InterfaceAudience InterfaceStability

来源：互联网发布：unity3d动态加载图片编辑：程序博客网时间：2024/06/06 21:05

hadoop common 下的两个类 InterfaceAudience ，InterfaceStability ；

InterfaceAudience 有三个抽象方法，主要用于说明使用的范围

/**
* Intended for use by any project or application. 在任何项目或应用中可使用
*/

@InterfaceAudience.Public

/**
* Intended only for the project(s) specified in the annotation.
* For example, "Common", "HDFS", "MapReduce", "ZooKeeper", "HBase".

* 只能用在指定的项目中如"Common", "HDFS", "MapReduce", "ZooKeeper", "HBase"
*/
@InterfaceAudience.LimitedPrivate

/**
* Intended for use only within Hadoop itself. 只能在hadoop本身项目中使用
*/

@InterfaceAudience.Private

InterfaceStability 有三个抽象方法，主要用于说明版本的稳定性，及有特定包的依赖

/**
   * Can evolve while retaining compatibility for minor release boundaries.;
   * can break compatibility only at major release (ie. at m.0). 主版本是稳定的，不同主版本间可能不兼容
   */

@InterfaceStability.Stable

/**
* Evolving, but can break compatibility at minor release (i.e. m.x) 不断变化，不同次版本间可能不兼容
*/

@InterfaceStability.Evolving

/**
   * No guarantee is provided as to reliability or stability across any 不能提供稳定性和可靠性
   * level of release granularity.
   */

@InterfaceStability.Unstable

0 0