| /** |
| * 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.metamodel.elasticsearch.nativeclient; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.metamodel.MetaModelException; |
| import org.apache.metamodel.delete.AbstractRowDeletionBuilder; |
| import org.apache.metamodel.delete.RowDeletionBuilder; |
| import org.apache.metamodel.elasticsearch.common.ElasticSearchUtils; |
| import org.apache.metamodel.query.FilterItem; |
| import org.apache.metamodel.query.LogicalOperator; |
| import org.apache.metamodel.schema.Table; |
| import org.elasticsearch.action.delete.DeleteResponse; |
| import org.elasticsearch.action.search.SearchResponse; |
| import org.elasticsearch.client.Client; |
| import org.elasticsearch.index.query.QueryBuilder; |
| import org.elasticsearch.search.SearchHit; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * {@link RowDeletionBuilder} implementation for |
| * {@link ElasticSearchDataContext}. |
| */ |
| final class ElasticSearchDeleteBuilder extends AbstractRowDeletionBuilder { |
| |
| private static final Logger logger = LoggerFactory.getLogger(ElasticSearchDeleteBuilder.class); |
| |
| private final ElasticSearchUpdateCallback _updateCallback; |
| |
| public ElasticSearchDeleteBuilder(ElasticSearchUpdateCallback updateCallback, Table table) { |
| super(table); |
| _updateCallback = updateCallback; |
| } |
| |
| @Override |
| public void execute() throws MetaModelException { |
| final Table table = getTable(); |
| final String documentType = table.getName(); |
| |
| final ElasticSearchDataContext dataContext = _updateCallback.getDataContext(); |
| final Client client = dataContext.getElasticSearchClient(); |
| final String indexName = dataContext.getIndexName(); |
| |
| final List<FilterItem> whereItems = getWhereItems(); |
| |
| // delete by query - note that creteQueryBuilderForSimpleWhere may |
| // return matchAllQuery() if no where items are present. |
| final QueryBuilder queryBuilder = ElasticSearchUtils.createQueryBuilderForSimpleWhere(whereItems, |
| LogicalOperator.AND); |
| if (queryBuilder == null) { |
| // TODO: The where items could not be pushed down to a query. We |
| // could solve this by running a query first, gather all |
| // document IDs and then delete by IDs. |
| throw new UnsupportedOperationException("Could not push down WHERE items to delete by query request: " |
| + whereItems); |
| } |
| |
| final SearchResponse response = |
| client.prepareSearch(indexName).setQuery(queryBuilder).setTypes(documentType).execute() |
| .actionGet(); |
| |
| client.admin().indices().prepareRefresh(indexName).execute().actionGet(); |
| final Iterator<SearchHit> iterator = response.getHits().iterator(); |
| while (iterator.hasNext()) { |
| final SearchHit hit = iterator.next(); |
| final String typeId = hit.getId(); |
| final DeleteResponse deleteResponse = |
| client.prepareDelete().setIndex(indexName).setType(documentType).setId(typeId).execute() |
| .actionGet(); |
| logger.debug("Deleted documents by query." + deleteResponse.getResult()); |
| } |
| client.admin().indices().prepareRefresh(indexName).execute().actionGet(); |
| } |
| } |