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annotate gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/cache/CacheFactory.java @ 845:797a6264b89b

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Integrated the CacheCleaner for the ThematicDataCache gnv-artifacts/trunk@961 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Tim Englich <tim.englich@intevation.de>
date Tue, 20 Apr 2010 18:38:22 +0000
parents feae2f9d6c6f
children cf421645a2d3
rev   line source
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1 package de.intevation.gnv.artifacts.cache;
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2
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3 import net.sf.ehcache.Cache;
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4 import net.sf.ehcache.CacheManager;
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5
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6 import org.apache.log4j.Logger;
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7
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8 import de.intevation.gnv.geobackend.base.query.cache.CacheCleaner;
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9 import de.intevation.gnv.state.cache.ThematicDataCacheCleaner;
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10
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11 /**
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12 * The <code>CacheFactory</code> is used to initialize and retrieve Cache.
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13 *
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14 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
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15 */
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16 public class CacheFactory {
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17
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18 /**
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19 * the logger, used to log exceptions and additonaly information
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20 */
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21 private static Logger log = Logger.getLogger(CacheFactory.class);
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22
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23 private final static String CACHENAME = "artifactdata";
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24
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25 /**
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26 * The singleton Instance of this Factory.
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27 */
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28 private static CacheFactory instance = null;
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29
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30 /**
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31 * The manager of the Cache
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32 */
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33 private CacheManager cacheManager = null;
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34
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35 /**
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36 * The Cleaner of the Cache
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37 */
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38 private CacheCleaner cacheCleaner = null;
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39
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40 /**
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41 * Basic-Constructor of this Class
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42 */
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43 private CacheFactory() {
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44 super();
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45 }
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46
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47 /**
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48 * This Method provides an singleton Instance of this Class.
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49 *
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50 * @return an singleton Instance of this Class
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51 */
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52 public static CacheFactory getInstance() {
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53 if (instance == null) {
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54 instance = new CacheFactory();
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55 }
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56 return instance;
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57 }
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58
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59 /**
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60 * Getting the ConnectionPool
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61 *
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62 * @return the ConnectionPool
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63 */
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64 public Cache getCache() {
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65 return this.cacheManager.getCache(CACHENAME);
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66 }
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67
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68 /**
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69 * Initializes the ConnectionPool. Should only be called once on system
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70 * startup
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71 *
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72 * @param configurationFileName
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73 */
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74 public void initializeCache(String configurationFileName) {
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75 if (cacheManager == null) {
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76 cacheManager = new CacheManager(configurationFileName);
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77 cacheManager.addCache(CACHENAME);
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78 this.cacheCleaner = new ThematicDataCacheCleaner();
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79 this.cacheCleaner.start();
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80 }
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81 }
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83 /**
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84 * Checks if the ConnectionPool has already been initialized.
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85 *
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86 * @return true if the ConnectionPool is initialized.
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87 */
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88 public boolean isInitialized() {
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89 return this.cacheManager != null;
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90 }
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92 }
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