Preparing events

The package will listen for events that implement the \Spatie\EventSourcing\ShouldBeStored interface. This is an empty interface that simply signals to the package that the event should be stored.

You can quickly create an event that implements ShouldBeStored by running this artisan command:

php artisan make:storable-event NameOfYourEvent

Here's an example of such event:

namespace App\Events;

use Spatie\EventSourcing\ShouldBeStored;

class MoneyAdded implements ShouldBeStored
{
    /** @var string */
    public $accountUuid;

    /** @var int */
    public $amount;

    public function __construct(string $accountUuid, int $amount)
    {
        $this->accountUuid = $accountUuid;

        $this->amount = $amount;
    }
}

Whenever an event that implements ShouldBeStored is fired it will be serialized and written in the stored_events table. Immediately after that, the event will be passed to all projectors and reactors.

If your event has an eloquent model, it should also use the Illuminate\Queue\SerializesModels trait so we are able to serialize these models correctly.

##Specifying a queue

When a StoredEvent is created, we'll dispatch a job on the queue defined in the queue key of the event-sourcing config file. Queued projectors and reactors will get called when the job is executed on the queue.

On an event you can override the queue that should be used by adding a queue property.

namespace App\Events;

use Spatie\EventSourcing\ShouldBeStored;

class MyEvent implements ShouldBeStored
{
    public $queue = 'alternativeQueue';

    ...
}