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https://issues.apache.org/jira/browse/HADOOP-18187?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17528611#comment-17528611
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Daniel Carl Jones commented on HADOOP-18187:
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Here's an example of a file with good JavaDoc.
[https://github.com/apache/hadoop/blob/60cb6b5743c67dedc3f6575621d6a150ebc0761f/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/impl/OpenFileSupport.java]
One of the main goals for this task is to move a lot of non-JavaDoc comments to
JavaDoc. There's many instances of good documentation but it won't be picked up
by the JavaDoc pages or IDE hints.
A few examples...
* Class fields like this:
[https://github.com/apache/hadoop/commit/342e1cd3fcbd2e7d00ab6a620c8ae4919bbc4201#diff-fa939ca467a01f13835de546620f926f3acd0f0f8730ae8c0960a7238e05fc4aR33-R40]
* Enum values like this:
[https://github.com/apache/hadoop/commit/342e1cd3fcbd2e7d00ab6a620c8ae4919bbc4201#diff-13d9d8e446f8fc6c5a1f2842ef9629dcd8310519cd6d40cdc26607b91ba609a8R45-R63]
* Good comments about class invariants but should be part of the class docs:
[https://github.com/apache/hadoop/commit/342e1cd3fcbd2e7d00ab6a620c8ae4919bbc4201#diff-05c34609715bb2a5a20e67e6f70d876f4ebe23ba275dad29cec4b184b552a1adR49-R52]
> Convert s3a prefetching to use JavaDoc for fields and enums
> -----------------------------------------------------------
>
> Key: HADOOP-18187
> URL: https://issues.apache.org/jira/browse/HADOOP-18187
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.4.0
> Reporter: Daniel Carl Jones
> Assignee: Bhalchandra Pandit
> Priority: Minor
>
> There's lots of good comments for fields and enum values in the current code.
> Let's expose these to your IDE with JavaDoc instead.
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