teichmann@5863: /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
teichmann@5863:  * Software engineering by Intevation GmbH
teichmann@5863:  *
teichmann@5863:  * This file is Free Software under the GNU AGPL (>=v3) 
teichmann@5863:  * and comes with ABSOLUTELY NO WARRANTY! Check out the
teichmann@5863:  * documentation coming with Dive4Elements River for details. 
teichmann@5863:  */
teichmann@5863: 
teichmann@5831: package org.dive4elements.river.artifacts.model.minfo;
raimund@3751: 
raimund@3751: import net.sf.ehcache.Cache;
raimund@3751: import net.sf.ehcache.Element;
raimund@3751: 
raimund@3751: import org.apache.log4j.Logger;
raimund@3751: import org.hibernate.Session;
raimund@3751: 
teichmann@5831: import org.dive4elements.river.artifacts.cache.CacheFactory;
teichmann@5831: import org.dive4elements.river.backend.SedDBSessionHolder;
raimund@3751: 
raimund@3751: public class BedloadOverviewFactory {
raimund@3751: 
raimund@3751:     private static Logger log = Logger.getLogger(BedloadOverviewFactory.class);
raimund@3751: 
raimund@3751:     public static final String CACHE_NAME = "sq-overviews";
raimund@3751: 
raimund@3751:     private BedloadOverviewFactory() {
raimund@3751:     }
raimund@3751: 
raimund@3751: 
raimund@3751:     public static BedloadOverview getOverview(String river) {
raimund@3751: 
raimund@3751:         boolean debug = log.isDebugEnabled();
raimund@3751: 
raimund@3751:         if (debug) {
raimund@3751:             log.debug(
raimund@3751:                 "Looking for bedload overview for river '" + river + "'");
raimund@3751:         }
raimund@3751: 
raimund@3751:         Cache cache = CacheFactory.getCache(CACHE_NAME);
raimund@3751: 
raimund@3751:         if (cache == null) {
raimund@3751:             if (debug) {
raimund@3751:                 log.debug("Cache not configured.");
raimund@3751:             }
raimund@3751:             return getUncached(river);
raimund@3751:         }
raimund@3751: 
raimund@3751:         String key = "bedload-over-" + river;
raimund@3751: 
raimund@3751:         Element element = cache.get(key);
raimund@3751: 
raimund@3751:         if (element != null) {
raimund@3751:             if (debug) {
raimund@3751:                 log.debug("Overview found in cache");
raimund@3751:             }
raimund@3751:             return (BedloadOverview)element.getValue();
raimund@3751:         }
raimund@3751: 
raimund@3751:         BedloadOverview overview = getUncached(river);
raimund@3751: 
raimund@3751:         if (overview != null) {
raimund@3751:             if (debug) {
raimund@3751:                 log.debug("Store overview in cache.");
raimund@3751:             }
raimund@3751:             cache.put(new Element(key, overview));
raimund@3751:         }
raimund@3751: 
raimund@3751:         return overview;
raimund@3751:     }
raimund@3751: 
raimund@3751:     public static BedloadOverview getUncached(String river) {
raimund@3751:         BedloadOverview overview = new BedloadOverview(river);
raimund@3751: 
raimund@3751:         Session session = SedDBSessionHolder.HOLDER.get();
raimund@3751: 
raimund@3751:         return overview.load(session) ? overview : null;
raimund@3751:     }
raimund@3751: }