From 2c6546d7f81a830cf0a1f5c16bb7c8746731e0c2 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Sun, 29 Mar 2015 18:00:42 +0200
Subject: [PATCH] New format of job IDs

Switched to "YYYYMMDD-HHMM-hash", where "hash" consists of 8 hex
digits obtained by hashing the current time, PID and a sequence number.
---
 lib/perl/BEX/Job.pm | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/perl/BEX/Job.pm b/lib/perl/BEX/Job.pm
index 986028e..62d076d 100644
--- a/lib/perl/BEX/Job.pm
+++ b/lib/perl/BEX/Job.pm
@@ -1,5 +1,5 @@
 # Batch EXecutor -- Jobs
-# (c) 2011-2013 Martin Mares <mj@ucw.cz>
+# (c) 2011-2015 Martin Mares <mj@ucw.cz>
 
 use strict;
 use warnings;
@@ -7,6 +7,7 @@ use warnings;
 package BEX::Job;
 
 use POSIX ();
+use Digest::SHA;
 
 our $job_cnt = 0;
 
@@ -24,7 +25,9 @@ sub new($;$) {
 		$job->{'ID'} = $id;
 	} else {
 		$job_cnt++;
-		$job->{'ID'} = POSIX::strftime("%Y%m%d-%H%M%S-$$-$job_cnt", localtime);
+		my $dt = POSIX::strftime("%Y%m%d-%H%M%S", localtime);
+		my $hash = Digest::SHA::sha1_hex(join(":", $dt, $$, $job_cnt));
+		$job->{'ID'} = $dt . '-' . substr($hash, 0, 8);
 	}
 	$job->{'Subject'} = '';
 	return $job;
-- 
2.39.5