Current File : /home/vacivi36/ava/admin/tool/log/store/standard/classes/task/cleanup_task.php
<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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 3 of the License, or
// (at your option) any later version.
//
// Moodle 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 Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Standard log reader/writer.
*
* @package logstore_standard
* @copyright 2014 Petr Skoda {@link http://skodak.org}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace logstore_standard\task;
defined('MOODLE_INTERNAL') || die();
class cleanup_task extends \core\task\scheduled_task {
/**
* Get a descriptive name for this task (shown to admins).
*
* @return string
*/
public function get_name() {
return get_string('taskcleanup', 'logstore_standard');
}
/**
* Do the job.
* Throw exceptions on errors (the job will be retried).
*/
public function execute() {
global $DB;
$loglifetime = (int)get_config('logstore_standard', 'loglifetime');
if (empty($loglifetime) || $loglifetime < 0) {
return;
}
$loglifetime = time() - ($loglifetime * 3600 * 24); // Value in days.
$lifetimep = array($loglifetime);
$start = time();
while ($min = $DB->get_field_select("logstore_standard_log", "MIN(timecreated)", "timecreated < ?", $lifetimep)) {
// Break this down into chunks to avoid transaction for too long and generally thrashing database.
// Experiments suggest deleting one day takes up to a few seconds; probably a reasonable chunk size usually.
// If the cleanup has just been enabled, it might take e.g a month to clean the years of logs.
$params = array(min($min + 3600 * 24, $loglifetime));
$DB->delete_records_select("logstore_standard_log", "timecreated < ?", $params);
if (time() > $start + 300) {
// Do not churn on log deletion for too long each run.
break;
}
}
mtrace(" Deleted old log records from standard store.");
}
}
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