private static String resolveDeprecatedClassName(String oldName) {
    String className = oldName.trim();
    if (className.equals(DEPRECATED_NAME_OF_PRESSURE_AWARE_THROUGHPUT_CONTROLLER_CLASS)) {
      className = PressureAwareCompactionThroughputController.class.getName();
    } else if (className.equals(DEPRECATED_NAME_OF_NO_LIMIT_THROUGHPUT_CONTROLLER_CLASS)) {
      className = NoLimitThroughputController.class.getName();
    }
    if (!className.equals(oldName)) {
      LOG.warn(oldName + " is deprecated, please use " + className + " instead");
    }
    return className;
  }
Resolve deprecated class name to keep backward compatibiliy
@param oldName old name of the class
@return the new name if there is any
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/throttle/CompactionThroughputControllerFactory.java