/*
* Copyright 2006-2007 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.batch.test;
import java.io.IOException;
import java.util.List;
import javax.sql.DataSource;
import org.apache.commons.io.IOUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.BeanInitializationException;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.core.io.Resource;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallback;
import org.springframework.transaction.support.TransactionTemplate;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
import org.springframework.util.StringUtils;
/**
* Wrapper for a {@link DataSource} that can run scripts on start up and shut
* down. Us as a bean definition <br><br>
*
* Run this class to initialize a database in a running server process.
* Make sure the server is running first by launching the "hsql-server" from the
* <code>hsql.server</code> project. Then you can right click in Eclipse and
* Run As -> Java Application. Do the same any time you want to wipe the
* database and start again.
*
* @author Dave Syer
*
*/
public class DataSourceInitializer implements InitializingBean, DisposableBean {
private static final Log logger = LogFactory.getLog(DataSourceInitializer.class);
private Resource[] initScripts;
private Resource[] destroyScripts;
private DataSource dataSource;
private boolean ignoreFailedDrop = true;
private boolean initialized = false;
/**
* Main method as convenient entry point.
*
* @param args
*/
@SuppressWarnings("resource")
public static void main(String... args) {
new ClassPathXmlApplicationContext(ClassUtils.addResourcePathToPackagePath(DataSourceInitializer.class,
DataSourceInitializer.class.getSimpleName() + "-context.xml"));
}
@Override
public void destroy() {
if (destroyScripts==null) return;
for (int i = 0; i < destroyScripts.length; i++) {
Resource destroyScript = destroyScripts[i];
try {
doExecuteScript(destroyScript);
}
catch (Exception e) {
if (logger.isDebugEnabled()) {
logger.warn("Could not execute destroy script [" + destroyScript + "]", e);
}
else {
logger.warn("Could not execute destroy script [" + destroyScript + "]");
}
}
}
}
@Override
public void afterPropertiesSet() throws Exception {
Assert.notNull(dataSource);
initialize();
}
private void initialize() {
if (!initialized) {
destroy();
if (initScripts != null) {
for (int i = 0; i < initScripts.length; i++) {
Resource initScript = initScripts[i];
doExecuteScript(initScript);
}
}
initialized = true;
}
}
private void doExecuteScript(final Resource scriptResource) {
if (scriptResource == null || !scriptResource.exists())
return;
TransactionTemplate transactionTemplate = new TransactionTemplate(new DataSourceTransactionManager(dataSource));
transactionTemplate.execute(new TransactionCallback<Void>() {
@Override
@SuppressWarnings("unchecked")
public Void doInTransaction(TransactionStatus status) {
JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource);
String[] scripts;
try {
scripts = StringUtils.delimitedListToStringArray(stripComments(IOUtils.readLines(scriptResource
.getInputStream())), ";");
}
catch (IOException e) {
throw new BeanInitializationException("Cannot load script from [" + scriptResource + "]", e);
}
for (int i = 0; i < scripts.length; i++) {
String script = scripts[i].trim();
if (StringUtils.hasText(script)) {
try {
jdbcTemplate.execute(script);
}
catch (DataAccessException e) {
if (ignoreFailedDrop && script.toLowerCase().startsWith("drop")) {
logger.debug("DROP script failed (ignoring): " + script);
}
else {
throw e;
}
}
}
}
return null;
}
});
}
private String stripComments(List<String> list) {
StringBuffer buffer = new StringBuffer();
for (String line : list) {
if (!line.startsWith("//") && !line.startsWith("--")) {
buffer.append(line + "\n");
}
}
return buffer.toString();
}
public void setInitScripts(Resource[] initScripts) {
this.initScripts = initScripts;
}
public void setDestroyScripts(Resource[] destroyScripts) {
this.destroyScripts = destroyScripts;
}
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
}
public void setIgnoreFailedDrop(boolean ignoreFailedDrop) {
this.ignoreFailedDrop = ignoreFailedDrop;
}
}