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Hadoop学习六:Hadoop-Hdfs源码 classification包

 
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一.org.apache.hadoop.classification.*

 

二.解释

  •  InterfaceAudience类包含三个注解类,用来说明被注解类的使用范围。
    • InterfaceAudience.Public:所有工程可以使用被注解类。
    • InterfaceAudience.LimitedPrivate:指定的某些工程可以使用被注解类。For example, "Common", "HDFS", "MapReduce", "ZooKeeper", "HBase"。
    • InterfaceAudience.Private:仅Hadoop工程可以使用被注解类。
  • InterfaceStability类包含三个注解类,用来说明被注解类的稳定性。
    • InterfaceStability.Stable:稳定版本。
    • InterfaceStability.Evolving:不断变化的版本。
    • InterfaceStability.Unstable:不保证稳定性的版本。

 

三.如果你不懂JDK1.5新特性注解,你可以参考以下DEMO

写道
# Non-members may check out a read-only working copy anonymously over HTTP.
svn checkout http://cloud-file-system.googlecode.com/svn/trunk/SourceCode/Kit/  
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