3 * A HandleableTask interface
5 * @author Roland Haeder <webmaster@ship-simu.org>
7 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009, 2010 Hub Developer Team
8 * @license GNU GPL 3.0 or any newer version
9 * @link http://www.ship-simu.org
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 interface HandleableTask extends Handleable {
26 * Registers a task with a task handler. This method throws a
27 * TaskAlreadyRegisteredException if the task has already been registered
29 * @param $taskName A task name to register the task on
30 * @param $taskInstance The instance we should register as a task
33 function registerTask ($taskName, Visitable $taskInstance);
36 * Checks wether tasks are left including idle task.
38 * @return $tasksLeft Wether there are tasks left to handle
40 function hasTasksLeft ();
43 * Handles all tasks by checking if they should startup or if it is their
44 * turn to run. You should use this method in a while() loop in conjuntion
45 * with hasTasksLeft() so you can e.g. shutdown by adding a ShutdownTask
46 * which will attempt to remove all tasks from the task handler.
50 function handleTasks ();