Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/GaugeFinderFactory.java @ 3611:a74bdd032cf7
FixA: Changed sector average form point to line in delta W(t) chart.
flys-artifacts/trunk@5240 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Raimund Renkert <raimund.renkert@intevation.de> |
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date | Thu, 23 Aug 2012 09:09:51 +0000 |
parents | c44ff50f4970 |
children | 61f4d4164a30 |
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package de.intevation.flys.artifacts.model; import de.intevation.flys.artifacts.cache.CacheFactory; import de.intevation.flys.backend.SessionHolder; import de.intevation.flys.model.River; import java.util.ArrayList; import java.util.List; import net.sf.ehcache.Cache; import net.sf.ehcache.Element; import org.apache.log4j.Logger; import org.hibernate.SQLQuery; import org.hibernate.Session; import org.hibernate.type.StandardBasicTypes; public class GaugeFinderFactory { private static Logger log = Logger.getLogger(GaugeFinderFactory.class); public static final String CACHE_NAME = "gauge-finders"; public static final String SQL_GAUGES = "SELECT" + " g.id AS gauge_id," + " g.name AS name," + " r.a AS a," + " r.b AS b " + "FROM gauges g" + " JOIN ranges r ON g.range_id = r.id " + "WHERE" + " g.river_id = :river_id " + "ORDER BY r.a"; private static GaugeFinderFactory INSTANCE; protected GaugeFinderFactory() { } public static synchronized GaugeFinderFactory getInstance() { if (INSTANCE == null) { INSTANCE = new GaugeFinderFactory(); } return INSTANCE; } public GaugeFinder getGaugeFinder(String riverName) { River river = RiverFactory.getRiver(riverName); return river != null ? getGaugeFinder(river.getId(), river.getKmUp()) : null; } public synchronized GaugeFinder getGaugeFinder( int riverId, boolean isKmUp ) { Cache cache = CacheFactory.getCache(CACHE_NAME); if (cache == null) { return getUncached(riverId, isKmUp); } String cacheKey = riverId + "-" + isKmUp; Element element = cache.get(cacheKey); if (element != null) { return (GaugeFinder)element.getValue(); } GaugeFinder finder = getUncached(riverId, isKmUp); if (finder != null) { cache.put(new Element(cacheKey, finder)); } return finder; } protected GaugeFinder loadGauges( Session session, int riverId, boolean isKmUp ) { SQLQuery query = session.createSQLQuery(SQL_GAUGES) .addScalar("gauge_id", StandardBasicTypes.INTEGER) .addScalar("name", StandardBasicTypes.STRING) .addScalar("a", StandardBasicTypes.DOUBLE) .addScalar("b", StandardBasicTypes.DOUBLE); query.setInteger("river_id", riverId); List<Object []> list = query.list(); if (list.isEmpty()) { log.warn("River " + riverId + " has no gauges."); return null; } List<GaugeRange> gauges = new ArrayList<GaugeRange>(); for (Object [] row: list) { int gaugeId = (Integer)row[0]; String name = (String) row[1]; double start = (Double) row[2]; double end = (Double) row[3]; GaugeRange gauge = new GaugeRange(start, end, name, gaugeId); gauges.add(gauge); } return new GaugeFinder(gauges, isKmUp); } protected GaugeFinder getUncached(int riverId, boolean isKmUp) { Session session = SessionHolder.HOLDER.get(); GaugeFinder finder = loadGauges(session, riverId, isKmUp); if (finder == null || !finder.loadDischargeSectors(session, riverId)) { return null; } return finder; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :