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package de.uniba.dsg.dsam.backend.beans; | |
import de.uniba.dsg.dsam.backend.entities.BeverageEntity; | |
import de.uniba.dsg.dsam.backend.entities.OrderEntity; | |
import de.uniba.dsg.dsam.backend.entities.OrderQuantity; | |
import de.uniba.dsg.dsam.model.OrderBeverageDTO; | |
import de.uniba.dsg.dsam.persistence.BeverageManagement; | |
import de.uniba.dsg.dsam.persistence.OrderManagement; | |
import javax.ejb.EJB; | |
import javax.ejb.Local; | |
import javax.ejb.Stateless; | |
import javax.persistence.EntityManager; | |
import javax.persistence.PersistenceContext; | |
import javax.persistence.PersistenceContextType; | |
import java.util.List; | |
import java.util.logging.Logger; | |
@Stateless | |
@Local(OrderManagement.class) | |
public class OrderManagementBean implements OrderManagement { | |
private static final Logger logger = Logger.getLogger(OrderManagementBean.class.getName()); | |
@PersistenceContext(type = PersistenceContextType.TRANSACTION) | |
EntityManager em; | |
@EJB | |
BeverageManagement beverageManagement; | |
@Override | |
public long saveOrder(OrderBeverageDTO orderBeverageDTO) { | |
OrderEntity order = new OrderEntity(); | |
em.persist(order); | |
em.flush(); | |
orderBeverageDTO | |
.data | |
.forEach( | |
(OrderBeverageDTO.SingleOrder s) | |
-> em.persist( | |
new OrderQuantity( | |
order, | |
em.find(BeverageEntity.class, s.id), | |
s.quantity | |
) | |
) | |
); | |
updateBeverageQuantity(orderBeverageDTO); | |
return order.getId(); | |
} | |
@Override | |
public int revenue() { | |
List<OrderQuantity> list = em.createNamedQuery("OrderQuantity.allOrder", OrderQuantity.class) | |
.getResultList(); | |
int revenue = 0; | |
for (OrderQuantity q : list) { | |
revenue += q.getBeverageEntity().getPrice() * q.getQuantity(); | |
} | |
return revenue; | |
} | |
public void updateBeverageQuantity(OrderBeverageDTO orderBeverageDTO) { | |
orderBeverageDTO.data.forEach( | |
(OrderBeverageDTO.SingleOrder s) | |
-> { | |
BeverageEntity beverageEntity = em.find(BeverageEntity.class, s.id); | |
int updatedQuantity = beverageEntity.getQuantity() - s.quantity; | |
beverageEntity.setQuantity(updatedQuantity); | |
em.flush(); | |
} | |
); | |
} | |
} |
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