 | } |
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39 | |
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40 | sub send { |
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41 | &{ shift->{send} } |
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42 | } |
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43 | |
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44 | # nodes reachable via the network |
32 | package AnyEvent::MP::Node::Direct; |
45 | package AnyEvent::MP::Node::External; |
33 | |
46 | |
34 | use base "AnyEvent::MP::Node"; |
47 | use base "AnyEvent::MP::Node"; |
35 | |
48 | |
36 | sub send { |
49 | # called at init time, mostly sets {send} |
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50 | sub transport_reset { |
37 | my ($self, $msg) = @_; |
51 | my ($self) = @_; |
38 | |
52 | |
39 | if ($self->{transport}) { |
53 | delete $self->{transport}; |
40 | $self->{transport}->send ($msg); |
54 | |
41 | } elsif ($self->{queue}) { |
55 | Scalar::Util::weaken $self; |
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56 | |
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57 | $self->{send} = sub { |
42 | push @{ $self->{queue} }, $msg; |
58 | push @{$self->{queue}}, shift; |
43 | } else { |
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44 | $self->{queue} = [$msg]; |
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45 | $self->connect; |
59 | $self->connect; |
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60 | }; |
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61 | } |
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62 | |
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63 | # called each time we fail to establish a connection, |
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64 | # or the existing connection failed |
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65 | sub transport_error { |
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66 | my ($self, @reason) = @_; |
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67 | |
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68 | my $no_transport = !$self->{transport}; |
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69 | |
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70 | delete $self->{connect_w}; |
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71 | delete $self->{connect_to}; |
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72 | |
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73 | delete $self->{queue}; |
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74 | $self->transport_reset; |
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75 | |
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76 | if (my $mon = delete $self->{lmon}) { |
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77 | $_->(@reason) for map @$_, values %$mon; |
46 | } |
78 | } |
47 | } |
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48 | |
79 | |
49 | sub set_transport { |
80 | AnyEvent::MP::Kernel::_inject_nodeevent ($self, 0, @reason) |
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81 | unless $no_transport; |
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82 | |
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83 | # if we are here and are idle, we nuke ourselves |
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84 | delete $AnyEvent::MP::Kernel::NODE{$self->{id}} |
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85 | unless $self->{transport} || $self->{connect_to}; |
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86 | } |
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87 | |
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88 | # called after handshake was successful |
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89 | sub transport_connect { |
50 | my ($self, $transport) = @_; |
90 | my ($self, $transport) = @_; |
51 | |
91 | |
52 | delete $self->{trial}; |
92 | delete $self->{trial}; |
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93 | |
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94 | $self->transport_error (transport_error => "switched connections") |
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95 | if $self->{transport}; |
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96 | |
53 | delete $self->{next_connect}; |
97 | delete $self->{connect_w}; |
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98 | delete $self->{connect_to}; |
54 | |
99 | |
55 | if ( |
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56 | exists $self->{remote_uniq} |
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57 | && $self->{remote_uniq} ne $transport->{remote_uniq} |
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58 | ) { |
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59 | # uniq changed, drop queue |
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60 | delete $self->{queue}; |
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61 | #TODO: "DOWN" |
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62 | } |
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63 | |
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64 | $self->{remote_uniq} = $transport->{remote_uniq}; |
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65 | $self->{transport} = $transport; |
100 | $self->{transport} = $transport; |
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101 | |
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102 | my $transport_send = $transport->can ("send"); |
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103 | |
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104 | $self->{send} = sub { |
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105 | $transport_send->($transport, $_[0]); |
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106 | }; |
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107 | |
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108 | AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1); |
66 | |
109 | |
67 | $transport->send ($_) |
110 | $transport->send ($_) |
68 | for @{ delete $self->{queue} || [] }; |
111 | for @{ delete $self->{queue} || [] }; |
69 | } |
112 | } |
70 | |
113 | |
71 | sub clr_transport { |
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72 | my ($self) = @_; |
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73 | |
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74 | delete $self->{transport}; |
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75 | |
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76 | $self->connect; |
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77 | } |
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78 | |
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79 | sub connect { |
114 | sub connect { |
80 | my ($self) = @_; |
115 | my ($self, @addresses) = @_; |
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116 | |
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117 | return if $self->{transport}; |
81 | |
118 | |
82 | Scalar::Util::weaken $self; |
119 | Scalar::Util::weaken $self; |
83 | |
120 | |
84 | unless (exists $self->{n_noderef}) { |
121 | my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout}; |
85 | (AnyEvent::MP::normalise_noderef ($self->{noderef}))->cb (sub { |
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86 | $self or return; |
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87 | my $noderef = shift->recv; |
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88 | |
122 | |
89 | $self->{n_noderef} = $noderef; |
123 | $self->{connect_to} ||= AE::timer $monitor, 0, sub { |
90 | |
124 | $self->transport_error (transport_error => $self->{id}, "unable to connect"); |
91 | $AnyEvent::MP::NODE{$_} = $self |
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92 | for split /,/, $noderef; |
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93 | |
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94 | $self->connect; |
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95 | }); |
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96 | return; |
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97 | } |
125 | }; |
98 | |
126 | |
99 | $self->{retry} ||= [split /,/, $self->{n_noderef}]; |
127 | return unless @addresses; |
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128 | return if $self->{connect_w}; |
100 | |
129 | |
101 | my $endpoint = shift @{ $self->{retry} }; |
130 | $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]"); |
102 | |
131 | |
103 | if (defined $endpoint) { |
132 | my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval}; |
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133 | |
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134 | $interval = ($monitor - $interval) / @addresses |
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135 | if ($monitor - $interval) / @addresses < $interval; |
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136 | |
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137 | $interval = 0.4 if $interval < 0.4; |
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138 | |
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139 | my @endpoints; |
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140 | |
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141 | $self->{connect_w} = AE::timer 0.050 * rand, $interval * (0.9 + 0.1 * rand), sub { |
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142 | @endpoints = @addresses |
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143 | unless @endpoints; |
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144 | |
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145 | my $endpoint = shift @endpoints; |
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146 | |
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147 | $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint"); |
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148 | |
104 | $self->{trial}{$endpoint} ||= do { |
149 | $self->{trial}{$endpoint} ||= do { |
105 | my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint |
150 | my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint |
106 | or return; |
151 | or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference."); |
107 | |
152 | |
108 | my ($w, $g); |
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109 | |
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110 | $w = AE::timer $AnyEvent::MP::CONNECT_TIMEOUT, 0, sub { |
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111 | delete $self->{trial}{$endpoint}; |
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112 | }; |
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113 | $g = AnyEvent::MP::Transport::mp_connect |
153 | AnyEvent::MP::Transport::mp_connect |
114 | $host, $port, |
154 | $host, $port, |
115 | sub { |
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116 | delete $self->{trial}{$endpoint} |
155 | sub { delete $self->{trial}{$endpoint} }, |
117 | unless @_; |
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118 | $g = shift; |
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119 | }; |
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120 | ; |
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121 | |
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122 | [$w, \$g] |
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123 | }; |
156 | }; |
124 | } else { |
157 | }; |
125 | delete $self->{retry}; |
158 | } |
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159 | |
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160 | sub kill { |
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161 | my ($self, $port, @reason) = @_; |
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162 | |
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163 | $self->send (["", kil => $port, @reason]); |
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164 | } |
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165 | |
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166 | sub monitor { |
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167 | my ($self, $portid, $cb) = @_; |
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168 | |
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169 | my $list = $self->{lmon}{$portid} ||= []; |
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170 | |
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171 | $self->send (["", mon1 => $portid]) |
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172 | unless @$list || !length $portid; |
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173 | |
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174 | push @$list, $cb; |
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175 | } |
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176 | |
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177 | sub unmonitor { |
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178 | my ($self, $portid, $cb) = @_; |
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179 | |
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180 | my $list = $self->{lmon}{$portid} |
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181 | or return; |
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182 | |
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183 | @$list = grep $_ != $cb, @$list; |
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184 | |
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185 | unless (@$list) { |
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186 | $self->send (["", mon0 => $portid]); |
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187 | delete $self->{monitor}{$portid}; |
126 | } |
188 | } |
127 | |
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128 | $self->{next_connect} = AE::timer $AnyEvent::MP::CONNECT_INTERVAL, 0, sub { |
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129 | $self->connect; |
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130 | }; |
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131 | } |
189 | } |
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190 | |
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191 | # used for direct slave connections as well |
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192 | package AnyEvent::MP::Node::Direct; |
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193 | |
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194 | use base "AnyEvent::MP::Node::External"; |
132 | |
195 | |
133 | package AnyEvent::MP::Node::Self; |
196 | package AnyEvent::MP::Node::Self; |
134 | |
197 | |
135 | use base "AnyEvent::MP::Node"; |
198 | use base "AnyEvent::MP::Node"; |
136 | |
199 | |
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200 | sub connect { |
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201 | # we are trivially connected |
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202 | } |
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203 | |
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204 | # delay every so often to avoid recursion, also used to delay after spawn |
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205 | our $DELAY; |
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206 | our @DELAY; |
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207 | our $DELAY_W; |
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208 | |
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209 | sub _send_delayed { |
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210 | local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE{""}; |
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211 | (shift @DELAY)->() |
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212 | while @DELAY; |
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213 | undef $DELAY_W; |
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214 | $DELAY = -50; |
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215 | } |
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216 | |
137 | sub set_transport { |
217 | sub transport_reset { |
138 | die "FATAL error, set_transport was called"; |
218 | my ($self) = @_; |
139 | } |
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140 | |
219 | |
141 | sub send { |
220 | Scalar::Util::weaken $self; |
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221 | |
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222 | $self->{send} = sub { |
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223 | if ($DELAY++ >= 0) { |
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224 | my $msg = $_[0]; |
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225 | push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) }; |
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226 | $DELAY_W ||= AE::timer 0, 0, \&_send_delayed; |
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227 | } else { |
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228 | local $AnyEvent::MP::Kernel::SRCNODE = $self; |
142 | AnyEvent::MP::_inject ($_[1]); |
229 | AnyEvent::MP::Kernel::_inject (@{ $_[0] }); |
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230 | } |
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231 | }; |
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232 | } |
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233 | |
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234 | sub transport_connect { |
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235 | my ($self, $tp) = @_; |
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236 | |
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237 | $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})"); |
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238 | } |
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239 | |
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240 | sub kill { |
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241 | my ($self, $port, @reason) = @_; |
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242 | |
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243 | my $delay_cb = sub { |
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244 | delete $AnyEvent::MP::Kernel::PORT{$port}; |
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245 | delete $AnyEvent::MP::Kernel::PORT_DATA{$port}; |
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246 | |
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247 | my $mon = delete $AnyEvent::MP::Kernel::LMON{$port} |
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248 | or !@reason |
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249 | or $AnyEvent::MP::Kernel::WARN->(8, "unmonitored local port $port died with reason: @reason"); |
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250 | |
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251 | $_->(@reason) for values %$mon; |
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252 | }; |
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253 | |
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254 | $DELAY_W ? push @DELAY, $delay_cb : &$delay_cb; |
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255 | } |
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256 | |
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257 | sub monitor { |
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258 | my ($self, $portid, $cb) = @_; |
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259 | |
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260 | my $delay_cb = sub { |
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261 | return $cb->(no_such_port => "cannot monitor nonexistent port", "$self->{id}#$portid") |
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262 | unless exists $AnyEvent::MP::Kernel::PORT{$portid}; |
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263 | |
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264 | $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb; |
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265 | }; |
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266 | |
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267 | $DELAY_W ? push @DELAY, $delay_cb : &$delay_cb; |
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268 | } |
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269 | |
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270 | sub unmonitor { |
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271 | my ($self, $portid, $cb) = @_; |
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272 | |
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273 | my $delay_cb = sub { |
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274 | delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0}; |
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275 | }; |
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276 | |
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277 | $DELAY_W ? push @DELAY, $delay_cb : &$delay_cb; |
143 | } |
278 | } |
144 | |
279 | |
145 | =head1 SEE ALSO |
280 | =head1 SEE ALSO |
146 | |
281 | |
147 | L<AnyEvent>. |
282 | L<AnyEvent::MP>. |
148 | |
283 | |
149 | =head1 AUTHOR |
284 | =head1 AUTHOR |
150 | |
285 | |
151 | Marc Lehmann <schmorp@schmorp.de> |
286 | Marc Lehmann <schmorp@schmorp.de> |
152 | http://home.schmorp.de/ |
287 | http://home.schmorp.de/ |