com.hangum.tadpole.tajo.core.connections.manager.ConnectionPoolManager.java Source code

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Here is the source code for com.hangum.tadpole.tajo.core.connections.manager.ConnectionPoolManager.java

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/*******************************************************************************
 * Copyright (c) 2013 hangum.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser Public License v2.1
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * 
 * Contributors:
 *     hangum - initial API and implementation
 ******************************************************************************/
package com.hangum.tadpole.tajo.core.connections.manager;

import java.util.HashMap;
import java.util.Map;

import javax.sql.DataSource;

import org.apache.commons.dbcp.ConnectionFactory;
import org.apache.commons.dbcp.DriverManagerConnectionFactory;
import org.apache.commons.dbcp.PoolableConnectionFactory;
import org.apache.commons.dbcp.PoolingDataSource;
import org.apache.commons.pool.impl.GenericObjectPool;
import org.apache.log4j.Logger;

import com.hangum.tadpole.cipher.core.manager.CipherManager;
import com.hangum.tadpole.engine.query.dao.system.UserDBDAO;

/**
 * DBCP connection manager
 * 
 * @author hangum
 *
 */
public class ConnectionPoolManager {
    private static final Logger logger = Logger.getLogger(ConnectionPoolManager.class);

    static {
        try {
            Class.forName("org.apache.tajo.jdbc.TajoDriver");
        } catch (Exception e) {
            logger.error("Apache Tajo Class not found exception", e);
        }
    }

    public static ConnectionPoolManager instance = null;//new ConnectionPoolManager();
    private static Map<String, DataSource> mapDataSource = new HashMap<String, DataSource>();

    private ConnectionPoolManager() {
    }

    public static ConnectionPoolManager getInstance(final UserDBDAO userDB) {
        if (instance == null) {
            instance = new ConnectionPoolManager();
        }
        return instance;
    }

    private static DataSource makePool(UserDBDAO userDB) {
        GenericObjectPool connectionPool = new GenericObjectPool();
        connectionPool.setMaxActive(5);
        //      connectionPool.setWhenExhaustedAction((byte)1);
        //      connectionPool.setMaxWait(1000 * 60);                // 1.
        //      connectionPool.setTimeBetweenEvictionRunsMillis(3 * 1000);
        connectionPool.setTestWhileIdle(true);

        String passwdDecrypt = "";
        try {
            passwdDecrypt = CipherManager.getInstance().decryption(userDB.getPasswd());
        } catch (Exception e) {
            passwdDecrypt = userDB.getPasswd();
        }
        ConnectionFactory cf = new DriverManagerConnectionFactory(userDB.getUrl(), userDB.getUsers(),
                passwdDecrypt);

        PoolableConnectionFactory pcf = new PoolableConnectionFactory(cf, connectionPool, null, null, false, true);
        DataSource ds = new PoolingDataSource(connectionPool);
        mapDataSource.put(getKey(userDB), ds);

        return ds;
    }

    public static DataSource getDataSource(final UserDBDAO userDB) {
        DataSource retDataSource = mapDataSource.get(getKey(userDB));
        if (retDataSource == null) {
            return makePool(userDB);
        }

        return retDataSource;
    }

    /**
     * map?  .
     * @param userDB
     * @return
     */
    private static String getKey(final UserDBDAO userDB) {
        return userDB.getSeq() + userDB.getDbms_type() + userDB.getUrl() + userDB.getUsers();//+dbInfo.getPasswd();
    }

}