/*
* 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.
*
* $Id: MailSessionFunctions.java 9745 2009-08-09 21:37:29Z ixitar $
*/
package org.exist.xquery.modules.memcached;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import net.spy.memcached.BinaryConnectionFactory;
import net.spy.memcached.MemcachedClient;
import org.apache.log4j.Logger;
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.modules.ModuleUtils;
import org.exist.xquery.value.FunctionParameterSequenceType;
import org.exist.xquery.value.FunctionReturnSequenceType;
import org.exist.xquery.value.IntegerValue;
import org.exist.xquery.value.NodeValue;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceIterator;
import org.exist.xquery.value.SequenceType;
import org.exist.xquery.value.Type;
public class MemcachedClientFunction extends BasicFunction
{
protected static final Logger logger = Logger.getLogger(MemcachedClientFunction.class);
public final static FunctionSignature signatures[] = {
new FunctionSignature(
new QName( "create-client", MemcachedModule.NAMESPACE_URI, MemcachedModule.PREFIX ),
"Create a Memcached client.",
new SequenceType[]
{
new FunctionParameterSequenceType( "properties", Type.ELEMENT, Cardinality.ONE_OR_MORE,
"A client properties in the form <properties><property name=\"\" value=\"\"/></properties>. " +
"Properties names are \"host\" and optional \"port\" (default port is 11211)."),
new FunctionParameterSequenceType( "type", Type.BOOLEAN, Cardinality.ZERO_OR_ONE,
"A type of memcached protocol, if true then binary version of protocol " +
"will be used. Default value is false.")
},
new FunctionReturnSequenceType( Type.LONG, Cardinality.EXACTLY_ONE, "an xs:long representing the client handle." )
)
};
public MemcachedClientFunction( XQueryContext context, FunctionSignature signature )
{
super( context, signature );
}
public Sequence eval( Sequence[] args, Sequence contextSequence ) throws XPathException
{
List <InetSocketAddress> ialist = new ArrayList <InetSocketAddress>();
SequenceIterator i = args[0].iterate();
do {
Properties props = ModuleUtils.parseProperties( ((NodeValue) i.nextItem()).getNode() );
String host = props.getProperty("host");
String tmp = props.getProperty("port");
int port = tmp == null ? 11211 : new Integer(tmp).intValue();
InetSocketAddress ia = new InetSocketAddress(host, port);
ialist.add(ia);
} while (i.hasNext());
boolean isbinary = args[1].isEmpty() ? false : new Boolean(args[1].itemAt(0).getStringValue());
MemcachedClient client;
try {
client = isbinary ? new MemcachedClient(new BinaryConnectionFactory(), ialist) : new MemcachedClient(ialist);
} catch (IOException e) {
throw new XPathException("Can't connect to memcahed server(s)");
}
// store the client and return the handle of the one.
IntegerValue integerValue = new IntegerValue( MemcachedModule.storeClient(client));
return integerValue;
}
}