1 # Copyright (C) all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # internal command for dealing with inotify, kqueue vnodes, etc
5 # it is a semi-persistent worker
6 package PublicInbox::LeiNoteEvent;
9 use parent qw(PublicInbox::IPC);
12 our $to_flush; # { cfgpath => $lei }
16 my $lne = delete $lei->{cfg}->{-lei_note_event};
17 $lne->wq_close(1, undef, $lei) if $lne; # runs _lei_wq_eof;
20 # we batch up writes and flush every 5s (matching Linux default
21 # writeback behavior) since MUAs can trigger a storm of inotify events
22 sub flush_task { # PublicInbox::DS timer callback
23 my $todo = $to_flush // return;
25 for my $lei (values %$todo) { flush_lei($lei) }
28 # sets a timer to flush
29 sub note_event_arm_done ($) {
31 PublicInbox::DS::add_uniq_timer('flush_timer', 5, \&flush_task);
32 $to_flush->{$lei->{cfg}->{'-f'}} //= $lei;
35 sub eml_event ($$$$) {
36 my ($self, $eml, $vmd, $state) = @_;
37 my $sto = $self->{lei}->{sto};
38 if ($state =~ /\Aimport-(?:rw|ro)\z/) {
39 $sto->wq_do('set_eml', $eml, $vmd);
40 } elsif ($state =~ /\Aindex-(?:rw|ro)\z/) {
41 my $xoids = $self->{lei}->ale->xoids_for($eml);
42 $sto->wq_do('index_eml_only', $eml, $vmd, $xoids);
43 } elsif ($state =~ /\Atag-(?:rw|ro)\z/) {
45 my $c = $self->{lse}->kw_changed($eml, $vmd->{kw}, $docids);
46 if (scalar @$docids) { # already in lei/store
47 $sto->wq_do('set_eml_vmd', undef, $vmd, $docids) if $c;
48 } elsif (my $xoids = $self->{lei}->ale->xoids_for($eml)) {
49 # it's in an external, only set kw, here
50 $sto->wq_do('set_xvmd', $xoids, $eml, $vmd);
51 } # else { totally unknown: ignore
53 warn "unknown state: $state (in $self->{lei}->{cfg}->{'-f'})\n";
57 sub maildir_event { # via wq_io_do
58 my ($self, $fn, $vmd, $state) = @_;
59 my $eml = PublicInbox::InboxWritable::eml_from_path($fn) // return;
60 eml_event($self, $eml, $vmd, $state);
64 my ($lei, $folder, $new_cur, $bn, $fn, @rest) = @_;
65 die "BUG: unexpected: @rest" if @rest;
66 my $cfg = $lei->_lei_cfg or return; # gone (race)
67 my $sto = $lei->_lei_store or return; # gone
68 return flush_lei($lei) if $folder eq 'done'; # special case
69 my $lms = $lei->lms or return;
70 $lms->lms_write_prepare if $new_cur eq ''; # for ->clear_src below
71 my $err = $lms->arg2folder($lei, [ $folder ]);
72 return if $err->{fail};
73 my $state = $cfg->get_1("watch.$folder", 'state') // 'tag-rw';
74 return if $state eq 'pause';
75 return $lms->clear_src($folder, \$bn) if $new_cur eq '';
78 $sto->write_prepare($lei);
79 require PublicInbox::MdirReader;
80 my $self = $cfg->{-lei_note_event} //= do {
81 my $wq = bless { lms => $lms }, __PACKAGE__;
82 # MUAs such as mutt can trigger massive rename() storms so
83 # use some CPU, but don't overwhelm slower storage, either
84 my $jobs = $wq->detect_nproc // 1;
85 $jobs = 4 if $jobs > 4; # same default as V2Writable
86 my ($op_c, $ops) = $lei->workers_start($wq, $jobs);
87 $lei->wait_wq_events($op_c, $ops);
88 note_event_arm_done($lei);
91 if ($folder =~ /\Amaildir:/i) {
92 my $fl = PublicInbox::MdirReader::maildir_basename_flags($bn)
94 return if index($fl, 'T') >= 0;
95 my $kw = PublicInbox::MdirReader::flags2kw($fl);
96 my $vmd = { kw => $kw, sync_info => [ $folder, \$bn ] };
97 $self->wq_io_do('maildir_event', [], $fn, $vmd, $state);
101 sub ipc_atfork_child {
103 $self->{lei}->_lei_atfork_child(1); # persistent, for a while
104 $self->{lms}->lms_write_prepare;
105 $self->{lse} = $self->{lei}->{sto}->search;
106 $self->SUPER::ipc_atfork_child;
110 my ($arg, $pid) = @_;
111 my ($self, $lei) = @$arg;
112 $lei->can('wq_done_wait')->($arg, $pid);
115 sub _lei_wq_eof { # EOF callback for main lei daemon
117 my $lne = delete $lei->{lne} or return $lei->fail;
118 $lei->sto_done_request;
119 $lne->wq_wait_old(\&lne_done_wait, $lei);