+/*
+ * Copyright (C) 2001, 2002 The Mir-coders group
+ *
+ * This file is part of Mir.
+ *
+ * Mir is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Mir is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Mir; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * In addition, as a special exception, The Mir-coders gives permission to link
+ * the code of this program with the com.oreilly.servlet library, any library
+ * licensed under the Apache Software License, The Sun (tm) Java Advanced
+ * Imaging library (JAI), The Sun JIMI library (or with modified versions of
+ * the above that use the same license as the above), and distribute linked
+ * combinations including the two. You must obey the GNU General Public
+ * License in all respects for all of the code used other than the above
+ * mentioned libraries. If you modify this file, you may extend this exception
+ * to your version of the file, but you are not obligated to do so. If you do
+ * not wish to do so, delete this exception statement from your version.
+ */
+
package mircoders.storage;
import java.lang.*;
import freemarker.template.*;
-import webdb.storage.*;
-import webdb.entity.*;
-import webdb.misc.*;
+import mir.storage.*;
+import mir.entity.*;
+import mir.misc.*;
/**
* <b>Diese Klasse implementiert die Datenbankverbindung zur MetaObjekt-Tabelle
public class DatabaseTopics extends Database implements StorageObject{
- private static DatabaseTopics instance;
+ private static DatabaseTopics instance;
- public static DatabaseTopics getInstance() throws StorageObjectException {
- if (instance == null) {
- instance = new DatabaseTopics();
- instance.myselfDatabase = instance;
- }
- return instance;
- }
+ // the following *has* to be sychronized cause this static method
+ // could get preemted and we could end up with 2 instances of DatabaseFoo..
+ // see the "Singletons with needles and thread" article at JavaWorld -mh
+ public synchronized static DatabaseTopics getInstance()
+ throws StorageObjectException {
+ if (instance == null) {
+ instance = new DatabaseTopics();
+ instance.myselfDatabase = instance;
+ }
+ return instance;
+ }
- private DatabaseTopics() throws StorageObjectException
- {
+ private DatabaseTopics() throws StorageObjectException
+ {
super();
- this.cache = new HashMap();
- this.hasTimestamp = false;
- this.theTable="topic";
- try {
- this.theEntityClass = Class.forName("mir.entity.EntityTopics");
- }
- catch (Exception e) {
- throw new StorageObjectException(e.toString());
- }
-
- }
-
- public SimpleList getPopupData() {
- return getPopupData("title",true);
- }
+ //this.cache = new DatabaseCache(20);
+ this.hasTimestamp = false;
+ this.theTable="topic";
+ try {
+ this.theEntityClass = Class.forName("mircoders.entity.EntityTopics");
+ }
+ catch (Exception e) {
+ throw new StorageObjectException(e.toString());
+ }
+
+ }
+
+ public SimpleList getPopupData() throws StorageObjectException {
+ return getPopupData("title",true);
+ }