docs: public static void destroyed(String appid,String... types){
  		for(String type : types){
  			String key = appid + KEY_JOIN + type;
  			if(futureMap.containsKey(key)){
  				futureMap.get(key).cancel(true);
  				logger.info("destroyed appid:{} type:{}",appid,type);
  			}
  		}
  	}