org.springframework.jdbc.datasource.embedded.DerbyEmbeddedDatabaseConfigurer.java Source code

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Here is the source code for org.springframework.jdbc.datasource.embedded.DerbyEmbeddedDatabaseConfigurer.java

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/*
 * Copyright 2002-2017 the original author or 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.springframework.jdbc.datasource.embedded;

import java.sql.SQLException;
import java.util.Properties;
import javax.sql.DataSource;

import org.apache.commons.logging.LogFactory;
import org.apache.derby.jdbc.EmbeddedDriver;

import org.springframework.lang.Nullable;

/**
 * {@link EmbeddedDatabaseConfigurer} for the Apache Derby database 10.6+.
 * <p>Call {@link #getInstance()} to get the singleton instance of this class.
 *
 * @author Oliver Gierke
 * @author Juergen Hoeller
 * @since 3.0
 */
final class DerbyEmbeddedDatabaseConfigurer implements EmbeddedDatabaseConfigurer {

    private static final String URL_TEMPLATE = "jdbc:derby:memory:%s;%s";

    @Nullable
    private static DerbyEmbeddedDatabaseConfigurer instance;

    /**
     * Get the singleton {@link DerbyEmbeddedDatabaseConfigurer} instance.
     * @return the configurer
     * @throws ClassNotFoundException if Derby is not on the classpath
     */
    public static synchronized DerbyEmbeddedDatabaseConfigurer getInstance() throws ClassNotFoundException {
        if (instance == null) {
            // disable log file
            System.setProperty("derby.stream.error.method",
                    OutputStreamFactory.class.getName() + ".getNoopOutputStream");
            instance = new DerbyEmbeddedDatabaseConfigurer();
        }
        return instance;
    }

    private DerbyEmbeddedDatabaseConfigurer() {
    }

    @Override
    public void configureConnectionProperties(ConnectionProperties properties, String databaseName) {
        properties.setDriverClass(EmbeddedDriver.class);
        properties.setUrl(String.format(URL_TEMPLATE, databaseName, "create=true"));
        properties.setUsername("sa");
        properties.setPassword("");
    }

    @Override
    public void shutdown(DataSource dataSource, String databaseName) {
        try {
            new EmbeddedDriver().connect(String.format(URL_TEMPLATE, databaseName, "drop=true"), new Properties());
        } catch (SQLException ex) {
            // Error code that indicates successful shutdown
            if (!"08006".equals(ex.getSQLState())) {
                LogFactory.getLog(getClass()).warn("Could not shut down embedded Derby database", ex);
            }
        }
    }

}