ReaderFacade.java
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package fi.insomnia.bortal.facade;
import java.util.List;
import javax.ejb.EJB;
import javax.ejb.LocalBean;
import javax.ejb.Stateless;
import javax.persistence.TypedQuery;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import fi.insomnia.bortal.beans.EventBeanLocal;
import fi.insomnia.bortal.model.LanEvent;
import fi.insomnia.bortal.model.Reader;
import fi.insomnia.bortal.model.Reader_;
@Stateless
@LocalBean
public class ReaderFacade extends IntegerPkGenericFacade<Reader> {
private static final Logger logger = LoggerFactory.getLogger(ReaderFacade.class);
@EJB
private EventBeanLocal eventbean;
public ReaderFacade() {
super(Reader.class);
}
public Reader findByIdent(LanEvent event, String reader) {
CriteriaBuilder cb = getEm().getCriteriaBuilder();
CriteriaQuery<Reader> cq = cb.createQuery(Reader.class);
Root<Reader> root = cq.from(Reader.class);
cq.select(root);
cq.where(
cb.equal(root.get(Reader_.event), event),
cb.equal(root.get(Reader_.identification), reader));
TypedQuery<Reader> q = getEm().createQuery(cq);
return getSingleNullableResult(q);
}
public Reader findOrCreateByIdent(String ident) {
LanEvent event = eventbean.getCurrentEvent();
Reader ret = findByIdent(event, ident);
logger.info("Tried to return reader {} from event {}", ret, event);
if (ret == null) {
ret = createIdent(this, event, ident);
}
return ret;
}
private static synchronized Reader createIdent(ReaderFacade rf, LanEvent ev, String ident) {
Reader ret = rf.findByIdent(ev, ident);
if (ret == null) {
ret = new Reader(ev, ident);
ret.setDescription("Automagically created");
rf.create(ret);
logger.info("Created new reader for ident {} reader {}", ident, ev);
}
return ret;
}
public List<Reader> findAllForEvent() {
CriteriaBuilder cb = getEm().getCriteriaBuilder();
CriteriaQuery<Reader> cq = cb.createQuery(Reader.class);
Root<Reader> root = cq.from(Reader.class);
cq.where(cb.equal(root.get(Reader_.event), eventbean.getCurrentEvent()));
return getEm().createQuery(cq).getResultList();
}
public Reader findReader(Integer readerid) {
CriteriaBuilder cb = getEm().getCriteriaBuilder();
CriteriaQuery<Reader> cq = cb.createQuery(Reader.class);
Root<Reader> root = cq.from(Reader.class);
cq.where(cb.equal(root.get(Reader_.id), readerid),
cb.equal(root.get(Reader_.event), eventbean.getCurrentEvent()));
return getSingleNullableResult(getEm().createQuery(cq));
}
}