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<?php declare(strict_types=1);
/*
* This file is part of the Monolog package.
*
* (c) Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Monolog\Handler;
use Elastic\Elasticsearch\Response\Elasticsearch;
use Throwable;
use RuntimeException;
use Monolog\Logger;
use Monolog\Formatter\FormatterInterface;
use Monolog\Formatter\ElasticsearchFormatter;
use InvalidArgumentException;
use Elasticsearch\Common\Exceptions\RuntimeException as ElasticsearchRuntimeException;
use Elasticsearch\Client;
use Elastic\Elasticsearch\Exception\InvalidArgumentException as ElasticInvalidArgumentException;
use Elastic\Elasticsearch\Client as Client8;
/**
* Elasticsearch handler
*
* @link https://www.elastic.co/guide/en/elasticsearch/client/php-api/current/index.html
*
* Simple usage example:
*
* $client = \Elasticsearch\ClientBuilder::create()
* ->setHosts($hosts)
* ->build();
*
* $options = array(
* 'index' => 'elastic_index_name',
* 'type' => 'elastic_doc_type',
* );
* $handler = new ElasticsearchHandler($client, $options);
* $log = new Logger('application');
* $log->pushHandler($handler);
*
* @author Avtandil Kikabidze <akalongman@gmail.com>
*/
class ElasticsearchHandler extends AbstractProcessingHandler
{
/**
* @var Client|Client8
*/
protected $client;
/**
* @var mixed[] Handler config options
*/
protected $options = [];
/**
* @var bool
*/
private $needsType;
/**
* @param Client|Client8 $client Elasticsearch Client object
* @param mixed[] $options Handler configuration
*/
public function __construct($client, array $options = [], $level = Logger::DEBUG, bool $bubble = true)
{
if (!$client instanceof Client && !$client instanceof Client8) {
throw new \TypeError('Elasticsearch\Client or Elastic\Elasticsearch\Client instance required');
}
parent::__construct($level, $bubble);
$this->client = $client;
$this->options = array_merge(
[
'index' => 'monolog', // Elastic index name
'type' => '_doc', // Elastic document type
'ignore_error' => false, // Suppress Elasticsearch exceptions
],
$options
);
if ($client instanceof Client8 || $client::VERSION[0] === '7') {
$this->needsType = false;
// force the type to _doc for ES8/ES7
$this->options['type'] = '_doc';
} else {
$this->needsType = true;
}
}
/**
* {@inheritDoc}
*/
protected function write(array $record): void
{
$this->bulkSend([$record['formatted']]);
}
/**
* {@inheritDoc}
*/
public function setFormatter(FormatterInterface $formatter): HandlerInterface
{
if ($formatter instanceof ElasticsearchFormatter) {
return parent::setFormatter($formatter);
}
throw new InvalidArgumentException('ElasticsearchHandler is only compatible with ElasticsearchFormatter');
}
/**
* Getter options
*
* @return mixed[]
*/
public function getOptions(): array
{
return $this->options;
}
/**
* {@inheritDoc}
*/
protected function getDefaultFormatter(): FormatterInterface
{
return new ElasticsearchFormatter($this->options['index'], $this->options['type']);
}
/**
* {@inheritDoc}
*/
public function handleBatch(array $records): void
{
$documents = $this->getFormatter()->formatBatch($records);
$this->bulkSend($documents);
}
/**
* Use Elasticsearch bulk API to send list of documents
*
* @param array[] $records Records + _index/_type keys
* @throws \RuntimeException
*/
protected function bulkSend(array $records): void
{
try {
$params = [
'body' => [],
];
foreach ($records as $record) {
$params['body'][] = [
'index' => $this->needsType ? [
'_index' => $record['_index'],
'_type' => $record['_type'],
] : [
'_index' => $record['_index'],
],
];
unset($record['_index'], $record['_type']);
$params['body'][] = $record;
}
/** @var Elasticsearch */
$responses = $this->client->bulk($params);
if ($responses['errors'] === true) {
throw $this->createExceptionFromResponses($responses);
}
} catch (Throwable $e) {
if (! $this->options['ignore_error']) {
throw new RuntimeException('Error sending messages to Elasticsearch', 0, $e);
}
}
}
/**
* Creates elasticsearch exception from responses array
*
* Only the first error is converted into an exception.
*
* @param mixed[]|Elasticsearch $responses returned by $this->client->bulk()
*/
protected function createExceptionFromResponses($responses): Throwable
{
foreach ($responses['items'] ?? [] as $item) {
if (isset($item['index']['error'])) {
return $this->createExceptionFromError($item['index']['error']);
}
}
if (class_exists(ElasticInvalidArgumentException::class)) {
return new ElasticInvalidArgumentException('Elasticsearch failed to index one or more records.');
}
return new ElasticsearchRuntimeException('Elasticsearch failed to index one or more records.');
}
/**
* Creates elasticsearch exception from error array
*
* @param mixed[] $error
*/
protected function createExceptionFromError(array $error): Throwable
{
$previous = isset($error['caused_by']) ? $this->createExceptionFromError($error['caused_by']) : null;
if (class_exists(ElasticInvalidArgumentException::class)) {
return new ElasticInvalidArgumentException($error['type'] . ': ' . $error['reason'], 0, $previous);
}
return new ElasticsearchRuntimeException($error['type'] . ': ' . $error['reason'], 0, $previous);
}
}
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