Mercurial > hg > IndexMetaContextualizer

annotate src/main/java/de/mpiwg/indexmeta/services/PersistentService.java @ 7:bc57f2660b0f

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implementation of web service
author Jorge Urzua <jurzua@mpiwg-berlin.mpg.de>
date Fri, 12 Apr 2013 17:48:42 +0200
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1 package de.mpiwg.indexmeta.services;
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2
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3 import java.util.List;
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5 import javax.persistence.Query;
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7 import de.mpiwg.indexmeta.bo.Contextualization;
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8 import de.mpiwg.indexmeta.utils.QuadMap;
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10 public class PersistentService {
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12 private QuadMap<Contextualization> ctxMap = null;
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13 private javax.persistence.EntityManagerFactory emf;
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14 private javax.persistence.EntityManager em;
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15 private String PERSISTENCE_UNIT_NAME = "uno";
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18 public QuadMap<Contextualization> getCtxMap() {
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19 if(ctxMap == null){
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20 this.loadCtxMap();
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21 }
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22 return ctxMap;
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23 }
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25 public void saveCtx(Contextualization ctx){
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26 System.out.println("Saving= " + ctx.toString());
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28 initEntityManager();
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29 em.getTransaction().begin();
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31 em.persist(ctx);
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32 ctxMap.put(ctx.getKey(), ctx);
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34 em.getTransaction().commit();
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35 closeEntityManager();
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37 System.out.println("Saved= " + ctx.toString());
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38 }
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41 private void loadCtxMap(){
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42 ctxMap = new QuadMap<Contextualization>();
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44 initEntityManager();
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45 em.getTransaction().begin();
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46
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47 Query q = em.createQuery("from Contextualization");
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48 List<Contextualization> list = q.getResultList();
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49
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50 for(Contextualization ctx : list){
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51 ctxMap.put(ctx.getKey(), ctx);
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52 }
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54 em.getTransaction().commit();
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55 closeEntityManager();
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56 }
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59 private void initEntityManager() {
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60 emf = javax.persistence.Persistence.createEntityManagerFactory(PERSISTENCE_UNIT_NAME);
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61 em = emf.createEntityManager();
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62 }
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64 private void closeEntityManager() {
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65 em.close();
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66 emf.close();
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67 }
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71 }