/*
* Sonatype Nexus (TM) Open Source Version
* Copyright (c) 2007-2014 Sonatype, Inc.
* All rights reserved. Includes the third-party code listed at http://links.sonatype.com/products/nexus/oss/attributions.
*
* This program and the accompanying materials are made available under the terms of the Eclipse Public License Version 1.0,
* which accompanies this distribution and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Sonatype Nexus (TM) Professional Version is available from Sonatype, Inc. "Sonatype" and "Sonatype Nexus" are trademarks
* of Sonatype, Inc. Apache Maven is a trademark of the Apache Software Foundation. M2eclipse is a trademark of the
* Eclipse Foundation. All other trademarks are the property of their respective owners.
*/
package org.sonatype.nexus.configuration.application.upgrade;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
import java.util.Map;
import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;
import org.sonatype.configuration.upgrade.ConfigurationIsCorruptedException;
import org.sonatype.configuration.upgrade.SingleVersionUpgrader;
import org.sonatype.configuration.upgrade.UnsupportedConfigurationVersionException;
import org.sonatype.configuration.upgrade.UpgradeMessage;
import org.sonatype.nexus.configuration.model.Configuration;
import org.sonatype.sisu.goodies.common.ComponentSupport;
import org.codehaus.plexus.util.xml.Xpp3Dom;
import org.codehaus.plexus.util.xml.Xpp3DomBuilder;
import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* Default configuration updater, using versioned Modello models. It tried to detect version signature from existing
* file and apply apropriate modello io stuff to load configuration. It is also aware of changes across model versions.
*
* @author cstamas
*/
@Singleton
@Named
public class DefaultApplicationConfigurationUpgrader
extends ComponentSupport
implements ApplicationConfigurationUpgrader
{
private final Map<String, SingleVersionUpgrader> upgraders;
@Inject
public DefaultApplicationConfigurationUpgrader(final Map<String, SingleVersionUpgrader> upgraders) {
this.upgraders = checkNotNull(upgraders);
}
/**
* This implementation relies to plexus registered upgraders. It will cycle through them until the configuration is
* the needed (current) model version.
*/
@Override
public Configuration loadOldConfiguration(File file)
throws IOException,
ConfigurationIsCorruptedException,
UnsupportedConfigurationVersionException
{
// try to find out the model version
String modelVersion = null;
try {
Reader r = new FileReader(file);
Xpp3Dom dom = Xpp3DomBuilder.build(r);
modelVersion = dom.getChild("version").getValue();
}
catch (XmlPullParserException e) {
throw new ConfigurationIsCorruptedException(file.getAbsolutePath(), e);
}
if (Configuration.MODEL_VERSION.equals(modelVersion)) {
// we have a problem here, model version is OK but we could not load it previously?
throw new ConfigurationIsCorruptedException(file);
}
UpgradeMessage msg = new UpgradeMessage();
msg.setModelVersion(modelVersion);
// a correction for SWX
if ("1.0".equals(modelVersion)) {
msg.setModelVersion("1.0.0");
}
SingleVersionUpgrader upgrader = upgraders.get(msg.getModelVersion());
if (upgrader != null) {
log.debug(
"Upgrading old Nexus configuration file (version {}) at {}", msg.getModelVersion(),
file.getAbsolutePath());
msg.setConfiguration(upgrader.loadConfiguration(file));
while (!Configuration.MODEL_VERSION.equals(msg.getModelVersion())) {
if (upgrader != null) {
upgrader.upgrade(msg);
}
else {
// we could parse the XML but have no model version? Is this nexus config at all?
throw new UnsupportedConfigurationVersionException(modelVersion, file);
}
upgrader = upgraders.get(msg.getModelVersion());
}
log.info("Nexus configuration file upgraded to current version {} successfully., ", msg.getModelVersion());
return (Configuration) msg.getConfiguration();
}
else {
// we could parse the XML but have no model version? Is this nexus config at all?
throw new UnsupportedConfigurationVersionException(modelVersion, file);
}
}
}