lib/PublicInbox/SearchIdxPart.pm

   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::SearchIdxPart;
   4 use strict;
   5 use warnings;
   6 use base qw(PublicInbox::SearchIdx);
   7
   8 sub new {
   9         my ($class, $v2writable, $part, $threader) = @_;
  10         my $self = $class->SUPER::new($v2writable->{-inbox}, 1, $part);
  11         $self->{threader} = $threader;
  12         my ($r, $w);
  13         pipe($r, $w) or die "pipe failed: $!\n";
  14         my $pid = fork;
  15         defined $pid or die "fork failed: $!\n";
  16         if ($pid == 0) {
  17                 foreach my $other (@{$v2writable->{idx_parts}}) {
  18                         my $other_w = $other->{w} or next;
  19                         close $other_w or die "close other failed: $!\n";
  20                 }
  21                 $v2writable = undef;
  22                 close $w;
  23                 eval { partition_worker_loop($self, $r) };
  24                 die "worker $part died: $@\n" if $@;
  25                 die "unexpected MM $self->{mm}" if $self->{mm};
  26                 exit;
  27         }
  28         $self->{pid} = $pid;
  29         $self->{w} = $w;
  30         close $r;
  31         $self;
  32 }
  33
  34 sub partition_worker_loop ($$) {
  35         my ($self, $r) = @_;
  36         my $xdb = $self->_xdb_acquire;
  37         $xdb->begin_transaction;
  38         my $txn = 1;
  39         while (my $line = $r->getline) {
  40                 if ($line eq "commit\n") {
  41                         $xdb->commit_transaction if $txn;
  42                         $txn = undef;
  43                 } elsif ($line eq "close\n") {
  44                         $self->_xdb_release;
  45                         $xdb = $txn = undef;
  46                 } else {
  47                         my ($len, $artnum, $object_id) = split(/ /, $line);
  48                         $xdb ||= $self->_xdb_acquire;
  49                         if (!$txn) {
  50                                 $xdb->begin_transaction;
  51                                 $txn = 1;
  52                         }
  53                         my $n = read($r, my $msg, $len) or die "read: $!\n";
  54                         $n == $len or die "short read: $n != $len\n";
  55                         my $mime = PublicInbox::MIME->new(\$msg);
  56                         $self->index_blob($mime, $len, $artnum, $object_id);
  57                 }
  58         }
  59         warn "$$ still in transaction\n" if $txn;
  60         warn "$$ xdb active\n" if $xdb;
  61 }
  62
  63 # called by V2Writable
  64 sub index_raw {
  65         my ($self, $len, $msgref, $artnum, $object_id) = @_;
  66         print { $self->{w} } "$len $artnum $object_id\n", $$msgref or die
  67                 "failed to write partition $!\n";
  68 }
  69
  70 1;