SamplingHandler.php

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<?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;

class SamplingHandler extends AbstractHandler
{
    protected $handler;

    protected $factor;

    public function __construct($handler, $factor)
    {
        parent::__construct();
        $this->handler = $handler;
        $this->factor = $factor;

        if (!$this->handler instanceof HandlerInterface && !is_callable($this->handler)) {
            throw new \RuntimeException("The given handler (".json_encode($this->handler).") is not a callable nor a Monolog\Handler\HandlerInterface object");
        }
    }

    public function isHandling(array $record)
    {
        return $this->handler->isHandling($record);
    }

    public function handle(array $record)
    {
        if ($this->isHandling($record) && mt_rand(1, $this->factor) === 1) {
            // The same logic as in FingersCrossedHandler
            if (!$this->handler instanceof HandlerInterface) {
                $this->handler = call_user_func($this->handler, $record, $this);
                if (!$this->handler instanceof HandlerInterface) {
                    throw new \RuntimeException("The factory callable should return a HandlerInterface");
                }
            }

            if ($this->processors) {
                foreach ($this->processors as $processor) {
                    $record = call_user_func($processor, $record);
                }
            }

            $this->handler->handle($record);
        }

        return false === $this->bubble;
    }
}