/*
* eXist Open Source Native XML Database
* Copyright (C) 2013 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.xquery.functions.system;
import org.exist.dom.QName;
import org.exist.storage.DBBroker;
import org.exist.storage.XQueryPool;
import org.exist.xquery.BasicFunction;
import org.exist.xquery.Cardinality;
import org.exist.xquery.FunctionSignature;
import org.exist.xquery.XPathException;
import org.exist.xquery.XQuery;
import org.exist.xquery.XQueryContext;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceType;
import org.exist.xquery.value.Type;
/**
* Clear XQuery Cache
*
* @author <a href="mailto:shabanovd@gmail.com">Dmitriy Shabanov</a>
*/
public class ClearXQueryCache extends BasicFunction {
public final static FunctionSignature signature = new FunctionSignature(
new QName("clear-xquery-cache", SystemModule.NAMESPACE_URI, SystemModule.PREFIX),
"Clear XQuery cache.",
FunctionSignature.NO_ARGS,
new SequenceType(Type.EMPTY, Cardinality.ZERO)
);
public ClearXQueryCache(XQueryContext context) {
super(context, signature);
}
@Override
public Sequence eval(Sequence[] args, Sequence contextSequence) throws XPathException {
if (!context.getSubject().hasDbaRole()) {
throw new XPathException(this, "Only DBA can call clear-xquery-cache function.");
}
final DBBroker broker = context.getBroker();
final XQuery xquery = broker.getXQueryService();
final XQueryPool pool = xquery.getXQueryPool();
pool.clear();
return Sequence.EMPTY_SEQUENCE;
}
}