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=head1 NAME |
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AnyEvent::MP::Kernel - the actual message passing kernel |
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=head1 SYNOPSIS |
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use AnyEvent::MP::Kernel; |
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=head1 DESCRIPTION |
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This module provides most of the basic functionality of AnyEvent::MP, |
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exposed through higher level interfaces such as L<AnyEvent::MP> and |
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L<Coro::MP>. |
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This module is mainly of interest when knowledge about connectivity, |
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connected nodes etc. is sought. |
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=head1 GLOBALS AND FUNCTIONS |
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=over 4 |
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=cut |
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package AnyEvent::MP::Kernel; |
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use common::sense; |
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use POSIX (); |
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use Carp (); |
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use MIME::Base64 (); |
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use AE (); |
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use AnyEvent::MP::Node; |
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use AnyEvent::MP::Transport; |
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use base "Exporter"; |
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our @EXPORT = qw( |
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%NODE %PORT %PORT_DATA $UNIQ $RUNIQ $ID |
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add_node load_func snd_to_func snd_on eval_on |
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NODE $NODE node_of snd kil port_is_local |
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configure |
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up_nodes mon_nodes node_is_up |
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); |
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=item $AnyEvent::MP::Kernel::WARN->($level, $msg) |
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This value is called with an error or warning message, when e.g. a |
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connection could not be created, authorisation failed and so on. |
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It I<must not> block or send messages -queue it and use an idle watcher if |
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you need to do any of these things. |
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C<$level> should be C<0> for messages to be logged always, C<1> for |
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unexpected messages and errors, C<2> for warnings, C<7> for messages about |
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node connectivity and services, C<8> for debugging messages and C<9> for |
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tracing messages. |
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The default simply logs the message to STDERR. |
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=item @AnyEvent::MP::Kernel::WARN |
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All code references in this array are called for every log message, from |
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the default C<$WARN> handler. This is an easy way to tie into the log |
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messages without disturbing others. |
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=cut |
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our $WARNLEVEL = exists $ENV{PERL_ANYEVENT_MP_WARNLEVEL} ? $ENV{PERL_ANYEVENT_MP_WARNLEVEL} : 5; |
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our @WARN; |
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our $WARN = sub { |
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&$_ for @WARN; |
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return if $WARNLEVEL < $_[0]; |
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my ($level, $msg) = @_; |
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$msg =~ s/\n$//; |
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printf STDERR "%s <%d> %s\n", |
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(POSIX::strftime "%Y-%m-%d %H:%M:%S", localtime time), |
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$level, |
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$msg; |
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}; |
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=item $AnyEvent::MP::Kernel::WARNLEVEL [default 5 or $ENV{PERL_ANYEVENT_MP_WARNLEVEL}] |
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The maximum level at which warning messages will be printed to STDERR by |
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the default warn handler. |
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=cut |
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sub load_func($) { |
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my $func = $_[0]; |
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unless (defined &$func) { |
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my $pkg = $func; |
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do { |
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$pkg =~ s/::[^:]+$// |
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or return sub { die "unable to resolve function '$func'" }; |
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local $@; |
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unless (eval "require $pkg; 1") { |
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my $error = $@; |
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$error =~ /^Can't locate .*.pm in \@INC \(/ |
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or return sub { die $error }; |
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} |
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} until defined &$func; |
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} |
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112
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\&$func |
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} |
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sub nonce($) { |
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my $nonce; |
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if (open my $fh, "</dev/urandom") { |
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sysread $fh, $nonce, $_[0]; |
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} else { |
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# shit... |
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$nonce = join "", map +(chr rand 256), 1 .. $_[0] |
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} |
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125
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$nonce |
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} |
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128
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sub alnumbits($) { |
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my $data = $_[0]; |
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if (eval "use Math::GMP 2.05; 1") { |
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$data = Math::GMP::get_str_gmp ( |
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(Math::GMP::new_from_scalar_with_base (+(unpack "H*", $data), 16)), |
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62 |
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); |
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} else { |
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$data = MIME::Base64::encode_base64 $data, ""; |
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$data =~ s/=//; |
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$data =~ s/x/x0/g; |
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$data =~ s/\//x1/g; |
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$data =~ s/\+/x2/g; |
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} |
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144
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$data |
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} |
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147
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sub gen_uniq { |
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alnumbits pack "nna*", $$ & 0xffff, time & 0xffff, nonce 2 |
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} |
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151
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our $CONFIG; # this node's configuration |
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153
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our $RUNIQ; # remote uniq value |
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our $UNIQ; # per-process/node unique cookie |
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our $NODE; |
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our $ID = "a"; |
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our %NODE; # node id to transport mapping, or "undef", for local node |
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our (%PORT, %PORT_DATA); # local ports |
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161
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our %RMON; # local ports monitored by remote nodes ($RMON{nodeid}{portid} == cb) |
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our %LMON; # monitored _local_ ports |
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164
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our %LISTENER; |
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our $LISTENER; # our listeners, as arrayref |
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our $SRCNODE; # holds the sending node during _inject |
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169
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sub _seed { |
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$RUNIQ = alnumbits nonce 96/8; |
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$UNIQ = gen_uniq; |
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$NODE = "anon/$RUNIQ"; |
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} |
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_seed; |
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sub NODE() { |
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$NODE |
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} |
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181
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sub node_of($) { |
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my ($node, undef) = split /#/, $_[0], 2; |
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184
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$node |
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} |
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187
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BEGIN { |
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*TRACE = $ENV{PERL_ANYEVENT_MP_TRACE} |
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? sub () { 1 } |
190
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: sub () { 0 }; |
191
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} |
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193
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our $DELAY_TIMER; |
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our @DELAY_QUEUE; |
195
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196
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sub _delay_run { |
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(shift @DELAY_QUEUE or return undef $DELAY_TIMER)->() while 1; |
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} |
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200
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sub delay($) { |
201
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push @DELAY_QUEUE, shift; |
202
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$DELAY_TIMER ||= AE::timer 0, 0, \&_delay_run; |
203
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} |
204
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205
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sub _inject { |
206
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warn "RCV $SRCNODE->{id} -> " . eval { JSON::XS->new->encode (\@_) } . "\n" if TRACE && @_;#d# |
207
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&{ $PORT{+shift} or return }; |
208
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} |
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210
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# this function adds a node-ref, so you can send stuff to it |
211
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# it is basically the central routing component. |
212
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sub add_node { |
213
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my ($node) = @_; |
214
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215
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$NODE{$node} ||= new AnyEvent::MP::Node::Direct $node |
216
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} |
217
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218
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sub snd(@) { |
219
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my ($nodeid, $portid) = split /#/, shift, 2; |
220
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221
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warn "SND $nodeid <- " . eval { JSON::XS->new->encode (\@_) } . "\n" if TRACE && @_;#d# |
222
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223
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defined $nodeid #d#UGLY |
224
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or Carp::croak "'undef' is not a valid node ID/port ID"; |
225
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226
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($NODE{$nodeid} || add_node $nodeid) |
227
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->{send} (["$portid", @_]); |
228
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} |
229
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230
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=item $is_local = port_is_local $port |
231
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232
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Returns true iff the port is a local port. |
233
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234
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=cut |
235
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236
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sub port_is_local($) { |
237
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my ($nodeid, undef) = split /#/, $_[0], 2; |
238
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239
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$NODE{$nodeid} == $NODE{""} |
240
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} |
241
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242
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=item snd_to_func $node, $func, @args |
243
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244
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Expects a node ID and a name of a function. Asynchronously tries to call |
245
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this function with the given arguments on that node. |
246
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247
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This function can be used to implement C<spawn>-like interfaces. |
248
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249
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=cut |
250
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251
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sub snd_to_func($$;@) { |
252
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my $nodeid = shift; |
253
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254
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# on $NODE, we artificially delay... (for spawn) |
255
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# this is very ugly - maybe we should simply delay ALL messages, |
256
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# to avoid deep recursion issues. but that's so... slow... |
257
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$AnyEvent::MP::Node::Self::DELAY = 1 |
258
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if $nodeid ne $NODE; |
259
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260
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defined $nodeid #d#UGLY |
261
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or Carp::croak "'undef' is not a valid node ID/port ID"; |
262
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263
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($NODE{$nodeid} || add_node $nodeid)->send (["", @_]); |
264
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} |
265
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266
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=item snd_on $node, @msg |
267
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268
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Executes C<snd> with the given C<@msg> (which must include the destination |
269
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port) on the given node. |
270
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271
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=cut |
272
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273
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sub snd_on($@) { |
274
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my $node = shift; |
275
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snd $node, snd => @_; |
276
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} |
277
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278
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=item eval_on $node, $string[, @reply] |
279
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280
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Evaluates the given string as Perl expression on the given node. When |
281
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@reply is specified, then it is used to construct a reply message with |
282
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|
C<"$@"> and any results from the eval appended. |
283
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284
|
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=cut |
285
|
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286
|
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|
|
sub eval_on($$;@) { |
287
|
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|
my $node = shift; |
288
|
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|
|
snd $node, eval => @_; |
289
|
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|
} |
290
|
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291
|
|
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|
sub kil(@) { |
292
|
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|
my ($nodeid, $portid) = split /#/, shift, 2; |
293
|
|
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|
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|
|
294
|
|
|
|
|
|
|
length $portid |
295
|
|
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|
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|
|
or Carp::croak "$nodeid#$portid: killing a node port is not allowed, caught"; |
296
|
|
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|
|
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297
|
|
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|
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|
|
($NODE{$nodeid} || add_node $nodeid) |
298
|
|
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|
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|
|
->kill ("$portid", @_); |
299
|
|
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|
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|
|
} |
300
|
|
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|
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|
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301
|
|
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|
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|
|
sub _nodename { |
302
|
|
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|
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|
|
require POSIX; |
303
|
|
|
|
|
|
|
(POSIX::uname ())[1] |
304
|
|
|
|
|
|
|
} |
305
|
|
|
|
|
|
|
|
306
|
|
|
|
|
|
|
sub _resolve($) { |
307
|
|
|
|
|
|
|
my ($nodeid) = @_; |
308
|
|
|
|
|
|
|
|
309
|
|
|
|
|
|
|
my $cv = AE::cv; |
310
|
|
|
|
|
|
|
my @res; |
311
|
|
|
|
|
|
|
|
312
|
|
|
|
|
|
|
$cv->begin (sub { |
313
|
|
|
|
|
|
|
my %seen; |
314
|
|
|
|
|
|
|
my @refs; |
315
|
|
|
|
|
|
|
for (sort { $a->[0] <=> $b->[0] } @res) { |
316
|
|
|
|
|
|
|
push @refs, $_->[1] unless $seen{$_->[1]}++ |
317
|
|
|
|
|
|
|
} |
318
|
|
|
|
|
|
|
shift->send (@refs); |
319
|
|
|
|
|
|
|
}); |
320
|
|
|
|
|
|
|
|
321
|
|
|
|
|
|
|
my $idx; |
322
|
|
|
|
|
|
|
for my $t (split /,/, $nodeid) { |
323
|
|
|
|
|
|
|
my $pri = ++$idx; |
324
|
|
|
|
|
|
|
|
325
|
|
|
|
|
|
|
$t = length $t ? _nodename . ":$t" : _nodename |
326
|
|
|
|
|
|
|
if $t =~ /^\d*$/; |
327
|
|
|
|
|
|
|
|
328
|
|
|
|
|
|
|
my ($host, $port) = AnyEvent::Socket::parse_hostport $t, 0 |
329
|
|
|
|
|
|
|
or Carp::croak "$t: unparsable transport descriptor"; |
330
|
|
|
|
|
|
|
|
331
|
|
|
|
|
|
|
$port = "0" if $port eq "*"; |
332
|
|
|
|
|
|
|
|
333
|
|
|
|
|
|
|
if ($host eq "*") { |
334
|
|
|
|
|
|
|
$cv->begin; |
335
|
|
|
|
|
|
|
# use fork_call, as Net::Interface is big, and we need it rarely. |
336
|
|
|
|
|
|
|
require AnyEvent::Util; |
337
|
|
|
|
|
|
|
AnyEvent::Util::fork_call ( |
338
|
|
|
|
|
|
|
sub { |
339
|
|
|
|
|
|
|
my @addr; |
340
|
|
|
|
|
|
|
|
341
|
|
|
|
|
|
|
require Net::Interface; |
342
|
|
|
|
|
|
|
|
343
|
|
|
|
|
|
|
for my $if (Net::Interface->interfaces) { |
344
|
|
|
|
|
|
|
# we statically lower-prioritise ipv6 here, TODO :() |
345
|
|
|
|
|
|
|
for $_ ($if->address (Net::Interface::AF_INET ())) { |
346
|
|
|
|
|
|
|
next if /^\x7f/; # skip localhost etc. |
347
|
|
|
|
|
|
|
push @addr, $_; |
348
|
|
|
|
|
|
|
} |
349
|
|
|
|
|
|
|
for ($if->address (Net::Interface::AF_INET6 ())) { |
350
|
|
|
|
|
|
|
#next if $if->scope ($_) <= 2; |
351
|
|
|
|
|
|
|
next unless /^[\x20-\x3f\xfc\xfd]/; # global unicast, site-local unicast |
352
|
|
|
|
|
|
|
push @addr, $_; |
353
|
|
|
|
|
|
|
} |
354
|
|
|
|
|
|
|
|
355
|
|
|
|
|
|
|
} |
356
|
|
|
|
|
|
|
@addr |
357
|
|
|
|
|
|
|
}, sub { |
358
|
|
|
|
|
|
|
for my $ip (@_) { |
359
|
|
|
|
|
|
|
push @res, [ |
360
|
|
|
|
|
|
|
$pri += 1e-5, |
361
|
|
|
|
|
|
|
AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $ip, $port |
362
|
|
|
|
|
|
|
]; |
363
|
|
|
|
|
|
|
} |
364
|
|
|
|
|
|
|
$cv->end; |
365
|
|
|
|
|
|
|
} |
366
|
|
|
|
|
|
|
); |
367
|
|
|
|
|
|
|
} else { |
368
|
|
|
|
|
|
|
$cv->begin; |
369
|
|
|
|
|
|
|
AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub { |
370
|
|
|
|
|
|
|
for (@_) { |
371
|
|
|
|
|
|
|
my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3]; |
372
|
|
|
|
|
|
|
push @res, [ |
373
|
|
|
|
|
|
|
$pri += 1e-5, |
374
|
|
|
|
|
|
|
AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service |
375
|
|
|
|
|
|
|
]; |
376
|
|
|
|
|
|
|
} |
377
|
|
|
|
|
|
|
$cv->end; |
378
|
|
|
|
|
|
|
}; |
379
|
|
|
|
|
|
|
} |
380
|
|
|
|
|
|
|
} |
381
|
|
|
|
|
|
|
|
382
|
|
|
|
|
|
|
$cv->end; |
383
|
|
|
|
|
|
|
|
384
|
|
|
|
|
|
|
$cv |
385
|
|
|
|
|
|
|
} |
386
|
|
|
|
|
|
|
|
387
|
|
|
|
|
|
|
sub configure(@) { |
388
|
|
|
|
|
|
|
unshift @_, "profile" if @_ & 1; |
389
|
|
|
|
|
|
|
my (%kv) = @_; |
390
|
|
|
|
|
|
|
|
391
|
|
|
|
|
|
|
delete $NODE{$NODE}; # we do not support doing stuff before configure |
392
|
|
|
|
|
|
|
_seed; |
393
|
|
|
|
|
|
|
|
394
|
|
|
|
|
|
|
my $profile = delete $kv{profile}; |
395
|
|
|
|
|
|
|
|
396
|
|
|
|
|
|
|
$profile = _nodename |
397
|
|
|
|
|
|
|
unless defined $profile; |
398
|
|
|
|
|
|
|
|
399
|
|
|
|
|
|
|
$CONFIG = AnyEvent::MP::Config::find_profile $profile, %kv; |
400
|
|
|
|
|
|
|
|
401
|
|
|
|
|
|
|
my $node = exists $CONFIG->{nodeid} ? $CONFIG->{nodeid} : $profile; |
402
|
|
|
|
|
|
|
|
403
|
|
|
|
|
|
|
$node or Carp::croak "$node: illegal node ID (see AnyEvent::MP manpage for syntax)\n"; |
404
|
|
|
|
|
|
|
|
405
|
|
|
|
|
|
|
$NODE = $node |
406
|
|
|
|
|
|
|
unless $node eq "anon/"; |
407
|
|
|
|
|
|
|
|
408
|
|
|
|
|
|
|
$NODE{$NODE} = $NODE{""}; |
409
|
|
|
|
|
|
|
$NODE{$NODE}{id} = $NODE; |
410
|
|
|
|
|
|
|
|
411
|
|
|
|
|
|
|
my $seeds = $CONFIG->{seeds}; |
412
|
|
|
|
|
|
|
my $binds = $CONFIG->{binds}; |
413
|
|
|
|
|
|
|
|
414
|
|
|
|
|
|
|
$binds ||= ["*"]; |
415
|
|
|
|
|
|
|
|
416
|
|
|
|
|
|
|
$WARN->(8, "node $NODE starting up."); |
417
|
|
|
|
|
|
|
|
418
|
|
|
|
|
|
|
$LISTENER = []; |
419
|
|
|
|
|
|
|
%LISTENER = (); |
420
|
|
|
|
|
|
|
|
421
|
|
|
|
|
|
|
for (map _resolve $_, @$binds) { |
422
|
|
|
|
|
|
|
for my $bind ($_->recv) { |
423
|
|
|
|
|
|
|
my ($host, $port) = AnyEvent::Socket::parse_hostport $bind |
424
|
|
|
|
|
|
|
or Carp::croak "$bind: unparsable local bind address"; |
425
|
|
|
|
|
|
|
|
426
|
|
|
|
|
|
|
my $listener = AnyEvent::MP::Transport::mp_server |
427
|
|
|
|
|
|
|
$host, |
428
|
|
|
|
|
|
|
$port, |
429
|
|
|
|
|
|
|
prepare => sub { |
430
|
|
|
|
|
|
|
my (undef, $host, $port) = @_; |
431
|
|
|
|
|
|
|
$bind = AnyEvent::Socket::format_hostport $host, $port; |
432
|
|
|
|
|
|
|
0 |
433
|
|
|
|
|
|
|
}, |
434
|
|
|
|
|
|
|
; |
435
|
|
|
|
|
|
|
$LISTENER{$bind} = $listener; |
436
|
|
|
|
|
|
|
push @$LISTENER, $bind; |
437
|
|
|
|
|
|
|
} |
438
|
|
|
|
|
|
|
} |
439
|
|
|
|
|
|
|
|
440
|
|
|
|
|
|
|
$WARN->(8, "node listens on [@$LISTENER]."); |
441
|
|
|
|
|
|
|
|
442
|
|
|
|
|
|
|
# the global service is mandatory currently |
443
|
|
|
|
|
|
|
require AnyEvent::MP::Global; |
444
|
|
|
|
|
|
|
|
445
|
|
|
|
|
|
|
# connect to all seednodes |
446
|
|
|
|
|
|
|
AnyEvent::MP::Global::set_seeds (map $_->recv, map _resolve $_, @$seeds); |
447
|
|
|
|
|
|
|
|
448
|
|
|
|
|
|
|
for (@{ $CONFIG->{services} }) { |
449
|
|
|
|
|
|
|
if (ref) { |
450
|
|
|
|
|
|
|
my ($func, @args) = @$_; |
451
|
|
|
|
|
|
|
(load_func $func)->(@args); |
452
|
|
|
|
|
|
|
} elsif (s/::$//) { |
453
|
|
|
|
|
|
|
eval "require $_"; |
454
|
|
|
|
|
|
|
die $@ if $@; |
455
|
|
|
|
|
|
|
} else { |
456
|
|
|
|
|
|
|
(load_func $_)->(); |
457
|
|
|
|
|
|
|
} |
458
|
|
|
|
|
|
|
} |
459
|
|
|
|
|
|
|
} |
460
|
|
|
|
|
|
|
|
461
|
|
|
|
|
|
|
############################################################################# |
462
|
|
|
|
|
|
|
# node monitoring and info |
463
|
|
|
|
|
|
|
|
464
|
|
|
|
|
|
|
=item node_is_known $nodeid |
465
|
|
|
|
|
|
|
|
466
|
|
|
|
|
|
|
Returns true iff the given node is currently known to the system. The only |
467
|
|
|
|
|
|
|
time a node is known but not up currently is when a conenction request is |
468
|
|
|
|
|
|
|
pending. |
469
|
|
|
|
|
|
|
|
470
|
|
|
|
|
|
|
=cut |
471
|
|
|
|
|
|
|
|
472
|
|
|
|
|
|
|
sub node_is_known($) { |
473
|
|
|
|
|
|
|
exists $NODE{$_[0]} |
474
|
|
|
|
|
|
|
} |
475
|
|
|
|
|
|
|
|
476
|
|
|
|
|
|
|
=item node_is_up $nodeid |
477
|
|
|
|
|
|
|
|
478
|
|
|
|
|
|
|
Returns true if the given node is "up", that is, the kernel thinks it has |
479
|
|
|
|
|
|
|
a working connection to it. |
480
|
|
|
|
|
|
|
|
481
|
|
|
|
|
|
|
If the node is known but not currently connected, returns C<0>. If the |
482
|
|
|
|
|
|
|
node is not known, returns C<undef>. |
483
|
|
|
|
|
|
|
|
484
|
|
|
|
|
|
|
=cut |
485
|
|
|
|
|
|
|
|
486
|
|
|
|
|
|
|
sub node_is_up($) { |
487
|
|
|
|
|
|
|
($NODE{$_[0]} or return)->{transport} |
488
|
|
|
|
|
|
|
? 1 : 0 |
489
|
|
|
|
|
|
|
} |
490
|
|
|
|
|
|
|
|
491
|
|
|
|
|
|
|
=item known_nodes |
492
|
|
|
|
|
|
|
|
493
|
|
|
|
|
|
|
Returns the node IDs of all nodes currently known to this node, including |
494
|
|
|
|
|
|
|
itself and nodes not currently connected. |
495
|
|
|
|
|
|
|
|
496
|
|
|
|
|
|
|
=cut |
497
|
|
|
|
|
|
|
|
498
|
|
|
|
|
|
|
sub known_nodes() { |
499
|
|
|
|
|
|
|
map $_->{id}, values %NODE |
500
|
|
|
|
|
|
|
} |
501
|
|
|
|
|
|
|
|
502
|
|
|
|
|
|
|
=item up_nodes |
503
|
|
|
|
|
|
|
|
504
|
|
|
|
|
|
|
Return the node IDs of all nodes that are currently connected (excluding |
505
|
|
|
|
|
|
|
the node itself). |
506
|
|
|
|
|
|
|
|
507
|
|
|
|
|
|
|
=cut |
508
|
|
|
|
|
|
|
|
509
|
|
|
|
|
|
|
sub up_nodes() { |
510
|
|
|
|
|
|
|
map $_->{id}, grep $_->{transport}, values %NODE |
511
|
|
|
|
|
|
|
} |
512
|
|
|
|
|
|
|
|
513
|
|
|
|
|
|
|
=item $guard = mon_nodes $callback->($nodeid, $is_up, @reason) |
514
|
|
|
|
|
|
|
|
515
|
|
|
|
|
|
|
Registers a callback that is called each time a node goes up (a connection |
516
|
|
|
|
|
|
|
is established) or down (the connection is lost). |
517
|
|
|
|
|
|
|
|
518
|
|
|
|
|
|
|
Node up messages can only be followed by node down messages for the same |
519
|
|
|
|
|
|
|
node, and vice versa. |
520
|
|
|
|
|
|
|
|
521
|
|
|
|
|
|
|
Note that monitoring a node is usually better done by monitoring it's node |
522
|
|
|
|
|
|
|
port. This function is mainly of interest to modules that are concerned |
523
|
|
|
|
|
|
|
about the network topology and low-level connection handling. |
524
|
|
|
|
|
|
|
|
525
|
|
|
|
|
|
|
Callbacks I<must not> block and I<should not> send any messages. |
526
|
|
|
|
|
|
|
|
527
|
|
|
|
|
|
|
The function returns an optional guard which can be used to unregister |
528
|
|
|
|
|
|
|
the monitoring callback again. |
529
|
|
|
|
|
|
|
|
530
|
|
|
|
|
|
|
Example: make sure you call function C<newnode> for all nodes that are up |
531
|
|
|
|
|
|
|
or go up (and down). |
532
|
|
|
|
|
|
|
|
533
|
|
|
|
|
|
|
newnode $_, 1 for up_nodes; |
534
|
|
|
|
|
|
|
mon_nodes \&newnode; |
535
|
|
|
|
|
|
|
|
536
|
|
|
|
|
|
|
=cut |
537
|
|
|
|
|
|
|
|
538
|
|
|
|
|
|
|
our %MON_NODES; |
539
|
|
|
|
|
|
|
|
540
|
|
|
|
|
|
|
sub mon_nodes($) { |
541
|
|
|
|
|
|
|
my ($cb) = @_; |
542
|
|
|
|
|
|
|
|
543
|
|
|
|
|
|
|
$MON_NODES{$cb+0} = $cb; |
544
|
|
|
|
|
|
|
|
545
|
|
|
|
|
|
|
defined wantarray && AnyEvent::Util::guard { delete $MON_NODES{$cb+0} } |
546
|
|
|
|
|
|
|
} |
547
|
|
|
|
|
|
|
|
548
|
|
|
|
|
|
|
sub _inject_nodeevent($$;@) { |
549
|
|
|
|
|
|
|
my ($node, $up, @reason) = @_; |
550
|
|
|
|
|
|
|
|
551
|
|
|
|
|
|
|
for my $cb (values %MON_NODES) { |
552
|
|
|
|
|
|
|
eval { $cb->($node->{id}, $up, @reason); 1 } |
553
|
|
|
|
|
|
|
or $WARN->(1, $@); |
554
|
|
|
|
|
|
|
} |
555
|
|
|
|
|
|
|
|
556
|
|
|
|
|
|
|
$WARN->(7, "$node->{id} is " . ($up ? "up" : "down") . " (@reason)"); |
557
|
|
|
|
|
|
|
} |
558
|
|
|
|
|
|
|
|
559
|
|
|
|
|
|
|
############################################################################# |
560
|
|
|
|
|
|
|
# self node code |
561
|
|
|
|
|
|
|
|
562
|
|
|
|
|
|
|
sub _kill { |
563
|
|
|
|
|
|
|
my $port = shift; |
564
|
|
|
|
|
|
|
|
565
|
|
|
|
|
|
|
delete $PORT{$port} |
566
|
|
|
|
|
|
|
or return; # killing nonexistent ports is O.K. |
567
|
|
|
|
|
|
|
delete $PORT_DATA{$port}; |
568
|
|
|
|
|
|
|
|
569
|
|
|
|
|
|
|
my $mon = delete $LMON{$port} |
570
|
|
|
|
|
|
|
or !@_ |
571
|
|
|
|
|
|
|
or $WARN->(2, "unmonitored local port $port died with reason: @_"); |
572
|
|
|
|
|
|
|
|
573
|
|
|
|
|
|
|
$_->(@_) for values %$mon; |
574
|
|
|
|
|
|
|
} |
575
|
|
|
|
|
|
|
|
576
|
|
|
|
|
|
|
sub _monitor { |
577
|
|
|
|
|
|
|
return $_[2](no_such_port => "cannot monitor nonexistent port", "$NODE#$_[1]") |
578
|
|
|
|
|
|
|
unless exists $PORT{$_[1]}; |
579
|
|
|
|
|
|
|
|
580
|
|
|
|
|
|
|
$LMON{$_[1]}{$_[2]+0} = $_[2]; |
581
|
|
|
|
|
|
|
} |
582
|
|
|
|
|
|
|
|
583
|
|
|
|
|
|
|
sub _unmonitor { |
584
|
|
|
|
|
|
|
delete $LMON{$_[1]}{$_[2]+0} |
585
|
|
|
|
|
|
|
if exists $LMON{$_[1]}; |
586
|
|
|
|
|
|
|
} |
587
|
|
|
|
|
|
|
|
588
|
|
|
|
|
|
|
our %node_req = ( |
589
|
|
|
|
|
|
|
# internal services |
590
|
|
|
|
|
|
|
|
591
|
|
|
|
|
|
|
# monitoring |
592
|
|
|
|
|
|
|
mon0 => sub { # stop monitoring a port for another node |
593
|
|
|
|
|
|
|
my $portid = shift; |
594
|
|
|
|
|
|
|
_unmonitor undef, $portid, delete $SRCNODE->{rmon}{$portid}; |
595
|
|
|
|
|
|
|
}, |
596
|
|
|
|
|
|
|
mon1 => sub { # start monitoring a port for another node |
597
|
|
|
|
|
|
|
my $portid = shift; |
598
|
|
|
|
|
|
|
Scalar::Util::weaken (my $node = $SRCNODE); |
599
|
|
|
|
|
|
|
_monitor undef, $portid, $node->{rmon}{$portid} = sub { |
600
|
|
|
|
|
|
|
delete $node->{rmon}{$portid}; |
601
|
|
|
|
|
|
|
$node->send (["", kil0 => $portid, @_]) |
602
|
|
|
|
|
|
|
if $node && $node->{transport}; |
603
|
|
|
|
|
|
|
}; |
604
|
|
|
|
|
|
|
}, |
605
|
|
|
|
|
|
|
# another node has killed a monitored port |
606
|
|
|
|
|
|
|
kil0 => sub { |
607
|
|
|
|
|
|
|
my $cbs = delete $SRCNODE->{lmon}{+shift} |
608
|
|
|
|
|
|
|
or return; |
609
|
|
|
|
|
|
|
|
610
|
|
|
|
|
|
|
$_->(@_) for @$cbs; |
611
|
|
|
|
|
|
|
}, |
612
|
|
|
|
|
|
|
|
613
|
|
|
|
|
|
|
# "public" services - not actually public |
614
|
|
|
|
|
|
|
|
615
|
|
|
|
|
|
|
# another node wants to kill a local port |
616
|
|
|
|
|
|
|
kil => \&_kill, |
617
|
|
|
|
|
|
|
|
618
|
|
|
|
|
|
|
# relay message to another node / generic echo |
619
|
|
|
|
|
|
|
snd => \&snd, |
620
|
|
|
|
|
|
|
snd_multiple => sub { |
621
|
|
|
|
|
|
|
snd @$_ for @_ |
622
|
|
|
|
|
|
|
}, |
623
|
|
|
|
|
|
|
|
624
|
|
|
|
|
|
|
# informational |
625
|
|
|
|
|
|
|
info => sub { |
626
|
|
|
|
|
|
|
snd @_, $NODE; |
627
|
|
|
|
|
|
|
}, |
628
|
|
|
|
|
|
|
known_nodes => sub { |
629
|
|
|
|
|
|
|
snd @_, known_nodes; |
630
|
|
|
|
|
|
|
}, |
631
|
|
|
|
|
|
|
up_nodes => sub { |
632
|
|
|
|
|
|
|
snd @_, up_nodes; |
633
|
|
|
|
|
|
|
}, |
634
|
|
|
|
|
|
|
|
635
|
|
|
|
|
|
|
# random utilities |
636
|
|
|
|
|
|
|
eval => sub { |
637
|
|
|
|
|
|
|
my @res = do { package main; eval shift }; |
638
|
|
|
|
|
|
|
snd @_, "$@", @res if @_; |
639
|
|
|
|
|
|
|
}, |
640
|
|
|
|
|
|
|
time => sub { |
641
|
|
|
|
|
|
|
snd @_, AE::time; |
642
|
|
|
|
|
|
|
}, |
643
|
|
|
|
|
|
|
devnull => sub { |
644
|
|
|
|
|
|
|
# |
645
|
|
|
|
|
|
|
}, |
646
|
|
|
|
|
|
|
"" => sub { |
647
|
|
|
|
|
|
|
# empty messages are keepalives or similar devnull-applications |
648
|
|
|
|
|
|
|
}, |
649
|
|
|
|
|
|
|
); |
650
|
|
|
|
|
|
|
|
651
|
|
|
|
|
|
|
$NODE{""} = $NODE{$NODE} = new AnyEvent::MP::Node::Self $NODE; |
652
|
|
|
|
|
|
|
$PORT{""} = sub { |
653
|
|
|
|
|
|
|
my $tag = shift; |
654
|
|
|
|
|
|
|
eval { &{ $node_req{$tag} ||= load_func $tag } }; |
655
|
|
|
|
|
|
|
$WARN->(2, "error processing node message: $@") if $@; |
656
|
|
|
|
|
|
|
}; |
657
|
|
|
|
|
|
|
|
658
|
|
|
|
|
|
|
=back |
659
|
|
|
|
|
|
|
|
660
|
|
|
|
|
|
|
=head1 SEE ALSO |
661
|
|
|
|
|
|
|
|
662
|
|
|
|
|
|
|
L<AnyEvent::MP>. |
663
|
|
|
|
|
|
|
|
664
|
|
|
|
|
|
|
=head1 AUTHOR |
665
|
|
|
|
|
|
|
|
666
|
|
|
|
|
|
|
Marc Lehmann <schmorp@schmorp.de> |
667
|
|
|
|
|
|
|
http://home.schmorp.de/ |
668
|
|
|
|
|
|
|
|
669
|
|
|
|
|
|
|
=cut |
670
|
|
|
|
|
|
|
|
671
|
|
|
|
|
|
|
1 |
672
|
|
|
|
|
|
|
|