File:
[LON-CAPA] /
loncom /
metadata_database /
cleanup_database.pl
Revision
1.7:
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Mon Nov 20 17:07:57 2006 UTC (17 years, 10 months ago) by
albertel
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MAIN
CVS tags:
version_2_9_X,
version_2_9_99_0,
version_2_9_1,
version_2_9_0,
version_2_8_X,
version_2_8_99_1,
version_2_8_99_0,
version_2_8_2,
version_2_8_1,
version_2_8_0,
version_2_7_X,
version_2_7_99_1,
version_2_7_99_0,
version_2_7_1,
version_2_7_0,
version_2_6_X,
version_2_6_99_1,
version_2_6_99_0,
version_2_6_3,
version_2_6_2,
version_2_6_1,
version_2_6_0,
version_2_5_X,
version_2_5_99_1,
version_2_5_99_0,
version_2_5_2,
version_2_5_1,
version_2_5_0,
version_2_4_X,
version_2_4_99_0,
version_2_4_2,
version_2_4_1,
version_2_4_0,
version_2_3_X,
version_2_3_99_0,
version_2_3_2,
version_2_3_1,
version_2_3_0,
version_2_2_99_1,
version_2_2_99_0,
version_2_11_1,
version_2_11_0_RC3,
version_2_11_0_RC2,
version_2_11_0_RC1,
version_2_11_0,
version_2_10_X,
version_2_10_1,
version_2_10_0_RC2,
version_2_10_0_RC1,
version_2_10_0,
loncapaMITrelate_1,
language_hyphenation_merge,
language_hyphenation,
bz6209-base,
bz6209,
bz5969,
bz2851,
PRINT_INCOMPLETE_base,
PRINT_INCOMPLETE,
HEAD,
GCI_3,
GCI_2,
GCI_1,
BZ5971-printing-apage,
BZ5434-fox,
BZ4492-merge,
BZ4492-feature_horizontal_radioresponse
- older DBI versions don't support the arrarref usage
#!/usr/bin/perl
# The LearningOnline Network
# cleanup_database.pl Remove stale temporary search results.
#
# $Id: cleanup_database.pl,v 1.7 2006/11/20 17:07:57 albertel Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
#################################################
=pod
=head1 NAME
cleanup_database.pl - Remove temporary tables from the LON-CAPA MySQL database.
=head1 SYNOPSIS
cleanup_database.pl drops tables from the LON-CAPA MySQL database if their
comment is 'temporary' and they have not been modified in a given number
of seconds.
=head1 DESCRIPTION
There are two command line arguements possible.
=over 4
=item help
Display a brief help message.
=item killtime <time>
The time in seconds that must have passed since the last update of a table
before it will be dropped.
=back
The following invocation is equivalent to the default:
cleanup_database.pl --killtime 86400
If you desire the immediate cleanup of temporary tables, use the following:
cleanup_database.pl --killtime 0
Depending on permissions, you may have to run this script as root.
=cut
#################################################
use strict;
use lib '/home/httpd/lib/perl/';
use LONCAPA::Configuration;
use Getopt::Long;
use Time::Local;
use DBI;
my $help = 0;
my $killtime = 86400*2;
GetOptions( "killtime=s" => \$killtime,
"help" => \$help );
if ($help) {
print <<ENDHELP;
cleanup_database.pl Cleans up the LON-CAPA MySQL database by removing
temporary tables.
Command line arguements
--killtime <number> The number of seconds a temporary table is allowed
to live. Defaults to 86400 (1 day)
--help Print out this help message.
Examples:
cleanup_database.pl --killtime 0
cleanup_database.pl --killtime 86400
Note: You will probably need to execute this script as root.
ENDHELP
exit;
}
# --------------- Read loncapa_apache.conf and loncapa.conf and get variables
my %perlvar = %{&LONCAPA::Configuration::read_conf('loncapa.conf')};
delete $perlvar{'lonReceipt'}; # remove since sensitive and not needed
my $dbh;
# ------------------------------------- Make sure that database can be accessed
unless ($dbh = DBI->connect("DBI:mysql:loncapa","www",
$perlvar{'lonSqlAccess'},
{RaiseError=>0,PrintError=>0}
)
) {
print "Cannot connect to database!\n";
exit;
}
my $sth = $dbh->prepare("SHOW TABLE STATUS");
$sth->execute();
my $results = $sth->fetchall_hashref('Name');
foreach my $name (keys(%$results)) {
next if ($results->{$name}{Comment} ne 'temporary');
my $tabletime = $results->{$name}{Update_time};
# Times are like: 2002-07-25 10:17:08
my ($year,$month,$day,$hour,$min,$sec)=
($tabletime =~ /(\d+)-(\d+)-(\d+) (\d+):(\d+):(\d+)/);
my $epoch_seconds = timelocal($sec,$min,$hour,$day,$month-1,$year-1900);
if ((time - $epoch_seconds) > $killtime) {
$dbh->do('DROP TABLE '.$name);
}
}
$sth->finish();
# --------------------------------------------------- Close database connection
$dbh->disconnect;
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