ShutdownHandler.php

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<?php

namespace Elgg\Application;

use Elgg\Application;
use Elgg\Traits\Loggable;
use Psr\Log\LogLevel;

class ShutdownHandler {

    use Loggable;

    protected $app;

    public function __construct(Application $app) {
        $this->app = $app;
    }

    public function __invoke() {
        try {
            $this->shutdownDatabase();
            $this->shutdownApplication();
            $this->persistCaches();
        } catch (\Throwable $e) {
            $this->log(LogLevel::CRITICAL, $e);
        }
    }

    public function shutdownDatabase() {
        $services = $this->app->internal_services;

        if ($services->db) {
            $services->db->executeDelayedQueries();

            $db_calls = $services->db->getQueryCount();
            $this->log(LogLevel::INFO, "DB Queries for this page: $db_calls");
        }
    }

    public function shutdownApplication() {
        $services = $this->app->internal_services;

        if (!$services->events->triggerBefore('shutdown', 'system')) {
            return;
        }

        $services->events->trigger('shutdown', 'system');

        global $GLOBALS;
        if (isset($GLOBALS['START_MICROTIME'])) {
            $time = (float) (microtime(true) - $GLOBALS['START_MICROTIME']);
            $uri = $services->request->server->get('REQUEST_URI', 'CLI');
            $this->log(LogLevel::INFO, "Page {$uri} generated in $time seconds");
        }

        $services->events->triggerAfter('shutdown', 'system');
    }

    public function persistCaches() {
        $this->app->internal_services->autoloadManager->saveCache();
    }
}