# Copyright (c) 2008 bivio Software, Inc.  All Rights Reserved.
#
# Visit http://www.bivio.biz for more info.
# 
# This library is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 2.1 of the
# License, or (at your option) any later version.
# 
# This library is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
# 
# You should have received a copy of the GNU Lesser General Public
# License along with this library;  If not, you may get a copy from:
# http://www.opensource.org/licenses/lgpl-license.html
# 
# $Id: RequestId.pm,v 1.1 2008/09/10 21:47:28 nagler Exp $
package Bivio::Agent::RequestId;
use strict;
use Bivio::Base 'Bivio::UNIVERSAL';
use Digest::MD5 ();
use Sys::Hostname ();

our($VERSION) = sprintf('%d.%02d', q$Revision: 1.1 $ =~ /\d+/g);
my($_COUNT) = 0;
my($_BASE);
my($_DT) = b_use('Type.DateTime');

sub current {
    my($proto, $req) = @_;
    return $req->get_if_exists_else_put($proto->package_name => sub {
	return (
	    $_BASE ||= substr(
		Digest::MD5::md5_hex(
		    Sys::Hostname::hostname() . $_DT->now_as_file_name . $$,
		),
		-16,
	    )
	) . sprintf('%08x', ++$_COUNT);
    });
}

sub clear_current {
    my($proto, $req) = @_;
    $req->delete($proto->package_name);
    return;
}

1;