org.seadva.access.security.model.DatabaseSingleton.java Source code

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Here is the source code for org.seadva.access.security.model.DatabaseSingleton.java

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/*
 * Copyright 2013 The Trustees of Indiana University
 *
 * Licensed 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.seadva.access.security.model;

import org.apache.commons.dbcp.ConnectionFactory;
import org.apache.commons.dbcp.DriverConnectionFactory;
import org.apache.commons.dbcp.PoolableConnectionFactory;
import org.apache.commons.dbcp.PoolingDataSource;
import org.apache.commons.pool.impl.GenericObjectPool;

import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

public class DatabaseSingleton {
    private static DatabaseSingleton instance = null;

    private static int maxConnections = 5;
    private GenericObjectPool connectionPool = null;
    DataSource dataSource;

    public static String dbUrl;
    public static String driver;
    public static String dbUsername;
    public static String dbUserPwd;

    protected DatabaseSingleton()
            throws InstantiationException, IllegalAccessException, ClassNotFoundException, SQLException {

        Class.forName(this.driver).newInstance();

        connectionPool = new GenericObjectPool();
        connectionPool.setMaxActive(10);

        Properties props = new Properties();
        props.setProperty("user", dbUsername);
        props.setProperty("password", dbUserPwd);

        ConnectionFactory cf = new DriverConnectionFactory(new com.mysql.jdbc.Driver(), dbUrl, props);
        PoolableConnectionFactory pcf = new PoolableConnectionFactory(cf, connectionPool, null, null, false, true);

        this.dataSource = new PoolingDataSource(connectionPool);

    }

    public static DatabaseSingleton getInstance(String databasePath, String username, String userPwd)
            throws InstantiationException, IllegalAccessException, ClassNotFoundException, SQLException {
        if (instance == null) {
            dbUrl = databasePath;
            driver = "com.mysql.jdbc.Driver";
            dbUsername = username;
            dbUserPwd = userPwd;
            instance = new DatabaseSingleton();
        }
        return instance;
    }

    public Connection getConnection() throws Exception {

        return dataSource.getConnection();
    }

}