Process manager in event-engine

[arnedesmedt]

Hello,

Is it possible to use some sort of process manager for the generated events?

Thx in advance,
Arne

[codeliner]

Hi,

ProcessManagers listen on events $eventEngine->on(<event_name>, <proces_manager>) like described in the tutorial

If a process manager should dispatch a new command handled by the same app, you can also use a short cut by returning a command from a static method:

final class MyProcessManager
{
  public static function onSomethingHappened(Message $somethingHappened): array
  {
    // Return command tuple (when using PrototypingFlavour or a command instance for other Flavour)
    return [
      Command::DO_SOEMTHING_AFTER_EVENT,
      $somethingHappend->payload(), // Map payload from event to command if needed
      [ /* optional metadata array */ ]
    ];
  }
}

// Register the process manager in a Description using callable array syntax
$eventEngine->on(Event::SOMETHING_HAPPENED, [MyProcessManager::class, 'onSomethingHappened']);

The short cut is not documented yet as this is a relatively new feature. The way shown in the Tutorial is the preferred way when the process manager requires dependencies. With the short cut you avoid the round trip to the DI container which is nice for simple IF THIS THAN THAT scenarios.

[arnedesmedt]

Thank you very much for the explanation!

I forgot that their was a process manager subtitle in the tutorial.