AphrontRequestExceptionHandler.php
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	<?php

	/**
	* React to an unhandled exception escaping request handling in a controller
	* and convert it into a response.
	*
	* These handlers are generally used to render error pages, but they may
	* also perform more specialized handling in situations where an error page
	* is not appropriate.
	*/
	abstract class AphrontRequestExceptionHandler extends Phobject {

	abstract public function getRequestExceptionHandlerPriority();

	public function shouldLogException(
	AphrontRequest $request,
	Exception $ex) {
	return null;
	}

	abstract public function canHandleRequestException(
	AphrontRequest $request,
	Exception $ex);

	abstract public function handleRequestException(
	AphrontRequest $request,
	Exception $ex);

	final public static function getAllHandlers() {
	return id(new PhutilClassMapQuery())
	->setAncestorClass(__CLASS__)
	->setSortMethod('getRequestExceptionHandlerPriority')
	->execute();
	}

	}