File OpenSearch/ConnectionPool/StaticConnectionPool.php

1:	<?php
2:
3:	declare(strict_types=1);
4:
5:	/**
6:	* Copyright OpenSearch Contributors
7:	* SPDX-License-Identifier: Apache-2.0
8:	*
9:	* OpenSearch PHP client
10:	*
11:	* @link https://github.com/opensearch-project/opensearch-php/
12:	* @copyright Copyright (c) Elasticsearch B.V (https://www.elastic.co)
13:	* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0
14:	* @license https://www.gnu.org/licenses/lgpl-2.1.html GNU Lesser General Public License, Version 2.1
15:	*
16:	* Licensed to Elasticsearch B.V under one or more agreements.
17:	* Elasticsearch B.V licenses this file to you under the Apache 2.0 License or
18:	* the GNU Lesser General Public License, Version 2.1, at your option.
19:	* See the LICENSE file in the project root for more information.
20:	*/
21:
22:	namespace OpenSearch\ConnectionPool;
23:
24:	use OpenSearch\Common\Exceptions\NoNodesAvailableException;
25:	use OpenSearch\ConnectionPool\Selectors\SelectorInterface;
26:	use OpenSearch\Connections\Connection;
27:	use OpenSearch\Connections\ConnectionFactoryInterface;
28:	use OpenSearch\Connections\ConnectionInterface;
29:
30:	// @phpstan-ignore classConstant.deprecatedClass
31:	@trigger_error(StaticConnectionPool::class . ' is deprecated in 2.4.0 and will be removed in 3.0.0.', E_USER_DEPRECATED);
32:
33:	/**
34:	* @deprecated in 2.4.0 and will be removed in 3.0.0.
35:	*
36:	* @phpstan-ignore class.extendsDeprecatedClass
37:	*/
38:	class StaticConnectionPool extends AbstractConnectionPool implements ConnectionPoolInterface
39:	{
40:	/**
41:	* @var int
42:	*/
43:	private $pingTimeout = 60;
44:
45:	/**
46:	* @var int
47:	*/
48:	private $maxPingTimeout = 3600;
49:
50:	/**
51:	* @param ConnectionInterface[] $connections
52:	* @param array<string, mixed> $connectionPoolParams
53:	*/
54:	public function __construct($connections, SelectorInterface $selector, ConnectionFactoryInterface $factory, $connectionPoolParams)
55:	{
56:	parent::__construct($connections, $selector, $factory, $connectionPoolParams);
57:	$this->scheduleCheck();
58:	}
59:
60:	public function nextConnection(bool $force = false): ConnectionInterface
61:	{
62:	$skipped = [];
63:
64:	$total = count($this->connections);
65:	while ($total--) {
66:	/**
67:	* @var Connection $connection
68:	*/
69:	$connection = $this->selector->select($this->connections);
70:	if ($connection->isAlive() === true) {
71:	return $connection;
72:	}
73:
74:	if ($this->readyToRevive($connection) === true) {
75:	if ($connection->ping() === true) {
76:	return $connection;
77:	}
78:	} else {
79:	$skipped[] = $connection;
80:	}
81:	}
82:
83:	// All "alive" nodes failed, force pings on "dead" nodes
84:	foreach ($skipped as $connection) {
85:	if ($connection->ping() === true) {
86:	return $connection;
87:	}
88:	}
89:
90:	throw new NoNodesAvailableException("No alive nodes found in your cluster");
91:	}
92:
93:	public function scheduleCheck(): void
94:	{
95:	foreach ($this->connections as $connection) {
96:	$connection->markDead();
97:	}
98:	}
99:
100:	private function readyToRevive(Connection $connection): bool
101:	{
102:	$timeout = min(
103:	$this->pingTimeout * pow(2, $connection->getPingFailures()),
104:	$this->maxPingTimeout
105:	);
106:
107:	if ($connection->getLastPing() + $timeout < time()) {
108:	return true;
109:	} else {
110:	return false;
111:	}
112:	}
113:	}
114:

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