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<?php
namespace Laminas\EventManager;
/**
* Interface for shared event listener collections
*/
interface SharedEventManagerInterface
{
/**
* Attach a listener to an event emitted by components with specific identifiers.
*
* @param string $identifier Identifier for event emitting component
* @param string $eventName
* @param callable $listener Listener that will handle the event.
* @param int $priority Priority at which listener should execute
*/
public function attach($identifier, $eventName, callable $listener, $priority = 1);
/**
* Detach a shared listener.
*
* Allows detaching a listener from one or more events to which it may be
* attached.
*
* @param callable $listener Listener to detach.
* @param null|string $identifier Identifier from which to detach; null indicates
* all registered identifiers.
* @param null|string $eventName Event from which to detach; null indicates
* all registered events.
* @return void
* @throws Exception\InvalidArgumentException For invalid identifier arguments.
* @throws Exception\InvalidArgumentException For invalid event arguments.
*/
public function detach(callable $listener, $identifier = null, $eventName = null);
/**
* Retrieve all listeners for given identifiers
*
* @param array $identifiers
* @param string $eventName
* @return array
*/
public function getListeners(array $identifiers, $eventName);
/**
* Clear all listeners for a given identifier, optionally for a specific event
*
* @param string $identifier
* @param null|string $eventName
*/
public function clearListeners($identifier, $eventName = null);
}