[jira] [Updated] (HDFS-9951) Use string constants for XML tags in OfflineImageReconstructor

["Colin Patrick McCabe (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-9951?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Colin Patrick McCabe updated HDFS-9951:
---------------------------------------
    Summary: Use string constants for XML tags in OfflineImageReconstructor  (was: Improve the Node key definition in OfflineImageReconstructor)

> Use string constants for XML tags in OfflineImageReconstructor
> --------------------------------------------------------------
>
>                 Key: HDFS-9951
>                 URL: https://issues.apache.org/jira/browse/HDFS-9951
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Lin Yiqun
>            Assignee: Lin Yiqun
>            Priority: Minor
>         Attachments: HDFS-9551.001.patch
>
>
> In class {{OfflineImageReconstructor}}, it uses many {{SectionProcessors}} to process xml files and load the subtree of the XML into a Node structure. But there are lots of places that node removes key by directively writing value in methods rather than define them first. Like this:
> {code}
> Node expiration = directive.removeChild("expiration");
> {code}
> We could improve this to define them in Node and them invoked like this way:
> {code}
> Node expiration=directive.removeChild(Node.CACHE_MANAGER_SECTION_EXPIRATION);
> {code}
> And it will be good to manager node key's name in the future.



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