Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/cache/CacheFactory.java @ 1115:f953c9a559d8

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Added license file and license headers. gnv-artifacts/trunk@1260 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 02 Nov 2010 17:46:55 +0000
parents cf421645a2d3
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f953c9a559d8 Added license file and license headers.
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1 /*
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2 * Copyright (c) 2010 by Intevation GmbH
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3 *
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4 * This program is free software under the LGPL (>=v2.1)
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5 * Read the file LGPL.txt coming with the software for details
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6 * or visit http://www.gnu.org/licenses/ if it does not exist.
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7 */
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8
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9 package de.intevation.gnv.artifacts.cache;
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10
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11 import java.lang.management.ManagementFactory;
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12
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13 import javax.management.MBeanServer;
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14
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15 import net.sf.ehcache.Cache;
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16 import net.sf.ehcache.CacheManager;
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17
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18 import net.sf.ehcache.management.ManagementService;
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19
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20 import org.apache.log4j.Logger;
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21
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22 import de.intevation.gnv.geobackend.base.query.cache.CacheCleaner;
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23 import de.intevation.gnv.state.cache.ThematicDataCacheCleaner;
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24
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25 /**
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26 * The <code>CacheFactory</code> is used to initialize and retrieve Cache.
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27 *
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28 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
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29 */
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30 public class CacheFactory {
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31
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32 /**
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33 * the logger, used to log exceptions and additonaly information
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34 */
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35 private static Logger log = Logger.getLogger(CacheFactory.class);
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36
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37 private final static String CACHENAME = "artifactdata";
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38
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39 /**
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40 * The singleton Instance of this Factory.
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41 */
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42 private static CacheFactory instance = null;
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43
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44 /**
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45 * The manager of the Cache
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46 */
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47 private CacheManager cacheManager = null;
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48
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49 /**
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50 * The Cleaner of the Cache
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51 */
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52 private CacheCleaner cacheCleaner = null;
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53
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54 /**
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55 * Basic-Constructor of this Class
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56 */
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57 private CacheFactory() {
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58 super();
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59 }
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60
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61 /**
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62 * This Method provides an singleton Instance of this Class.
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63 *
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64 * @return an singleton Instance of this Class
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65 */
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66 public static CacheFactory getInstance() {
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67 if (instance == null) {
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68 instance = new CacheFactory();
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69 }
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70 return instance;
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71 }
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72
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73 /**
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74 * Getting the ConnectionPool
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75 *
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76 * @return the ConnectionPool
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77 */
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78 public Cache getCache() {
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79 return this.cacheManager.getCache(CACHENAME);
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80 }
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81
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82 /**
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83 * Initializes the ConnectionPool. Should only be called once on system
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84 * startup
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85 *
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86 * @param configurationFileName
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87 */
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88 public void initializeCache(String configurationFileName) {
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89 if (cacheManager == null) {
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90 cacheManager = new CacheManager(configurationFileName);
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91 cacheManager.addCache(CACHENAME);
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92
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93 MBeanServer beanServer = ManagementFactory.getPlatformMBeanServer();
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94 ManagementService.registerMBeans(
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95 cacheManager, beanServer, false, false, false, true);
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96
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97 this.cacheCleaner = new ThematicDataCacheCleaner();
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98 this.cacheCleaner.start();
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99 }
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100 }
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101
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102 /**
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103 * Checks if the ConnectionPool has already been initialized.
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104 *
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105 * @return true if the ConnectionPool is initialized.
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106 */
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107 public boolean isInitialized() {
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108 return this.cacheManager != null;
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109 }
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110
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111 }
http://dive4elements.wald.intevation.org