GuzzleHttp logger for whitemerry/phpkin

Logger.php

<?php

use whitemerry\phpkin\Logger\LoggerException;

class Logger extends whitemerry\phpkin\Logger\SimpleHttpLogger {
    /**
     * @inheritdoc
     */
    public function trace($spans)
    {
        global $log;
        $client = new GuzzleHttp\Client();
        $response = $client->post($this->options['host'] . $this->options['endpoint'], [
            'json' => $spans
        ]);

        $log->info(json_encode($spans));

        if (
            !$this->options['muteErrors'] &&
            $response->getStatusCode() != 202
        ) {
            throw new LoggerException('Trace upload failed');
        }
    }
}