public Cargo create(String originUnLocode, String destinationUnLocode, Date arrivalDeadline) {
TrackingId trackingId = cargoRepository.nextTrackingId();
Location origin = locationRepository.findLocationByUnLocode(originUnLocode);
Location destination = locationRepository.findLocationByUnLocode(destinationUnLocode);
RouteSpecification routeSpecification =
routeSpecificationFactory.create(origin, destination, arrivalDeadline);
UnitOfWork uow = uowf.currentUnitOfWork();
EntityBuilder<Cargo> builder = uow.newEntityBuilder(Cargo.class, trackingId.id().get());
Cargo.State instanceState = builder.instanceFor(Cargo.State.class);
instanceState.routeSpecification().set(routeSpecification);
instanceState.origin().set(origin);
Cargo cargo = builder.newInstance();
logger.info("Booked new cargo with tracking id " + cargo.trackingId().id().get());
return cargo;
}
