001/*
002 * (C) Copyright 2015 Nuxeo SA (http://nuxeo.com/) and contributors.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the GNU Lesser General Public License
006 * (LGPL) version 2.1 which accompanies this distribution, and is available at
007 * http://www.gnu.org/licenses/lgpl-2.1.html
008 *
009 * This library is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * Contributors:
015 *     <a href="mailto:grenard@nuxeo.com">Guillaume Renard</a>
016 *
017 */
018
019package org.nuxeo.elasticsearch.http.readonly.service;
020
021import java.util.Map;
022import java.util.concurrent.ConcurrentHashMap;
023
024import org.apache.commons.logging.Log;
025import org.apache.commons.logging.LogFactory;
026import org.nuxeo.elasticsearch.http.readonly.filter.SearchRequestFilter;
027import org.nuxeo.runtime.model.ComponentContext;
028import org.nuxeo.runtime.model.ComponentInstance;
029import org.nuxeo.runtime.model.ComponentName;
030import org.nuxeo.runtime.model.DefaultComponent;
031
032/**
033 * @since 7.4
034 */
035public class RequestFilterService extends DefaultComponent {
036
037    public static final ComponentName NAME = new ComponentName(ComponentName.DEFAULT_TYPE,
038            "org.nuxeo.elasticsearch.http.readonly.RequestFilterService");
039
040    private static final Log log = LogFactory.getLog(RequestFilterService.class);
041
042    protected static final String FILTER_EXT_POINT = "filters";
043
044    protected Map<String, Class> requestFilters;
045
046    @Override
047    public void activate(ComponentContext context) {
048        requestFilters = new ConcurrentHashMap<String, Class>();
049    }
050
051    @Override
052    public void deactivate(ComponentContext context) {
053        requestFilters.clear();
054        requestFilters = null;
055    }
056
057    public Map<String, Class> getRequestFilters() {
058        return requestFilters;
059
060    }
061
062    public SearchRequestFilter getRequestFilters(String indices) throws InstantiationException, IllegalAccessException {
063        Class clazz = requestFilters.get(indices);
064        if (clazz == null) {
065            return null;
066        }
067        return (SearchRequestFilter) clazz.newInstance();
068    }
069
070    @Override
071    public void registerContribution(Object contribution, String extensionPoint, ComponentInstance contributor) {
072        if (FILTER_EXT_POINT.equals(extensionPoint)) {
073            RequestFilterDescriptor des = (RequestFilterDescriptor) contribution;
074            requestFilters.put(des.getIndex(), des.getFilterClass());
075            log.info("Registered filter: " + des.getFilterClass() + " for index " + des.getIndex());
076        }
077    }
078
079    @Override
080    public void unregisterContribution(Object contribution, String extensionPoint, ComponentInstance contributor) {
081        if (FILTER_EXT_POINT.equals(extensionPoint)) {
082            RequestFilterDescriptor des = (RequestFilterDescriptor) contribution;
083            Class filter = requestFilters.remove(des.getIndex());
084            if (filter != null) {
085                log.info("Unregistered filter: " + filter + " for index " + des.getIndex());
086            }
087        }
088    }
089
090}