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|
#!/usr/bin/perl -w
use strict;
use vars qw( $DEBUG $kids $max_kids %kids );
use POSIX qw(:sys_wait_h);
use IO::File;
use FS::UID qw(adminsuidsetup forksuidsetup driver_name dbh myconnect);
use FS::Daemon qw(daemonize1 drop_root logfile daemonize2 sigint sigterm);
use FS::Record qw(qsearch qsearchs);
use FS::queue;
use FS::queue_depend;
# no autoloading for non-FS classes...
use Net::SSH 0.07;
$DEBUG = 0;
$max_kids = '10'; #guess it should be a config file...
$kids = 0;
my $user = shift or die &usage;
warn "starting daemonization (forking)\n" if $DEBUG;
#daemonize1('freeside-queued',$user); #to keep pid files unique w/multi installs
daemonize1('freeside-queued');
warn "dropping privledges\n" if $DEBUG;
drop_root();
$ENV{HOME} = (getpwuid($>))[7]; #for ssh
warn "connecting to database\n" if $DEBUG;
$@ = 'not connected';
while ( $@ ) {
eval { adminsuidsetup $user; };
if ( $@ ) {
warn $@;
warn "sleeping for reconnect...\n";
sleep 5;
}
}
logfile( "%%%FREESIDE_LOG%%%/queuelog.". $FS::UID::datasrc );
warn "completing daemonization (detaching))\n" if $DEBUG;
daemonize2();
#--
my $warnkids=0;
while (1) {
&reap_kids;
#prevent runaway forking
if ( $kids >= $max_kids ) {
warn "WARNING: maximum $kids children reached\n" unless $warnkids++;
&reap_kids;
sleep 1; #waiting for signals is cheap
next;
}
$warnkids=0;
unless ( dbh && dbh->ping ) {
warn "WARNING: connection to database lost, reconnecting...\n";
eval { $FS::UID::dbh = myconnect; };
unless ( !$@ && dbh && dbh->ping ) {
warn "WARNING: still no connection to database, sleeping for retry...\n";
sleep 10;
next;
} else {
warn "WARNING: reconnected to database\n";
}
}
#my($job, $ljob);
#{
# my $oldAutoCommit = $FS::UID::AutoCommit;
# local $FS::UID::AutoCommit = 0;
$FS::UID::AutoCommit = 0;
#assuming mysql 4.1 w/subqueries now
#my $nodepend = driver_name eq 'mysql'
# ? ''
# : 'AND 0 = ( SELECT COUNT(*) FROM queue_depend'.
# ' WHERE queue_depend.jobnum = queue.jobnum ) ';
my $nodepend = 'AND 0 = ( SELECT COUNT(*) FROM queue_depend'.
' WHERE queue_depend.jobnum = queue.jobnum ) ';
my $job = qsearchs(
'queue',
{ 'status' => 'new' },
'',
driver_name eq 'mysql'
? "$nodepend ORDER BY jobnum LIMIT 1 FOR UPDATE"
: "$nodepend ORDER BY jobnum FOR UPDATE LIMIT 1"
) or do {
# if $oldAutoCommit {
dbh->commit or do {
warn "WARNING: database error, closing connection: ". dbh->errstr;
undef $FS::UID::dbh;
next;
};
# }
sleep 5; #connecting to db is expensive
next;
};
#assuming mysql 4.1 w/subqueries now
#if ( driver_name eq 'mysql'
# && qsearch('queue_depend', { 'jobnum' => $job->jobnum } ) ) {
# dbh->commit or die dbh->errstr; #if $oldAutoCommit;
# sleep 5; #would be better if mysql could do everything in query above
# next;
#}
my %hash = $job->hash;
$hash{'status'} = 'locked';
my $ljob = new FS::queue ( \%hash );
my $error = $ljob->replace($job);
if ( $error ) {
warn "WARNING: database error locking job, closing connection: ".
dbh->errstr;
undef $FS::UID::dbh;
next;
}
# if $oldAutoCommit {
dbh->commit or do {
warn "WARNING: database error, closing connection: ". dbh->errstr;
undef $FS::UID::dbh;
next;
};
# }
$FS::UID::AutoCommit = 1;
#}
my @args = $ljob->args;
splice @args, 0, 1, $ljob if $args[0] eq '_JOB';
defined( my $pid = fork ) or do {
warn "WARNING: can't fork: $!\n";
my %hash = $job->hash;
$hash{'status'} = 'failed';
$hash{'statustext'} = "[freeside-queued] can't fork: $!";
my $ljob = new FS::queue ( \%hash );
my $error = $ljob->replace($job);
die $error if $error;
next; #don't increment the kid counter
};
if ( $pid ) {
$kids++;
$kids{$pid} = 1;
} else { #kid time
#get new db handle
$FS::UID::dbh->{InactiveDestroy} = 1;
forksuidsetup($user);
#auto-use classes...
#if ( $ljob->job =~ /(FS::part_export::\w+)::/ ) {
if ( $ljob->job =~ /(FS::part_export::\w+)::/
|| $ljob->job =~ /(FS::\w+)::/
)
{
my $class = $1;
eval "use $class;";
if ( $@ ) {
warn "job use $class failed";
my %hash = $ljob->hash;
$hash{'status'} = 'failed';
$hash{'statustext'} = $@;
my $fjob = new FS::queue( \%hash );
my $error = $fjob->replace($ljob);
die $error if $error;
exit; #end-of-kid
};
}
my $eval = "&". $ljob->job. '(@args);';
warn 'running "&'. $ljob->job. '('. join(', ', @args). ")\n" if $DEBUG;
eval $eval; #throw away return value? suppose so
if ( $@ ) {
warn "job $eval failed";
my %hash = $ljob->hash;
$hash{'status'} = 'failed';
$hash{'statustext'} = $@;
my $fjob = new FS::queue( \%hash );
my $error = $fjob->replace($ljob);
die $error if $error;
} else {
$ljob->delete;
}
exit;
#end-of-kid
}
} continue {
if ( sigterm() ) {
warn "received TERM signal; exiting\n";
exit;
}
if ( sigint() ) {
warn "received INT signal; exiting\n";
exit;
}
}
sub usage {
die "Usage:\n\n freeside-queued user\n";
}
sub reap_kids {
foreach my $pid ( keys %kids ) {
my $kid = waitpid($pid, WNOHANG);
if ( $kid > 0 ) {
$kids--;
delete $kids{$kid};
}
}
}
=head1 NAME
freeside-queued - Job queue daemon
=head1 SYNOPSIS
freeside-queued user
=head1 DESCRIPTION
Job queue daemon. Should be running at all times.
user: from the mapsecrets file - see config.html from the base documentation
=head1 VERSION
=head1 BUGS
=head1 SEE ALSO
=cut
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