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 | |
… | |
… | |
19 | use AnyEvent::Socket (); |
21 | use AnyEvent::Socket (); |
20 | |
22 | |
21 | use AnyEvent::MP::Transport (); |
23 | use AnyEvent::MP::Transport (); |
22 | |
24 | |
23 | sub new { |
25 | sub new { |
24 | my ($class, $noderef) = @_; |
26 | my ($self, $id) = @_; |
25 | |
27 | |
26 | bless { noderef => $noderef }, $class |
28 | $self = bless { id => $id }, $self; |
27 | } |
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28 | |
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 | $self |
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34 | } |
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35 | |
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36 | sub init { |
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37 | # |
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38 | } |
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39 | |
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40 | sub send { |
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41 | &{ shift->{send} } |
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42 | } |
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43 | |
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44 | # nodes reachable via the network |
29 | package AnyEvent::MP::Node::Direct; |
45 | package AnyEvent::MP::Node::External; |
30 | |
46 | |
31 | use base "AnyEvent::MP::Node"; |
47 | use base "AnyEvent::MP::Node"; |
32 | |
48 | |
33 | sub send { |
49 | # called at init time, mostly sets {send} |
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50 | sub transport_reset { |
34 | my ($self, $msg) = @_; |
51 | my ($self) = @_; |
35 | |
52 | |
36 | if ($self->{transport}) { |
53 | delete $self->{transport}; |
37 | $self->{transport}->send ($msg); |
54 | |
38 | } elsif ($self->{queue}) { |
55 | Scalar::Util::weaken $self; |
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56 | |
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57 | $self->{send} = sub { |
39 | push @{ $self->{queue} }, $msg; |
58 | push @{$self->{queue}}, shift; |
40 | } else { |
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41 | $self->{queue} = [$msg]; |
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42 | $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 %$mon; |
43 | } |
78 | } |
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79 | |
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80 | AnyEvent::MP::Kernel::_inject_nodeevent ($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 => "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->can ("send"); |
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104 | |
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105 | $self->{send} = sub { |
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106 | $transport_send->($transport, $_[0]); |
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107 | }; |
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108 | |
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109 | AnyEvent::MP::Kernel::_inject_nodeevent ($self, 1); |
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110 | |
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111 | $transport->send ($_) |
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112 | for @{ delete $self->{queue} || [] }; |
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113 | } |
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114 | |
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115 | sub connect { |
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116 | my ($self, @addresses) = @_; |
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117 | |
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118 | return if $self->{transport}; |
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119 | |
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120 | Scalar::Util::weaken $self; |
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121 | |
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122 | my $monitor = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout}; |
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123 | |
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124 | $self->{connect_to} ||= AE::timer $monitor, 0, sub { |
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125 | $self->transport_error (transport_error => $self->{id}, "unable to connect"); |
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126 | }; |
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127 | |
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128 | return unless @addresses; |
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129 | |
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130 | if ($self->{connect_w}) { |
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131 | # sometimes we get told about new addresses after we started to connect |
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132 | unshift @{$self->{connect_addr}}, @addresses; |
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133 | return; |
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134 | } |
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135 | |
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136 | $self->{connect_addr} = \@addresses; # a bit weird, but efficient |
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137 | |
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138 | $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} with [@addresses]"); |
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139 | |
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140 | my $interval = $AnyEvent::MP::Kernel::CONFIG->{connect_interval}; |
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141 | |
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142 | $interval = ($monitor - $interval) / @addresses |
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143 | if ($monitor - $interval) / @addresses < $interval; |
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144 | |
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145 | $interval = 0.4 if $interval < 0.4; |
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146 | |
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147 | my @endpoints; |
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148 | |
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149 | $self->{connect_w} = AE::timer 0.050 * rand, $interval * (0.9 + 0.1 * rand), sub { |
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150 | @endpoints = @addresses |
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151 | unless @endpoints; |
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152 | |
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153 | my $endpoint = shift @endpoints; |
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154 | |
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155 | $AnyEvent::MP::Kernel::WARN->(9, "connecting to $self->{id} at $endpoint"); |
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156 | |
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157 | $self->{trial}{$endpoint} ||= do { |
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158 | my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint |
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159 | or return $AnyEvent::MP::Kernel::WARN->(1, "$self->{id}: not a resolved node reference."); |
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160 | |
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161 | AnyEvent::MP::Transport::mp_connect |
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162 | $host, $port, |
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163 | sub { delete $self->{trial}{$endpoint} }, |
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164 | }; |
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165 | }; |
44 | } |
166 | } |
45 | |
167 | |
46 | sub kill { |
168 | sub kill { |
47 | my ($self, $port, @reason) = @_; |
169 | my ($self, $port, @reason) = @_; |
48 | |
170 | |
… | |
… | |
53 | my ($self, $portid, $cb) = @_; |
175 | my ($self, $portid, $cb) = @_; |
54 | |
176 | |
55 | my $list = $self->{lmon}{$portid} ||= []; |
177 | my $list = $self->{lmon}{$portid} ||= []; |
56 | |
178 | |
57 | $self->send (["", mon1 => $portid]) |
179 | $self->send (["", mon1 => $portid]) |
58 | unless @$list; |
180 | unless @$list || !length $portid; |
59 | |
181 | |
60 | push @$list, $cb; |
182 | push @$list, $cb; |
61 | } |
183 | } |
62 | |
184 | |
63 | sub unmonitor { |
185 | sub unmonitor { |
… | |
… | |
72 | $self->send (["", mon0 => $portid]); |
194 | $self->send (["", mon0 => $portid]); |
73 | delete $self->{monitor}{$portid}; |
195 | delete $self->{monitor}{$portid}; |
74 | } |
196 | } |
75 | } |
197 | } |
76 | |
198 | |
77 | sub set_transport { |
199 | # used for direct slave connections as well |
78 | my ($self, $transport) = @_; |
200 | package AnyEvent::MP::Node::Direct; |
79 | |
201 | |
80 | $self->clr_transport |
202 | use base "AnyEvent::MP::Node::External"; |
81 | if $self->{transport}; |
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82 | |
203 | |
83 | delete $self->{trial}; |
204 | package AnyEvent::MP::Node::Self; |
84 | delete $self->{retry}; |
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85 | delete $self->{next_connect}; |
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86 | |
205 | |
87 | $self->{transport} = $transport; |
206 | use base "AnyEvent::MP::Node"; |
88 | |
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89 | $transport->send ($_) |
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90 | for @{ delete $self->{queue} || [] }; |
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91 | } |
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92 | |
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93 | sub fail { |
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94 | my ($self, @reason) = @_; |
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95 | |
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96 | delete $self->{queue}; |
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97 | |
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98 | if (my $mon = delete $self->{lmon}) { |
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99 | $_->(@reason) for map @$_, values %$mon; |
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100 | } |
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101 | } |
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102 | |
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103 | sub clr_transport { |
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104 | my ($self, @reason) = @_; |
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105 | |
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106 | delete $self->{transport}; |
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107 | $self->connect; |
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108 | } |
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109 | |
207 | |
110 | sub connect { |
208 | sub connect { |
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209 | # we are trivially connected |
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210 | } |
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211 | |
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212 | # delay every so often to avoid recursion, also used to delay after spawn |
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213 | our $DELAY; |
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214 | our @DELAY; |
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215 | our $DELAY_W; |
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216 | |
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217 | sub _send_delayed { |
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218 | local $AnyEvent::MP::Kernel::SRCNODE = $AnyEvent::MP::Kernel::NODE{""}; |
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219 | (shift @DELAY)->() |
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220 | while @DELAY; |
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221 | undef $DELAY_W; |
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222 | $DELAY = -50; |
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223 | } |
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224 | |
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225 | sub transport_reset { |
111 | my ($self) = @_; |
226 | my ($self) = @_; |
112 | |
227 | |
113 | Scalar::Util::weaken $self; |
228 | Scalar::Util::weaken $self; |
114 | |
229 | |
115 | $self->{retry} ||= [split /,/, $self->{noderef}]; |
230 | $self->{send} = sub { |
116 | |
231 | if ($DELAY++ >= 0) { |
117 | my $endpoint = shift @{ $self->{retry} }; |
232 | my $msg = $_[0]; |
118 | |
233 | push @DELAY, sub { AnyEvent::MP::Kernel::_inject (@$msg) }; |
119 | if (defined $endpoint) { |
234 | $DELAY_W ||= AE::timer 0, 0, \&_send_delayed; |
120 | $self->{trial}{$endpoint} ||= do { |
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121 | my ($host, $port) = AnyEvent::Socket::parse_hostport $endpoint |
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122 | or return $AnyEvent::MP::Base::WARN->("$self->{noderef}: not a resolved node reference."); |
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123 | |
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124 | my ($w, $g); |
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125 | |
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126 | $w = AE::timer $AnyEvent::MP::Base::CONNECT_TIMEOUT, 0, sub { |
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127 | delete $self->{trial}{$endpoint}; |
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128 | }; |
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129 | $g = AnyEvent::MP::Transport::mp_connect |
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130 | $host, $port, |
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131 | sub { |
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132 | delete $self->{trial}{$endpoint} |
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133 | unless @_; |
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134 | $g = shift; |
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135 | }; |
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136 | ; |
235 | return; |
137 | |
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138 | [$w, \$g] |
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139 | }; |
236 | } |
140 | } else { |
237 | |
141 | $self->fail (transport_error => $self->{noderef}, "unable to connect"); |
238 | local $AnyEvent::MP::Kernel::SRCNODE = $self; |
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239 | AnyEvent::MP::Kernel::_inject (@{ $_[0] }); |
142 | } |
240 | }; |
143 | |
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144 | $self->{next_connect} = AE::timer $AnyEvent::MP::Base::CONNECT_INTERVAL, 0, sub { |
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145 | delete $self->{retry}; |
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146 | $self->connect; |
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147 | }; |
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148 | } |
241 | } |
149 | |
242 | |
150 | package AnyEvent::MP::Node::Slave; |
243 | sub transport_connect { |
151 | |
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152 | use base "AnyEvent::MP::Node::Direct"; |
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153 | |
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154 | sub connect { |
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155 | my ($self) = @_; |
244 | my ($self, $tp) = @_; |
156 | |
245 | |
157 | $self->fail (transport_error => $self->{noderef}, "unable to connect to slave node"); |
246 | $AnyEvent::MP::Kernel::WARN->(9, "I refuse to talk to myself ($tp->{peerhost}:$tp->{peerport})"); |
158 | } |
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159 | |
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160 | package AnyEvent::MP::Node::Self; |
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161 | |
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162 | use base "AnyEvent::MP::Node"; |
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163 | |
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164 | sub set_transport { |
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165 | Carp::confess "FATAL error, set_transport was called on local node"; |
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166 | } |
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167 | |
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168 | sub send { |
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169 | local $AnyEvent::MP::Base::SRCNODE = $_[0]; |
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170 | AnyEvent::MP::Base::_inject (@{ $_[1] }); |
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171 | } |
247 | } |
172 | |
248 | |
173 | sub kill { |
249 | sub kill { |
174 | my ($self, $port, @reason) = @_; |
250 | my ($self, $port, @reason) = @_; |
175 | |
251 | |
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252 | my $delay_cb = sub { |
176 | delete $AnyEvent::MP::Base::PORT{$port}; |
253 | delete $AnyEvent::MP::Kernel::PORT{$port}; |
177 | delete $AnyEvent::MP::Base::PORT_DATA{$port}; |
254 | delete $AnyEvent::MP::Kernel::PORT_DATA{$port}; |
178 | |
255 | |
179 | my $mon = delete $AnyEvent::MP::Base::LMON{$port} |
256 | my $mon = delete $AnyEvent::MP::Kernel::LMON{$port} |
180 | or !@reason |
257 | or !@reason |
181 | or $AnyEvent::MP::Base::WARN->("unmonitored local port $port died with reason: @reason"); |
258 | or $AnyEvent::MP::Kernel::WARN->(8, "unmonitored local port $port died with reason: @reason"); |
182 | |
259 | |
183 | $_->(@reason) for values %$mon; |
260 | $_->(@reason) for values %$mon; |
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261 | }; |
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262 | |
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263 | $DELAY_W ? push @DELAY, $delay_cb : &$delay_cb; |
184 | } |
264 | } |
185 | |
265 | |
186 | sub monitor { |
266 | sub monitor { |
187 | my ($self, $portid, $cb) = @_; |
267 | my ($self, $portid, $cb) = @_; |
188 | |
268 | |
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269 | my $delay_cb = sub { |
189 | return $cb->(no_such_port => "cannot monitor nonexistent port") |
270 | return $cb->(no_such_port => "cannot monitor nonexistent port", "$self->{id}#$portid") |
190 | unless exists $AnyEvent::MP::Base::PORT{$portid}; |
271 | unless exists $AnyEvent::MP::Kernel::PORT{$portid}; |
191 | |
272 | |
192 | $AnyEvent::MP::Base::LMON{$portid}{$cb+0} = $cb; |
273 | $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0} = $cb; |
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274 | }; |
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275 | |
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276 | $DELAY_W ? push @DELAY, $delay_cb : &$delay_cb; |
193 | } |
277 | } |
194 | |
278 | |
195 | sub unmonitor { |
279 | sub unmonitor { |
196 | my ($self, $portid, $cb) = @_; |
280 | my ($self, $portid, $cb) = @_; |
197 | |
281 | |
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282 | my $delay_cb = sub { |
198 | delete $AnyEvent::MP::Base::LMON{$portid}{$cb+0}; |
283 | delete $AnyEvent::MP::Kernel::LMON{$portid}{$cb+0}; |
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284 | }; |
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285 | |
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286 | $DELAY_W ? push @DELAY, $delay_cb : &$delay_cb; |
199 | } |
287 | } |
200 | |
288 | |
201 | =head1 SEE ALSO |
289 | =head1 SEE ALSO |
202 | |
290 | |
203 | L<AnyEvent::MP>. |
291 | L<AnyEvent::MP>. |