tim@130: /**
tim@130:  * 
tim@130:  */
tim@130: package de.intevation.gnv.geobackend.base.connectionpool;
tim@130: 
tim@130: import java.util.Properties;
tim@130: 
tim@130: import org.apache.log4j.Logger;
tim@130: 
tim@130: import de.intevation.gnv.geobackend.sde.connectionpool.ArcSDEConnectionPool;
tim@130: 
tim@130: /**
tim@130:  * Factoryimplementation for the Interface ConnectionPool.
tim@130:  * This factory delivers Instances of the Interface ConnectionPool.
tim@130:  * @author Tim Englich <tim.englich@intevation.de>
tim@130:  */
tim@130: public class ConnectionPoolFactory {
tim@130: 
tim@130: 	
tim@130: 	/**
tim@130:      * the logger, used to log exceptions and additonaly information
tim@130:      */
tim@130:     private static Logger log = Logger.getLogger(ConnectionPoolFactory.class);
tim@130: 	
tim@130:     
tim@130:     /**
tim@130:      * The singleton Instance of this Factory.
tim@130:      */
tim@130: 	private static ConnectionPoolFactory instance = null;
tim@130: 	
tim@130: 	/**
tim@130: 	 * The ConnectionPool providing the Connections to the DatabaseBackends
tim@130: 	 */
tim@130: 	private ConnectionPool connectionPool = null;
tim@130: 	
tim@130: 	/**
tim@130: 	 * Basic-Constructor of this Class
tim@130: 	 */
tim@130: 	private ConnectionPoolFactory() {
tim@130: 		super();
tim@130: 	}
tim@130: 	
tim@130: 	
tim@130: 	/**
tim@130: 	 * This Method provides an singleton Instance of this Class.
tim@130: 	 * @return an singleton Instance of this Class
tim@130: 	 */
tim@130: 	public static ConnectionPoolFactory getInstance(){
tim@130: 		if (instance == null){
tim@130: 			instance = new ConnectionPoolFactory();
tim@130: 		}
tim@130: 		return instance;
tim@130: 	}
tim@130: 	
tim@130: 	
tim@130: 	/**
tim@130: 	 * Getting the ConnectionPool
tim@130: 	 * @return the ConnectionPool
tim@130: 	 */
tim@130: 	public ConnectionPool getConnectionPool(){
tim@130: 		return this.connectionPool;
tim@130: 	}
tim@130: 	
tim@130: 	
tim@130: 	/**
tim@130: 	 * Initializes the ConnectionPool.
tim@130: 	 * Should only be called once on system startup
tim@130: 	 * @param properties the Properties for the Individual Configuration of the ConnectionPool
tim@130: 	 */
tim@130: 	public void initializeConnectionPool(Properties properties){
tim@130: 		log.debug("ConnectionPoolFactory.initializeConnectionPool");
tim@130: 		if (this.connectionPool == null){
tim@130: 			//TODO: Hier könnte anhand eines Flags die Instanz des Connectionpools umgeschaltet werden.
tim@130: 			this.connectionPool = new ArcSDEConnectionPool();
tim@130: 			this.connectionPool.initialize(properties);
tim@130: 		}else{
tim@130: 			log.warn("ConnectionPool already initialized");
tim@130: 		}	
tim@130: 	}
tim@130: 	
tim@130: 	/**
tim@130: 	 * Checks if the ConnectionPool has already been initialized.
tim@130: 	 * @return true if the ConnectionPool is initialized.
tim@130: 	 */
tim@130: 	public boolean isInitialized(){
tim@130: 		return this.connectionPool != null;
tim@130: 	}
tim@130: }