| /* |
| * 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.jackrabbit.oak.plugins.index.elastic.query.async.facets; |
| |
| import org.apache.jackrabbit.oak.plugins.index.elastic.query.ElasticRequestHandler; |
| import org.apache.jackrabbit.oak.plugins.index.elastic.query.ElasticResponseHandler; |
| import org.apache.jackrabbit.oak.plugins.index.elastic.query.async.ElasticResponseListener; |
| import org.apache.jackrabbit.oak.plugins.index.search.spi.query.FulltextIndex; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| import java.util.function.Predicate; |
| import java.util.stream.Collectors; |
| |
| /** |
| * An {@link ElasticFacetProvider} that subscribes to Elastic SearchHit events to return only accessible facets. |
| */ |
| class ElasticSecureFacetAsyncProvider implements ElasticFacetProvider, ElasticResponseListener.SearchHitListener { |
| |
| protected static final Logger LOG = LoggerFactory.getLogger(ElasticSecureFacetAsyncProvider.class); |
| |
| protected final Set<String> facetFields; |
| private final Map<String, Map<String, Integer>> facetsMap = new ConcurrentHashMap<>(); |
| private Map<String, List<FulltextIndex.Facet>> facets; |
| protected final ElasticResponseHandler elasticResponseHandler; |
| protected final Predicate<String> isAccessible; |
| |
| private final CountDownLatch latch = new CountDownLatch(1); |
| |
| ElasticSecureFacetAsyncProvider( |
| ElasticRequestHandler elasticRequestHandler, |
| ElasticResponseHandler elasticResponseHandler, |
| Predicate<String> isAccessible |
| ) { |
| this.elasticResponseHandler = elasticResponseHandler; |
| this.isAccessible = isAccessible; |
| this.facetFields = elasticRequestHandler.facetFields().collect(Collectors.toSet()); |
| } |
| |
| @Override |
| public Set<String> sourceFields() { |
| return facetFields; |
| } |
| |
| @Override |
| public boolean isFullScan() { |
| return true; |
| } |
| |
| @Override |
| public void on(ElasticResponseHandler.SearchResponseHit searchHit) { |
| final String path = elasticResponseHandler.getPath(searchHit); |
| if (path != null && isAccessible.test(path)) { |
| for (String field: facetFields) { |
| Object value = searchHit.source.get(field); |
| if (value != null) { |
| facetsMap.compute(field, (column, facetValues) -> { |
| if (facetValues == null) { |
| Map<String, Integer> values = new HashMap<>(); |
| values.put(value.toString(), 1); |
| return values; |
| } else { |
| facetValues.merge(value.toString(), 1, Integer::sum); |
| return facetValues; |
| } |
| }); |
| } |
| } |
| } |
| } |
| |
| @Override |
| public void endData() { |
| // create Facet objects, order by count (desc) and then by label (asc) |
| facets = facetsMap.entrySet() |
| .stream() |
| .collect(Collectors.toMap |
| (Map.Entry::getKey, x -> x.getValue().entrySet() |
| .stream() |
| .map(e -> new FulltextIndex.Facet(e.getKey(), e.getValue())) |
| .sorted((f1, f2) -> { |
| int f1Count = f1.getCount(); |
| int f2Count = f2.getCount(); |
| if (f1Count == f2Count) { |
| return f1.getLabel().compareTo(f2.getLabel()); |
| } else return f2Count - f1Count; |
| }) |
| .collect(Collectors.toList()) |
| ) |
| ); |
| LOG.trace("End data {}", facetsMap); |
| latch.countDown(); |
| } |
| |
| @Override |
| public List<FulltextIndex.Facet> getFacets(int numberOfFacets, String columnName) { |
| LOG.trace("Requested facets for {} - Latch count: {}", columnName, latch.getCount()); |
| try { |
| latch.await(15, TimeUnit.SECONDS); |
| } catch (InterruptedException e) { |
| throw new IllegalStateException("Error while waiting for facets", e); |
| } |
| LOG.trace("Reading facets for {} from {}", columnName, facets); |
| return facets != null ? facets.get(FulltextIndex.parseFacetField(columnName)) : null; |
| } |
| } |