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1.1 |
=head1 NAME |
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1.3 |
AnyEvent::MP::Kernel - the actual message passing kernel |
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1.1 |
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=head1 SYNOPSIS |
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1.3 |
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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1.3 |
This module is mainly of interest when knowledge about connectivity, |
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connected nodes etc. are needed. |
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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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1.16 |
use POSIX (); |
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1.1 |
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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1.12 |
our $VERSION = '0.7'; |
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1.1 |
our @EXPORT = qw( |
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1.13 |
%NODE %PORT %PORT_DATA $UNIQ $RUNIQ $ID |
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connect_node add_node load_func snd_to_func |
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1.10 |
NODE $NODE node_of snd kil |
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1.1 |
resolve_node initialise_node |
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1.13 |
known_nodes up_nodes mon_nodes node_is_known node_is_up |
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1.1 |
); |
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our $DEFAULT_PORT = "4040"; |
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our $CONNECT_INTERVAL = 2; # new connect every 2s, at least |
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our $NETWORK_LATENCY = 3; # activity timeout |
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our $MONITOR_TIMEOUT = 15; # fail monitoring after this time |
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1.16 |
=item $AnyEvent::MP::Kernel::WARN->($level, $msg) |
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This value is called with an error or warning message, when e.g. a connection |
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could not be created, authorisation failed and so on. |
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C<$level> sould be C<0> for messages ot 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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=cut |
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our $WARN = sub { |
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my ($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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$msg; |
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}; |
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sub load_func($) { |
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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/::[^:]+$// |
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or return sub { die "unable to resolve '$func'" }; |
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eval "require $pkg"; |
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} until defined &$func; |
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} |
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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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our $nonce_init; |
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unless ($nonce_init++) { |
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srand time ^ $$ ^ unpack "%L*", qx"ps -edalf" . qx"ipconfig /all"; |
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} |
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$nonce = join "", map +(chr rand 256), 1 .. $_[0] |
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} |
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$nonce |
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} |
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sub asciibits($) { |
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my $data = $_[0]; |
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if (eval "use Math::GMP 2.05; 1") { |
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$data = Math::GMP::get_str_gmp ( |
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(Math::GMP::new_from_scalar_with_base (+(unpack "H*", $data), 16)), |
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); |
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} else { |
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$data = MIME::Base64::encode_base64 $data, ""; |
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$data =~ s/=//; |
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$data =~ s/\//s/g; |
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$data =~ s/\+/p/g; |
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} |
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$data |
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} |
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sub gen_uniq { |
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asciibits pack "wNa*", $$, time, nonce 2 |
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} |
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1.3 |
=item $AnyEvent::MP::Kernel::PUBLIC |
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A boolean indicating whether this is a full/public node, which can create |
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and accept direct connections form othe rnodes. |
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=item $AnyEvent::MP::Kernel::SLAVE |
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A boolean indicating whether this node is a slave node, i.e. does most of it's |
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message sending/receiving through some master node. |
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=item $AnyEvent::MP::Kernel::MASTER |
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Defined only in slave mode, in which cas eit contains the noderef of the |
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master node. |
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=cut |
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1.1 |
our $PUBLIC = 0; |
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our $SLAVE = 0; |
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our $MASTER; # master noderef when $SLAVE |
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our $NODE = asciibits nonce 16; |
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our $RUNIQ = $NODE; # remote uniq value |
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our $UNIQ = gen_uniq; # per-process/node unique cookie |
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our $ID = "a"; |
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our %NODE; # node id to transport mapping, or "undef", for local node |
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our (%PORT, %PORT_DATA); # local ports |
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our %RMON; # local ports monitored by remote nodes ($RMON{noderef}{portid} == cb) |
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our %LMON; # monitored _local_ ports |
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our %LISTENER; |
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our $SRCNODE; # holds the sending node during _inject |
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sub NODE() { |
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$NODE |
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} |
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sub node_of($) { |
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my ($noderef, undef) = split /#/, $_[0], 2; |
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$noderef |
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} |
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sub TRACE() { 0 } |
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sub _inject { |
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warn "RCV $SRCNODE->{noderef} -> @_\n" if TRACE;#d# |
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&{ $PORT{+shift} or return }; |
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} |
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sub add_node { |
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my ($noderef) = @_; |
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return $NODE{$noderef} |
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if exists $NODE{$noderef}; |
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for (split /,/, $noderef) { |
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return $NODE{$noderef} = $NODE{$_} |
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if exists $NODE{$_}; |
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} |
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# new node, check validity |
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my $node; |
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if ($noderef =~ /^slave\/.+$/) { |
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$node = new AnyEvent::MP::Node::Indirect $noderef; |
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} else { |
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for (split /,/, $noderef) { |
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my ($host, $port) = AnyEvent::Socket::parse_hostport $_ |
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or Carp::croak "$noderef: not a resolved node reference ('$_' not parsable)"; |
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$port > 0 |
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or Carp::croak "$noderef: not a resolved node reference ('$_' contains non-numeric port)"; |
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AnyEvent::Socket::parse_address $host |
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or Carp::croak "$noderef: not a resolved node reference ('$_' contains unresolved address)"; |
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} |
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$node = new AnyEvent::MP::Node::Direct $noderef; |
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} |
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$NODE{$_} = $node |
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for $noderef, split /,/, $noderef; |
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$node |
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} |
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1.13 |
sub connect_node { |
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&add_node->connect; |
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} |
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1.1 |
sub snd(@) { |
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my ($noderef, $portid) = split /#/, shift, 2; |
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warn "SND $noderef <- $portid @_\n" if TRACE;#d# |
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($NODE{$noderef} || add_node $noderef) |
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1.2 |
->{send} (["$portid", @_]); |
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1.1 |
} |
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1.11 |
=item snd_to_func $noderef, $func, @args |
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Expects a noderef and a name of a function. Asynchronously tries to call |
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this function with the given arguments on that node. |
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This fucntion can be used to implement C<spawn>-like interfaces. |
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=cut |
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sub snd_to_func { |
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my $noderef = shift; |
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($NODE{$noderef} || add_node $noderef) |
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->send (["", @_]); |
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} |
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1.1 |
sub kil(@) { |
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my ($noderef, $portid) = split /#/, shift, 2; |
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length $portid |
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or Carp::croak "$noderef#$portid: killing a node port is not allowed, caught"; |
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($NODE{$noderef} || add_node $noderef) |
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->kill ("$portid", @_); |
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} |
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1.7 |
sub _nodename { |
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require POSIX; |
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(POSIX::uname ())[1] |
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} |
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1.1 |
sub resolve_node($) { |
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my ($noderef) = @_; |
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my $cv = AE::cv; |
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my @res; |
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$cv->begin (sub { |
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my %seen; |
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my @refs; |
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for (sort { $a->[0] <=> $b->[0] } @res) { |
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push @refs, $_->[1] unless $seen{$_->[1]}++ |
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} |
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shift->send (join ",", @refs); |
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}); |
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$noderef = $DEFAULT_PORT unless length $noderef; |
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my $idx; |
287 |
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for my $t (split /,/, $noderef) { |
288 |
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my $pri = ++$idx; |
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1.7 |
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$t = length $t ? _nodename . ":$t" : _nodename |
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if $t =~ /^\d*$/; |
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1.1 |
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1.7 |
my ($host, $port) = AnyEvent::Socket::parse_hostport $t, "aemp=$DEFAULT_PORT" |
294 |
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or Carp::croak "$t: unparsable transport descriptor"; |
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$cv->begin; |
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AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub { |
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for (@_) { |
299 |
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my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3]; |
300 |
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push @res, [ |
301 |
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$pri += 1e-5, |
302 |
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AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service |
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]; |
304 |
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1.1 |
} |
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1.7 |
$cv->end; |
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}; |
307 |
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1.1 |
} |
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$cv->end; |
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311 |
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$cv |
312 |
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} |
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sub initialise_node(@) { |
315 |
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my ($noderef, @others) = @_; |
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1.7 |
my $profile = AnyEvent::MP::Config::find_profile |
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+(defined $noderef ? $noderef : _nodename); |
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1.6 |
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$noderef = $profile->{noderef} |
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1.7 |
if exists $profile->{noderef}; |
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1.6 |
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1.9 |
push @others, @{ $profile->{seeds} }; |
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1.3 |
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1.1 |
if ($noderef =~ /^slave\/(.*)$/) { |
326 |
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$SLAVE = AE::cv; |
327 |
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my $name = $1; |
328 |
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$name = $NODE unless length $name; |
329 |
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$noderef = AE::cv; |
330 |
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$noderef->send ("slave/$name"); |
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@others |
333 |
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or Carp::croak "seed nodes must be specified for slave nodes"; |
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335 |
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} else { |
336 |
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$PUBLIC = 1; |
337 |
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$noderef = resolve_node $noderef; |
338 |
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} |
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340 |
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@others = map $_->recv, map +(resolve_node $_), @others; |
341 |
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342 |
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$NODE = $noderef->recv; |
343 |
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344 |
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for my $t (split /,/, $NODE) { |
345 |
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$NODE{$t} = $NODE{""}; |
346 |
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347 |
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my ($host, $port) = AnyEvent::Socket::parse_hostport $t; |
348 |
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349 |
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$LISTENER{$t} = AnyEvent::MP::Transport::mp_server $host, $port, |
350 |
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sub { |
351 |
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my ($tp) = @_; |
352 |
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353 |
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# TODO: urgs |
354 |
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my $node = add_node $tp->{remote_node}; |
355 |
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$node->{trial}{accept} = $tp; |
356 |
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}, |
357 |
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; |
358 |
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} |
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root |
1.14 |
for (@others) { |
361 |
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my $node = add_node $_; |
362 |
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$node->{autoconnect} = 1; |
363 |
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$node->connect; |
364 |
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} |
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1.1 |
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366 |
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if ($SLAVE) { |
367 |
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my $timeout = AE::timer $MONITOR_TIMEOUT, 0, sub { $SLAVE->() }; |
368 |
root |
1.13 |
my $master = $SLAVE->recv; |
369 |
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$master |
370 |
root |
1.1 |
or Carp::croak "AnyEvent::MP: unable to enter slave mode, unable to connect to a seednode.\n"; |
371 |
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372 |
root |
1.13 |
$MASTER = $master->{noderef}; |
373 |
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$master->{autoconnect} = 1; |
374 |
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375 |
root |
1.1 |
(my $via = $MASTER) =~ s/,/!/g; |
376 |
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377 |
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$NODE .= "\@$via"; |
378 |
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$NODE{$NODE} = $NODE{""}; |
379 |
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380 |
root |
1.2 |
$_->send (["", iam => $NODE]) |
381 |
root |
1.1 |
for values %NODE; |
382 |
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383 |
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$SLAVE = 1; |
384 |
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} |
385 |
root |
1.6 |
|
386 |
root |
1.13 |
for (@{ $profile->{services} }) { |
387 |
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if (s/::$//) { |
388 |
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eval "require $_"; |
389 |
|
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die $@ if $@; |
390 |
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} else { |
391 |
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(load_func $_)->(); |
392 |
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} |
393 |
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} |
394 |
root |
1.1 |
} |
395 |
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396 |
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############################################################################# |
397 |
root |
1.6 |
# node monitoring and info |
398 |
root |
1.3 |
|
399 |
|
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sub _uniq_nodes { |
400 |
|
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my %node; |
401 |
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402 |
|
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@node{values %NODE} = values %NODE; |
403 |
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404 |
|
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values %node; |
405 |
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} |
406 |
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407 |
root |
1.13 |
=item node_is_known $noderef |
408 |
|
|
|
409 |
|
|
Returns true iff the given node is currently known to the system. |
410 |
|
|
|
411 |
|
|
=cut |
412 |
|
|
|
413 |
|
|
sub node_is_known($) { |
414 |
|
|
exists $NODE{$_[0]} |
415 |
|
|
} |
416 |
|
|
|
417 |
|
|
=item node_is_up $noderef |
418 |
|
|
|
419 |
|
|
Returns true if the given node is "up", that is, the kernel thinks it has |
420 |
|
|
a working connection to it. |
421 |
|
|
|
422 |
|
|
If the node is known but not currently connected, returns C<0>. If the |
423 |
|
|
node is not known, returns C<undef>. |
424 |
|
|
|
425 |
|
|
=cut |
426 |
|
|
|
427 |
|
|
sub node_is_up($) { |
428 |
|
|
($NODE{$_[0]} or return)->{transport} |
429 |
|
|
? 1 : 0 |
430 |
|
|
} |
431 |
|
|
|
432 |
root |
1.3 |
=item known_nodes |
433 |
|
|
|
434 |
|
|
Returns the noderefs of all nodes connected to this node. |
435 |
|
|
|
436 |
|
|
=cut |
437 |
|
|
|
438 |
|
|
sub known_nodes { |
439 |
|
|
map $_->{noderef}, _uniq_nodes |
440 |
|
|
} |
441 |
|
|
|
442 |
|
|
=item up_nodes |
443 |
|
|
|
444 |
|
|
Return the noderefs of all nodes that are currently connected (excluding |
445 |
|
|
the node itself). |
446 |
|
|
|
447 |
|
|
=cut |
448 |
|
|
|
449 |
|
|
sub up_nodes { |
450 |
|
|
map $_->{noderef}, grep $_->{transport}, _uniq_nodes |
451 |
|
|
} |
452 |
|
|
|
453 |
|
|
=item $guard = mon_nodes $callback->($noderef, $is_up, @reason) |
454 |
|
|
|
455 |
|
|
Registers a callback that is called each time a node goes up (connection |
456 |
|
|
is established) or down (connection is lost). |
457 |
|
|
|
458 |
|
|
Node up messages can only be followed by node down messages for the same |
459 |
|
|
node, and vice versa. |
460 |
|
|
|
461 |
root |
1.13 |
The function returns an optional guard which can be used to de-register |
462 |
root |
1.3 |
the monitoring callback again. |
463 |
|
|
|
464 |
|
|
=cut |
465 |
|
|
|
466 |
|
|
our %MON_NODES; |
467 |
|
|
|
468 |
|
|
sub mon_nodes($) { |
469 |
|
|
my ($cb) = @_; |
470 |
|
|
|
471 |
|
|
$MON_NODES{$cb+0} = $cb; |
472 |
|
|
|
473 |
|
|
wantarray && AnyEvent::Util::guard { delete $MON_NODES{$cb+0} } |
474 |
|
|
} |
475 |
|
|
|
476 |
|
|
sub _inject_nodeevent($$;@) { |
477 |
root |
1.16 |
my ($node, $up, @reason) = @_; |
478 |
root |
1.3 |
|
479 |
|
|
for my $cb (values %MON_NODES) { |
480 |
root |
1.16 |
eval { $cb->($node->{noderef}, $up, @reason); 1 } |
481 |
|
|
or $WARN->(1, $@); |
482 |
root |
1.3 |
} |
483 |
root |
1.16 |
|
484 |
|
|
$WARN->(7, "$node->{noderef} is " . ($up ? "up" : "down") . " (@reason)"); |
485 |
root |
1.3 |
} |
486 |
|
|
|
487 |
|
|
############################################################################# |
488 |
root |
1.1 |
# self node code |
489 |
|
|
|
490 |
|
|
our %node_req = ( |
491 |
|
|
# internal services |
492 |
|
|
|
493 |
|
|
# monitoring |
494 |
|
|
mon0 => sub { # disable monitoring |
495 |
|
|
my $portid = shift; |
496 |
|
|
my $node = $SRCNODE; |
497 |
|
|
$NODE{""}->unmonitor ($portid, delete $node->{rmon}{$portid}); |
498 |
|
|
}, |
499 |
|
|
mon1 => sub { # enable monitoring |
500 |
|
|
my $portid = shift; |
501 |
|
|
my $node = $SRCNODE; |
502 |
|
|
$NODE{""}->monitor ($portid, $node->{rmon}{$portid} = sub { |
503 |
|
|
$node->send (["", kil => $portid, @_]); |
504 |
|
|
}); |
505 |
|
|
}, |
506 |
|
|
kil => sub { |
507 |
|
|
my $cbs = delete $SRCNODE->{lmon}{+shift} |
508 |
|
|
or return; |
509 |
|
|
|
510 |
|
|
$_->(@_) for @$cbs; |
511 |
|
|
}, |
512 |
|
|
# node changed its name (for slave nodes) |
513 |
|
|
iam => sub { |
514 |
root |
1.8 |
# get rid of bogus slave/xxx name, hopefully |
515 |
|
|
delete $NODE{$SRCNODE->{noderef}}; |
516 |
|
|
|
517 |
|
|
# change noderef |
518 |
root |
1.1 |
$SRCNODE->{noderef} = $_[0]; |
519 |
root |
1.8 |
|
520 |
|
|
# anchor |
521 |
root |
1.1 |
$NODE{$_[0]} = $SRCNODE; |
522 |
|
|
}, |
523 |
|
|
|
524 |
|
|
# public services |
525 |
|
|
|
526 |
|
|
# relay message to another node / generic echo |
527 |
root |
1.15 |
snd => \&snd, |
528 |
|
|
snd_multi => sub { |
529 |
root |
1.1 |
snd @$_ for @_ |
530 |
|
|
}, |
531 |
|
|
|
532 |
root |
1.4 |
# informational |
533 |
|
|
info => sub { |
534 |
|
|
snd @_, $NODE; |
535 |
|
|
}, |
536 |
|
|
known_nodes => sub { |
537 |
|
|
snd @_, known_nodes; |
538 |
|
|
}, |
539 |
|
|
up_nodes => sub { |
540 |
|
|
snd @_, up_nodes; |
541 |
|
|
}, |
542 |
|
|
|
543 |
root |
1.1 |
# random garbage |
544 |
|
|
eval => sub { |
545 |
|
|
my @res = eval shift; |
546 |
|
|
snd @_, "$@", @res if @_; |
547 |
|
|
}, |
548 |
|
|
time => sub { |
549 |
|
|
snd @_, AE::time; |
550 |
|
|
}, |
551 |
|
|
devnull => sub { |
552 |
|
|
# |
553 |
|
|
}, |
554 |
root |
1.15 |
"" => sub { |
555 |
|
|
# empty messages are sent by monitoring |
556 |
|
|
}, |
557 |
root |
1.1 |
); |
558 |
|
|
|
559 |
|
|
$NODE{""} = $NODE{$NODE} = new AnyEvent::MP::Node::Self noderef => $NODE; |
560 |
|
|
$PORT{""} = sub { |
561 |
|
|
my $tag = shift; |
562 |
|
|
eval { &{ $node_req{$tag} ||= load_func $tag } }; |
563 |
root |
1.16 |
$WARN->(2, "error processing node message: $@") if $@; |
564 |
root |
1.1 |
}; |
565 |
|
|
|
566 |
|
|
=back |
567 |
|
|
|
568 |
|
|
=head1 SEE ALSO |
569 |
|
|
|
570 |
|
|
L<AnyEvent::MP>. |
571 |
|
|
|
572 |
|
|
=head1 AUTHOR |
573 |
|
|
|
574 |
|
|
Marc Lehmann <schmorp@schmorp.de> |
575 |
|
|
http://home.schmorp.de/ |
576 |
|
|
|
577 |
|
|
=cut |
578 |
|
|
|
579 |
|
|
1 |
580 |
|
|
|