tim@99: package de.intevation.gnv.artifacts.cache;
tim@99: 
ingo@1065: import java.lang.management.ManagementFactory;
ingo@1065: 
ingo@1065: import javax.management.MBeanServer;
ingo@1065: 
tim@99: import net.sf.ehcache.Cache;
tim@99: import net.sf.ehcache.CacheManager;
tim@99: 
ingo@1065: import net.sf.ehcache.management.ManagementService;
ingo@1065: 
tim@99: import org.apache.log4j.Logger;
tim@99: 
tim@845: import de.intevation.gnv.geobackend.base.query.cache.CacheCleaner;
tim@845: import de.intevation.gnv.state.cache.ThematicDataCacheCleaner;
tim@845: 
tim@99: /**
ingo@790:  * The <code>CacheFactory</code> is used to initialize and retrieve Cache.
sascha@803:  *
sascha@780:  * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
tim@99:  */
tim@99: public class CacheFactory {
tim@99: 
tim@99:     /**
tim@99:      * the logger, used to log exceptions and additonaly information
tim@99:      */
tim@99:     private static Logger log = Logger.getLogger(CacheFactory.class);
tim@171: 
tim@99:     private final static String CACHENAME = "artifactdata";
tim@99: 
tim@99:     /**
tim@99:      * The singleton Instance of this Factory.
tim@99:      */
tim@99:     private static CacheFactory instance = null;
tim@99: 
tim@99:     /**
tim@845:      * The manager of the Cache
tim@99:      */
tim@99:     private CacheManager cacheManager = null;
tim@99: 
tim@99:     /**
tim@845:      * The Cleaner of the Cache
tim@845:      */
tim@845:     private CacheCleaner cacheCleaner = null;
tim@845: 
tim@845:     /**
tim@99:      * Basic-Constructor of this Class
tim@99:      */
tim@99:     private CacheFactory() {
tim@99:         super();
tim@99:     }
tim@99: 
tim@99:     /**
tim@99:      * This Method provides an singleton Instance of this Class.
sascha@778:      *
tim@99:      * @return an singleton Instance of this Class
tim@99:      */
tim@171:     public static CacheFactory getInstance() {
tim@171:         if (instance == null) {
tim@99:             instance = new CacheFactory();
tim@99:         }
tim@99:         return instance;
tim@99:     }
tim@171: 
tim@99:     /**
tim@99:      * Getting the ConnectionPool
sascha@778:      *
tim@99:      * @return the ConnectionPool
tim@99:      */
tim@171:     public Cache getCache() {
tim@99:         return this.cacheManager.getCache(CACHENAME);
tim@99:     }
tim@99: 
tim@99:     /**
tim@171:      * Initializes the ConnectionPool. Should only be called once on system
tim@171:      * startup
sascha@778:      *
ingo@790:      * @param configurationFileName
tim@99:      */
tim@171:     public void initializeCache(String configurationFileName) {
tim@171:         if (cacheManager == null) {
tim@99:             cacheManager = new CacheManager(configurationFileName);
tim@99:             cacheManager.addCache(CACHENAME);
ingo@1065: 
ingo@1065:             MBeanServer beanServer = ManagementFactory.getPlatformMBeanServer();
ingo@1065:             ManagementService.registerMBeans(
ingo@1065:                 cacheManager, beanServer, false, false, false, true);
ingo@1065: 
tim@845:             this.cacheCleaner = new ThematicDataCacheCleaner();
tim@845:             this.cacheCleaner.start();
tim@99:         }
tim@99:     }
tim@99: 
tim@99:     /**
tim@99:      * Checks if the ConnectionPool has already been initialized.
sascha@778:      *
tim@99:      * @return true if the ConnectionPool is initialized.
tim@99:      */
tim@171:     public boolean isInitialized() {
tim@99:         return this.cacheManager != null;
tim@99:     }
tim@99: 
tim@99: }