<?php

/*
* 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 Gelf\IMessagePublisher;
use Gelf\PublisherInterface;
use Gelf\Publisher;
use InvalidArgumentException;
use Monolog\Logger;
use Monolog\Formatter\GelfMessageFormatter;

/**
* Handler to send messages to a Graylog2 (http://www.graylog2.org) server
*
* @author Matt Lehner <mlehner@gmail.com>
* @author Benjamin Zikarsky <benjamin@zikarsky.de>
*/
class GelfHandler extends AbstractProcessingHandler
{
/**
* @var Publisher|PublisherInterface|IMessagePublisher the publisher object that sends the message to the server
*/
protected $publisher;

/**
* @param PublisherInterface|IMessagePublisher|Publisher $publisher a publisher object
* @param int $level The minimum logging level at which this handler will be triggered
* @param bool $bubble Whether the messages that are handled can bubble up the stack or not
*/
public function __construct($publisher, $level = Logger::DEBUG, $bubble = true)
{
parent::__construct($level, $bubble);

if (!$publisher instanceof Publisher && !$publisher instanceof IMessagePublisher && !$publisher instanceof PublisherInterface) {
throw new InvalidArgumentException('Invalid publisher, expected a Gelf\Publisher, Gelf\IMessagePublisher or Gelf\PublisherInterface instance');
}

$this->publisher = $publisher;
}

/**
* {@inheritdoc}
*/
protected function write(array $record)
{
$this->publisher->publish($record['formatted']);
}

/**
* {@inheritDoc}
*/
protected function getDefaultFormatter()
{
return new GelfMessageFormatter();
}
}