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SharedEventManagerInterface.php
01 <?php
02 /**
03 * Zend Framework (http://framework.zend.com/)
04 *
05 * @link http://github.com/zendframework/zf2 for the canonical source repository
06 * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
07 * @license http://framework.zend.com/license/new-bsd New BSD License
08 */
09
10 namespace Zend\EventManager;
11
12 use Zend\Stdlib\CallbackHandler;
13 use Zend\Stdlib\PriorityQueue;
14
15 /**
16 * Interface for shared event listener collections
17 */
18 interface SharedEventManagerInterface
19 {
20 /**
21 * Retrieve all listeners for a given identifier and event
22 *
23 * @param string|int $id
24 * @param string|int $event
25 * @return false|PriorityQueue
26 */
27 public function getListeners($id, $event);
28
29 /**
30 * Attach a listener to an event
31 *
32 * @param string|array $id Identifier(s) for event emitting component(s)
33 * @param string $event
34 * @param callable $callback PHP Callback
35 * @param int $priority Priority at which listener should execute
36 * @return CallbackHandler|array Either CallbackHandler or array of CallbackHandlers
37 */
38 public function attach($id, $event, $callback, $priority = 1);
39
40 /**
41 * Detach a listener from an event offered by a given resource
42 *
43 * @param string|int $id
44 * @param CallbackHandler $listener
45 * @return bool Returns true if event and listener found, and unsubscribed; returns false if either event or listener not found
46 */
47 public function detach($id, CallbackHandler $listener);
48
49 /**
50 * Retrieve all registered events for a given resource
51 *
52 * @param string|int $id
53 * @return array
54 */
55 public function getEvents($id);
56
57 /**
58 * Clear all listeners for a given identifier, optionally for a specific event
59 *
60 * @param string|int $id
61 * @param null|string $event
62 * @return bool
63 */
64 public function clearListeners($id, $event = null);
65 }
66