[9.x] Passing event into viaQueue and viaConnection of Queued Listener

[sethsandaru]

Proposal this (if got approved & merged, I'll submit a doc PR)

For our project, we have a lot of Queued Listeners. At the moment, for some critical endpoints (that need to respond as fast as they can), we need to push it to a redis connection instead of sqs based on the events's data (which is impossible at the moment)

At my first try (which didn't work), I used the shouldQueue($event) to set the $connection dynamically.

After spending a bit of time reading the logic. I see that before Laravel invoking the shouldQueue, it will create a new concrete listener class to and use it to check.

And before the queue push happen, Laravel create another new concrete listener class via Reflector. Thus my $connection will never be there.

https://github.com/laravel/framework/blob/9.x/src/Illuminate/Events/Dispatcher.php#L560

With this patch, we would be able to do something like this:

public function viaConnection($event): string
{
    if ($event->useRedisQueue) {
        return 'redis';
    } 

    return config('queue.default');
}

Code & unit testing added, no breaking changes!

[sethsandaru]

Hi @taylorotwell @driesvints could you please review to see if this one makes sense?

Thanks