… | |
… | |
4 | |
4 | |
5 | =head1 SYNOPSIS |
5 | =head1 SYNOPSIS |
6 | |
6 | |
7 | use AnyEvent::MP; |
7 | use AnyEvent::MP; |
8 | |
8 | |
9 | NODE # returns this node identifier |
|
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10 | $NODE # contains this node identifier |
9 | $NODE # contains this node's noderef |
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10 | NODE # returns this node's noderef |
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11 | NODE $port # returns the noderef of the port |
11 | |
12 | |
12 | snd $port, type => data...; |
13 | snd $port, type => data...; |
|
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14 | |
|
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15 | $SELF # receiving/own port id in rcv callbacks |
13 | |
16 | |
14 | rcv $port, smartmatch => $cb->($port, @msg); |
17 | rcv $port, smartmatch => $cb->($port, @msg); |
15 | |
18 | |
16 | # examples: |
19 | # examples: |
17 | rcv $port2, ping => sub { snd $_[0], "pong"; 0 }; |
20 | rcv $port2, ping => sub { snd $_[0], "pong"; 0 }; |
… | |
… | |
27 | This module (-family) implements a simple message passing framework. |
30 | This module (-family) implements a simple message passing framework. |
28 | |
31 | |
29 | Despite its simplicity, you can securely message other processes running |
32 | Despite its simplicity, you can securely message other processes running |
30 | on the same or other hosts. |
33 | on the same or other hosts. |
31 | |
34 | |
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35 | At the moment, this module family is severly brokena nd underdocumented, |
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36 | so do not use. This was uploaded mainly to reserve the CPAN namespace - |
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37 | stay tuned! |
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38 | |
32 | =head1 CONCEPTS |
39 | =head1 CONCEPTS |
33 | |
40 | |
34 | =over 4 |
41 | =over 4 |
35 | |
42 | |
36 | =item port |
43 | =item port |
37 | |
44 | |
38 | A port is something you can send messages to with the C<snd> function, and |
45 | A port is something you can send messages to with the C<snd> function, and |
39 | you can register C<rcv> handlers with. All C<rcv> handlers will receive |
46 | you can register C<rcv> handlers with. All C<rcv> handlers will receive |
40 | messages they match, messages will not be queued. |
47 | messages they match, messages will not be queued. |
41 | |
48 | |
42 | =item port id - C<pid@host#portname> |
49 | =item port id - C<noderef#portname> |
43 | |
50 | |
44 | A port id is always the node id, a hash-mark (C<#>) as separator, followed |
51 | A port id is always the noderef, a hash-mark (C<#>) as separator, followed |
45 | by a port name. |
52 | by a port name (a printable string of unspecified format). |
46 | |
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47 | A port name can be a well known port (basically an identifier/bareword), |
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48 | or a generated name, consisting of node id, a dot (C<.>), and an |
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49 | identifier. |
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50 | |
53 | |
51 | =item node |
54 | =item node |
52 | |
55 | |
53 | A node is a single process containing at least one port - the node |
56 | A node is a single process containing at least one port - the node |
54 | port. You can send messages to node ports to let them create new ports, |
57 | port. You can send messages to node ports to let them create new ports, |
55 | among other things. |
58 | among other things. |
56 | |
59 | |
57 | Initially, nodes are either private (single-process only) or hidden |
60 | Initially, nodes are either private (single-process only) or hidden |
58 | (connected to a father node only). Only when they epxlicitly "go public" |
61 | (connected to a master node only). Only when they epxlicitly "become |
59 | can you send them messages form unrelated other nodes. |
62 | public" can you send them messages from unrelated other nodes. |
60 | |
63 | |
61 | Public nodes automatically connect to all other public nodes in a network |
64 | =item noderef - C<host:port,host:port...>, C<id@noderef>, C<id> |
62 | when they connect, creating a full mesh. |
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63 | |
65 | |
64 | =item node id - C<host:port>, C<id@host>, C<id> |
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65 | |
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66 | A node ID is a string that either uniquely identifies a given node (For |
66 | A noderef is a string that either uniquely identifies a given node (for |
67 | private and hidden nodes), or contains a recipe on how to reach a given |
67 | private and hidden nodes), or contains a recipe on how to reach a given |
68 | node (for public nodes). |
68 | node (for public nodes). |
69 | |
69 | |
70 | =back |
70 | =back |
71 | |
71 | |
72 | =head1 FUNCTIONS |
72 | =head1 VARIABLES/FUNCTIONS |
73 | |
73 | |
74 | =over 4 |
74 | =over 4 |
75 | |
75 | |
76 | =cut |
76 | =cut |
77 | |
77 | |
78 | package AnyEvent::MP; |
78 | package AnyEvent::MP; |
79 | |
79 | |
80 | use AnyEvent::MP::Util (); |
|
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81 | use AnyEvent::MP::Node; |
80 | use AnyEvent::MP::Base; |
82 | use AnyEvent::MP::Transport; |
|
|
83 | |
81 | |
84 | use utf8; |
|
|
85 | use common::sense; |
82 | use common::sense; |
86 | |
83 | |
87 | use Carp (); |
84 | use Carp (); |
88 | |
85 | |
89 | use AE (); |
86 | use AE (); |
90 | |
87 | |
91 | use base "Exporter"; |
88 | use base "Exporter"; |
92 | |
89 | |
93 | our $VERSION = '0.0'; |
90 | our $VERSION = '0.02'; |
94 | our @EXPORT = qw(NODE $NODE $PORT snd rcv _any_); |
91 | our @EXPORT = qw( |
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92 | NODE $NODE *SELF node_of _any_ |
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93 | become_slave become_public |
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94 | snd rcv mon kil reg psub |
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95 | port |
|
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96 | ); |
95 | |
97 | |
96 | our $DEFAULT_SECRET; |
98 | our $SELF; |
97 | our $DEFAULT_PORT = "4040"; |
|
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98 | |
99 | |
99 | our $CONNECT_INTERVAL = 5; # new connect every 5s, at least |
100 | sub _self_die() { |
100 | our $CONNECT_TIMEOUT = 30; # includes handshake |
101 | my $msg = $@; |
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102 | $msg =~ s/\n+$// unless ref $msg; |
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103 | kil $SELF, die => $msg; |
|
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104 | } |
101 | |
105 | |
102 | sub default_secret { |
106 | =item $thisnode = NODE / $NODE |
103 | unless (defined $DEFAULT_SECRET) { |
107 | |
104 | if (open my $fh, "<$ENV{HOME}/.aemp-secret") { |
108 | The C<NODE> function returns, and the C<$NODE> variable contains |
105 | sysread $fh, $DEFAULT_SECRET, -s $fh; |
109 | the noderef of the local node. The value is initialised by a call |
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110 | to C<become_public> or C<become_slave>, after which all local port |
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111 | identifiers become invalid. |
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112 | |
|
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113 | =item $noderef = node_of $portid |
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114 | |
|
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115 | Extracts and returns the noderef from a portid or a noderef. |
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116 | |
|
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117 | =item $SELF |
|
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118 | |
|
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119 | Contains the current port id while executing C<rcv> callbacks or C<psub> |
|
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120 | blocks. |
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121 | |
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122 | =item SELF, %SELF, @SELF... |
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123 | |
|
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124 | Due to some quirks in how perl exports variables, it is impossible to |
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125 | just export C<$SELF>, all the symbols called C<SELF> are exported by this |
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126 | module, but only C<$SELF> is currently used. |
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127 | |
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128 | =item snd $portid, type => @data |
|
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129 | |
|
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130 | =item snd $portid, @msg |
|
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131 | |
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132 | Send the given message to the given port ID, which can identify either |
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133 | a local or a remote port, and can be either a string or soemthignt hat |
|
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134 | stringifies a sa port ID (such as a port object :). |
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135 | |
|
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136 | While the message can be about anything, it is highly recommended to use a |
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137 | string as first element (a portid, or some word that indicates a request |
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138 | type etc.). |
|
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139 | |
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140 | The message data effectively becomes read-only after a call to this |
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141 | function: modifying any argument is not allowed and can cause many |
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142 | problems. |
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143 | |
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144 | The type of data you can transfer depends on the transport protocol: when |
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145 | JSON is used, then only strings, numbers and arrays and hashes consisting |
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146 | of those are allowed (no objects). When Storable is used, then anything |
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147 | that Storable can serialise and deserialise is allowed, and for the local |
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148 | node, anything can be passed. |
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149 | |
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150 | =item kil $portid[, @reason] |
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151 | |
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152 | Kill the specified port with the given C<@reason>. |
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153 | |
|
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154 | If no C<@reason> is specified, then the port is killed "normally" (linked |
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155 | ports will not be kileld, or even notified). |
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156 | |
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157 | Otherwise, linked ports get killed with the same reason (second form of |
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158 | C<mon>, see below). |
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159 | |
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160 | Runtime errors while evaluating C<rcv> callbacks or inside C<psub> blocks |
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161 | will be reported as reason C<< die => $@ >>. |
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162 | |
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163 | Transport/communication errors are reported as C<< transport_error => |
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164 | $message >>. |
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165 | |
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166 | =item $guard = mon $portid, $cb->(@reason) |
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167 | |
|
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168 | =item $guard = mon $portid, $otherport |
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169 | |
|
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170 | =item $guard = mon $portid, $otherport, @msg |
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171 | |
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172 | Monitor the given port and do something when the port is killed. |
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173 | |
|
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174 | In the first form, the callback is simply called with any number |
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175 | of C<@reason> elements (no @reason means that the port was deleted |
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176 | "normally"). Note also that I<< the callback B<must> never die >>, so use |
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177 | C<eval> if unsure. |
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178 | |
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179 | In the second form, the other port will be C<kil>'ed with C<@reason>, iff |
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180 | a @reason was specified, i.e. on "normal" kils nothing happens, while |
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181 | under all other conditions, the other port is killed with the same reason. |
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182 | |
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183 | In the last form, a message of the form C<@msg, @reason> will be C<snd>. |
|
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184 | |
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185 | Example: call a given callback when C<$port> is killed. |
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186 | |
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187 | mon $port, sub { warn "port died because of <@_>\n" }; |
|
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188 | |
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189 | Example: kill ourselves when C<$port> is killed abnormally. |
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190 | |
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191 | mon $port, $self; |
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192 | |
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193 | Example: send us a restart message another C<$port> is killed. |
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194 | |
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195 | mon $port, $self => "restart"; |
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196 | |
|
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197 | =cut |
|
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198 | |
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199 | sub mon { |
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200 | my ($noderef, $port, $cb) = ((split /#/, shift, 2), shift); |
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201 | |
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202 | my $node = $NODE{$noderef} || add_node $noderef; |
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203 | |
|
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204 | #TODO: ports must not be references |
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205 | if (!ref $cb or "AnyEvent::MP::Port" eq ref $cb) { |
|
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206 | if (@_) { |
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207 | # send a kill info message |
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208 | my (@msg) = ($cb, @_); |
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209 | $cb = sub { snd @msg, @_ }; |
106 | } else { |
210 | } else { |
107 | $DEFAULT_SECRET = AnyEvent::MP::Util::nonce 32; |
211 | # simply kill other port |
|
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212 | my $port = $cb; |
|
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213 | $cb = sub { kil $port, @_ if @_ }; |
108 | } |
214 | } |
109 | } |
215 | } |
110 | |
216 | |
111 | $DEFAULT_SECRET |
217 | $node->monitor ($port, $cb); |
112 | } |
|
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113 | |
218 | |
114 | our $UNIQ = sprintf "%x.%x", $$, time; # per-process/node unique cookie |
219 | defined wantarray |
115 | our $PUBLIC = 0; |
220 | and AnyEvent::Util::guard { $node->unmonitor ($port, $cb) } |
116 | our $NODE; |
|
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117 | our $PORT; |
|
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118 | |
|
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119 | our %NODE; # node id to transport mapping, or "undef", for local node |
|
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120 | our %PORT; # local ports |
|
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121 | our %LISTENER; # local transports |
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122 | |
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123 | sub NODE() { $NODE } |
|
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124 | |
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125 | { |
|
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126 | use POSIX (); |
|
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127 | my $nodename = (POSIX::uname)[1]; |
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128 | $NODE = "$$\@$nodename"; |
|
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129 | } |
221 | } |
130 | |
222 | |
131 | sub _ANY_() { 1 } |
223 | =item $guard = mon_guard $port, $ref, $ref... |
132 | sub _any_() { \&_ANY_ } |
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133 | |
224 | |
134 | sub add_node { |
225 | Monitors the given C<$port> and keeps the passed references. When the port |
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226 | is killed, the references will be freed. |
|
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227 | |
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228 | Optionally returns a guard that will stop the monitoring. |
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229 | |
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230 | This function is useful when you create e.g. timers or other watchers and |
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231 | want to free them when the port gets killed: |
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232 | |
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233 | $port->rcv (start => sub { |
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234 | my $timer; $timer = mon_guard $port, AE::timer 1, 1, sub { |
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235 | undef $timer if 0.9 < rand; |
|
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236 | }); |
|
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237 | }); |
|
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238 | |
|
|
239 | =cut |
|
|
240 | |
|
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241 | sub mon_guard { |
135 | my ($noderef) = @_; |
242 | my ($port, @refs) = @_; |
136 | |
243 | |
137 | return $NODE{$noderef} |
244 | mon $port, sub { 0 && @refs } |
138 | if exists $NODE{$noderef}; |
245 | } |
139 | |
246 | |
140 | for (split /,/, $noderef) { |
247 | =item $local_port = port |
141 | return $NODE{$noderef} = $NODE{$_} |
248 | |
142 | if exists $NODE{$_}; |
249 | Create a new local port object that supports message matching. |
|
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250 | |
|
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251 | =item $portid = port { my @msg = @_; $finished } |
|
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252 | |
|
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253 | Creates a "mini port", that is, a very lightweight port without any |
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254 | pattern matching behind it, and returns its ID. |
|
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255 | |
|
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256 | The block will be called for every message received on the port. When the |
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257 | callback returns a true value its job is considered "done" and the port |
|
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258 | will be destroyed. Otherwise it will stay alive. |
|
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259 | |
|
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260 | The message will be passed as-is, no extra argument (i.e. no port id) will |
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261 | be passed to the callback. |
|
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262 | |
|
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263 | If you need the local port id in the callback, this works nicely: |
|
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264 | |
|
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265 | my $port; $port = miniport { |
|
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266 | snd $otherport, reply => $port; |
|
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267 | }; |
|
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268 | |
|
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269 | =cut |
|
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270 | |
|
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271 | sub port(;&) { |
|
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272 | my $id = "$UNIQ." . $ID++; |
|
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273 | my $port = "$NODE#$id"; |
|
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274 | |
|
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275 | if (@_) { |
|
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276 | my $cb = shift; |
|
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277 | $PORT{$id} = sub { |
|
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278 | local $SELF = $port; |
|
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279 | eval { |
|
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280 | &$cb |
|
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281 | and kil $id; |
|
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282 | }; |
|
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283 | _self_die if $@; |
|
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284 | }; |
|
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285 | } else { |
|
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286 | my $self = bless { |
|
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287 | id => "$NODE#$id", |
|
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288 | }, "AnyEvent::MP::Port"; |
|
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289 | |
|
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290 | $PORT_DATA{$id} = $self; |
|
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291 | $PORT{$id} = sub { |
|
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292 | local $SELF = $port; |
|
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293 | |
|
|
294 | eval { |
|
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295 | for (@{ $self->{rc0}{$_[0]} }) { |
|
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296 | $_ && &{$_->[0]} |
|
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297 | && undef $_; |
|
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298 | } |
|
|
299 | |
|
|
300 | for (@{ $self->{rcv}{$_[0]} }) { |
|
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301 | $_ && [@_[1 .. @{$_->[1]}]] ~~ $_->[1] |
|
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302 | && &{$_->[0]} |
|
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303 | && undef $_; |
|
|
304 | } |
|
|
305 | |
|
|
306 | for (@{ $self->{any} }) { |
|
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307 | $_ && [@_[0 .. $#{$_->[1]}]] ~~ $_->[1] |
|
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308 | && &{$_->[0]} |
|
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309 | && undef $_; |
|
|
310 | } |
|
|
311 | }; |
|
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312 | _self_die if $@; |
|
|
313 | }; |
143 | } |
314 | } |
144 | |
315 | |
145 | # for indirect sends, use a different class |
316 | $port |
146 | my $node = new AnyEvent::MP::Node::Direct $noderef; |
|
|
147 | |
|
|
148 | $NODE{$_} = $node |
|
|
149 | for $noderef, split /,/, $noderef; |
|
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150 | |
|
|
151 | $node |
|
|
152 | } |
317 | } |
153 | |
318 | |
|
|
319 | =item reg $portid, $name |
|
|
320 | |
|
|
321 | Registers the given port under the name C<$name>. If the name already |
|
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322 | exists it is replaced. |
|
|
323 | |
|
|
324 | A port can only be registered under one well known name. |
|
|
325 | |
|
|
326 | A port automatically becomes unregistered when it is killed. |
|
|
327 | |
|
|
328 | =cut |
|
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329 | |
|
|
330 | sub reg(@) { |
|
|
331 | my ($portid, $name) = @_; |
|
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332 | |
|
|
333 | $REG{$name} = $portid; |
|
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334 | } |
|
|
335 | |
|
|
336 | =item rcv $portid, tagstring => $callback->(@msg), ... |
|
|
337 | |
|
|
338 | =item rcv $portid, $smartmatch => $callback->(@msg), ... |
|
|
339 | |
|
|
340 | =item rcv $portid, [$smartmatch...] => $callback->(@msg), ... |
|
|
341 | |
|
|
342 | Register callbacks to be called on matching messages on the given port. |
|
|
343 | |
|
|
344 | The callback has to return a true value when its work is done, after |
|
|
345 | which is will be removed, or a false value in which case it will stay |
|
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346 | registered. |
|
|
347 | |
|
|
348 | The global C<$SELF> (exported by this module) contains C<$portid> while |
|
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349 | executing the callback. |
|
|
350 | |
|
|
351 | Runtime errors wdurign callback execution will result in the port being |
|
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352 | C<kil>ed. |
|
|
353 | |
|
|
354 | If the match is an array reference, then it will be matched against the |
|
|
355 | first elements of the message, otherwise only the first element is being |
|
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356 | matched. |
|
|
357 | |
|
|
358 | Any element in the match that is specified as C<_any_> (a function |
|
|
359 | exported by this module) matches any single element of the message. |
|
|
360 | |
|
|
361 | While not required, it is highly recommended that the first matching |
|
|
362 | element is a string identifying the message. The one-string-only match is |
|
|
363 | also the most efficient match (by far). |
|
|
364 | |
|
|
365 | =cut |
|
|
366 | |
154 | sub snd($@) { |
367 | sub rcv($@) { |
155 | my ($noderef, $port) = split /#/, shift, 2; |
368 | my ($noderef, $port) = split /#/, shift, 2; |
156 | |
369 | |
157 | add_node $noderef |
370 | ($NODE{$noderef} || add_node $noderef) == $NODE{""} |
158 | unless exists $NODE{$noderef}; |
371 | or Carp::croak "$noderef#$port: rcv can only be called on local ports, caught"; |
159 | |
372 | |
160 | $NODE{$noderef}->send ([$port, [@_]]); |
373 | my $self = $PORT_DATA{$port} |
161 | } |
374 | or Carp::croak "$noderef#$port: rcv can only be called on message matching ports, caught"; |
162 | |
375 | |
163 | sub _inject { |
376 | "AnyEvent::MP::Port" eq ref $self |
164 | my ($port, $msg) = @{+shift}; |
377 | or Carp::croak "$noderef#$port: rcv can only be called on message matching ports, caught"; |
165 | |
378 | |
166 | $port = $PORT{$port} |
379 | while (@_) { |
167 | or return; |
380 | my ($match, $cb) = splice @_, 0, 2; |
168 | |
381 | |
169 | use Data::Dumper; |
382 | if (!ref $match) { |
170 | warn Dumper $msg; |
383 | push @{ $self->{rc0}{$match} }, [$cb]; |
171 | } |
384 | } elsif (("ARRAY" eq ref $match && !ref $match->[0])) { |
172 | |
385 | my ($type, @match) = @$match; |
173 | sub normalise_noderef($) { |
386 | @match |
174 | my ($noderef) = @_; |
387 | ? push @{ $self->{rcv}{$match->[0]} }, [$cb, \@match] |
175 | |
388 | : push @{ $self->{rc0}{$match->[0]} }, [$cb]; |
176 | my $cv = AE::cv; |
|
|
177 | my @res; |
|
|
178 | |
|
|
179 | $cv->begin (sub { |
|
|
180 | my %seen; |
|
|
181 | my @refs; |
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|
182 | for (sort { $a->[0] <=> $b->[0] } @res) { |
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183 | push @refs, $_->[1] unless $seen{$_->[1]}++ |
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184 | } |
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185 | shift->send (join ",", @refs); |
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186 | }); |
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187 | |
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188 | $noderef = $DEFAULT_PORT unless length $noderef; |
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189 | |
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190 | my $idx; |
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191 | for my $t (split /,/, $noderef) { |
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192 | my $pri = ++$idx; |
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193 | |
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194 | #TODO: this should be outside normalise_noderef and in become_public |
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195 | if ($t =~ /^\d*$/) { |
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196 | my $nodename = (POSIX::uname)[1]; |
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197 | |
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198 | $cv->begin; |
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199 | AnyEvent::Socket::resolve_sockaddr $nodename, $t || "aemp=$DEFAULT_PORT", "tcp", 0, undef, sub { |
|
|
200 | for (@_) { |
|
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201 | my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3]; |
|
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202 | push @res, [ |
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203 | $pri += 1e-5, |
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204 | AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service |
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205 | ]; |
|
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206 | } |
|
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207 | $cv->end; |
|
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208 | }; |
|
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209 | |
|
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210 | # my (undef, undef, undef, undef, @ipv4) = gethostbyname $nodename; |
|
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211 | # |
|
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212 | # for (@ipv4) { |
|
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213 | # push @res, [ |
|
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214 | # $pri, |
|
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215 | # AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $_, $t || $DEFAULT_PORT, |
|
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216 | # ]; |
|
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217 | # } |
|
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218 | } else { |
389 | } else { |
219 | my ($host, $port) = AnyEvent::Socket::parse_hostport $t, "aemp=$DEFAULT_PORT" |
390 | push @{ $self->{any} }, [$cb, $match]; |
220 | or Carp::croak "$t: unparsable transport descriptor"; |
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221 | |
|
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222 | $cv->begin; |
|
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223 | AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub { |
|
|
224 | for (@_) { |
|
|
225 | my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3]; |
|
|
226 | push @res, [ |
|
|
227 | $pri += 1e-5, |
|
|
228 | AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service |
|
|
229 | ]; |
|
|
230 | } |
|
|
231 | $cv->end; |
|
|
232 | } |
|
|
233 | } |
391 | } |
234 | } |
392 | } |
235 | |
|
|
236 | $cv->end; |
|
|
237 | |
|
|
238 | $cv |
|
|
239 | } |
393 | } |
240 | |
394 | |
241 | sub become_public { |
395 | =item $closure = psub { BLOCK } |
242 | return if $PUBLIC; |
|
|
243 | |
396 | |
244 | my $noderef = join ",", ref $_[0] ? @{+shift} : shift; |
397 | Remembers C<$SELF> and creates a closure out of the BLOCK. When the |
245 | my @args = @_; |
398 | closure is executed, sets up the environment in the same way as in C<rcv> |
|
|
399 | callbacks, i.e. runtime errors will cause the port to get C<kil>ed. |
246 | |
400 | |
247 | $NODE = (normalise_noderef $noderef)->recv; |
401 | This is useful when you register callbacks from C<rcv> callbacks: |
248 | |
402 | |
249 | my $self = new AnyEvent::MP::Node::Self noderef => $NODE; |
403 | rcv delayed_reply => sub { |
250 | |
404 | my ($delay, @reply) = @_; |
251 | $NODE{""} = $self; # empty string == local node |
405 | my $timer = AE::timer $delay, 0, psub { |
252 | |
406 | snd @reply, $SELF; |
253 | for my $t (split /,/, $NODE) { |
|
|
254 | $NODE{$t} = $self; |
|
|
255 | |
|
|
256 | my ($host, $port) = AnyEvent::Socket::parse_hostport $t; |
|
|
257 | |
|
|
258 | $LISTENER{$t} = AnyEvent::MP::Transport::mp_server $host, $port, |
|
|
259 | @args, |
|
|
260 | on_error => sub { |
|
|
261 | die "on_error<@_>\n";#d# |
|
|
262 | }, |
|
|
263 | on_connect => sub { |
|
|
264 | my ($tp) = @_; |
|
|
265 | |
|
|
266 | $NODE{$tp->{remote_id}} = $_[0]; |
|
|
267 | }, |
|
|
268 | sub { |
|
|
269 | my ($tp) = @_; |
|
|
270 | |
|
|
271 | $NODE{"$tp->{peerhost}:$tp->{peerport}"} = $tp; |
|
|
272 | }, |
|
|
273 | ; |
407 | }; |
|
|
408 | }; |
|
|
409 | |
|
|
410 | =cut |
|
|
411 | |
|
|
412 | sub psub(&) { |
|
|
413 | my $cb = shift; |
|
|
414 | |
|
|
415 | my $port = $SELF |
|
|
416 | or Carp::croak "psub can only be called from within rcv or psub callbacks, not"; |
|
|
417 | |
|
|
418 | sub { |
|
|
419 | local $SELF = $port; |
|
|
420 | |
|
|
421 | if (wantarray) { |
|
|
422 | my @res = eval { &$cb }; |
|
|
423 | _self_die if $@; |
|
|
424 | @res |
|
|
425 | } else { |
|
|
426 | my $res = eval { &$cb }; |
|
|
427 | _self_die if $@; |
|
|
428 | $res |
|
|
429 | } |
274 | } |
430 | } |
275 | |
|
|
276 | $PUBLIC = 1; |
|
|
277 | } |
431 | } |
|
|
432 | |
|
|
433 | =back |
|
|
434 | |
|
|
435 | =head1 FUNCTIONS FOR NODES |
|
|
436 | |
|
|
437 | =over 4 |
|
|
438 | |
|
|
439 | =item become_public endpoint... |
|
|
440 | |
|
|
441 | Tells the node to become a public node, i.e. reachable from other nodes. |
|
|
442 | |
|
|
443 | If no arguments are given, or the first argument is C<undef>, then |
|
|
444 | AnyEvent::MP tries to bind on port C<4040> on all IP addresses that the |
|
|
445 | local nodename resolves to. |
|
|
446 | |
|
|
447 | Otherwise the first argument must be an array-reference with transport |
|
|
448 | endpoints ("ip:port", "hostname:port") or port numbers (in which case the |
|
|
449 | local nodename is used as hostname). The endpoints are all resolved and |
|
|
450 | will become the node reference. |
|
|
451 | |
|
|
452 | =cut |
|
|
453 | |
|
|
454 | =back |
|
|
455 | |
|
|
456 | =head1 NODE MESSAGES |
|
|
457 | |
|
|
458 | Nodes understand the following messages sent to them. Many of them take |
|
|
459 | arguments called C<@reply>, which will simply be used to compose a reply |
|
|
460 | message - C<$reply[0]> is the port to reply to, C<$reply[1]> the type and |
|
|
461 | the remaining arguments are simply the message data. |
|
|
462 | |
|
|
463 | =over 4 |
|
|
464 | |
|
|
465 | =cut |
|
|
466 | |
|
|
467 | =item lookup => $name, @reply |
|
|
468 | |
|
|
469 | Replies with the port ID of the specified well-known port, or C<undef>. |
|
|
470 | |
|
|
471 | =item devnull => ... |
|
|
472 | |
|
|
473 | Generic data sink/CPU heat conversion. |
|
|
474 | |
|
|
475 | =item relay => $port, @msg |
|
|
476 | |
|
|
477 | Simply forwards the message to the given port. |
|
|
478 | |
|
|
479 | =item eval => $string[ @reply] |
|
|
480 | |
|
|
481 | Evaluates the given string. If C<@reply> is given, then a message of the |
|
|
482 | form C<@reply, $@, @evalres> is sent. |
|
|
483 | |
|
|
484 | Example: crash another node. |
|
|
485 | |
|
|
486 | snd $othernode, eval => "exit"; |
|
|
487 | |
|
|
488 | =item time => @reply |
|
|
489 | |
|
|
490 | Replies the the current node time to C<@reply>. |
|
|
491 | |
|
|
492 | Example: tell the current node to send the current time to C<$myport> in a |
|
|
493 | C<timereply> message. |
|
|
494 | |
|
|
495 | snd $NODE, time => $myport, timereply => 1, 2; |
|
|
496 | # => snd $myport, timereply => 1, 2, <time> |
278 | |
497 | |
279 | =back |
498 | =back |
280 | |
499 | |
281 | =head1 SEE ALSO |
500 | =head1 SEE ALSO |
282 | |
501 | |