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 |
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10 | |
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11 | This is an internal utility module, horrible to look at, so don't. |
10 | |
12 | |
11 | =cut |
13 | =cut |
12 | |
14 | |
13 | package AnyEvent::MP::Node; |
15 | package AnyEvent::MP::Node; |
14 | |
16 | |
… | |
… | |
18 | use AnyEvent::Util (); |
20 | use AnyEvent::Util (); |
19 | use AnyEvent::Socket (); |
21 | use AnyEvent::Socket (); |
20 | |
22 | |
21 | use AnyEvent::MP::Transport (); |
23 | use AnyEvent::MP::Transport (); |
22 | |
24 | |
23 | use base Exporter::; |
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24 | |
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25 | our $VERSION = '0.0'; |
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26 | |
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27 | sub new { |
25 | sub new { |
28 | my ($class, $noderef) = @_; |
26 | my ($self, $id) = @_; |
29 | |
27 | |
30 | bless { noderef => $noderef }, $class |
28 | $self = bless { id => $id }, $self; |
31 | } |
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32 | |
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 | $self |
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34 | } |
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35 | |
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36 | sub init { |
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37 | # |
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38 | } |
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39 | |
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40 | sub send { |
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41 | &{ shift->{send} } |
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42 | } |
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43 | |
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44 | # nodes reachable via the network |
33 | package AnyEvent::MP::Node::Direct; |
45 | package AnyEvent::MP::Node::Remote; |
34 | |
46 | |
35 | use base "AnyEvent::MP::Node"; |
47 | use base "AnyEvent::MP::Node"; |
36 | |
48 | |
37 | sub send { |
49 | # called at init time, mostly sets {send} |
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50 | sub transport_reset { |
38 | my ($self, $msg) = @_; |
51 | my ($self) = @_; |
39 | |
52 | |
40 | if ($self->{transport}) { |
53 | delete $self->{transport}; |
41 | $self->{transport}->send ($msg); |
54 | |
42 | } elsif ($self->{queue}) { |
55 | Scalar::Util::weaken $self; |
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56 | |
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57 | $self->{send} = sub { |
43 | push @{ $self->{queue} }, $msg; |
58 | push @{$self->{queue}}, shift; |
44 | } else { |
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45 | $self->{queue} = [$msg]; |
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46 | $self->connect; |
59 | $self->connect; |
47 | } |
60 | }; |
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61 | } |
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62 | |
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63 | # called each time we fail to establish a connection, |
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64 | # or the existing connection failed |
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65 | sub transport_error { |
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66 | my ($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 %$mon; |
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78 | } |
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79 | |
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80 | AnyEvent::MP::Kernel::_inject_nodeevent ($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} || $self->{connect_to}; |
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86 | } |
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87 | |
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88 | # called after handshake was successful |
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89 | sub transport_connect { |
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90 | my ($self, $transport) = @_; |
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91 | |
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92 | delete $self->{trial}; |
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93 | |
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94 | $self->transport_error (transport_error => $self->{id}, "switched connections") |
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95 | if $self->{transport}; |
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96 | |
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97 | delete $self->{connect_addr}; |
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98 | delete $self->{connect_w}; |
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99 | delete $self->{connect_to}; |
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100 | |
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101 | $self->{transport} = $transport; |
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102 | |
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103 | my $transport_send = $transport->{send}; |
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104 | |
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105 | AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1); |
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106 | |
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107 | $self->{send} = $transport_send; |
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108 | |
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109 | $transport_send->($_) |
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110 | for @{ delete $self->{queue} || [] }; |
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111 | } |
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112 | |
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113 | sub connect { |
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114 | my ($self) = @_; |
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115 | |
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116 | return if $self->{transport}; |
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117 | return if $self->{connect_w}; |
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118 | |
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119 | Scalar::Util::weaken $self; |
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120 | |
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121 | my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout}; |
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122 | |
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123 | $self->{connect_to} ||= AE::timer $monitor, 0, sub { |
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124 | $self->transport_error (transport_error => $self->{id}, "unable to connect"); |
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125 | }; |
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126 | |
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127 | # maybe @$addresses? |
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128 | my @addresses = @{ $AnyEvent::MP::Kernel::GLOBAL_DB{"'l"}{$self->{id}} }; |
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129 | |
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130 | unless (@addresses) { |
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131 | # on global nodes, all bets are off now - we either know the node, or we don't |
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132 | unless ($AnyEvent::MP::Kernel::GLOBAL) { |
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133 | AnyEvent::MP::Kernel::g_find ($self->{id}); |
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134 | } |
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135 | return; |
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136 | } |
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137 | |
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138 | $self->{connect_addr} = \@addresses; # a bit weird, but efficient |
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139 | |
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140 | $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]"); |
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141 | |
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142 | my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval}; |
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143 | |
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144 | $interval = ($monitor - $interval) / @addresses |
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145 | if ($monitor - $interval) / @addresses < $interval; |
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146 | |
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147 | $interval = 0.4 if $interval < 0.4; |
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148 | |
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149 | my @endpoints; |
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150 | |
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151 | $self->{connect_w} = AE::timer 0, $interval * (0.9 + 0.1 * rand), sub { |
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152 | @endpoints = @addresses |
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153 | unless @endpoints; |
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154 | |
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155 | my $endpoint = shift @endpoints; |
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156 | |
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157 | $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint"); |
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158 | |
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159 | $self->{trial}{$endpoint} ||= do { |
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160 | my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint |
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161 | or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference."); |
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162 | |
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163 | AnyEvent::MP::Transport::mp_connect |
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164 | $host, $port, |
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165 | sub { delete $self->{trial}{$endpoint} }, |
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166 | }; |
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167 | }; |
48 | } |
168 | } |
49 | |
169 | |
50 | sub kill { |
170 | sub kill { |
51 | my ($self, $port, @reason) = @_; |
171 | my ($self, $port, @reason) = @_; |
52 | |
172 | |
53 | $self->send (["", kil => $port, @reason]); |
173 | $self->{send} (["", kil => $port, @reason]); |
54 | } |
174 | } |
55 | |
175 | |
56 | sub monitor { |
176 | sub monitor { |
57 | my ($self, $portid, $cb) = @_; |
177 | my ($self, $portid, $cb) = @_; |
58 | |
178 | |
59 | return $cb->(transport_error => "node unreachable") |
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60 | if $self->{failed}; |
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61 | |
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62 | my $list = $self->{lmon}{$portid} ||= []; |
179 | my $list = $self->{lmon}{$portid} ||= []; |
63 | |
180 | |
64 | $self->send (["", mon1 => $portid]) |
181 | $self->send (["", mon1 => $portid]) |
65 | unless @$list; |
182 | unless @$list || !length $portid; |
66 | |
183 | |
67 | push @$list, $cb; |
184 | push @$list, $cb; |
68 | } |
185 | } |
69 | |
186 | |
70 | sub unmonitor { |
187 | sub unmonitor { |
… | |
… | |
79 | $self->send (["", mon0 => $portid]); |
196 | $self->send (["", mon0 => $portid]); |
80 | delete $self->{monitor}{$portid}; |
197 | delete $self->{monitor}{$portid}; |
81 | } |
198 | } |
82 | } |
199 | } |
83 | |
200 | |
84 | sub set_transport { |
201 | package AnyEvent::MP::Node::Self; |
85 | my ($self, $transport) = @_; |
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86 | |
202 | |
87 | $self->clr_transport |
203 | use base "AnyEvent::MP::Node"; |
88 | if $self->{transport}; |
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89 | |
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90 | if ( |
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91 | exists $self->{remote_uniq} |
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92 | && $self->{remote_uniq} ne $transport->{remote_uniq} |
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93 | ) { |
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94 | # uniq changed, different node |
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95 | $self->fail ("node restart detected"); |
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96 | } |
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97 | |
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98 | delete $self->{trial}; |
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99 | delete $self->{next_connect}; |
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100 | delete $self->{failed}; |
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101 | |
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102 | $self->{remote_uniq} = $transport->{remote_uniq}; |
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103 | $self->{transport} = $transport; |
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104 | |
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105 | $transport->send ($_) |
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106 | for @{ delete $self->{queue} || [] }; |
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107 | } |
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108 | |
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109 | sub fail { |
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110 | my ($self, @reason) = @_; |
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111 | |
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112 | delete $self->{queue}; |
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113 | |
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114 | $self->{failed} = 1; |
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115 | |
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116 | if (my $mon = delete $self->{lmon}) { |
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117 | $_->(@reason) for map @$_, values %$mon; |
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118 | } |
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119 | } |
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120 | |
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121 | sub clr_transport { |
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122 | my ($self, @reason) = @_; |
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123 | |
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124 | delete $self->{transport}; |
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125 | $self->connect; |
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126 | } |
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127 | |
204 | |
128 | sub connect { |
205 | sub connect { |
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206 | # we are trivially connected |
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207 | } |
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208 | |
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209 | # delay every so often to avoid recursion, also used to delay after spawn |
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210 | our $DELAY = -50; |
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211 | our @DELAY; |
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212 | our $DELAY_W; |
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213 | |
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214 | sub _send_delayed { |
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215 | local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE{""}; |
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216 | (shift @DELAY)->() |
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217 | while @DELAY; |
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218 | undef $DELAY_W; |
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219 | $DELAY = -50; |
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220 | } |
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221 | |
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222 | sub transport_reset { |
129 | my ($self) = @_; |
223 | my ($self) = @_; |
130 | |
224 | |
131 | Scalar::Util::weaken $self; |
225 | Scalar::Util::weaken $self; |
132 | |
226 | |
133 | $self->{retry} ||= [split /,/, $self->{noderef}]; |
227 | $self->{send} = sub { |
134 | |
228 | if ($DELAY++ >= 0) { |
135 | my $endpoint = shift @{ $self->{retry} }; |
229 | my $msg = $_[0]; |
136 | |
230 | push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) }; |
137 | if (defined $endpoint) { |
231 | $DELAY_W ||= AE::timer 0, 0, \&_send_delayed; |
138 | $self->{trial}{$endpoint} ||= do { |
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139 | my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint |
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140 | or return $AnyEvent::MP::Base::WARN->("$self->{noderef}: not a resolved node reference."); |
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141 | |
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142 | my ($w, $g); |
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143 | |
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144 | $w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub { |
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145 | delete $self->{trial}{$endpoint}; |
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146 | }; |
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147 | $g = AnyEvent::MP::Transport::mp_connect |
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148 | $host, $port, |
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149 | sub { |
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150 | delete $self->{trial}{$endpoint} |
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151 | unless @_; |
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152 | $g = shift; |
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153 | }; |
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154 | ; |
232 | return; |
155 | |
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156 | [$w, \$g] |
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157 | }; |
233 | } |
158 | } else { |
234 | |
159 | delete $self->{retry}; |
235 | local $AnyEvent::MP::Kernel::SRCNODE = $self; |
160 | $self->fail (transport_error => $self->{noderef}, "unable to connect"); |
236 | AnyEvent::MP::Kernel::_inject (@{ $_[0] }); |
161 | } |
237 | }; |
162 | |
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163 | $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub { |
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164 | $self->connect; |
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165 | }; |
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166 | } |
238 | } |
167 | |
239 | |
168 | package AnyEvent::MP::Node::Self; |
240 | sub transport_connect { |
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241 | my ($self, $tp) = @_; |
169 | |
242 | |
170 | use base "AnyEvent::MP::Node"; |
243 | $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})"); |
171 | |
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172 | sub set_transport { |
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173 | die "FATAL error, set_transport was called"; |
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174 | } |
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175 | |
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176 | sub send { |
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177 | local $AnyEvent::MP::Base::SRCNODE = $_[0]; |
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178 | AnyEvent::MP::Base::_inject (@{ $_[1] }); |
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179 | } |
244 | } |
180 | |
245 | |
181 | sub kill { |
246 | sub kill { |
182 | my ($self, $port, @reason) = @_; |
247 | my (undef, @args) = @_; |
183 | |
248 | |
184 | delete $AnyEvent::MP::Base::PORT{$port}; |
249 | # we _always_ delay kil's, to avoid calling mon callbacks |
185 | delete $AnyEvent::MP::Base::PORT_DATA{$port}; |
250 | # from anything but the event loop context. |
186 | |
251 | $DELAY = 1; |
187 | my $mon = delete $AnyEvent::MP::Base::LMON{$port} |
252 | push @DELAY, sub { AnyEvent::MP::Kernel::_kill (@args) }; |
188 | or !@reason |
253 | $DELAY_W ||= AE::timer 0, 0, \&_send_delayed; |
189 | or $AnyEvent::MP::Base::WARN->("unmonitored local port $port died with reason: @reason"); |
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190 | |
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191 | $_->(@reason) for values %$mon; |
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192 | } |
254 | } |
193 | |
255 | |
194 | sub monitor { |
256 | sub monitor { |
195 | my ($self, $portid, $cb) = @_; |
257 | # maybe always delay, too? |
196 | |
258 | if ($DELAY_W) { |
197 | return $cb->() |
259 | my @args = @_; |
198 | unless exists $AnyEvent::MP::Base::PORT{$portid}; |
260 | push @DELAY, sub { AnyEvent::MP::Kernel::_monitor (@args) }; |
199 | |
261 | return; |
200 | $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb; |
262 | } |
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263 | &AnyEvent::MP::Kernel::_monitor; |
201 | } |
264 | } |
202 | |
265 | |
203 | sub unmonitor { |
266 | sub unmonitor { |
204 | my ($self, $portid, $cb) = @_; |
267 | # no need to always delay |
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268 | if ($DELAY_W) { |
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269 | my @args = @_; |
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270 | push @DELAY, sub { AnyEvent::MP::Kernel::_unmonitor (@args) }; |
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271 | return; |
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272 | } |
205 | |
273 | |
206 | delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0}; |
274 | &AnyEvent::MP::Kernel::_unmonitor; |
207 | } |
275 | } |
208 | |
276 | |
209 | =head1 SEE ALSO |
277 | =head1 SEE ALSO |
210 | |
278 | |
211 | L<AnyEvent>. |
279 | L<AnyEvent::MP>. |
212 | |
280 | |
213 | =head1 AUTHOR |
281 | =head1 AUTHOR |
214 | |
282 | |
215 | Marc Lehmann <schmorp@schmorp.de> |
283 | Marc Lehmann <schmorp@schmorp.de> |
216 | http://home.schmorp.de/ |
284 | http://home.schmorp.de/ |