-use IO::File;
-
-use POSIX;
-
-my $log_file;
-
-sub log($) {
- $log_file //= new IO::File '>>log' or die "Cannot open log: $!";
- print $log_file POSIX::strftime("%Y-%m-%d %H:%M:%S ", localtime), $_[0], "\n";
-}
-
-package BEX::Job;
-
-use POSIX;
-
-our $job_cnt = 0;
-
-sub new($;$) {
- my ($class, $id) = @_;
- my $job = { };
- bless $job;
- if (defined $id) {
- $job->{'ID'} = $id;
- } else {
- $job_cnt++;
- $job->{'ID'} = POSIX::strftime("%Y%m%d-%H%M%S-$$-$job_cnt", localtime);
- }
- $job->{'Subject'} = '(no subject)';
- return $job;
-}
-
-sub new_from_file($$;$) {
- my ($class, $file, $header_only) = @_;
- my $job = { };
- open T, '<', $file or die "Cannot open $file: $!";
- while (<T>) {
- chomp;
- /^$/ and last;
- /^([A-Z][A-Za-z0-9-]*):\s*(.*)/ or die "Cannot load $file: Header syntax error";
- !defined $job->{$1} or die "Cannot load $file: Header $1 re-defined";
- $job->{$1} = $2;
- }
- if (!$header_only) {
- my @cmds = <T>;
- $job->{'body'} = join("", @cmds);
- }
- close T;
- $job->{'Subject'} //= '?';
- $job->{'ID'} or die "Cannot load $file: Missing ID";
- return bless $job;
-}
-
-sub attr($$;$) {
- my ($job, $attr, $val) = @_;
- $job->{$attr} = $val if defined $val;
- return $job->{$attr};
-}
-
-sub dump($) {
- my ($job) = @_;
- for my $k (sort keys %$job) {
- print "$k: ", $job->{$k}, "\n";
- }
-}
-
-sub save($;$) {
- my ($job, $fn) = @_;
- -d "tmp" or mkdir "tmp" or die "Cannot create directory tmp: $!";
- $fn //= 'tmp/' . $job->{'ID'};
- open T, '>', $fn or die "Cannot create $fn: $!";
- for my $k (sort grep { /^[A-Z]/ } keys %$job) {
- print T "$k: ", $job->{$k}, "\n";
- }
- print T "\n";
- print T $job->{'body'} if defined $job->{'body'};
- close T;
- return $fn;
-}
-
-package BEX::Queue;
-
-sub new($;$) {
- my ($class, $name) = @_;
- $name //= 'queue';
- -d $name or die "Queue directory $name does not exist\n";
- for my $d ("hosts", "jobs") {
- -d "$name/$d" or mkdir "$name/$d" or die "Cannot create directory $name/$d: $!";
- }
- my $queue = {
- 'Name' => $name,
- 'MetaCache' => {},
- };
- return bless $queue;
-}
-
-sub host_dir($$) {
- my ($queue, $machine) = @_;
- return $queue->{'Name'} . '/hosts/' . $machine;
-}
-
-sub queue_file($$) {
- my ($queue, $machine, $jid) = @_;
- return $queue->host_dir($machine) . '/' . $jid . '.job';
-}
-
-sub status_file($$) {
- my ($queue, $machine, $jid) = @_;
- return $queue->host_dir($machine) . '/' . $jid . '.stat';
-}
-
-sub temp_file($$) {
- my ($queue, $machine, $jid) = @_;
- return $queue->host_dir($machine) . '/' . $jid . '.tmp';
-}
-
-sub job_file($$) {
- my ($queue, $jid) = @_;
- return $queue->{'Name'} . '/jobs/' . $jid. '.job';
-}
-
-sub enqueue($$$) {
- my ($queue, $machine, $job) = @_;
- my $qf = $queue->queue_file($machine, $job->{'ID'});
- if (-f $qf) { return 0; }
- my $fn = $queue->job_file($job->{'ID'});
- -f $fn or $job->save($fn);
- my $dir = $queue->host_dir($machine);
- -d $dir or mkdir $dir or die "Cannot create directory $dir: $!";
- symlink '../../jobs/' . $job->{'ID'} . '.job', $qf or die "Cannot create $qf: $!";
- return 1;
-}
-
-sub scan($$) {
- my ($queue, $machine) = @_;
- my @list = ();
- if (opendir D, $queue->host_dir($machine)) {
- while ($_ = readdir D) {
- /^\./ and next;
- s{\.job}{} or next;
- push @list, $_;
- }
- closedir D;
- }
- return @list;
-}
-
-sub remove($$) {
- my ($queue, $machine, $jid) = @_;
- unlink $queue->queue_file($machine, $jid);
- unlink $queue->status_file($machine, $jid);
- unlink $queue->temp_file($machine, $jid);
-}
-
-sub job_metadata($$) {
- my ($queue, $jid) = @_;
- my $cache = $queue->{'MetaCache'};
- if (!defined $cache->{$jid}) {
- $cache->{$jid} = BEX::Job->new_from_file($queue->job_file($jid), 1);
- }
- return $cache->{$jid};
-}
-
-sub read_job_status($$$) {
- my ($queue, $machine, $jid) = @_;
- my %s = ();
- my $sf = $queue->status_file($machine, $jid);
- if (open S, '<', $sf) {
- while (<S>) {
- chomp;
- /^(\w+):\s*(.*)/ or die "Parse error in $sf";
- $s{$1} = $2;
- }
- close S;
- }
- return \%s;
-}
-
-sub write_job_status($$$$) {
- my ($queue, $machine, $jid, $stat) = @_;
- my $sf = $queue->status_file($machine, $jid);
- open S, '>', $sf or die "Cannot create $sf: $!";
- for my $k (sort keys %$stat) {
- print S "$k: ", $stat->{$k}, "\n";
- }
- close S;
-}