Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/artifacts/model/GaugeFinderFactory.java @ 8755:30b1ddadf275
(issue1801) Unify reference gauge finding code
The basic way as described in the method comment of the
determineRefGauge method is now used in the WINFOArtifact,
MainValuesService and RiverUtils.getGauge method.
RiverUtils.getGauge previously just returned the first
gauge found. While this is now a behavior change I believe
that it is always more correct then the undeterministic
behavior of the previous implmenentation.
author | Andre Heinecke <andre.heinecke@intevation.de> |
---|---|
date | Wed, 24 Jun 2015 14:07:26 +0200 |
parents | af13ceeba52a |
children | 0a5239a1e46e |
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/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde * Software engineering by Intevation GmbH * * This file is Free Software under the GNU AGPL (>=v3) * and comes with ABSOLUTELY NO WARRANTY! Check out the * documentation coming with Dive4Elements River for details. */ package org.dive4elements.river.artifacts.model; import org.dive4elements.river.artifacts.cache.CacheFactory; import org.dive4elements.river.backend.SessionHolder; import org.dive4elements.river.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; /** Get GaugeFinders. */ 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 :