Mercurial > dive4elements > river
diff flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/SQOverviewFactory.java @ 3274:43e42315ce22
Added service for an overview chart of measuring points in sq relation.
flys-artifacts/trunk@4918 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Raimund Renkert <raimund.renkert@intevation.de> |
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date | Tue, 10 Jul 2012 16:37:48 +0000 |
parents | |
children | 30f157c7e466 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/SQOverviewFactory.java Tue Jul 10 16:37:48 2012 +0000 @@ -0,0 +1,71 @@ +package de.intevation.flys.artifacts.model; + +import de.intevation.flys.artifacts.cache.CacheFactory; + +import de.intevation.flys.backend.SedDBSessionHolder; + +import net.sf.ehcache.Cache; +import net.sf.ehcache.Element; + +import org.apache.log4j.Logger; + +import org.hibernate.Session; + +public class SQOverviewFactory { + private static Logger log = Logger.getLogger(SQOverviewFactory.class); + + public static final String CACHE_NAME = "sq-overviews"; + + private SQOverviewFactory() { + } + + + public static SQOverview getOverview(String river) { + + boolean debug = log.isDebugEnabled(); + + if (debug) { + log.debug( + "Looking for sq overview for river '" + river + "'"); + } + + Cache cache = CacheFactory.getCache(CACHE_NAME); + + if (cache == null) { + if (debug) { + log.debug("Cache not configured."); + } + return getUncached(river); + } + + String key = "sq-over-" + river; + + Element element = cache.get(key); + + if (element != null) { + if (debug) { + log.debug("Overview found in cache"); + } + return (SQOverview)element.getValue(); + } + + SQOverview overview = getUncached(river); + + if (overview != null) { + if (debug) { + log.debug("Store overview in cache."); + } + cache.put(new Element(key, overview)); + } + + return overview; + } + + public static SQOverview getUncached(String river) { + SQOverview overview = new SQOverview(river); + + Session session = SedDBSessionHolder.HOLDER.get(); + + return overview.load(session) ? overview : null; + } +}