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# Copyright (C) 2005 Stanislav Sinyagin
#
# This program 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.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
# $Id: ExtDBI.pm,v 1.3 2011-05-19 17:30:44 ivan Exp $
# Stanislav Sinyagin <ssinyagin@yahoo.com>
## Pluggable backend module for ExternalStorage
## Stores data in a generic SQL database
# We use some internals of Torrus::SQL::SrvExport, but
# handle the SQL by ourselves, for better efficiency.
package Torrus::Collector::ExtDBI;
use strict;
use DBI;
use Date::Format;
use Torrus::SQL::SrvExport;
use Torrus::Log;
$Torrus::Collector::ExternalStorage::backendInit =
\&Torrus::Collector::ExtDBI::backendInit;
$Torrus::Collector::ExternalStorage::backendOpenSession =
\&Torrus::Collector::ExtDBI::backendOpenSession;
$Torrus::Collector::ExternalStorage::backendStoreData =
\&Torrus::Collector::ExtDBI::backendStoreData;
$Torrus::Collector::ExternalStorage::backendCloseSession =
\&Torrus::Collector::ExtDBI::backendCloseSession;
# Optional SQL connection subtype, configurable from torrus-siteconfig.pl
our $subtype;
my $dbh;
my $sth;
sub backendInit
{
my $collector = shift;
my $token = shift;
}
sub backendOpenSession
{
$dbh = Torrus::SQL::SrvExport->dbh( $subtype );
if( defined( $dbh ) )
{
if ( $dbh->{Driver}->{Name} =~ /mysql/i ) {
$dbh->do('SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED');
$dbh->commit();
}
$sth = $dbh->prepare( Torrus::SQL::SrvExport->sqlInsertStatement() );
if( not defined( $sth ) )
{
Error('Error preparing the SQL statement: ' . $dbh->errstr);
}
}
}
sub backendStoreData
{
my $timestamp = shift;
my $serviceid = shift;
my $value = shift;
my $interval = shift;
if( defined( $dbh ) and defined( $sth ) )
{
my $datestr = time2str('%Y-%m-%d', $timestamp);
my $timestr = time2str('%H:%M:%S', $timestamp);
if( isDebug() )
{
Debug('Updating SQL database: ' .
join(', ', $datestr, $timestr,
$serviceid, $value, $interval ));
}
if( $sth->execute( $datestr, $timestr,
$serviceid, $value, $interval ) )
{
return 1;
}
else
{
Error('Error executing SQL: ' . $dbh->errstr);
}
}
return undef;
}
sub backendCloseSession
{
undef $sth;
if( defined( $dbh ) )
{
$dbh->commit();
$dbh->disconnect();
undef $dbh;
}
}
1;
# Local Variables:
# mode: perl
# indent-tabs-mode: nil
# perl-indent-level: 4
# End:
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