/*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) Alkacon Software GmbH (http://www.alkacon.com)
*
* This library 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 library 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.
*
* For further information about Alkacon Software GmbH, please see the
* company website: http://www.alkacon.com
*
* For further information about OpenCms, please see the
* project website: http://www.opencms.org
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.opencms.db;
import org.opencms.main.CmsLog;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import org.apache.commons.logging.Log;
/**
* Provides methods to write export points to the "real" file system.<p>
*
* @since 6.0.0
*/
public class CmsExportPointDriver {
/** The log object for this class. */
private static final Log LOG = CmsLog.getLog(CmsExportPointDriver.class);
/** The export points resolved to a lookup map. */
private Map<String, String> m_exportpointLookupMap;
/** The configured export points. */
private Set<CmsExportPoint> m_exportpoints;
/**
* Constructor for a CmsExportPointDriver.<p>
*
* @param exportpoints the list of export points
*/
public CmsExportPointDriver(Set<CmsExportPoint> exportpoints) {
m_exportpoints = exportpoints;
m_exportpointLookupMap = new HashMap<String, String>();
Iterator<CmsExportPoint> i = m_exportpoints.iterator();
while (i.hasNext()) {
CmsExportPoint point = i.next();
if (point.getDestinationPath() != null) {
// otherwise this point is not valid, but must be kept for serializing the configuration
m_exportpointLookupMap.put(point.getUri(), point.getDestinationPath());
}
}
}
/**
* If required, creates the folder with the given root path in the real file system.<p>
*
* @param resourceName the root path of the folder to create
* @param exportpoint the export point to create the folder in
*/
public void createFolder(String resourceName, String exportpoint) {
writeResource(resourceName, exportpoint, null);
}
/**
* Deletes a file or a folder in the real file sytem.<p>
*
* If the given resource name points to a folder, then this folder is only deleted if it is empty.
* This is required since the same export point RFS target folder may be used by multiple export points.
* For example, this is usually the case with the <code>/WEB-INF/classes/</code> and
* <code>/WEB-INF/lib/</code> folders which are export point for multiple modules.
* If all resources in the RFS target folder where deleted, uninstalling one module would delete the
* export <code>classes</code> and <code>lib</code> resources of all other modules.<p>
*
* @param resourceName the root path of the resource to be deleted
* @param exportpoint the name of the export point
*/
public void deleteResource(String resourceName, String exportpoint) {
File file = getExportPointFile(resourceName, exportpoint);
if (file.exists() && file.canWrite()) {
// delete the file (or folder)
file.delete();
// also delete empty parent directories
File parent = file.getParentFile();
if (parent.canWrite()) {
parent.delete();
}
}
}
/**
* Returns the export point path for the given resource root path,
* or <code>null</code> if the resource is not contained in
* any export point.<p>
*
* @param rootPath the root path of a resource in the OpenCms VFS
* @return the export point path for the given resource, or <code>null</code> if the resource is not contained in
* any export point
*/
public String getExportPoint(String rootPath) {
Iterator<String> i = getExportPointPaths().iterator();
while (i.hasNext()) {
String point = i.next();
if (rootPath.startsWith(point)) {
return point;
}
}
return null;
}
/**
* Returns the set of all VFS paths that are exported as an export point.<p>
*
* @return the set of all VFS paths that are exported as an export point
*/
public Set<String> getExportPointPaths() {
return m_exportpointLookupMap.keySet();
}
/**
* Writes the file with the given root path to the real file system.<p>
*
* If required, missing parent folders in the real file system are automatically created.<p>
*
* @param resourceName the root path of the file to write
* @param exportpoint the export point to write file to
* @param content the contents of the file to write
*/
public void writeFile(String resourceName, String exportpoint, byte[] content) {
writeResource(resourceName, exportpoint, content);
}
/**
* Returns the File for the given export point resource.<p>
*
* @param rootPath name of a file in the VFS
* @param exportpoint the name of the export point
* @return the File for the given export point resource
*/
private File getExportPointFile(String rootPath, String exportpoint) {
StringBuffer exportpath = new StringBuffer(128);
exportpath.append(m_exportpointLookupMap.get(exportpoint));
exportpath.append(rootPath.substring(exportpoint.length()));
return new File(exportpath.toString());
}
/**
* Writes (if required creates) a resource with the given name to the real file system.<p>
*
* @param resourceName the root path of the resource to write
* @param exportpoint the name of the export point
* @param content the contents of the file to write
*/
private void writeResource(String resourceName, String exportpoint, byte[] content) {
File file = getExportPointFile(resourceName, exportpoint);
try {
File folder;
if (content == null) {
// a folder is to be created
folder = file;
} else {
// a file is to be written
folder = file.getParentFile();
}
// make sure the parent folder exists
if (!folder.exists()) {
boolean success = folder.mkdirs();
if (!success) {
LOG.error(Messages.get().getBundle().key(
Messages.LOG_CREATE_FOLDER_FAILED_1,
folder.getAbsolutePath()));
}
}
if (content != null) {
// now write the file to the real file system
OutputStream s = new FileOutputStream(file);
s.write(content);
s.close();
}
} catch (Exception e) {
LOG.error(
Messages.get().getBundle().key(Messages.LOG_WRITE_EXPORT_POINT_FAILED_1, file.getAbsolutePath()),
e);
}
}
}