view flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/SQOverviewFactory.java @ 4655:cd44d28d0fbc

Move the access to artifact data to the Access object Use BedHeightAccess class to receive the data from the artifact. This abstracts the data access from the actual artifact.
author Björn Ricks <bjoern.ricks@intevation.de>
date Tue, 11 Dec 2012 09:44:04 +0100
parents ec9aab93f292
children
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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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