Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/cache/CacheFactory.java @ 1065:cf421645a2d3
Made cache statistics available as MBeans (eg in JConsole).
gnv-artifacts/trunk@1157 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Fri, 04 Jun 2010 08:47:52 +0000 |
parents | 797a6264b89b |
children | f953c9a559d8 |
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1 package de.intevation.gnv.artifacts.cache; |
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2 |
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3 import java.lang.management.ManagementFactory; |
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4 |
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5 import javax.management.MBeanServer; |
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6 |
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7 import net.sf.ehcache.Cache; |
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8 import net.sf.ehcache.CacheManager; |
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9 |
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10 import net.sf.ehcache.management.ManagementService; |
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11 |
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12 import org.apache.log4j.Logger; |
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13 |
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14 import de.intevation.gnv.geobackend.base.query.cache.CacheCleaner; |
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15 import de.intevation.gnv.state.cache.ThematicDataCacheCleaner; |
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16 |
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17 /** |
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18 * The <code>CacheFactory</code> is used to initialize and retrieve Cache. |
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19 * |
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20 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> |
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21 */ |
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22 public class CacheFactory { |
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23 |
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24 /** |
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25 * the logger, used to log exceptions and additonaly information |
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26 */ |
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27 private static Logger log = Logger.getLogger(CacheFactory.class); |
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28 |
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29 private final static String CACHENAME = "artifactdata"; |
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30 |
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31 /** |
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32 * The singleton Instance of this Factory. |
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33 */ |
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34 private static CacheFactory instance = null; |
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35 |
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36 /** |
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37 * The manager of the Cache |
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38 */ |
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39 private CacheManager cacheManager = null; |
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40 |
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41 /** |
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42 * The Cleaner of the Cache |
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43 */ |
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parents:
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44 private CacheCleaner cacheCleaner = null; |
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45 |
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46 /** |
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47 * Basic-Constructor of this Class |
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48 */ |
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49 private CacheFactory() { |
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50 super(); |
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51 } |
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52 |
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53 /** |
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54 * This Method provides an singleton Instance of this Class. |
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55 * |
99
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56 * @return an singleton Instance of this Class |
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57 */ |
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58 public static CacheFactory getInstance() { |
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59 if (instance == null) { |
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60 instance = new CacheFactory(); |
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61 } |
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62 return instance; |
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63 } |
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64 |
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65 /** |
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66 * Getting the ConnectionPool |
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67 * |
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68 * @return the ConnectionPool |
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69 */ |
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70 public Cache getCache() { |
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71 return this.cacheManager.getCache(CACHENAME); |
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72 } |
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73 |
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74 /** |
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75 * Initializes the ConnectionPool. Should only be called once on system |
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76 * startup |
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77 * |
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78 * @param configurationFileName |
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79 */ |
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80 public void initializeCache(String configurationFileName) { |
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81 if (cacheManager == null) { |
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82 cacheManager = new CacheManager(configurationFileName); |
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83 cacheManager.addCache(CACHENAME); |
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parents:
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84 |
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85 MBeanServer beanServer = ManagementFactory.getPlatformMBeanServer(); |
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86 ManagementService.registerMBeans( |
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87 cacheManager, beanServer, false, false, false, true); |
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88 |
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89 this.cacheCleaner = new ThematicDataCacheCleaner(); |
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90 this.cacheCleaner.start(); |
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91 } |
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92 } |
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93 |
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94 /** |
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95 * Checks if the ConnectionPool has already been initialized. |
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96 * |
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97 * @return true if the ConnectionPool is initialized. |
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98 */ |
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99 public boolean isInitialized() { |
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100 return this.cacheManager != null; |
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101 } |
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102 |
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103 } |