001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.activemq.store.jdbc;
018
019import java.io.File;
020import java.io.IOException;
021
022import javax.sql.DataSource;
023
024import org.apache.activemq.util.IOHelper;
025//import org.apache.derby.jdbc.EmbeddedDataSource;
026
027/**
028 * A helper class which provides a factory method to create a default
029 * {@link DataSource) if one is not provided.
030 * 
031 * 
032 */
033public class DataSourceSupport {
034
035    private String dataDirectory = IOHelper.getDefaultDataDirectory();
036    private File dataDirectoryFile;
037    private DataSource dataSource;
038
039    public DataSourceSupport() {
040    }
041
042    public DataSourceSupport(DataSource dataSource) {
043        this.dataSource = dataSource;
044    }
045
046    public File getDataDirectoryFile() {
047        if (dataDirectoryFile == null) {
048            dataDirectoryFile = new File(getDataDirectory());
049        }
050        return dataDirectoryFile;
051    }
052
053    public void setDataDirectoryFile(File dataDirectory) {
054        this.dataDirectoryFile = dataDirectory;
055    }
056
057    public String getDataDirectory() {
058        return dataDirectory;
059    }
060
061    public void setDataDirectory(String dataDirectory) {
062        this.dataDirectory = dataDirectory;
063    }
064
065    public DataSource getDataSource() throws IOException {
066        if (dataSource == null) {
067            dataSource = createDataSource();
068            if (dataSource == null) {
069                throw new IllegalArgumentException("No dataSource property has been configured");
070            }
071        }
072        return dataSource;
073    }
074
075    public void setDataSource(DataSource dataSource) {
076        this.dataSource = dataSource;
077    }
078
079    protected DataSource createDataSource() throws IOException {
080
081        // Setup the Derby datasource.
082        System.setProperty("derby.system.home", getDataDirectoryFile().getCanonicalPath());
083        System.setProperty("derby.storage.fileSyncTransactionLog", "true");
084        System.setProperty("derby.storage.pageCacheSize", "100");
085
086        //final EmbeddedDataSource ds = new EmbeddedDataSource();
087        //ds.setDatabaseName("derbydb");
088        //ds.setCreateDatabase("create");
089        //return ds;
090        return null;
091    }
092
093    public String toString() {
094        return "" + dataSource;
095    }
096
097}