/*
 * 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.ode.il.dbutil;

import java.io.File;
import java.sql.Connection;

import org.apache.ode.il.config.OdeConfigProperties;
import org.h2.jdbcx.JdbcDataSource;

public class H2EmbeddedDB extends InternalDB {

    private String _dbUrl = null;
    private String _dbName = null;
    
    public H2EmbeddedDB(OdeConfigProperties props) {
        super(props);
    }

    /**
     * Initialize embedded (H2) database.
     */
    @Override
    protected void initDataSource() throws DatabaseConfigException {
        String db = _odeConfig.getDbEmbeddedName();
        if (_workRoot == null) {
            _dbUrl = "jdbc:h2:mem:" + db + ";DB_CLOSE_DELAY=-1";
            JdbcDataSource hds = new JdbcDataSource();
            hds.setURL(_dbUrl);
            hds.setUser("sa");
            _datasource = hds;
        } else {
            _dbUrl = "jdbc:h2:" + _workRoot + File.separator + db + ";DB_CLOSE_ON_EXIT=FALSE";
            if (!_odeConfig.isDbEmbeddedCreate()) {
                _dbUrl += ";IFEXISTS=TRUE";
            }
            String clazz = org.h2.Driver.class.getName();
            _connectionManager = new DatabaseConnectionManager(_txm, _odeConfig);
            try {
                _connectionManager.init(_dbUrl, clazz, "sa", null);
            } catch (DatabaseConfigException ex) {
                __log.error("Unable to initialize connection pool", ex);
            }
            _datasource = _connectionManager.getDataSource();
        }
        __log.debug("Using Embedded Database: " + _dbUrl);
    }

    public void shutdownDB() {
        if (_connectionManager != null) {
            try {
                _connectionManager.shutdown();
            } catch (DatabaseConfigException ex) {
                __log.error("unable to shutdown connection pool", ex);
            }
        }
        try {
            Connection conn = getDataSource().getConnection();
            conn.createStatement().execute("SHUTDOWN");
        } catch (Throwable ex) {
            __log.debug("Error shutting down H2.", ex);
        }
    }
}