001/*
002 * (C) Copyright 2016 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 *     "Guillaume Renard"
018 */
019
020package org.nuxeo.elasticsearch;
021
022import java.io.IOException;
023
024import javax.servlet.Filter;
025import javax.servlet.FilterChain;
026import javax.servlet.FilterConfig;
027import javax.servlet.ServletException;
028import javax.servlet.ServletRequest;
029import javax.servlet.ServletResponse;
030import javax.servlet.http.HttpServletRequest;
031
032import org.nuxeo.elasticsearch.listener.ElasticSearchInlineListener;
033
034/**
035 * @since 8.3
036 */
037public class ElasticSearchFilter implements Filter {
038
039    public static final String ES_SYNC_FLAG = "nx_es_sync";
040
041    @Override
042    public void init(FilterConfig filterConfig) throws ServletException {
043    }
044
045    @Override
046    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
047            throws IOException, ServletException {
048        if (request instanceof HttpServletRequest == false) {
049            chain.doFilter(request, response);
050            return;
051        }
052        final HttpServletRequest httpRequest = (HttpServletRequest) request;
053        final boolean esSync = Boolean.parseBoolean(httpRequest.getHeader(ES_SYNC_FLAG));
054        if (!esSync) {
055            chain.doFilter(request, response);
056            return;
057        }
058        ElasticSearchInlineListener.useSyncIndexing.set(true);
059        try {
060            chain.doFilter(request, response);
061        } finally {
062            ElasticSearchInlineListener.useSyncIndexing.set(false);
063        }
064    }
065
066    @Override
067    public void destroy() {
068    }
069
070}