com.nabla.wapp.server.database.TomcatConnectionPool.java Source code

Introduction

Here is the source code for com.nabla.wapp.server.database.TomcatConnectionPool.java

Source

/**
* Copyright 2012 nabla
*
* 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 com.nabla.wapp.server.database;

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

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.nabla.wapp.server.general.Assert;

public class TomcatConnectionPool implements IConnectionPool {

    private static final Log log = LogFactory.getLog(Database.class);
    private final DataSource dataSource;

    /**
     * Constructor
     * @param dbName         - database name as defined in pool
     * @throws SQLException 
     */
    public TomcatConnectionPool(final String dbName) throws SQLException {
        Assert.argumentNotNull(dbName, "Have you set the database name in your web.xml file?");

        try {
            final Context initContext = new InitialContext();
            final Context ctx = (Context) initContext.lookup("java:/comp/env");
            dataSource = (DataSource) ctx.lookup("jdbc/" + dbName);
        } catch (NamingException e) {
            if (log.isDebugEnabled())
                log.debug("fail to get datasource '" + dbName + "'", e);
            throw new SQLException("fail to get database '" + dbName + "'");
        }
    }

    @Override
    public Connection get() throws SQLException {
        return dataSource.getConnection();
    }

}