*:class:`Symfony\\Component\\Messenger\\Event\\WorkerRunningEvent`

*:class:`Symfony\\Component\\Messenger\\Event\\WorkerStoppedEvent`

Additional Handler Arguments

It's possible to have messenger pass additional data to the message handler using the

:class:`Symfony\\Component\\Messenger\\Stamp\\HandlerArgumentsStamp`. Add this stamp to

the envelope in a middleware and fill it with any additional data you want to have

available in the handler.

// src/Library/Messenger/AdditionalArgumentMiddleware.php

namespace App\Library\Messenger;

use Symfony\Component\Messenger\Envelope;

use Symfony\Component\Messenger\Middleware\MiddlewareInterface;

use Symfony\Component\Messenger\Middleware\StackInterface;

use Symfony\Component\Messenger\Stamp\HandlerArgumentsStamp;

class AdditionalArgumentMiddleware implements MiddlewareInterface

{

public function handle(Envelope $envelope, StackInterface $stack): Envelope

{

$envelope = $envelope->with(

new HandlerArgumentsStamp(

[

$this->resolveAdditionalArgument($envelope->getMessage()),

],

),

)

return $stack->next()->handle($envelope, $stack);

}

private function resolveAdditionalArgument(object $message): mixed

{

// ...

}

}

Then your handler will look like this:

// src/MessageHandler/SmsNotificationHandler.php

namespace App\MessageHandler;

use App\Message\SmsNotification;

class SmsNotificationHandler

{

public function __invoke(SmsNotification $message, mixed $additionalArgument)

{

// ...

}

}

..versionadded::6.2

The HandlerArgumentsStamp was introduced in Symfony 6.2.

Multiple Buses, Command & Event Buses