Mercurial > lada > lada-server
view src/main/java/de/intevation/lada/data/LMessungRepository.java @ 213:8fdb699405aa
Refactored repositories to avoid race conditions.
author | Raimund Renkert <rrenkert@intevation.de> |
---|---|
date | Wed, 03 Jul 2013 15:54:00 +0200 |
parents | 253160854d79 |
children | f0482fa04e2b |
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package de.intevation.lada.data; import java.util.List; import java.util.Map; import javax.ejb.EJBTransactionRolledbackException; import javax.enterprise.context.ApplicationScoped; import javax.inject.Inject; import javax.inject.Named; import javax.persistence.EntityExistsException; import javax.persistence.EntityManager; import javax.persistence.TransactionRequiredException; import javax.persistence.criteria.CriteriaBuilder; import javax.persistence.criteria.CriteriaQuery; import javax.persistence.criteria.Root; import de.intevation.lada.manage.Manager; import de.intevation.lada.model.LMessung; import de.intevation.lada.rest.Response; import de.intevation.lada.validation.ValidationException; import de.intevation.lada.validation.Validator; /** * This Container is an interface to request, filter and select LMessung * obejcts from the connected database. * * @author <a href="mailto:rrenkert@intevation.de">Raimund Renkert</a> */ @ApplicationScoped @Named("lmessungrepository") public class LMessungRepository implements Repository { /** * The entitymanager managing the data. */ @Inject private EntityManager em; /** * Manager class for LPRobe. Used to manipulate data objects. */ @Inject @Named("datamanager") private Manager manager; @Inject @Named("lmessungvalidator") private Validator validator; @Override public EntityManager getEntityManager() { return this.em; } /** * Filter object list by the given criteria. * * @param criteria * @return List of objects. */ public <T> Response filter(CriteriaQuery<T> filter) { List<T> result = em.createQuery(filter).getResultList(); return new Response(true, 200, result); } /** * Get all objects of type <link>clazz</link>from database. * * @param clazz The class type. * @return List of objects. */ public <T> Response findAll(Class<T> clazz) { CriteriaBuilder builder = em.getCriteriaBuilder(); CriteriaQuery<T> criteria = builder.createQuery(clazz); Root<T> member = criteria.from(clazz); criteria.select(member); List<T> result = em.createQuery(criteria).getResultList(); return new Response(true, 200, result); } /** * Find a single object identified by its id. * * @param clazz The class type. * @param id The object id. * @return The requested object of type clazz */ public <T> Response findById(Class<T> clazz, String id) { T item = em.find(clazz, id); if (item == null) { return new Response(false, 600, null); } return new Response(true, 200, item); } /** * Validate and persist a new LProbe object. * * @param probe The new LProbe object * @return Response. */ public Response create(Object object) { if (!(object instanceof LMessung)) { return new Response(false, 602, object); } LMessung messung = (LMessung)object; Response response = new Response(true, 200, messung); // Try to save the new LMessung. try { Map<String, Integer> warnings = validator.validate(messung); manager.create(messung); response.setWarnings(warnings); return response; } catch (EntityExistsException eee) { response.setSuccess(false); response.setMessage(601); } catch (IllegalArgumentException iae) { response.setSuccess(false); response.setMessage(602); } catch (TransactionRequiredException tre) { response.setSuccess(false); response.setMessage(603); } catch (ValidationException ve) { response.setSuccess(false); response.setMessage(604); response.setErrors(ve.getErrors()); response.setWarnings(ve.getWarnings()); } catch (EJBTransactionRolledbackException te) { response.setSuccess(false); response.setMessage(604); } return response; } public Response update(Object object) { if (!(object instanceof LMessung)) { return new Response(false, 602, object); } LMessung messung = (LMessung)object; Response response = new Response(true, 200, messung); // Try to save the new LProbe. try { Map<String, Integer> warnings = validator.validate(messung); manager.update(messung); response.setWarnings(warnings); return response; } catch (EntityExistsException eee) { response.setSuccess(false); response.setMessage(601); } catch (IllegalArgumentException iae) { response.setSuccess(false); response.setMessage(602); } catch (TransactionRequiredException tre) { response.setSuccess(false); response.setMessage(603); } catch (ValidationException ve) { response.setSuccess(false); response.setMessage(604); response.setErrors(ve.getErrors()); response.setWarnings(ve.getWarnings()); } catch (EJBTransactionRolledbackException te) { response.setSuccess(false); response.setMessage(604); } return response; } @Override public Response delete(Object object) { // TODO Auto-generated method stub return null; } }