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https://issues.apache.org/jira/browse/HADOOP-12021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14559985#comment-14559985
]
Andrew Wang commented on HADOOP-12021:
--------------------------------------
Gotcha, thanks Lewis. One more q, do you think loading a Configuration is
easier than doing this yourself? I wrote up a little snippet which might be a
nice starting point.
{code}
public class Hadooper {
public static void main(String[] args) throws Exception {
ClassLoader cl = Configuration.class.getClassLoader();
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document =
builder.parse(cl.getResourceAsStream("core-default.xml"));
NodeList nodeList = document.getDocumentElement().getChildNodes();
for (int i = 0; i < nodeList.getLength(); i++) {
Node node = nodeList.item(i);
if (node instanceof Element) {
if (node.getNodeName().equals("property")) {
System.out
.println(((Element)
node).getElementsByTagName("name").item(0).getTextContent());
System.out.println(
((Element)
node).getElementsByTagName("description").item(0).getTextContent());
}
}
}
}
}
{code}
> Augmenting Configuration to accomodate <description>
> ----------------------------------------------------
>
> Key: HADOOP-12021
> URL: https://issues.apache.org/jira/browse/HADOOP-12021
> Project: Hadoop Common
> Issue Type: New Feature
> Components: conf
> Reporter: Lewis John McGibbney
> Priority: Minor
> Fix For: 1.3.0, 2.8.0
>
> Attachments: Screen Shot 2015-05-26 at 2.22.26 PM (2).png
>
>
> Over on the
> [common-dev|http://www.mail-archive.com/common-dev%40hadoop.apache.org/msg16099.html]
> ML I explained a use case which requires me to obtain the value of the
> Configuration <description> tags.
> [~cnauroth] advised me to raise the issue to Jira for discussion.
> I am happy to provide a patch so that the <description> values are parsed out
> of the various XML files and stored, and also that the Configuration class is
> augmented to provide accessors to accommodate the use case.
> I wanted to find out what people think about this one and whether I should
> check out Hadoop source and submit a patch. If you guys could provide some
> advice it would be appreciated.
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