Basic Controller

HelloController.java

package hello;

import javax.enterprise.context.ApplicationScoped;
import javax.inject.Inject;
import javax.inject.Named;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.criteria.CriteriaQuery;
import javax.transaction.Transactional;
import java.util.List;

@Named
@ApplicationScoped
public class HelloController {
    @Inject
    private Hello hello;

    @PersistenceContext
    private EntityManager em;

    public List<Hello> helloSoFar() {
        CriteriaQuery<Hello> cq = this.em.getCriteriaBuilder().createQuery(Hello.class);
        cq.select(cq.from(Hello.class));
        return this.em.createQuery(cq).getResultList();
    }

    @Transactional
    public void storeName(Hello hello) {
        em.persist(hello);
    }
}