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HADOOP-8059. Add javadoc to InterfaceAudience and InterfaceStability. Contributed by Brandon Li. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1354684 13f79535-47bb-0310-9956-ffa450edef68
(cherry picked from commit 24c4216bf0)

Conflicts:
	hadoop-common-project/hadoop-common/CHANGES.txt
This commit is contained in:
Suresh Srinivas 2012-06-27 19:32:21 +00:00 committed by cnauroth
parent d684b21ada
commit 3a783fe38d
3 changed files with 33 additions and 1 deletions
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18
hadoop-common-project/hadoop-annotations/src/main/java/org/apache/hadoop/classification/InterfaceAudience.java
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@ -23,6 +23,24 @@ import java.lang.annotation.RetentionPolicy;
/**
* Annotation to inform users of a package, class or method's intended audience.
* Currently the audience can be {@link Public}, {@link LimitedPrivate} or
* {@link Private}. <br>
* All public classes must have InterfaceAudience annotation. <br>
* <ul>
* <li>Public classes that are not marked with this annotation must be
* considered by default as {@link Private}.</li>
*
* <li>External applications must only use classes that are marked
* {@link Public}. Avoid using non public classes as these classes
* could be removed or change in incompatible ways.</li>
*
* <li>Hadoop projects must only use classes that are marked
* {@link LimitedPrivate} or {@link Public}</li>
*
* <li> Methods may have a different annotation that it is more restrictive
* compared to the audience classification of the class. Example: A class
* might be {@link Public}, but a method may be {@link LimitedPrivate}
* </li></ul>
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving

13
hadoop-common-project/hadoop-annotations/src/main/java/org/apache/hadoop/classification/InterfaceStability.java
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@ -21,9 +21,20 @@ import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import org.apache.hadoop.classification.InterfaceAudience.LimitedPrivate;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceAudience.Public;
/**
* Annotation to inform users of how much to rely on a particular package,
* class or method not changing over time.
* class or method not changing over time. Currently the stability can be
* {@link Stable}, {@link Evolving} or {@link Unstable}. <br>
*
* <ul><li>All classes that are annotated with {@link Public} or
* {@link LimitedPrivate} must have InterfaceStability annotation. </li>
* <li>Classes that are {@link Private} are to be considered unstable unless
* a different InterfaceStability annotation states otherwise.</li>
* <li>Incompatible changes must not be made to classes marked as stable.</li>
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving

3
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -262,6 +262,9 @@ Release 2.7.0 - UNRELEASED
HADOOP-11714. Add more trace log4j messages to SpanReceiverHost (cmccabe)
HADOOP-8059. Add javadoc to InterfaceAudience and InterfaceStability.
(Brandon Li via suresh)
OPTIMIZATIONS
HADOOP-11323. WritableComparator#compare keeps reference to byte array.