package org.legrog.application;

import org.legrog.entities.Book;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.ejb.Stateless;
import javax.enterprise.inject.Alternative;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.criteria.CriteriaQuery;
import java.util.List;

@Stateless     @Alternative
public class BookServiceOld implements BookService{

    Logger logger = LoggerFactory.getLogger(getClass());

    @Inject
    private EntityManager entityManager;

    public void addBook(Book book)
    {
        logger.debug("old one");
      entityManager.persist(book);
    }


    public List<Book> getAllBooks()
    {
        CriteriaQuery<Book> cq = entityManager.getCriteriaBuilder().createQuery(Book.class);
        cq.select(cq.from(Book.class));
        return entityManager.createQuery(cq).getResultList();
    }

    public BookServiceOld() {
    }

    // package only constructor dedicated to injection
    BookServiceOld(EntityManager entityManager) {
        this.entityManager = entityManager;
    }
}