Mercurial > dive4elements > gnv-client
comparison 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> |
|---|---|
| date | Thu, 03 Jun 2010 13:31:07 +0000 |
| parents | b757def3ff55 |
| children | ebeb56428409 |
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| 1121:9d530f913729 | 1122:1985d5db0feb |
|---|---|
| 1 package de.intevation.gnv.geobackend.base.query; | 1 package de.intevation.gnv.geobackend.base.query; |
| 2 | |
| 3 import de.intevation.gnv.geobackend.config.Configuration; | |
| 2 | 4 |
| 3 import org.apache.log4j.Logger; | 5 import org.apache.log4j.Logger; |
| 4 | 6 |
| 5 /** | 7 /** |
| 6 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> | 8 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a> |
| 32 * This Method provides an singleton Instance of this Class. | 34 * This Method provides an singleton Instance of this Class. |
| 33 * @return an singleton Instance of this Class | 35 * @return an singleton Instance of this Class |
| 34 */ | 36 */ |
| 35 public static synchronized QueryExecutorFactory getInstance(){ | 37 public static synchronized QueryExecutorFactory getInstance(){ |
| 36 if (instance == null) { | 38 if (instance == null) { |
| 37 String className = System.getProperty(QUERY_EXECUTOR_FACTORY); | 39 Configuration config = Configuration.getInstance(); |
| 38 if (className != null) { | 40 |
| 39 try { | 41 if (config.isCacheEnabled()) { |
| 40 Class clazz = Class.forName(className); | 42 final QueryExecutorFactory factory = |
| 41 final QueryExecutorFactory factory = | 43 new CachingQueryExecutorFactory(); |
| 42 (QueryExecutorFactory)clazz.newInstance(); | 44 Runtime.getRuntime().addShutdownHook(new Thread() { |
| 43 Runtime.getRuntime().addShutdownHook(new Thread() { | 45 @Override |
| 44 @Override | 46 public void run() { |
| 45 public void run() { | 47 factory.shutdown(); |
| 46 factory.shutdown(); | 48 } |
| 47 } | 49 }); |
| 48 }); | 50 return instance = factory; |
| 49 return instance = factory; | |
| 50 } | |
| 51 catch (ClassNotFoundException cnfe) { | |
| 52 log.error(cnfe); | |
| 53 } | |
| 54 catch (InstantiationException ie) { | |
| 55 log.error(ie); | |
| 56 } | |
| 57 catch(IllegalAccessException iae) { | |
| 58 log.error(iae); | |
| 59 } | |
| 60 catch (ClassCastException cce) { | |
| 61 log.error(cce); | |
| 62 } | |
| 63 } | 51 } |
| 64 | 52 |
| 65 instance = new QueryExecutorFactory(); | 53 instance = new QueryExecutorFactory(); |
| 66 } | 54 } |
| 67 return instance; | 55 return instance; |