//
// ========================================================================
// Copyright (c) 1995-2017 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.memcached.session;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.List;
import org.eclipse.jetty.server.session.SessionContext;
import org.eclipse.jetty.server.session.SessionData;
import org.eclipse.jetty.server.session.SessionDataMap;
import org.eclipse.jetty.util.annotation.ManagedAttribute;
import org.eclipse.jetty.util.annotation.ManagedObject;
import org.eclipse.jetty.util.component.AbstractLifeCycle;
import net.rubyeye.xmemcached.MemcachedClient;
import net.rubyeye.xmemcached.XMemcachedClientBuilder;
/**
* MemcachedSessionDataMap
*
* Uses memcached as a cache for SessionData.
*/
@ManagedObject
public class MemcachedSessionDataMap extends AbstractLifeCycle implements SessionDataMap
{
public static final String DEFAULT_HOST = "localhost";
public static final String DEFAULT_PORT = "11211";
protected MemcachedClient _client;
protected int _expirySec = 0;
protected boolean _heartbeats = true;
protected XMemcachedClientBuilder _builder;
/**
* @param host address of memcache server
* @param port address of memcache server
*/
public MemcachedSessionDataMap(String host, String port)
{
if (host == null || port == null)
throw new IllegalArgumentException("Host: "+host+" port: "+port);
_builder = new XMemcachedClientBuilder(host+":"+port);
}
public MemcachedSessionDataMap (List<InetSocketAddress> addresses)
{
_builder = new XMemcachedClientBuilder(addresses);
}
public MemcachedSessionDataMap (List<InetSocketAddress> addresses, int[] weights)
{
_builder = new XMemcachedClientBuilder(addresses, weights);
}
/**
* @return the builder
*/
public XMemcachedClientBuilder getBuilder()
{
return _builder;
}
/**
* @param sec
*/
public void setExpirySec (int sec)
{
_expirySec = sec;
}
/**
* Expiry time for memached entries.
* @return memcached expiry time in sec
*/
@ManagedAttribute(value="memcached expiry time in sec", readonly=true)
public int getExpirySec ()
{
return _expirySec;
}
@ManagedAttribute(value="enable memcached heartbeats", readonly=true)
public boolean isHeartbeats()
{
return _heartbeats;
}
public void setHeartbeats(boolean heartbeats)
{
_heartbeats = heartbeats;
}
/**
* @see org.eclipse.jetty.server.session.SessionDataMap#initialize(org.eclipse.jetty.server.session.SessionContext)
*/
@Override
public void initialize(SessionContext context)
{
try
{
_client = _builder.build();
_client.setEnableHeartBeat(isHeartbeats());
}
catch (IOException e)
{
throw new IllegalStateException(e);
}
}
/**
* @see org.eclipse.jetty.server.session.SessionDataMap#load(java.lang.String)
*/
@Override
public SessionData load(String id) throws Exception
{
SessionData data = _client.get(id);
return data;
}
/**
* @see org.eclipse.jetty.server.session.SessionDataMap#store(java.lang.String, org.eclipse.jetty.server.session.SessionData)
*/
@Override
public void store(String id, SessionData data) throws Exception
{
_client.set(id, _expirySec, data);
}
/**
* @see org.eclipse.jetty.server.session.SessionDataMap#delete(java.lang.String)
*/
@Override
public boolean delete(String id) throws Exception
{
_client.delete(id);
return true; //delete returns false if the value didn't exist
}
@Override
protected void doStop() throws Exception
{
super.doStop();
if (_client != null)
{
_client.shutdown();
_client = null;
}
}
}