jp.go.nict.langrid.serviceexecutor.db.ConnectionManager.java Source code

Introduction

Here is the source code for jp.go.nict.langrid.serviceexecutor.db.ConnectionManager.java

Source

/*
 * $Id$
 *
 * This is a program to wrap language resources as Web services.
 * Copyright (C) 2005-2008 NICT Language Grid Project.
 *
 * This program is free software: you can redistribute it and/or modify it 
 * under the terms of the GNU Lesser General Public License as published by 
 * the Free Software Foundation, either version 2.1 of the License, or (at 
 * your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but 
 * WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser 
 * General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License 
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package jp.go.nict.langrid.serviceexecutor.db;

import java.sql.Connection;
import java.sql.SQLException;

import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;

import org.apache.commons.dbcp.BasicDataSource;

/**
 * 
 * 
 * @author Takao Nakaguchi
 * @author $Author$
 * @version $Revision$
 */
public class ConnectionManager {
    public ConnectionManager(ConnectionParameters params) throws NamingException {
        if (params.getJndiDataSourceName() != null) {
            initWithJNDI("java:comp/env/" + params.getJndiDataSourceName());
        } else {
            initWithBasicDataSource(params.getDriverName(), params.getUrl(), params.getUsername(),
                    params.getPassword(), params.getMaxActive(), params.getMaxIdle(), params.getMaxWait(),
                    params.getMaxPSActive());
        }
    }

    /**
     * 
     * 
     */
    public synchronized Connection getConnection() throws SQLException {
        return dataSource.getConnection();
    }

    private void initWithJNDI(String jndiName) throws NamingException {
        this.dataSource = (DataSource) new InitialContext(System.getProperties()).lookup(jndiName);
    }

    private void initWithBasicDataSource(String driverClassName, String connectionUrl, String userName,
            String password, int maxActive, int maxIdle, int maxWait, int maxPSActive) {
        BasicDataSource bds = new BasicDataSource();
        bds.setDriverClassName(driverClassName);
        bds.setUrl(connectionUrl);
        bds.setUsername(userName);
        bds.setPassword(password);
        bds.setMaxActive(maxActive);
        bds.setMaxIdle(maxIdle);
        bds.setMaxWait(maxWait);
        if (maxPSActive != -1) {
            bds.setMaxOpenPreparedStatements(maxPSActive);
        }
        this.dataSource = bds;
    }

    private DataSource dataSource;
}