PhabricatorEventEngine.php
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	<?php

	final class PhabricatorEventEngine {

	public static function initialize() {
	// NOTE: If any of this fails, we just log it and move on. It's important
	// to try to make it through here because users may have difficulty fixing
	// fix the errors if we don't: for example, if we fatal here a user may not
	// be able to run `bin/config` in order to remove an invalid listener.

	// Load automatic listeners.
	$listeners = id(new PhutilSymbolLoader())
	->setAncestorClass('PhabricatorAutoEventListener')
	->loadObjects();

	// Load configured listeners.
	$config_listeners = PhabricatorEnv::getEnvConfig('events.listeners');
	foreach ($config_listeners as $listener_class) {
	try {
	$listeners[] = newv($listener_class, array());
	} catch (Exception $ex) {
	phlog($ex);
	}
	}

	// Add built-in listeners.
	$listeners[] = new DarkConsoleEventPluginAPI();

	// Add application listeners.
	$applications = PhabricatorApplication::getAllInstalledApplications();
	foreach ($applications as $application) {
	$app_listeners = $application->getEventListeners();
	foreach ($app_listeners as $listener) {
	$listener->setApplication($application);
	$listeners[] = $listener;
	}
	}

	// Now, register all of the listeners.
	foreach ($listeners as $listener) {
	try {
	$listener->register();
	} catch (Exception $ex) {
	phlog($ex);
	}
	}
	}

	}