MDL-37658 add new logging API with basic implemenation

lib/classes/task/delete_logs_task.php

@@ -1,58 +0,0 @@
-<?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/>.
-
-/**
- * A scheduled task.
- *
- * @package    core
- * @copyright  2013 onwards Martin Dougiamas  http://dougiamas.com
- * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
-namespace core\task;
-
-/**
- * Simple task to delete old log records.
- */
-class delete_logs_task extends scheduled_task {
-
-    /**
-     * Get a descriptive name for this task (shown to admins).
-     *
-     * @return string
-     */
-    public function get_name() {
-        return get_string('taskdeletelogs', 'admin');
-    }
-
-    /**
-     * Do the job.
-     * Throw exceptions on errors (the job will be retried).
-     */
-    public function execute() {
-        global $CFG, $DB;
-
-        $timenow = time();
-
-        // Delete old logs to save space.
-        // Value in days.
-        if (!empty($CFG->loglifetime)) {
-            $loglifetime = $timenow - ($CFG->loglifetime * 3600 * 24);
-            $DB->delete_records_select("log", "time < ?", array($loglifetime));
-        }
-
-    }
-
-}