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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Messenger\Handler;
/**
* Handlers can implement this interface to handle multiple messages.
*
* @author Samuel Roze <[email protected]>
*/
interface MessageSubscriberInterface extends MessageHandlerInterface
{
/**
* Returns a list of messages to be handled.
*
* It returns a list of messages like in the following example:
*
* yield MyMessage::class;
*
* It can also change the priority per classes.
*
* yield FirstMessage::class => ['priority' => 0];
* yield SecondMessage::class => ['priority' => -10];
*
* It can also specify a method, a priority, a bus and/or a transport per message:
*
* yield FirstMessage::class => ['method' => 'firstMessageMethod'];
* yield SecondMessage::class => [
* 'method' => 'secondMessageMethod',
* 'priority' => 20,
* 'bus' => 'my_bus_name',
* 'from_transport' => 'your_transport_name',
* ];
*
* The benefit of using `yield` instead of returning an array is that you can `yield` multiple times the
* same key and therefore subscribe to the same message multiple times with different options.
*
* The `__invoke` method of the handler will be called as usual with the message to handle.
*/
public static function getHandledMessages(): iterable;
}