<?php declare(strict_types=1);
/*
* This file is part of the Monolog package.
*
* (c) Jordi Boggiano <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Monolog\Handler;
use Monolog\Formatter\LineFormatter;
use Monolog\Formatter\FormatterInterface;
use Monolog\Logger;
/**
* Logs to a Redis key using rpush
*
* usage example:
*
* $log = new Logger('application');
* $redis = new RedisHandler(new Predis\Client("tcp://localhost:6379"), "logs", "prod");
* $log->pushHandler($redis);
*
* @author Thomas Tourlourat <[email protected]>
*/
class RedisHandler extends AbstractProcessingHandler
{
private $redisClient;
private $redisKey;
protected $capSize;
/**
* @param \Predis\Client|\Redis $redis The redis instance
* @param string $key The key name to push records to
* @param string|int $level The minimum logging level at which this handler will be triggered
* @param bool $bubble Whether the messages that are handled can bubble up the stack or not
* @param int $capSize Number of entries to limit list size to, 0 = unlimited
*/
public function __construct($redis, string $key, $level = Logger::DEBUG, bool $bubble = true, int $capSize = 0)
{
if (!(($redis instanceof \Predis\Client) || ($redis instanceof \Redis))) {
throw new \InvalidArgumentException('Predis\Client or Redis instance required');
}
$this->redisClient = $redis;
$this->redisKey = $key;
$this->capSize = $capSize;
parent::__construct($level, $bubble);
}
/**
* {@inheritDoc}
*/
protected function write(array $record): void
{
if ($this->capSize) {
$this->writeCapped($record);
} else {
$this->redisClient->rpush($this->redisKey, $record["formatted"]);
}
}
/**
* Write and cap the collection
* Writes the record to the redis list and caps its
*/
protected function writeCapped(array $record): void
{
if ($this->redisClient instanceof \Redis) {
$mode = defined('\Redis::MULTI') ? \Redis::MULTI : 1;
$this->redisClient->multi($mode)
->rpush($this->redisKey, $record["formatted"])
->ltrim($this->redisKey, -$this->capSize, -1)
->exec();
} else {
$redisKey = $this->redisKey;
$capSize = $this->capSize;
$this->redisClient->transaction(function ($tx) use ($record, $redisKey, $capSize) {
$tx->rpush($redisKey, $record["formatted"]);
$tx->ltrim($redisKey, -$capSize, -1);
});
}
}
/**
* {@inheritDoc}
*/
protected function getDefaultFormatter(): FormatterInterface
{
return new LineFormatter();
}
}