view flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/minfo/BedOverviewFactory.java @ 4255:670e98f5a441

Fixed leak while merging facets. The ThemeList that is used by OutputHelper to sort the Facets for an Output now uses a list to store the ManagedFacets. The correct order is made up by sorting the List using Collections.sort() function of the Java JDK. Therfore, the ManagedFacet class implements the Comparable interface. The return value of its compareTo(other) method depends on the value of the 'position' field.
author Ingo Weinzierl <weinzierl.ingo@googlemail.com>
date Thu, 25 Oct 2012 14:01:46 +0200
parents ae598cf50682
children
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package de.intevation.flys.artifacts.model.minfo;

import net.sf.ehcache.Cache;
import net.sf.ehcache.Element;

import org.apache.log4j.Logger;
import org.hibernate.Session;

import de.intevation.flys.artifacts.cache.CacheFactory;
import de.intevation.flys.backend.SedDBSessionHolder;

public class BedOverviewFactory {

    private static Logger log = Logger.getLogger(BedOverviewFactory.class);

    public static final String CACHE_NAME = "sq-overviews";

    private BedOverviewFactory() {
    }


    public static BedOverview getOverview(String river) {

        boolean debug = log.isDebugEnabled();

        if (debug) {
            log.debug(
                "Looking for bed 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 = "bed-over-" + river;

        Element element = cache.get(key);

        if (element != null) {
            if (debug) {
                log.debug("Overview found in cache");
            }
            return (BedOverview)element.getValue();
        }

        BedOverview overview = getUncached(river);

        if (overview != null) {
            if (debug) {
                log.debug("Store overview in cache.");
            }
            cache.put(new Element(key, overview));
        }

        return overview;
    }

    public static BedOverview getUncached(String river) {
        BedOverview overview = new BedOverview(river);

        Session session = SedDBSessionHolder.HOLDER.get();

        return overview.load(session) ? overview : null;
    }
}

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