Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/CrossSectionFactory.java @ 1965:e71615d95afb
Added method to CrossSectionFactory to get single CrossSection, employ cache.
flys-artifacts/trunk@3376 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
|---|---|
| date | Fri, 09 Dec 2011 15:52:22 +0000 |
| parents | 59622ba800c8 |
| children | f7e2a84a6d88 |
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| 1964:85e442933e6d | 1965:e71615d95afb |
|---|---|
| 1 package de.intevation.flys.artifacts.model; | 1 package de.intevation.flys.artifacts.model; |
| 2 | 2 |
| 3 import java.util.List; | 3 import java.util.List; |
| 4 | |
| 5 import net.sf.ehcache.Cache; | |
| 6 import net.sf.ehcache.Element; | |
| 4 | 7 |
| 5 import de.intevation.flys.backend.SessionHolder; | 8 import de.intevation.flys.backend.SessionHolder; |
| 6 import de.intevation.flys.model.CrossSection; | 9 import de.intevation.flys.model.CrossSection; |
| 7 import de.intevation.flys.model.River; | 10 import de.intevation.flys.model.River; |
| 8 | 11 |
| 12 import de.intevation.flys.artifacts.cache.CacheFactory; | |
| 13 | |
| 9 import org.hibernate.Session; | 14 import org.hibernate.Session; |
| 10 import org.hibernate.Query; | 15 import org.hibernate.Query; |
| 16 | |
| 11 | 17 |
| 12 /** | 18 /** |
| 13 * Get Cross Sections. | 19 * Get Cross Sections. |
| 14 */ | 20 */ |
| 15 public class CrossSectionFactory { | 21 public class CrossSectionFactory { |
| 16 | 22 |
| 23 protected final static String CACHE_NAME = "cross_sections"; | |
| 24 | |
| 25 // TODO use caching consistently, streamline acces. | |
| 17 /** | 26 /** |
| 18 * Get CrossSections for an instantiated River. | 27 * Get CrossSections for an instantiated River. |
| 19 * | 28 * |
| 20 * @param river river object. | 29 * @param river river object. |
| 21 * | 30 * |
| 38 Query query = session.createQuery( | 47 Query query = session.createQuery( |
| 39 "from CrossSection where river.name = :rivername"); | 48 "from CrossSection where river.name = :rivername"); |
| 40 query.setParameter("rivername", riverName); | 49 query.setParameter("rivername", riverName); |
| 41 return query.list(); | 50 return query.list(); |
| 42 } | 51 } |
| 52 | |
| 53 | |
| 54 /** Get a specific CrossSection from db. */ | |
| 55 public static CrossSection getCrossSection(int id) { | |
| 56 Cache cache = CacheFactory.getCache(CACHE_NAME); | |
| 57 if (cache != null) { | |
| 58 Element element = cache.get(Integer.valueOf(id)); | |
| 59 if (element != null) { | |
| 60 return (CrossSection) element.getValue(); | |
| 61 } | |
| 62 } | |
| 63 | |
| 64 CrossSection section = getCrossSectionUncached(id); | |
| 65 if (cache != null) { | |
| 66 Element element = new Element(Integer.valueOf(id), section); | |
| 67 cache.put(element); | |
| 68 } | |
| 69 | |
| 70 return section; | |
| 71 } | |
| 72 | |
| 73 | |
| 74 /** Get specific CrossSection from database. */ | |
| 75 protected static CrossSection getCrossSectionUncached(int id) { | |
| 76 Session session = SessionHolder.HOLDER.get(); | |
| 77 Query query = session.createQuery( | |
| 78 "from CrossSection where id=:id"); | |
| 79 query.setParameter("id", id); | |
| 80 List<CrossSection> list = query.list(); | |
| 81 return list.isEmpty() ? null : list.get(0); | |
| 82 } | |
| 43 } | 83 } |
| 44 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : | 84 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |