spring DerbyEmbeddedDatabaseConfigurer 源码
spring DerbyEmbeddedDatabaseConfigurer 代码
文件路径：/spring-jdbc/src/main/java/org/springframework/jdbc/datasource/embedded/DerbyEmbeddedDatabaseConfigurer.java
/*
* Copyright 2002-2018 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
*
* https://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.
*
* <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 instance
*/
public static synchronized DerbyEmbeddedDatabaseConfigurer getInstance() {
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);
}
}
}
}
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