| /* |
| * 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; |
| |
| import org.apache.jackrabbit.oak.plugins.index.elastic.query.ElasticResponseHandler; |
| import org.apache.jackrabbit.oak.plugins.index.search.FieldNames; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * Generic listener of Elastic response |
| */ |
| public interface ElasticResponseListener { |
| |
| Set<String> DEFAULT_SOURCE_FIELDS = Collections.singleton(FieldNames.PATH); |
| |
| /** |
| * Returns the source fields this listener is interested on |
| * |
| * @return the list of fields to listen to (only PATH as default) |
| */ |
| default Set<String> sourceFields() { |
| return DEFAULT_SOURCE_FIELDS; |
| } |
| |
| /** |
| * This method is invoked when there is no more data to process. |
| */ |
| void endData(); |
| |
| /** |
| * {@link ElasticResponseListener} extension to subscribe on response hit events |
| */ |
| interface SearchHitListener extends ElasticResponseListener { |
| |
| /** |
| * Returns {@code true} if the listener is interested in the entire result set |
| */ |
| default boolean isFullScan() { |
| return false; |
| } |
| |
| /** |
| * This method is invoked at the beginning of the listener lifecycle to notify the number of hits this |
| * listener could receive |
| * @param totalHits the total number of hits |
| */ |
| default void startData(long totalHits) { /*empty*/ } |
| |
| /** |
| * This method is called for each {@link ElasticResponseHandler.SearchResponseHit} retrieved |
| */ |
| void on(ElasticResponseHandler.SearchResponseHit searchHit); |
| } |
| |
| /** |
| * {@link ElasticResponseListener} extension to subscribe on aggregations events |
| */ |
| interface AggregationListener extends ElasticResponseListener { |
| |
| /** |
| * This method is called once when the aggregations are retrieved |
| * @param aggregations the {@link Map} with aggregations or {@code null} if there are no results |
| */ |
| void on(Map<String, ElasticResponseHandler.AggregationBuckets> aggregations); |
| } |
| } |