Open slot

The slot opening happens in 9d and 11.

Opening a slot is an intended side effect of canceling the slot. You will see in the diagram at 9d and 11 where the OpenSlot Lambda gets triggered. This is also clearly outlined in the configuration file:

code/Reservation/Reservation/serverless.yml

OpenSlot:
  handler: src/infrastructure/adapters/web/OpenSlot.handler
  description: Open a slot
  events:
    # You can activate this to allow for HTTP-based calls
    #- http:
    # method: POST
    # path: /OpenSlot
    - eventBridge:
  eventBus: ${self:custom.config.domainBusName} # Create new EventBridge bus
  pattern:
  source:
    - getaroom.reservation.cancelled
  deadLetterQueueArn:
  Fn::GetAtt:
    - ReservationBusDlq
    - Arn
  retryPolicy:
  maximumEventAge: 3600
  maximumRetryAttempts: 3

And still another boring, but functional use case with no surprises.

code/Reservation/Reservation/src/application/usecases/OpenSlotUseCase.ts

export async function OpenSlotUseCase(
  dependencies: Dependencies,
  slotId: SlotId
) {
  const slotLoader = createSlotLoaderService(dependencies.repository);
  const slotDto = await slotLoader.loadSlot(slotId);

  const reservationService = new ReservationService(dependencies);
  await reservationService.open(slotDto);
}