/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-06 The eXist Project
* http://exist-db.org
*
* This program 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
* of the License, or (at your option) any later version.
*
* This program 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* $Id$
*/
package org.exist.http.webdav.methods;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.exist.EXistException;
import org.exist.collections.Collection;
import org.exist.collections.triggers.TriggerException;
import org.exist.dom.DocumentImpl;
import org.exist.security.PermissionDeniedException;
import org.exist.security.User;
import org.exist.storage.BrokerPool;
import org.exist.storage.DBBroker;
import org.exist.storage.lock.Lock;
import org.exist.storage.txn.TransactionManager;
import org.exist.storage.txn.Txn;
import org.exist.util.LockException;
import org.exist.xmldb.XmldbURI;
/**
* Implements the WebDAV UNLOCK method.
*
* @author Dannes Wessels
*/
public class Unlock extends AbstractWebDAVMethod {
/** Creates a new instance of Unlock */
public Unlock(BrokerPool pool) {
super(pool);
}
public void process(User user, HttpServletRequest request,
HttpServletResponse response, XmldbURI path)
throws ServletException, IOException {
DBBroker broker = null;
Collection collection = null;
DocumentImpl resource = null;
try {
broker = pool.get(user);
try {
try {
resource = broker.getXMLResource(path, org.exist.storage.lock.Lock.READ_LOCK);
} catch (PermissionDeniedException ex) {
response.sendError(HttpServletResponse.SC_FORBIDDEN, ex.getMessage());
LOG.error(ex);
return;
}
if(resource==null){
// No document found, maybe a collection
collection = broker.openCollection(path, org.exist.storage.lock.Lock.READ_LOCK);
try{
if(collection!=null){
LOG.info("Lock on collections not supported yet");
response.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED,
"Lock on collections not supported yet");
return;
} else {
LOG.info(NOT_FOUND_ERR + " " + path);
response.sendError(HttpServletResponse.SC_NOT_FOUND,
NOT_FOUND_ERR + " " + path);
return;
}
}finally{
if(collection != null)
collection.release(Lock.READ_LOCK);
}
}
User lock = resource.getUserLock();
if(lock==null){
// No lock found, can not be unlocked
LOG.debug("No lock found");
//clean up
resource.getMetadata().setLockToken(null);
response.sendError(HttpServletResponse.SC_NOT_FOUND);
return;
} else {
// Resource is locked.
LOG.info("Unlocking resource.");
boolean isNullResource=false;
if(resource.getMetadata().getLockToken().isNullResource() ){
isNullResource=true;
}
// Make it persistant
TransactionManager transact = pool.getTransactionManager();
Txn transaction = transact.beginTransaction();
// Remove if NullResource
if(isNullResource){
LOG.debug("Unlock NullResource");
try {
XmldbURI collUri = path.removeLastSegment();
collection = broker.openCollection(collUri, Lock.READ_LOCK);
//TODO : if the collection lock has been released
//Reacquire one here
if(resource.getResourceType() == DocumentImpl.BINARY_FILE)
collection.removeBinaryResource(transaction, broker, resource.getFileURI());
else
collection.removeXMLResource(transaction, broker, resource.getFileURI());
} catch (LockException ex) {
LOG.error(ex);
} catch (TriggerException ex) {
LOG.error(ex);
} catch (PermissionDeniedException ex) {
LOG.error(ex);
}
} else {
LOG.debug("Unlock resource");
resource.setUserLock(null);
resource.getMetadata().setLockToken(null);
broker.storeXMLResource(transaction, resource);
}
//Moved to the finally clause
//resource.getUpdateLock().release(Lock.READ_LOCK);
transact.commit(transaction);
LOG.debug("Sucessfully unlocked '"+path+"'.");
// Say OK
response.sendError(SC_UNLOCK_SUCCESSFULL, "Unlocked "+path);
}
} finally {
if (resource != null)
resource.getUpdateLock().release(Lock.READ_LOCK);
}
} catch (EXistException e) {
LOG.error(e);
response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e.getMessage());
throw new ServletException(e);
} finally {
if(collection != null){
collection.release(Lock.READ_LOCK);
}
if(pool != null){
pool.release(broker);
}
}
}
}