Hadoop中InterfaceAudience 注解
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@InterfaceAudience.Public： 对所有工程和应用可用
@InterfaceAudience.LimitedPrivate： 仅限于某些特定工程，如Comomn，HDFS等
@InterfaceAudience.Private： 仅限于Hadoop
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/**
?* Annotation to inform users of a package, class or method's intended audience.
?*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class InterfaceAudience {
? /**
? ?* Intended for use by any project or application.
? ?*/
? @Documented public @interface Public {};
??
? /**
? ?* Intended only for the project(s) specified in the annotation.
? ?* For example, "Common", "HDFS", "MapReduce", "ZooKeeper", "HBase".
? ?*/
? @Documented public @interface LimitedPrivate {
? ? String[] value();
? };
??
? /**
? ?* Intended for use only within Hadoop itself.
? ?*/
? @Documented public @interface Private {};
?
? private InterfaceAudience() {} // Audience can't exist on its own
}
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