/**
 * Copyright (C) 2014 Stratio (http://stratio.com)
 *
 * Licensed 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 com.stratio.ingestion.sink.elasticsearch.client;

import com.stratio.ingestion.sink.elasticsearch.IndexNameBuilder;
import org.apache.flume.Event;
import org.apache.flume.conf.Configurable;

/**
 * Interface for an ElasticSearch client which is responsible for sending bulks
 * of events to ElasticSearch.
 */
public interface ElasticSearchClient extends Configurable {

  /**
   * Close connection to elastic search in client
   */
  void close();

  /**
   * Add new event to the bulk
   *
   * @param event
   *    Flume Event
   * @param indexNameBuilder
   *    Index name builder which generates name of index to feed
   * @param indexType
   *    Name of type of document which will be sent to the elasticsearch cluster
   * @param ttlMs
   *    Time to live expressed in milliseconds. Value <= 0 is ignored
   * @throws Exception
   */
  public void addEvent(Event event, IndexNameBuilder indexNameBuilder,
      String indexType, long ttlMs) throws Exception;

  /**
   * Sends bulk to the elasticsearch cluster
   *
   * @throws Exception
   */
  void execute() throws Exception;
}
