/*
* JBoss, Home of Professional Open Source.
* Copyright 2010, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.server.manager;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import org.jboss.as.model.Element;
import org.jboss.as.model.HostModel;
import org.jboss.logging.Logger;
import org.jboss.staxmapper.XMLContentWriter;
import org.jboss.staxmapper.XMLExtendedStreamWriter;
import org.jboss.staxmapper.XMLMapper;
/**
* Default implementation of {@link HostConfigurationPersister}.
*
* @author Brian Stansberry
*/
public class HostConfigurationPersisterImpl implements HostConfigurationPersister {
/** The expected name of the host configuration file */
public static final String CONFIG_FILE = "host.xml";
/** Suffix to append to the config file name to create the backup copy. */
public static final String BACKUP_SUFFIX = ".last-known-good";
private static Logger logger = Logger.getLogger("org.jboss.as.server.manager");
private final File configFile;
public HostConfigurationPersisterImpl(File configDir) {
if (configDir == null)
throw new IllegalArgumentException("Domain configuration directory is null");
File configFile = new File(configDir, CONFIG_FILE);
if (configFile.exists()) {
if (configFile.isDirectory()) {
throw new IllegalArgumentException(configFile.getAbsolutePath() + " is a directory");
}
}
else {
if (configFile.isDirectory() || !configDir.canWrite()) {
throw new IllegalArgumentException(configFile.getAbsolutePath() + " is not a writable");
}
}
this.configFile = configFile;
}
@Override
public InputStream getConfigurationInputStream() throws IOException {
return new FileInputStream(configFile);
}
@Override
public void persistConfiguration(final HostModel hostModel) {
FileOutputStream fos = null;
BufferedOutputStream bos = null;
XMLStreamWriter writer = null;
try {
backupConfigFile();
configFile.createNewFile();
fos = new FileOutputStream(configFile);
bos = new BufferedOutputStream(fos);
writer = XMLOutputFactory.newInstance().createXMLStreamWriter(bos);
final XMLMapper mapper = XMLMapper.Factory.create();
mapper.deparseDocument(new RootElementWriter(hostModel), writer);
}
catch (Exception e) {
logger.errorf(e, "Failed persisting configuration file %s" , configFile.getAbsolutePath());
}
finally {
if (writer != null) {
try {
writer.close();
} catch (XMLStreamException e) {
logger.warnf(e, "Failed closing writer to configuration file %s" , configFile.getAbsolutePath());
}
}
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
logger.warnf(e, "Failed closing output stream to configuration file %s" , configFile.getAbsolutePath());
}
}
}
}
private void backupConfigFile() throws IOException {
File backup = new File(configFile.getParent(), configFile.getName() + BACKUP_SUFFIX);
copyFile(configFile, backup);
}
private static void copyFile(File file, File backup) throws IOException {
if (backup.exists())
backup.delete();
if (!file.renameTo(backup)) {
FileOutputStream fos = null;
BufferedOutputStream bos = null;
FileInputStream fis = null;
try {
fos = new FileOutputStream(backup);
bos = new BufferedOutputStream(fos);
fis = new FileInputStream(file);
BufferedInputStream bis = new BufferedInputStream(fis);
byte[] bytes = new byte[8192];
int read;
while ((read = bis.read(bytes)) > -1) {
bos.write(bytes, 0, read);
}
}
finally {
try {
if (bos != null) {
bos.close();
}
} catch (Exception ignored) {}
try {
if (fos != null) {
fos.close();
}
} catch (Exception ignored) {}
try {
if (fis != null) {
fis.close();
}
} catch (Exception ignored) {}
}
}
}
private static class RootElementWriter implements XMLContentWriter {
private final HostModel hostModel;
private RootElementWriter(final HostModel hostModel) {
this.hostModel = hostModel;
}
@Override
public void writeContent(XMLExtendedStreamWriter streamWriter) throws XMLStreamException {
streamWriter.writeStartDocument();
streamWriter.writeStartElement(Element.HOST.getLocalName());
hostModel.writeContent(streamWriter);
streamWriter.writeEndDocument();
}
}
}