/*
* Copyright (C) 2011 eXo Platform SAS.
*
* 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.exoplatform.services.jcr.impl.core.query.lucene;
import org.exoplatform.services.rpc.RPCException;
import org.exoplatform.services.rpc.RPCService;
import org.exoplatform.services.rpc.RemoteCommand;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.io.Serializable;
import javax.jcr.RepositoryException;
/**
* Filter asks coordinator for the number of documents in it's index. Returns true
* is it differs with local index.
*
* @author <a href="mailto:nzamosenchuk@exoplatform.com">Nikolay Zamosenchul</a>
* @version $Id: DocNumberRecoveryFilter.java 34360 2009-07-22 23:58:59Z nzamosenchuk $
*/
public class DocNumberRecoveryFilter extends AbstractRecoveryFilter
{
private static final Logger log = LoggerFactory.getLogger("exo.jcr.component.core.index.DocNumberRecoveryFilter");
protected RemoteCommand getDocsNumCommand;
protected RPCService rpcService;
/**
* @param searchIndex
*/
public DocNumberRecoveryFilter(SearchIndex searchIndex)
{
super(searchIndex);
rpcService = context.getRPCService();
getDocsNumCommand = rpcService.registerCommand(new RemoteCommand()
{
public String getId()
{
return "org.exoplatform.services.jcr.impl.core.query.lucene.DocNumberRecoveryFilter-getDocNum-"
+ DocNumberRecoveryFilter.this.searchIndex.getWsId() + "-"
+ (DocNumberRecoveryFilter.this.searchIndex.getContext().getParentHandler() == null);
}
public Serializable execute(Serializable[] args) throws Throwable
{
log.info("Remote command invoked");
return Integer.valueOf(DocNumberRecoveryFilter.this.searchIndex.getIndex().numDocs());
}
});
}
/**
* {@inheritDoc}
*/
@Override
public boolean accept() throws RepositoryException
{
try
{
if (!rpcService.isCoordinator())
{
Integer docsNumber = (Integer)rpcService.executeCommandOnCoordinator(getDocsNumCommand, true);
log.info("Remote result received: " + docsNumber + " and local is: " + searchIndex.getIndex().numDocs());
return docsNumber.intValue() != searchIndex.getIndex().numDocs();
}
// if current node is coordinator
return false;
}
catch (SecurityException e)
{
throw new RepositoryException(e.getMessage(), e);
}
catch (RPCException e)
{
throw new RepositoryException(e.getMessage(), e);
}
catch (IOException e)
{
throw new RepositoryException(e.getMessage(), e);
}
}
@Override
public void close()
{
rpcService.unregisterCommand(getDocsNumCommand);
super.close();
}
}