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<?php

/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/

namespace Symfony\Component\HttpKernel;

/**
* Contains all events thrown in the HttpKernel component
*
* @author Bernhard Schussek <bernhard.schussek@symfony.com>
*
* @api
*/
final class KernelEvents
{
    /**
* The REQUEST event occurs at the very beginning of request
* dispatching
*
* This event allows you to create a response for a request before any
* other code in the framework is executed. The event listener method
* receives a Symfony\Component\HttpKernel\Event\GetResponseEvent
* instance.
*
* @var string
*
* @api
*/
    const REQUEST = 'kernel.request';

    /**
* The EXCEPTION event occurs when an uncaught exception appears
*
* This event allows you to create a response for a thrown exception or
* to modify the thrown exception. The event listener method receives
* a Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent
* instance.
*
* @var string
*
* @api
*/
    const EXCEPTION = 'kernel.exception';

    /**
* The VIEW event occurs when the return value of a controller
* is not a Response instance
*
* This event allows you to create a response for the return value of the
* controller. The event listener method receives a
* Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent
* instance.
*
* @var string
*
* @api
*/
    const VIEW = 'kernel.view';

    /**
* The CONTROLLER event occurs once a controller was found for
* handling a request
*
* This event allows you to change the controller that will handle the
* request. The event listener method receives a
* Symfony\Component\HttpKernel\Event\FilterControllerEvent instance.
*
* @var string
*
* @api
*/
    const CONTROLLER = 'kernel.controller';

    /**
* The RESPONSE event occurs once a response was created for
* replying to a request
*
* This event allows you to modify or replace the response that will be
* replied. The event listener method receives a
* Symfony\Component\HttpKernel\Event\FilterResponseEvent instance.
*
* @var string
*
* @api
*/
    const RESPONSE = 'kernel.response';
}
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