| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.cocoon.ojb.odmg.components; |
| |
| import org.apache.avalon.framework.activity.Disposable; |
| import org.apache.avalon.framework.activity.Initializable; |
| import org.apache.avalon.framework.logger.AbstractLogEnabled; |
| import org.apache.avalon.framework.thread.ThreadSafe; |
| |
| import org.apache.ojb.odmg.OJB; |
| import org.odmg.Database; |
| import org.odmg.Implementation; |
| import org.odmg.ODMGException; |
| |
| import java.util.Iterator; |
| import java.util.Set; |
| import java.util.HashMap; |
| |
| /** |
| * OJB backed implementation of the ODMG component. Creates a ODMG Implementation |
| * Object and stores it for the future use. |
| * |
| * @author <a href="mailto:giacomo@apache.org">Giacomo Pati</a> |
| * @version CVS $Id$ |
| */ |
| public class ODMGImpl extends AbstractLogEnabled |
| implements ODMG, ThreadSafe, Initializable, Disposable { |
| |
| private static final String DEFAULT_CONNECTION ="default"; |
| private static final int DEFAULT_MODE = Database.OPEN_READ_WRITE; |
| |
| private Implementation odmg; |
| private HashMap databases = new HashMap(); |
| |
| /* (non-Javadoc) |
| * @see org.apache.avalon.framework.activity.Initializable#initialize() |
| */ |
| public void initialize() throws Exception { |
| // Get the Implementation |
| this.odmg = OJB.getInstance(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.avalon.framework.activity.Disposable#dispose() |
| */ |
| public void dispose() { |
| final Set keys = this.databases.keySet(); |
| for (Iterator i = keys.iterator(); i.hasNext();) { |
| final Database db = (Database) i.next(); |
| try { |
| db.close(); |
| } catch (ODMGException e) { |
| getLogger().error("OJB-ODMG: Cannot close Database", e); |
| } |
| i.remove(); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.cocoon.ojb.odmg.components.ODMG#getInstance() |
| */ |
| public Implementation getInstance() throws ODMGException { |
| return getInstance(DEFAULT_CONNECTION, DEFAULT_MODE); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.cocoon.ojb.odmg.components.ODMG#getInstance(java.lang.String) |
| */ |
| public Implementation getInstance(String connection) throws ODMGException { |
| return getInstance(connection, DEFAULT_MODE); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.cocoon.ojb.odmg.components.ODMG#getInstance(int) |
| */ |
| public Implementation getInstance(int mode) throws ODMGException { |
| return getInstance(DEFAULT_CONNECTION, mode); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.cocoon.ojb.odmg.components.ODMG#getInstance(java.lang.String, int) |
| */ |
| public Implementation getInstance(String connection, int mode) throws ODMGException { |
| synchronized (this.databases) { |
| Database db = (Database) this.databases.get(connection + ":" + mode); |
| if (null == db) { |
| db = this.odmg.newDatabase(); |
| db.open(connection, mode); |
| this.databases.put(connection + ":" + mode, db); |
| } |
| } |
| return this.odmg; |
| } |
| } |