/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.webbeans.web.failover;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.apache.webbeans.config.WebBeansContext;
import org.apache.webbeans.spi.FailOverService;
/**
* {@link Filter} which handles the bean fail over.
* This extra {@link Filter} is required because
* {@link javax.servlet.ServletRequestListener#requestDestroyed(javax.servlet.ServletRequestEvent)}
* will be called after Tomcats session replication and is not in sync with the specs.
*/
public class FailOverFilter implements Filter
{
protected FailOverService failoverService;
/**
* Default constructor.
*/
public FailOverFilter()
{
WebBeansContext webBeansContext = WebBeansContext.currentInstance();
failoverService = webBeansContext.getService(FailOverService.class);
}
@Override
public void destroy()
{
//do nothing
}
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException
{
try
{
chain.doFilter(request, response);
}
finally
{
if (failoverService != null
&& failoverService.isSupportFailOver()
&& request instanceof HttpServletRequest)
{
HttpServletRequest httpRequest = (HttpServletRequest) request;
HttpSession session = httpRequest.getSession(false);
if (session != null)
{
failoverService.sessionIsIdle(session);
}
}
}
}
@Override
public void init(FilterConfig config) throws ServletException
{
//do nothing
}
}