-package mircoders.storage;
-
-import java.lang.*;
-import java.sql.*;
-import java.io.*;
-import java.util.*;
+/*
+ * 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 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.
+ */
-import freemarker.template.*;
+package mircoders.storage;
-import mir.storage.*;
-import mir.entity.*;
-import mir.misc.*;
+import java.sql.Connection;
+import java.sql.Statement;
-import mircoders.entity.*;
+import mir.log.LoggerWrapper;
+import mir.storage.Database;
+import mir.storage.StorageObject;
+import mir.storage.StorageObjectFailure;
/**
* <b>this class implements the access to the content-table</b>
public class DatabaseContent extends Database implements StorageObject {
- private static DatabaseContent instance;
- private static EntityRelation relationComments;
- private static EntityRelation relationFeature;
-
- // Contructors / Singleton
-
- public static DatabaseContent getInstance()
- throws StorageObjectException {
-
- if (instance == null ) {
- instance = new DatabaseContent();
- instance.myselfDatabase = instance;
- }
- return instance;
- }
-
- private DatabaseContent()
- throws StorageObjectException {
-
- super();
- this.theTable="content";
- this.theCoreTable="media";
- relationComments = new EntityRelation("id", "to_media", DatabaseComment.getInstance(), EntityRelation.TO_MANY);
- relationFeature = new EntityRelation("id", "to_feature", DatabaseFeature.getInstance(), EntityRelation.TO_ONE);
- try { this.theEntityClass = Class.forName("mir.entity.EntityContent"); }
- catch (Exception e) { throw new StorageObjectException(e.toString()); }
- }
-
- // methods
-
- /**
- * sets the database flag is_produced to unproduced
- */
-
- public void setUnproduced(String where)
- {
- Connection con=null;Statement stmt=null;
- String sql = "update content set is_produced=0 where " + where;
- try {
- con = getPooledCon();
- // should be a preparedStatement because is faster
- stmt = con.createStatement();
- executeSql(stmt,sql);
- }
- catch (Exception e) {theLog.printDebugInfo("-- set unproduced failed");}
- finally { freeConnection(con,stmt);}
- }
-
- /**
- * returns the comments that belong to the article (via entityrelation)
- */
- public SimpleList getComments(EntityContent entC) {
- SimpleList comments=null;
- try {
- comments = relationComments.getManyAsSimpleList(entC,"webdb_create");
- }
- catch (StorageObjectException e) {
- theLog.printError("DatabaseComments :: failed to get comments");
- }
- return comments;
- }
-
- /**
- * returns the features that belong to the article (via entityrelation)
- */
- public SimpleList getFeature(EntityContent entC) {
- SimpleList feature=null;
- try {
- feature = relationFeature.getManyAsSimpleList(entC);
- }
- catch (StorageObjectException e) {
- theLog.printError("DatabaseComments :: failed to get features");
- }
- return feature;
- }
-
- public boolean delete(String id)
- throws StorageObjectException {
- DatabaseComment.getInstance().deleteByContentId(id);
- super.delete(id);
- return true;
- }
+ private static DatabaseContent instance;
+
+ // Contructors / Singleton
+
+ // 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 DatabaseContent getInstance() {
+
+ if (instance == null ) {
+ instance = new DatabaseContent();
+ }
+ return instance;
+ }
+
+ private DatabaseContent() throws StorageObjectFailure {
+
+ super();
+ mainTable="content";
+ primaryKeySequence="media_id_seq";
+ logger = new LoggerWrapper("Database.Content");
+
+ theEntityClass = mircoders.entity.EntityContent.class;
+ }
+
+ // methods
+
+ /**
+ * sets the database flag is_produced to unproduced
+ */
+
+ public void setUnproduced(String where) throws StorageObjectFailure
+ {
+ Connection con=null;Statement stmt=null;
+ String sql = "update content set is_produced='0' where " + where;
+ logger.debug("set unproduced: "+where);
+ try {
+ con = obtainConnection();
+ // should be a preparedStatement because is faster
+ stmt = con.createStatement();
+ executeUpdate(stmt,sql);
+ logger.debug("set unproduced: "+where);
+ }
+ catch (Exception e) {
+ _throwStorageObjectException(e, "-- set unproduced failed");
+ }
+ finally { freeConnection(con,stmt);}
+ }
+
+ /**
+ *
+ * @param id
+ * @return
+ * @throws StorageObjectFailure
+ */
+
+ public boolean delete(String id) throws StorageObjectFailure
+ {
+ DatabaseComment.getInstance().deleteByContentId(id);
+ DatabaseContentToTopics.getInstance().deleteByContentId(id);
+ DatabaseContentToMedia.getInstance().deleteByContentId(id);
+
+ return super.delete(id);
+ }
}
projects / mir.git / blobdiff