PhabricatorClusterExceptionHandler.php
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	<?php

	final class PhabricatorClusterExceptionHandler
	extends PhabricatorRequestExceptionHandler {

	public function getRequestExceptionHandlerPriority() {
	return 300000;
	}

	public function getRequestExceptionHandlerDescription() {
	return pht('Handles runtime problems with cluster configuration.');
	}

	public function canHandleRequestException(
	AphrontRequest $request,
	Exception $ex) {
	return ($ex instanceof PhabricatorClusterException);
	}

	public function handleRequestException(
	AphrontRequest $request,
	Exception $ex) {

	$viewer = $this->getViewer($request);

	$title = $ex->getExceptionTitle();

	$dialog = id(new AphrontDialogView())
	->setTitle($title)
	->setUser($viewer)
	->appendParagraph($ex->getMessage())
	->addCancelButton('/', pht('Proceed With Caution'));

	return id(new AphrontDialogResponse())
	->setDialog($dialog)
	->setHTTPResponseCode(500);
	}

	}