Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/model/SQOverviewFactory.java @ 5863:4897a58c8746

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River artifacts: Added new copyright headers.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:40:59 +0200
parents 5aa05a7a34b7
children af13ceeba52a
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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Sascha L. Teichmann <teichmann@intevation.de>
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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;
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10
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11 import org.dive4elements.river.artifacts.cache.CacheFactory;
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12
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13 import org.dive4elements.river.backend.SedDBSessionHolder;
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14
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15 import net.sf.ehcache.Cache;
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16 import net.sf.ehcache.Element;
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17
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18 import org.apache.log4j.Logger;
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19
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20 import org.hibernate.Session;
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21
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22 public class SQOverviewFactory {
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23
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24 private static Logger log = Logger.getLogger(SQOverviewFactory.class);
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25
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26 public static final String CACHE_NAME = "sq-overviews";
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27
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28 private SQOverviewFactory() {
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29 }
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30
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31
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32 public static SQOverview getOverview(String river) {
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33
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34 boolean debug = log.isDebugEnabled();
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35
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36 if (debug) {
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37 log.debug(
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38 "Looking for sq overview for river '" + river + "'");
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39 }
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40
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41 Cache cache = CacheFactory.getCache(CACHE_NAME);
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42
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43 if (cache == null) {
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44 if (debug) {
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45 log.debug("Cache not configured.");
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46 }
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47 return getUncached(river);
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48 }
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49
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50 String key = "sq-over-" + river;
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51
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52 Element element = cache.get(key);
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53
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54 if (element != null) {
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55 if (debug) {
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56 log.debug("Overview found in cache");
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57 }
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58 return (SQOverview)element.getValue();
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59 }
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60
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61 SQOverview overview = getUncached(river);
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62
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63 if (overview != null) {
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64 if (debug) {
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65 log.debug("Store overview in cache.");
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66 }
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67 cache.put(new Element(key, overview));
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68 }
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69
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70 return overview;
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71 }
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72
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73 public static SQOverview getUncached(String river) {
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74 SQOverview overview = new SQOverview(river);
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75
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76 Session session = SedDBSessionHolder.HOLDER.get();
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77
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78 return overview.load(session) ? overview : null;
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79 }
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80 }
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81 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org