/*
* 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 program; if not, write to the Free Software Foundation
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
package org.exist.xquery.modules.memcached;
import net.spy.memcached.MemcachedClient;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.LogManager;
import org.exist.dom.QName;
import org.exist.xquery.BasicFunction;
import org.exist.xquery.Cardinality;
import org.exist.xquery.FunctionSignature;
import org.exist.xquery.XPathException;
import org.exist.xquery.XQueryContext;
import org.exist.xquery.value.FunctionParameterSequenceType;
import org.exist.xquery.value.IntegerValue;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceType;
import org.exist.xquery.value.Type;
public class MemcachedDeleteFunction extends BasicFunction
{
protected static final Logger logger = LogManager.getLogger(MemcachedDeleteFunction.class);
public final static FunctionSignature signatures[] = {
new FunctionSignature(
new QName( "delete", MemcachedModule.NAMESPACE_URI, MemcachedModule.PREFIX ),
"Delete data from Memcached server by key.",
new SequenceType[]
{
new FunctionParameterSequenceType( "client", Type.LONG, Cardinality.EXACTLY_ONE,
"The memcached client handle."),
new FunctionParameterSequenceType( "key", Type.STRING, Cardinality.EXACTLY_ONE,
"The key to delete.")
},
new SequenceType(Type.EMPTY, Cardinality.EMPTY)
)
};
public MemcachedDeleteFunction( XQueryContext context, FunctionSignature signature )
{
super( context, signature );
}
public Sequence eval( Sequence[] args, Sequence contextSequence ) throws XPathException
{
long clientHandle = ((IntegerValue) args[0].itemAt(0)).getLong();
MemcachedClient client = MemcachedModule.retrieveClient(clientHandle);
String key = args[1].itemAt(0).getStringValue();
client.delete(key);
return Sequence.EMPTY_SEQUENCE;
}
}