Mercurial > dive4elements > river
comparison flys-backend/src/main/java/de/intevation/flys/importer/ImporterSession.java @ 497:67fd63e4ef66
Importer: centralized caching
flys-backend/trunk@1851 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Sun, 08 May 2011 15:29:45 +0000 |
| parents | |
| children | 8ab04de0b879 |
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| 496:4f2d8980415f | 497:67fd63e4ef66 |
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| 1 package de.intevation.flys.importer; | |
| 2 | |
| 3 import java.util.Iterator; | |
| 4 import java.util.Map; | |
| 5 import java.util.HashMap; | |
| 6 | |
| 7 import java.math.BigDecimal; | |
| 8 | |
| 9 import org.hibernate.SessionFactory; | |
| 10 import org.hibernate.Session; | |
| 11 import org.hibernate.Query; | |
| 12 | |
| 13 import de.intevation.flys.backend.SessionFactoryProvider; | |
| 14 | |
| 15 import de.intevation.flys.model.WstColumnValue; | |
| 16 import de.intevation.flys.model.WstColumn; | |
| 17 | |
| 18 public class ImporterSession | |
| 19 { | |
| 20 private static final ThreadLocal<ImporterSession> SESSION = | |
| 21 new ThreadLocal<ImporterSession>() { | |
| 22 @Override | |
| 23 protected ImporterSession initialValue() { | |
| 24 return new ImporterSession(); | |
| 25 } | |
| 26 }; | |
| 27 | |
| 28 protected Session databaseSession; | |
| 29 | |
| 30 protected Map<WstColumnValueKey, WstColumnValue> wstColumnValues; | |
| 31 | |
| 32 public static ImporterSession getInstance() { | |
| 33 return SESSION.get(); | |
| 34 } | |
| 35 | |
| 36 public ImporterSession() { | |
| 37 SessionFactory sessionFactory = | |
| 38 SessionFactoryProvider.createSessionFactory(); | |
| 39 databaseSession = sessionFactory.openSession(); | |
| 40 } | |
| 41 | |
| 42 public Session getDatabaseSession() { | |
| 43 return databaseSession; | |
| 44 } | |
| 45 | |
| 46 public WstColumnValue getWstColumnValue( | |
| 47 WstColumn column, | |
| 48 BigDecimal position, | |
| 49 BigDecimal w | |
| 50 ) { | |
| 51 if (wstColumnValues == null) { | |
| 52 loadWstColumnValues(); | |
| 53 } | |
| 54 | |
| 55 WstColumnValueKey key = new WstColumnValueKey( | |
| 56 column.getId(), | |
| 57 position.doubleValue(), | |
| 58 w.doubleValue()); | |
| 59 | |
| 60 WstColumnValue wcv = wstColumnValues.get(key); | |
| 61 | |
| 62 if (wcv != null) { | |
| 63 return wcv; | |
| 64 } | |
| 65 | |
| 66 wcv = new WstColumnValue(column, position, w); | |
| 67 | |
| 68 databaseSession.save(wcv); | |
| 69 | |
| 70 wstColumnValues.put(key, wcv); | |
| 71 | |
| 72 return wcv; | |
| 73 } | |
| 74 | |
| 75 protected void loadWstColumnValues() { | |
| 76 wstColumnValues = new HashMap<WstColumnValueKey, WstColumnValue>(); | |
| 77 | |
| 78 Query query = databaseSession.createQuery("from WstColumnValue"); | |
| 79 | |
| 80 for (Iterator iter = query.iterate(); iter.hasNext();) { | |
| 81 WstColumnValue wcv = (WstColumnValue)iter.next(); | |
| 82 wstColumnValues.put(new WstColumnValueKey(wcv), wcv); | |
| 83 } | |
| 84 } | |
| 85 } | |
| 86 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |