| /* |
| * 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.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.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * An {@link ElasticFacetProvider} that subscribes to Elastic Aggregation events. |
| * The provider is async: {@code getFacets} waits until the aggregation is read or for a max of 15 seconds. In the latter |
| * case, an {@link IllegalStateException} is thrown. |
| */ |
| class ElasticInsecureFacetAsyncProvider implements ElasticFacetProvider, ElasticResponseListener.AggregationListener { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(ElasticInsecureFacetAsyncProvider.class); |
| |
| private Map<String, ElasticResponseHandler.AggregationBuckets> aggregations; |
| |
| private final CountDownLatch latch = new CountDownLatch(1); |
| |
| @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 aggregations {}", columnName, aggregations); |
| if (aggregations != null) { |
| final String facetProp = FulltextIndex.parseFacetField(columnName); |
| ElasticResponseHandler.AggregationBuckets terms = aggregations.get(facetProp); |
| List<FulltextIndex.Facet> facets = new ArrayList<>(terms.buckets.length); |
| for (ElasticResponseHandler.AggregationBucket bucket : terms.buckets) { |
| facets.add(new FulltextIndex.Facet(bucket.key.toString(), bucket.count)); |
| } |
| return facets; |
| } else return null; |
| } |
| |
| @Override |
| public void on(Map<String, ElasticResponseHandler.AggregationBuckets> aggregations) { |
| this.aggregations = aggregations; |
| this.endData(); |
| } |
| |
| @Override |
| public void endData() { |
| latch.countDown(); |
| } |
| } |