source: moodle/trunk/fuentes/lib/classes/task/backup_cleanup_task.php @ 1331

Last change on this file since 1331 was 136, checked in by mabarracus, 4 years ago

Ported code to xenial

File size: 2.2 KB
Line 
1<?php
2// This file is part of Moodle - http://moodle.org/
3//
4// Moodle is free software: you can redistribute it and/or modify
5// it under the terms of the GNU General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8//
9// Moodle is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13//
14// You should have received a copy of the GNU General Public License
15// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
16
17/**
18 * A scheduled task.
19 *
20 * @package    core
21 * @copyright  2013 onwards Martin Dougiamas  http://dougiamas.com
22 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
23 */
24namespace core\task;
25
26/**
27 * Simple task to delete old backup records.
28 */
29class backup_cleanup_task extends scheduled_task {
30
31    /**
32     * Get a descriptive name for this task (shown to admins).
33     *
34     * @return string
35     */
36    public function get_name() {
37        return get_string('taskbackupcleanup', 'admin');
38    }
39
40    /**
41     * Do the job.
42     * Throw exceptions on errors (the job will be retried).
43     */
44    public function execute() {
45        global $DB;
46
47        $timenow = time();
48
49        // Delete old backup_controllers and logs.
50        $loglifetime = get_config('backup', 'loglifetime');
51        if (!empty($loglifetime)) {  // Value in days.
52            $loglifetime = $timenow - ($loglifetime * 3600 * 24);
53            // Delete child records from backup_logs.
54            $DB->execute("DELETE FROM {backup_logs}
55                           WHERE EXISTS (
56                               SELECT 'x'
57                                 FROM {backup_controllers} bc
58                                WHERE bc.backupid = {backup_logs}.backupid
59                                  AND bc.timecreated < ?)", array($loglifetime));
60            // Delete records from backup_controllers.
61            $DB->execute("DELETE FROM {backup_controllers}
62                          WHERE timecreated < ?", array($loglifetime));
63        }
64
65    }
66
67}
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