Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/artifacts/cache/CacheFactory.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.
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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.cache;
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11 import org.dive4elements.artifacts.common.utils.Config;
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12
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13 import net.sf.ehcache.Cache;
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14 import net.sf.ehcache.CacheException;
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15 import net.sf.ehcache.CacheManager;
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16
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17 import org.apache.log4j.Logger;
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18
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19 public final class CacheFactory
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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 public static final String CACHE_CONFIG_FILE_PROPERTY =
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24 "flys.artifacts.cache.config.file";
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25
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26 public static final String XPATH_CACHE_CONFIG_FILE =
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27 "/artifact-database/cache/config-file/text()";
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28
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29 private CacheFactory() {
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30 }
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31
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32 private static boolean initialized;
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33
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34 private static CacheManager cacheManager;
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35
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36 public static final Cache getCache() {
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37 return getCache(Cache.DEFAULT_CACHE_NAME);
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38 }
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39
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40 public static final String getConfigFile() {
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41 String configFile = System.getProperty(CACHE_CONFIG_FILE_PROPERTY);
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42
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43 if (configFile != null) {
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44 return configFile;
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45 }
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46
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47 configFile = Config.getStringXPath(XPATH_CACHE_CONFIG_FILE);
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48
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49 if (configFile != null) {
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50 configFile = Config.replaceConfigDir(configFile);
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51 }
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52
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53 return configFile;
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54 }
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55
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56 public static final synchronized Cache getCache(String cacheName) {
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57 if (!initialized) {
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58 initialized = true; // try only once
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59 String configFile = getConfigFile();
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60 if (configFile != null) {
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61 try {
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62 cacheManager = CacheManager.create(configFile);
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63 //System.setProperty(
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64 // "net.sf.ehcache.enableShutdownHook", "true");
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65 Runtime.getRuntime().addShutdownHook(new Thread() {
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66 public void run() {
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67 log.info("shutting down caches");
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68 for (String name: cacheManager.getCacheNames()) {
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69 log.info("\tflushing '" + name + "'");
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70 cacheManager.getCache(name).flush();
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71 }
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72 cacheManager.shutdown();
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73 }
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74 });
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75 }
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76 catch (CacheException ce) {
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77 log.error("cannot configure cache", ce);
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78 }
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79 }
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80 }
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81
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82 return cacheManager != null
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83 ? cacheManager.getCache(cacheName)
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84 : null;
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85 }
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86 }
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87 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org