public static String getSpoutMetricName(String topic, String group){
        return CAT_METRIC_NAME_PREFIX.concat(topic).concat("[").concat(group).concat("]");
    }
public static String getSpoutMetricName ( String topic , String group ) { return CAT_METRIC_NAME_PREFIX . concat ( topic ) . concat ( "[" ) . concat ( group ) . concat ( "]" ) ; }
返回BlackHoleSout的metric名称
@param topic
@param group
@return