Merged revisions 5501-5502,5504-5508,5511-5513,5516-5519 via svnmerge from file:///home/clients/bsh/bsh-generischer-viewer/Material/SVN/flys-artifacts/trunk ........ r5501 | felix | 2012-09-18 11:49:45 +0200 (Di, 18 Sep 2012) | 1 line fix issue865 - missing showarea theme prop. ........ r5502 | clins | 2012-09-18 12:18:30 +0200 (Di, 18 Sep 2012) | 1 line Add robustness checks to prevent NPEs ........ r5504 | felix | 2012-09-18 14:03:15 +0200 (Di, 18 Sep 2012) | 1 line i18n for area label (fix issue487). ........ r5505 | clins | 2012-09-18 16:19:59 +0200 (Di, 18 Sep 2012) | 1 line Update themes to show point descriptions ........ r5506 | rrenkert | 2012-09-18 17:00:30 +0200 (Di, 18 Sep 2012) | 3 lines Removed incorrect characteristic diameter. ........ r5507 | rrenkert | 2012-09-18 17:03:20 +0200 (Di, 18 Sep 2012) | 3 lines Fixed some stupid bugs in bed quality data factory and calculation. ........ r5508 | teichmann | 2012-09-18 17:45:49 +0200 (Di, 18 Sep 2012) | 1 line The usual whitespace and import cleanups. ........ r5511 | teichmann | 2012-09-18 18:24:51 +0200 (Di, 18 Sep 2012) | 1 line Use generics aware Collections.emptyList(). ........ r5512 | teichmann | 2012-09-18 20:36:52 +0200 (Di, 18 Sep 2012) | 1 line Some more little steps towards "Auslagerung extremer Wasserspiegellagen". ........ r5513 | clins | 2012-09-18 23:38:19 +0200 (Di, 18 Sep 2012) | 1 line A and B facets of fix analyis are now deactivated by default ........ r5516 | bricks | 2012-09-19 10:45:51 +0200 (Mi, 19 Sep 2012) | 2 lines Add the gauge station to the GaugeOverviewInfoService xml response ........ r5517 | rrenkert | 2012-09-19 10:50:23 +0200 (Mi, 19 Sep 2012) | 3 lines Added CSV export to bed quality calculation. ........ r5518 | bricks | 2012-09-19 11:04:04 +0200 (Mi, 19 Sep 2012) | 2 lines Fix date in changelog entry ........ r5519 | teichmann | 2012-09-19 11:17:14 +0200 (Mi, 19 Sep 2012) | 1 line Removed trailing whitespace. ........ flys-artifacts/tags/2.9.1@5531 c6561f87-3c4e-4783-a992-168aeb5c3f6f

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;
    }
}
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