Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/minfo/BedOverviewFactory.java @ 8781:9530a00056dd

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It's worth a warning.
author Tom Gottfried <tom@intevation.de>
date Tue, 08 Dec 2015 15:56:12 +0100
parents af13ceeba52a
children 0a5239a1e46e
rev   line source
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4897a58c8746 River artifacts: Added new copyright headers.
Sascha L. Teichmann <teichmann@intevation.de>
parents: 5838
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.artifacts.model.minfo;
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10
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11 import net.sf.ehcache.Cache;
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12 import net.sf.ehcache.Element;
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13
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14 import org.apache.log4j.Logger;
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15 import org.hibernate.Session;
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16
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17 import org.dive4elements.river.artifacts.cache.CacheFactory;
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18 import org.dive4elements.river.backend.SedDBSessionHolder;
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19
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20 public class BedOverviewFactory {
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21
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22 private static Logger log = Logger.getLogger(BedOverviewFactory.class);
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23
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24 public static final String CACHE_NAME = "sq-overviews";
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25
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26 private BedOverviewFactory() {
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27 }
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28
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29
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30 public static BedOverview getOverview(String river) {
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31
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32 boolean debug = log.isDebugEnabled();
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33
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34 if (debug) {
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35 log.debug(
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36 "Looking for bed overview for river '" + river + "'");
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37 }
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38
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39 Cache cache = CacheFactory.getCache(CACHE_NAME);
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40
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41 if (cache == null) {
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42 log.warn("Cache not configured.");
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43 return getUncached(river);
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44 }
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45
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46 String key = "bed-over-" + river;
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47
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48 Element element = cache.get(key);
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49
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50 if (element != null) {
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51 if (debug) {
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52 log.debug("Overview found in cache");
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53 }
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54 return (BedOverview)element.getValue();
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55 }
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56
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57 BedOverview overview = getUncached(river);
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58
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59 if (overview != null) {
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60 if (debug) {
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61 log.debug("Store overview in cache.");
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62 }
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63 cache.put(new Element(key, overview));
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64 }
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65
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66 return overview;
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67 }
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68
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69 public static BedOverview getUncached(String river) {
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70 BedOverview overview = new BedOverview(river);
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71
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72 Session session = SedDBSessionHolder.HOLDER.get();
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73
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74 return overview.load(session) ? overview : null;
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75 }
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76 }
http://dive4elements.wald.intevation.org