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/*
 * Copyright (c) 2009-2016, Data Geekery GmbH (http://www.datageekery.com)
 * All rights reserved.
 *
 * 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.
 *
 * Other licenses:
 * -----------------------------------------------------------------------------
 * Commercial licenses for this work are available. These replace the above
 * ASL 2.0 and offer limited warranties, support, maintenance, and commercial
 * database integrations.
 *
 * For more information, please visit: http://www.jooq.org/licenses
 *
 *
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 */
package org.jooq.impl;

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

import javax.sql.DataSource;

import org.jooq.ConnectionProvider;
import org.jooq.exception.DataAccessException;

/**
 * A default implementation for a pooled {@link DataSource}-oriented
 * {@link ConnectionProvider}
 * 
 * This implementation wraps a JDBC {@link DataSource}. jOOQ will use that data
 * source for initialising connections, and creating statements.
 * 
 * Use this connection provider if you want to run distributed transactions,
 * such as javax.transaction.UserTransaction. jOOQ will
 * {@link Connection#close() close()} all connections after query execution (and
 * result fetching) in order to return the connection to the connection pool. If
 * you do not use distributed transactions, this will produce driver-specific
 * behaviour at the end of query execution at close() invocation
 * (e.g. a transaction rollback). Use a {@link DefaultConnectionProvider}
 * instead, to control the connection's lifecycle, or implement your own
 * {@link ConnectionProvider}.
 *
 * @author Aaron Digulla
 * @author Lukas Eder
 */
public class DataSourceConnectionProvider implements ConnectionProvider {

    private final DataSource dataSource;

    public DataSourceConnectionProvider(DataSource dataSource) {
        this.dataSource = dataSource;
    }

    public DataSource dataSource() {
        return dataSource;
    }

    @Override
    public Connection acquire() {
        try {
            return dataSource.getConnection();
        }
        catch (SQLException e) {
            throw new DataAccessException("Error getting connection from data source " + dataSource, e);
        }
    }

    @Override
    public void release(Connection connection) {
        try {
            connection.close();
        }
        catch (SQLException e) {
            throw new DataAccessException("Error closing connection " + connection, e);
        }
    }
}