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annotate src/main/java/edu/harvard/iq/dataverse/DvObjectServiceBean.java @ 10:a50cf11e5178

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Rewrite LGDataverse completely upgrading to dataverse4.0
author Zoe Hong <zhong@mpiwg-berlin.mpg.de>
date Tue, 08 Sep 2015 17:00:21 +0200
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1 package edu.harvard.iq.dataverse;
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2
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3 import java.sql.Timestamp;
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4 import java.util.Date;
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5 import java.util.List;
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6 import javax.ejb.Stateless;
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7 import javax.ejb.TransactionAttribute;
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8 import static javax.ejb.TransactionAttributeType.REQUIRES_NEW;
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9 import javax.inject.Named;
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10 import javax.persistence.EntityManager;
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11 import javax.persistence.NoResultException;
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12 import javax.persistence.NonUniqueResultException;
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13 import javax.persistence.PersistenceContext;
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14 import javax.persistence.Query;
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15
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16 /**
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17 * Your goto bean for everything {@link DvObject}, that's not tied to any
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18 * concrete subclass.
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19 *
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20 * @author michael
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21 */
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22 @Stateless
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23 @Named
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24 public class DvObjectServiceBean implements java.io.Serializable {
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25
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26 @PersistenceContext(unitName = "VDCNet-ejbPU")
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27 private EntityManager em;
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28
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29 /**
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30 * @param dvoc The object we check
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31 * @return {@code true} iff the passed object is the owner of any
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32 * {@link DvObject}.
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33 */
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34 public boolean hasData(DvObjectContainer dvoc) {
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35 return em.createNamedQuery("DvObject.ownedObjectsById", Long.class)
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36 .setParameter("id", dvoc.getId())
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37 .getSingleResult() > 0;
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38 }
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39
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40 public DvObject findDvObject(Long id) {
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41 try {
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42 return em.createNamedQuery("DvObject.findById", DvObject.class)
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43 .setParameter("id", id)
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44 .getSingleResult();
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45 } catch (NoResultException | NonUniqueResultException ex) {
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46 return null;
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47 }
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48 }
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49
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50 public List<DvObject> findAll() {
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51 return em.createNamedQuery("DvObject.findAll", DvObject.class).getResultList();
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52 }
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53
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54 public DvObject updateContentIndexTime(DvObject dvObject) {
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55 /**
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56 * @todo to avoid a possible OptimisticLockException, should we merge
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57 * dvObject before we try to setIndexTime? See
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58 * https://github.com/IQSS/dataverse/commit/6ad0ebb272c8cb46368cb76784b55dbf33eea947
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59 */
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60 DvObject dvObjectToModify = findDvObject(dvObject.getId());
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61 dvObjectToModify.setIndexTime(new Timestamp(new Date().getTime()));
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62 DvObject savedDvObject = em.merge(dvObjectToModify);
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63 return savedDvObject;
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64 }
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65
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66 /**
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67 * @todo DRY! Perhaps we should merge this with the older
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68 * updateContentIndexTime method.
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69 */
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70 public DvObject updatePermissionIndexTime(DvObject dvObject) {
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71 /**
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72 * @todo to avoid a possible OptimisticLockException, should we merge
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73 * dvObject before we try to set this timestamp? See
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74 * https://github.com/IQSS/dataverse/commit/6ad0ebb272c8cb46368cb76784b55dbf33eea947
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75 */
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76 DvObject dvObjectToModify = findDvObject(dvObject.getId());
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77 dvObjectToModify.setPermissionIndexTime(new Timestamp(new Date().getTime()));
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78 DvObject savedDvObject = em.merge(dvObjectToModify);
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79 return savedDvObject;
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80 }
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81
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82 @TransactionAttribute(REQUIRES_NEW)
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83 public int clearAllIndexTimes() {
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84 Query clearIndexTimes = em.createQuery("UPDATE DvObject o SET o.indexTime = NULL, o.permissionIndexTime = NULL");
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85 int numRowsUpdated = clearIndexTimes.executeUpdate();
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86 return numRowsUpdated;
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87 }
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88
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89 }