Description
I need to execute a task on a regular basis.

To manage this task I use Messenger, so I can execute it async.

Practically I follow this flow:

1. Dispatch the message the first time
2. Execute the message the first time
3. Schedule the message again to be executed after a certain amount of time (for example, 1 minute)
4. Execute the message after 1 minute
5. Schedule the message to be executed again 1 minute later
6. ... and so on, for... eternity 😅

Now, instead of dispatching a new message each time from inside my MessageHandler, I created a stamp RescheduleStamp and a corresponding middleware RescheduleMiddleware.

The middleware does a simple thing: if the message has a RescheduleStamp, then it schedules another message adding a DelayStamp to execute it in the future date set through the RescheduleStamp.

The RescheduleStamp uses the units of relative time formats (https://www.php.net/manual/en/datetime.formats.relative.php#datetime.formats.relative).

So, I can create a message that has to be rescheduled for eternity in a very easy way:

$message = new EternalMessage($heaven);
$this->messageBus->dispatch($message, [new RescheduleStamp(1, RescheduleStamp::PERIOD_MINUTES)]);

The constant RescheduleStamp::PERIOD_MINUTES helps avoiding errors:

class RescheduleStamp implements StampInterface
{
    public const PERIOD_SECONDS = 'seconds';
    public const PERIOD_MINUTES = 'minutes';
    public const PERIOD_HOURS = 'hours';
    public const PERIOD_DAYS = 'days';
    public const PERIOD_WEEKS = 'weeks';
    public const PERIOD_MONTHS = 'months';
    public const PERIOD_YEARS = 'years';
...

I have a working implementation that I like to merge in Symfony: WDYT?

End note:
May be related to #38459