Mercurial > dive4elements > gnv-client

annotate geo-backend/src/main/java/de/intevation/gnv/geobackend/base/query/container/QueryContainerFactory.java @ 893:8a652a451bc6

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Removed trailing whitespace. geo-backend/trunk@934 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Sat, 17 Apr 2010 09:28:02 +0000
parents a277ebde74e4
children ebeb56428409
rev   line source
132
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
1 package de.intevation.gnv.geobackend.base.query.container;
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
2
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
3 import java.util.Properties;
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
4
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
5 import org.apache.log4j.Logger;
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
6
891
a277ebde74e4 Added more JavaDoc
Tim Englich <tim.englich@intevation.de>
parents: 887
diff changeset
7 import de.intevation.gnv.geobackend.base.query.container.exception.QueryContainerException;
a277ebde74e4 Added more JavaDoc
Tim Englich <tim.englich@intevation.de>
parents: 887
diff changeset
8
132
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
9 /**
893
8a652a451bc6 Removed trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 891
diff changeset
10 * Factoryclass to provide a singleton-Instance of an
891
a277ebde74e4 Added more JavaDoc
Tim Englich <tim.englich@intevation.de>
parents: 887
diff changeset
11 * <code>QueryContainer</code>-Object
887
b757def3ff55 Bring @author javadoc tags in form '@author <a href="john.doe@example.com">John Doe</a>'
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 886
diff changeset
12 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
132
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
13 */
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
14 public class QueryContainerFactory {
885
1c3efbd2fc5a Removes trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 541
diff changeset
15
132
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
16 /**
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
17 * the logger, used to log exceptions and additonaly information
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
18 */
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
19 private static Logger log = Logger.getLogger(QueryContainerFactory.class);
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
20
885
1c3efbd2fc5a Removes trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 541
diff changeset
21
132
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
22 /**
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
23 * The singleton Instance of this Factory.
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
24 */
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
25 private static QueryContainerFactory instance = null;
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
26
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
27 /**
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
28 * The ConnectionPool providing the Connections to the DatabaseBackends
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
29 */
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
30 private QueryContainer queryContainer = null;
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
31
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
32 /**
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
33 * Basic-Constructor of this Class
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
34 */
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
35 private QueryContainerFactory() {
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
36 super();
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
37 }
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
38
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
39 /**
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
40 * This Method provides an singleton Instance of this Class.
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
41 * @return an singleton Instance of this Class
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
42 */
541
3cbf11c67fdc Experimental caching of SQL results via Ehache
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 132
diff changeset
43 public static synchronized QueryContainerFactory getInstance(){
132
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
44 if (instance == null){
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
45 instance = new QueryContainerFactory();
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
46 }
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
47 return instance;
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
48 }
885
1c3efbd2fc5a Removes trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 541
diff changeset
49
1c3efbd2fc5a Removes trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 541
diff changeset
50
132
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
51 /**
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
52 * Getting the QueryContainer
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
53 * @return the QueryContainer
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
54 */
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
55 public QueryContainer getQueryContainer(){
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
56 return this.queryContainer;
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
57 }
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
58
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
59 /**
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
60 * Initializes the QueryContainer.
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
61 * Should only be called once on system startup
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
62 * @param properties the Properties for the Individual Configuration of the QueryContainerbb
885
1c3efbd2fc5a Removes trailing whitespace.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 541
diff changeset
63 * @throws QueryContainerException
132
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
64 */
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
65 public synchronized void initializeQueryContainer(Properties properties) throws QueryContainerException{
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
66 log.debug("ConnectionPoolFactory.initializeConnectionPool");
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
67 if (this.queryContainer == null){
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
68 this.queryContainer = new DefaultQueryContainer();
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
69 this.queryContainer.initialize(properties);
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
70 }else{
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
71 log.warn("ConnectionPool already initialized");
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
72 }
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
73 }
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
74
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
75 /**
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
76 * Checks if the QueryContainer has already been initialized.
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
77 * @return true if the QueryContainer is initialized.
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
78 */
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
79 public boolean isInitialized(){
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
80 return this.queryContainer != null;
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
81 }
5a583cff97ea Implementation of the Datainfrastructure for fetching Data from different DataStores.
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
82 }
http://dive4elements.wald.intevation.org