org.exitcode.spring.torque.TorqueDelegatingDataSource.java Source code

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Here is the source code for org.exitcode.spring.torque.TorqueDelegatingDataSource.java

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/*
 * Copyright 2015 The original authors
 *
 * 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 org.exitcode.spring.torque;

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

import javax.sql.DataSource;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.torque.Torque;
import org.apache.torque.TorqueException;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.jdbc.datasource.AbstractDataSource;
import org.springframework.util.Assert;

/**
 * Basic {@link DataSource} implementation that obtain JDBC connections from Torque. Note that Torque must be
 * initialized before any connection can be grabbed. Otherwise you will get {@link SQLException}.
 * 
 * @author Marek Holly
 */
public class TorqueDelegatingDataSource extends AbstractDataSource implements InitializingBean {

    private static final Log LOG = LogFactory.getLog(TorqueDelegatingDataSource.class);

    private String databaseName;

    /**
     * Create new empty {@code TorqueDelegatingDataSource}.
     */
    public TorqueDelegatingDataSource() {
    }

    /**
     * Create new {@code TorqueDelegatingDataSource} which will retrieve connections from given database.
     * 
     * @param databaseName name of the database to obtain connections from
     */
    public TorqueDelegatingDataSource(String databaseName) {
        this.databaseName = databaseName;
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        Assert.notNull(databaseName, "Property 'databaseName' is required!");
    }

    @Override
    public Connection getConnection() throws SQLException {
        LOG.debug("getConnection(), db: " + databaseName);
        try {
            return Torque.getConnection(databaseName);
        } catch (TorqueException e) {
            throw new SQLException(e);
        }
    }

    @Override
    public Connection getConnection(String username, String password) throws SQLException {
        throw new UnsupportedOperationException("This operation is not supported!");
    }

    /**
     * Return name of database used to obtain JDBC connections from.
     * 
     * @return database name
     */
    public String getDatabaseName() {
        return databaseName;
    }

    /**
     * Set name of the database used to obtain JDBC connections from.
     * 
     * @param databaseName database name
     */
    public void setDatabaseName(String databaseName) {
        this.databaseName = databaseName;
    }
}