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.webengine.jaxrs.tx;
020
021import java.io.IOException;
022
023import javax.servlet.FilterChain;
024import javax.servlet.FilterConfig;
025import javax.servlet.ServletException;
026import javax.servlet.http.HttpServletRequest;
027import javax.servlet.http.HttpServletResponse;
028
029import org.nuxeo.ecm.webengine.jaxrs.HttpFilter;
030import org.nuxeo.runtime.transaction.TransactionHelper;
031
032/**
033 * Filter using the {@link SimpleLoginModule} to authenticate a request.
034 *
035 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
036 */
037public class TransactionFilter extends HttpFilter {
038
039    @Override
040    public void init(FilterConfig filterConfig) throws ServletException {
041    }
042
043    @Override
044    public void run(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException,
045            ServletException {
046        boolean txStarted = false;
047        if (!TransactionHelper.isTransactionActive()) {
048            if (TransactionHelper.startTransaction()) {
049                txStarted = true;
050            }
051        }
052        try {
053            chain.doFilter(request, response);
054        } finally {
055            if (txStarted) {
056                TransactionHelper.commitOrRollbackTransaction();
057            }
058        }
059    }
060
061    @Override
062    public void destroy() {
063    }
064
065}