1 # Copyright (C) 2018 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
3 package PublicInbox::SearchIdxSkeleton;
6 use base qw(PublicInbox::SearchIdx);
7 use Storable qw(freeze thaw);
10 my ($class, $v2writable) = @_;
11 my $self = $class->SUPER::new($v2writable->{-inbox}, 1, 'skel');
17 pipe($r, $w) or die "pipe failed: $!\n";
18 my ($barrier_wait, $barrier_note);
19 pipe($barrier_wait, $barrier_note) or die "pipe failed: $!\n";
20 binmode $_, ':raw' foreach ($r, $w, $barrier_wait, $barrier_note);
22 defined $pid or die "fork failed: $!\n";
24 $v2writable->atfork_child;
28 eval { skeleton_worker_loop($self, $r, $barrier_note) };
29 die "skeleton worker died: $@\n" if $@;
36 $self->{barrier_wait} = $barrier_wait;
40 # lock on only exists in parent, not in worker
41 my $l = $self->{lock_path} = $self->xdir . '/pi-v2-skeleton.lock';
42 open my $fh, '>>', $l or die "failed to create $l: $!\n";
46 sub skeleton_worker_loop {
47 my ($self, $r, $barrier_note) = @_;
48 $barrier_note->autoflush(1);
49 $0 = 'pi-v2-skeleton';
50 my $xdb = $self->_xdb_acquire;
51 $xdb->begin_transaction;
54 while (my $line = $r->getline) {
55 if ($line eq "commit\n") {
56 $xdb->commit_transaction if $txn;
58 } elsif ($line eq "close\n") {
61 } elsif ($line =~ /\Abarrier_init (\d+)\n\z/) {
63 die "barrier in-progress\n" if defined $barrier;
64 $barrier = { map { $_ => 1 } (0..$n) };
65 } elsif ($line =~ /\Abarrier (\d+)\n\z/) {
67 die "no barrier in-progress\n" unless defined $barrier;
68 delete $barrier->{$1} or die "unknown barrier: $part\n";
69 if ((scalar keys %$barrier) == 0) {
71 $xdb->commit_transaction if $txn;
73 print $barrier_note "barrier_done\n" or die
74 "print failed to barrier note: $!";
78 my $n = read($r, my $msg, $len) or die "read: $!\n";
79 $n == $len or die "short read: $n != $len\n";
80 $msg = thaw($msg); # should raise on error
81 defined $msg or die "failed to thaw buffer\n";
82 $xdb ||= $self->_xdb_acquire;
84 $xdb->begin_transaction;
87 eval { index_skeleton_real($self, $msg) };
88 warn "failed to index message <$msg->[-1]>: $@\n" if $@;
91 die "xdb not released\n" if $xdb;
92 die "in transaction\n" if $txn;
95 # called by a partition worker
97 my ($self, $values) = @_;
100 my $str = freeze($values);
101 $str = length($str) . "\n" . $str;
103 # multiple processes write to the same pipe, so use flock
104 # We can't avoid this lock for <=PIPE_BUF writes, either,
105 # because those atomic writes can break up >PIPE_BUF ones
106 $self->_lock_acquire;
107 print $w $str or $err = $!;
108 $self->_lock_release;
110 die "print failed: $err\n" if $err;
113 # values: [ TS, NUM, BYTES, LINES, MID, XPATH, doc_data ]
114 sub index_skeleton_real ($$) {
115 my ($self, $values) = @_;
116 my $doc_data = pop @$values;
117 my $xpath = pop @$values;
118 my $mids = pop @$values;
119 my $ts = $values->[PublicInbox::Search::TS];
120 my $smsg = PublicInbox::SearchMsg->new(undef);
121 my $doc = $smsg->{doc};
122 PublicInbox::SearchIdx::add_values($doc, $values);
123 $doc->set_data($doc_data);
125 $smsg->load_from_data($doc_data);
126 my $num = $values->[PublicInbox::Search::NUM];
127 my @refs = ($smsg->references =~ /<([^>]+)>/g);
128 $self->link_and_save($doc, $mids, \@refs, $num, $xpath);
131 # write to the subprocess
133 my ($self, $nparts) = @_;
135 print $w "barrier_init $nparts\n" or die "failed to write: $!";
136 $w->flush or die "failed to flush: $!";
141 my $l = $self->{barrier_wait}->getline;
142 $l eq "barrier_done\n" or die "bad response from barrier_wait: $l\n";