content: /**
   * 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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.janusgraph.diskstorage.es;
  
  import org.janusgraph.diskstorage.BackendException;
  import org.janusgraph.diskstorage.configuration.Configuration;
  import org.janusgraph.graphdb.configuration.PreInitializeConfigOptions;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.lang.reflect.Field;
  
  /**
   * NOTE: Class to get access to ElasticSearchIndex.client
   */
  
  @PreInitializeConfigOptions
  public class ElasticSearch7Index extends ElasticSearchIndex {
      private static final Logger LOG = LoggerFactory.getLogger(ElasticSearch7Index.class);
  
      private static ElasticSearch7Index instance;
  
      private final ElasticSearchClient client;
  
      public ElasticSearch7Index(Configuration config) throws BackendException {
          super(config);
  
          ElasticSearchClient client = null;
  
          try {
              Field fld = ElasticSearchIndex.class.getDeclaredField("client");
  
              fld.setAccessible(true);
  
              client = (ElasticSearchClient) fld.get(this);
          } catch (Exception excp) {
              LOG.warn("Failed to get SolrClient", excp);
          }
  
          this.client = client;
  
          ElasticSearch7Index.instance = this;
      }
  
      public static ElasticSearchClient getElasticSearchClient() {
          ElasticSearch7Index index = ElasticSearch7Index.instance;
  
          return index != null ? index.client : null;
      }
  }
  