Mercurial > dive4elements > gnv-client
view geo-backend/src/main/java/de/intevation/gnv/geobackend/base/query/QueryExecutorFactory.java @ 1122:1985d5db0feb
Implemented a global configuration that should be used to initialize the geobackend.
geo-backend/trunk@1149 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Thu, 03 Jun 2010 13:31:07 +0000 |
parents | b757def3ff55 |
children | ebeb56428409 |
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package de.intevation.gnv.geobackend.base.query; import de.intevation.gnv.geobackend.config.Configuration; import org.apache.log4j.Logger; /** * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> * */ public class QueryExecutorFactory { public static final String QUERY_EXECUTOR_FACTORY = "query.executor.factory"; /** * the logger, used to log exceptions and additonaly information */ private static Logger log = Logger.getLogger(QueryExecutorFactory.class); /** * The singleton Instance of this Factory. */ private static QueryExecutorFactory instance = null; /** * Basic-Constructor of this Class */ public QueryExecutorFactory() { super(); } /** * This Method provides an singleton Instance of this Class. * @return an singleton Instance of this Class */ public static synchronized QueryExecutorFactory getInstance(){ if (instance == null) { Configuration config = Configuration.getInstance(); if (config.isCacheEnabled()) { final QueryExecutorFactory factory = new CachingQueryExecutorFactory(); Runtime.getRuntime().addShutdownHook(new Thread() { @Override public void run() { factory.shutdown(); } }); return instance = factory; } instance = new QueryExecutorFactory(); } return instance; } public void shutdown() { } /** * Getting the QueryExecutor * @return the QueryExecutor */ public QueryExecutor getQueryExecutor(){ return new DefaultQueryExceutor(); } }