code: public static void initialize() {
  		if (isInitialized) {
  			return;
  		}
  		isInitialized = true;
  		printLogo();
  		try {
  			logger.info("--- Para.initialize() [{}] ---", Config.ENVIRONMENT);
  
  			for (InitializeListener initListener : INIT_LISTENERS) {
  				if (initListener != null) {
  					initListener.onInitialize();
  					logger.debug("Executed {}.onInitialize().", initListener.getClass().getName());
  				}
  			}
  			logger.info("Instance #{} initialized.", Config.WORKER_ID);
  		} catch (Exception e) {
  			logger.error("Failed to initialize Para.", e);
  		}
  	}
docs: Executes all initialize listeners and prints logo. Call this method first.