teichmann@5831: package org.dive4elements.river.artifacts.model;
raimund@3274: 
teichmann@5831: import org.dive4elements.river.artifacts.cache.CacheFactory;
raimund@3274: 
teichmann@5831: import org.dive4elements.river.backend.SedDBSessionHolder;
raimund@3274: 
raimund@3274: import net.sf.ehcache.Cache;
raimund@3274: import net.sf.ehcache.Element;
raimund@3274: 
raimund@3274: import org.apache.log4j.Logger;
raimund@3274: 
raimund@3274: import org.hibernate.Session;
raimund@3274: 
raimund@3274: public class SQOverviewFactory {
sascha@3289: 
sascha@3289:     private static Logger log = Logger.getLogger(SQOverviewFactory.class);
raimund@3274: 
raimund@3274:     public static final String CACHE_NAME = "sq-overviews";
raimund@3274: 
raimund@3274:     private SQOverviewFactory() {
raimund@3274:     }
raimund@3274: 
raimund@3274: 
raimund@3274:     public static SQOverview getOverview(String river) {
raimund@3274: 
raimund@3274:         boolean debug = log.isDebugEnabled();
raimund@3274: 
raimund@3274:         if (debug) {
raimund@3274:             log.debug(
raimund@3274:                 "Looking for sq overview for river '" + river + "'");
raimund@3274:         }
raimund@3274: 
raimund@3274:         Cache cache = CacheFactory.getCache(CACHE_NAME);
raimund@3274: 
raimund@3274:         if (cache == null) {
raimund@3274:             if (debug) {
raimund@3274:                 log.debug("Cache not configured.");
raimund@3274:             }
raimund@3274:             return getUncached(river);
raimund@3274:         }
raimund@3274: 
raimund@3274:         String key = "sq-over-" + river;
raimund@3274: 
raimund@3274:         Element element = cache.get(key);
raimund@3274: 
raimund@3274:         if (element != null) {
raimund@3274:             if (debug) {
raimund@3274:                 log.debug("Overview found in cache");
raimund@3274:             }
raimund@3274:             return (SQOverview)element.getValue();
raimund@3274:         }
raimund@3274: 
raimund@3274:         SQOverview overview = getUncached(river);
raimund@3274: 
raimund@3274:         if (overview != null) {
raimund@3274:             if (debug) {
raimund@3274:                 log.debug("Store overview in cache.");
raimund@3274:             }
raimund@3274:             cache.put(new Element(key, overview));
raimund@3274:         }
raimund@3274: 
raimund@3274:         return overview;
raimund@3274:     }
raimund@3274: 
raimund@3274:     public static SQOverview getUncached(String river) {
raimund@3274:         SQOverview overview = new SQOverview(river);
raimund@3274: 
raimund@3274:         Session session = SedDBSessionHolder.HOLDER.get();
raimund@3274: 
raimund@3274:         return overview.load(session) ? overview : null;
raimund@3274:     }
raimund@3274: }
sascha@3287: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :