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/*
 * Copyright (C) 2008 Search Solution Corporation. All rights reserved by Search Solution. 
 *
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met: 
 *
 * - Redistributions of source code must retain the above copyright notice, 
 *   this list of conditions and the following disclaimer. 
 *
 * - Redistributions in binary form must reproduce the above copyright notice, 
 *   this list of conditions and the following disclaimer in the documentation 
 *   and/or other materials provided with the distribution. 
 *
 * - Neither the name of the  nor the names of its contributors 
 *   may be used to endorse or promote products derived from this software without 
 *   specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
 * IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
 * OF SUCH DAMAGE. 
 *
 */

package cubrid.jdbc.driver;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;

abstract class CUBRIDConnectionPoolManager {
	private static Hashtable connectionPooltable;
	private static Hashtable poolDataSourceTable;

	static {
		connectionPooltable = new Hashtable();
		poolDataSourceTable = new Hashtable();
	}

	static Connection getConnection(CUBRIDConnectionPoolDataSource pds,
			String user, String passwd) throws SQLException {
		CUBRIDConnectionEventListener cp;

		String key = pds.getDataSourceID(user);

		synchronized (connectionPooltable) {
			cp = connectionPooltable.get(key);

			if (cp == null) {
				cp = addConnectionPool(key, pds);
			}
		}

		return cp.getConnection(user, passwd);
	}

	static CUBRIDConnectionPoolDataSource getConnectionPoolDataSource(
			String dsName) throws SQLException {
		CUBRIDConnectionPoolDataSource cpds;

		synchronized (poolDataSourceTable) {
			cpds = poolDataSourceTable.get(dsName);

			if (cpds == null) {
				try {
					Context ctx = new InitialContext();
					cpds = (CUBRIDConnectionPoolDataSource) ctx.lookup(dsName);
				} catch (NamingException e) {
					throw new CUBRIDException(CUBRIDJDBCErrorCode.unknown, e.toString(), e);
				}

				poolDataSourceTable.put(dsName, cpds);
			}
		}

		return cpds;
	}

	static private CUBRIDConnectionEventListener addConnectionPool(String key,
			CUBRIDConnectionPoolDataSource pds) {
		CUBRIDConnectionEventListener cp = new CUBRIDConnectionEventListener(pds);
		connectionPooltable.put(key, cp);
		return cp;
	}
}