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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# This Source Code Form is "Incompatible With Secondary Licenses", as
# defined by the Mozilla Public License, v. 2.0.
# XXX In order to support Windows, we have to make gd_redirect_output
# use Log4Perl or something instead of calling "logger". We probably
# also need to use Win32::Daemon or something like that to daemonize.
package Bugzilla::JobQueue::Runner;
use 5.10.1;
use strict;
use warnings;
use Cwd qw(abs_path);
use File::Basename;
use File::Copy;
use Pod::Usage;
use Bugzilla::Constants;
use Bugzilla::JobQueue;
use Bugzilla::Util qw(get_text);
BEGIN { eval "use parent qw(Daemon::Generic)"; }
our $VERSION = BUGZILLA_VERSION;
# Info we need to install/uninstall the daemon.
our $chkconfig = "/sbin/chkconfig";
our $initd = "/etc/init.d";
our $initscript = "bugzilla-queue";
# The Daemon::Generic docs say that it uses all sorts of
# things from gd_preconfig, but in fact it does not. The
# only thing it uses from gd_preconfig is the "pidfile"
# config parameter.
sub gd_preconfig {
my $self = shift;
$self->{_run_command} = 'subprocess_worker';
my $pidfile = $self->{gd_args}{pidfile};
if (!$pidfile) {
$pidfile = bz_locations()->{datadir} . '/' . $self->{gd_progname}
. ".pid";
}
return (pidfile => $pidfile);
}
# All config other than the pidfile has to be done in gd_getopt
# in order for it to be set up early enough.
sub gd_getopt {
my $self = shift;
$self->SUPER::gd_getopt();
if ($self->{gd_args}{progname}) {
$self->{gd_progname} = $self->{gd_args}{progname};
}
else {
$self->{gd_progname} = basename($0);
}
# There are places that Daemon Generic's new() uses $0 instead of
# gd_progname, which it really shouldn't, but this hack fixes it.
$self->{_original_zero} = $0;
$0 = $self->{gd_progname};
}
sub gd_postconfig {
my $self = shift;
# See the hack above in gd_getopt. This just reverses it
# in case anything else needs the accurate $0.
$0 = delete $self->{_original_zero};
}
sub gd_more_opt {
my $self = shift;
return (
'pidfile=s' => \$self->{gd_args}{pidfile},
'n=s' => \$self->{gd_args}{progname},
'j=s@' => \$self->{gd_args}{job_name},
);
}
sub gd_usage {
pod2usage({ -verbose => 0, -exitval => 'NOEXIT' });
return 0
}
sub gd_can_install {
my $self = shift;
my $source_file;
if ( -e "/etc/SuSE-release" ) {
$source_file = "contrib/$initscript.suse";
} else {
$source_file = "contrib/$initscript.rhel";
}
my $dest_file = "$initd/$initscript";
my $sysconfig = '/etc/sysconfig';
my $config_file = "$sysconfig/$initscript";
if (!-x $chkconfig or !-d $initd) {
return $self->SUPER::gd_can_install(@_);
}
return sub {
if (!-w $initd) {
print "You must run the 'install' command as root.\n";
return;
}
if (-e $dest_file) {
print "$initscript already in $initd.\n";
}
else {
copy($source_file, $dest_file)
or die "Could not copy $source_file to $dest_file: $!";
chmod(0755, $dest_file)
or die "Could not change permissions on $dest_file: $!";
}
system($chkconfig, '--add', $initscript);
print "$initscript installed.",
" To start the daemon, do \"$dest_file start\" as root.\n";
if (-d $sysconfig and -w $sysconfig) {
if (-e $config_file) {
print "$config_file already exists.\n";
return;
}
open(my $config_fh, ">", $config_file)
or die "Could not write to $config_file: $!";
my $directory = abs_path(dirname($self->{_original_zero}));
my $owner_id = (stat $self->{_original_zero})[4];
my $owner = getpwuid($owner_id);
print $config_fh <<END;
#!/bin/sh
BUGZILLA="$directory"
# This user must have write access to Bugzilla's data/ directory.
USER=$owner
END
close($config_fh);
}
else {
print "Please edit $dest_file to configure the daemon.\n";
}
}
}
sub gd_can_uninstall {
my $self = shift;
if (-x $chkconfig and -d $initd) {
return sub {
if (!-e "$initd/$initscript") {
print "$initscript not installed.\n";
return;
}
system($chkconfig, '--del', $initscript);
print "$initscript disabled.",
" To stop it, run: $initd/$initscript stop\n";
}
}
return $self->SUPER::gd_can_install(@_);
}
sub gd_check {
my $self = shift;
# Get a count of all the jobs currently in the queue.
my $jq = Bugzilla->job_queue();
my @dbs = $jq->bz_databases();
my $count = 0;
foreach my $driver (@dbs) {
$count += $driver->select_one('SELECT COUNT(*) FROM ts_job', []);
}
print get_text('job_queue_depth', { count => $count }) . "\n";
}
sub gd_setup_signals {
my $self = shift;
$self->SUPER::gd_setup_signals();
$SIG{TERM} = sub { $self->gd_quit_event(); }
}
sub gd_quit_event {
Bugzilla->job_queue->kill_worker();
exit(1);
}
sub gd_other_cmd {
my ($self, $do, $locked) = @_;
if ($do eq "once") {
$self->{_run_command} = 'work_once';
} elsif ($do eq "onepass") {
$self->{_run_command} = 'work_until_done';
} else {
$self->SUPER::gd_other_cmd($do, $locked);
}
}
sub gd_run {
my $self = shift;
$self->_do_work($self->{_run_command});
}
sub _do_work {
my ($self, $fn) = @_;
my @job_name = @{ $self->{gd_args}{job_name} // [] };
my $jq = Bugzilla->job_queue();
$jq->set_verbose($self->{debug});
$jq->set_pidfile($self->{gd_pidfile});
while (my ($key, $module) = each %{ Bugzilla::JobQueue->job_map() }) {
next if @job_name and ! grep { $_ eq $key } @job_name;
eval "use $module";
$jq->can_do($module);
}
$jq->$fn;
}
1;
__END__
=head1 NAME
Bugzilla::JobQueue::Runner - A class representing the daemon that runs the
job queue.
=head1 SYNOPSIS
use Bugzilla::JobQueue::Runner;
Bugzilla::JobQueue::Runner->new();
=head1 DESCRIPTION
This is a subclass of L<Daemon::Generic> that is used by L<jobqueue>
to run the Bugzilla job queue.
=head1 B<Methods in need of POD>
=over
=item gd_check
=item gd_run
=item gd_can_install
=item gd_quit_event
=item gd_other_cmd
=item gd_more_opt
=item gd_postconfig
=item gd_usage
=item gd_getopt
=item gd_preconfig
=item gd_can_uninstall
=item gd_setup_signals
=back
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