public function collectActivity(PostActionEvent $event)
    {
        $this->activity[] = array(
            'action_name' => $event->getAction()->getName(),
            'group_name' => $event->getAction()->getGroup()->getName(),
            'service_name' => $event->getAction()->getGroup()->getService()->getName(),
            'execution_time' => round($event->getExecutionTime() * 1000, 2),
            'arguments' => $event->getArguments(),
            'extra_data' => $event->getExtraData(),
        );

        $this->totalExecutionTime += $event->getExecutionTime();
        $this->totalCallCount += 1;
    }