001/*
002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     bstefanescu
018 */
019package org.nuxeo.ecm.platform.web.common;
020
021import java.io.IOException;
022
023import javax.servlet.FilterChain;
024import javax.servlet.ServletException;
025import javax.servlet.http.HttpFilter;
026import javax.servlet.http.HttpServletRequest;
027import javax.servlet.http.HttpServletResponse;
028
029/**
030 * Manage the context of the current HTTP request and made it available through a thread local variable to web
031 * components that are invoked inside the request.
032 *
033 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
034 */
035public class RequestContextFilter extends HttpFilter {
036
037    private static final long serialVersionUID = 1L;
038
039    @Override
040    public void doFilter(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
041            throws IOException, ServletException {
042        RequestContext ctx = new RequestContext(request, response);
043        try {
044            chain.doFilter(request, response);
045        } finally {
046            ctx.dispose();
047        }
048    }
049
050}