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;
sascha@2561: 
teichmann@5831: import org.dive4elements.river.artifacts.cache.CacheFactory;
sascha@2561: 
teichmann@5831: import org.dive4elements.river.backend.SessionHolder;
sascha@2561: 
sascha@2561: import net.sf.ehcache.Cache;
sascha@2561: import net.sf.ehcache.Element;
sascha@2561: 
sascha@2561: import org.apache.log4j.Logger;
sascha@2561: 
sascha@2561: import org.hibernate.Session;
sascha@2561: 
sascha@2561: public class FixingsOverviewFactory
sascha@2561: {
sascha@2561:     private static Logger log = Logger.getLogger(FixingsOverviewFactory.class);
sascha@2561: 
sascha@2561:     public static final String CACHE_NAME = "fixings-overviews";
sascha@2561: 
sascha@2561:     private FixingsOverviewFactory() {
sascha@2561:     }
sascha@2561: 
sascha@2561: 
sascha@2561:     public static FixingsOverview getOverview(String river) {
sascha@2561: 
sascha@2622:         boolean debug = log.isDebugEnabled();
sascha@2622: 
sascha@2622:         if (debug) {
sascha@2622:             log.debug(
sascha@2622:                 "Looking for fixings overview for river '" + river + "'");
sascha@2622:         }
sascha@2561: 
sascha@2561:         Cache cache = CacheFactory.getCache(CACHE_NAME);
sascha@2561: 
sascha@2561:         if (cache == null) {
sascha@2622:             if (debug) {
sascha@2622:                 log.debug("Cache not configured.");
sascha@2622:             }
sascha@2561:             return getUncached(river);
sascha@2561:         }
sascha@2561: 
sascha@2561:         String key = "fix-over-" + river;
sascha@2561: 
sascha@2561:         Element element = cache.get(key);
sascha@2561: 
sascha@2561:         if (element != null) {
sascha@2622:             if (debug) {
sascha@2622:                 log.debug("Overview found in cache");
sascha@2622:             }
sascha@2561:             return (FixingsOverview)element.getValue();
sascha@2561:         }
sascha@2561: 
sascha@2561:         FixingsOverview overview = getUncached(river);
sascha@2561: 
sascha@2561:         if (overview != null) {
sascha@2622:             if (debug) {
sascha@2622:                 log.debug("Store overview in cache.");
sascha@2622:             }
sascha@2622:             cache.put(new Element(key, overview));
sascha@2561:         }
sascha@2561: 
sascha@2561:         return overview;
sascha@2561:     }
sascha@2561: 
sascha@2561:     public static FixingsOverview getUncached(String river) {
sascha@2561:         FixingsOverview overview = new FixingsOverview(river);
sascha@2561: 
sascha@2561:         Session session = SessionHolder.HOLDER.get();
sascha@2561: 
sascha@2561:         return overview.load(session) ? overview : null;
sascha@2561:     }
sascha@2561: }
sascha@2561: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :