1<?php 2/** 3 * Elasticsearch PHP client 4 * 5 * @link https://github.com/elastic/elasticsearch-php/ 6 * @copyright Copyright (c) Elasticsearch B.V (https://www.elastic.co) 7 * @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0 8 * @license https://www.gnu.org/licenses/lgpl-2.1.html GNU Lesser General Public License, Version 2.1 9 * 10 * Licensed to Elasticsearch B.V under one or more agreements. 11 * Elasticsearch B.V licenses this file to you under the Apache 2.0 License or 12 * the GNU Lesser General Public License, Version 2.1, at your option. 13 * See the LICENSE file in the project root for more information. 14 */ 15 16 17declare(strict_types = 1); 18 19namespace Elasticsearch\ConnectionPool\Selectors; 20 21use Elasticsearch\Connections\ConnectionInterface; 22 23class RoundRobinSelector implements SelectorInterface 24{ 25 /** 26 * @var int 27 */ 28 private $current = 0; 29 30 /** 31 * Select the next connection in the sequence 32 * 33 * @param ConnectionInterface[] $connections an array of ConnectionInterface instances to choose from 34 */ 35 public function select(array $connections): ConnectionInterface 36 { 37 $returnConnection = $connections[$this->current % count($connections)]; 38 39 $this->current += 1; 40 41 return $returnConnection; 42 } 43} 44