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From "M. C. Srivas (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2461) Support HDFS file name globbing in libhdfs
Date Mon, 17 Oct 2011 22:49:10 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2461?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13129303#comment-13129303

M. C. Srivas commented on HDFS-2461:

o.a.h.fs.FileSystem defines

   globStatus( String pattern)
   globStatus( String pattern, PathFilter filter)

Can we call the libhdfs functions with identical names, and returning identical values?

> Support HDFS file name globbing in libhdfs
> ------------------------------------------
>                 Key: HDFS-2461
>                 URL: https://issues.apache.org/jira/browse/HDFS-2461
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: libhdfs
>            Reporter: Mariappan Asokan
>            Priority: Minor
> This is to enhance the C API in libhdfs to support HDFS file name globbing.  The proposal
is to keep the new API simple and return a list of matched HDFS path names.  Callers can use
existing hdfsGetPathInfo() to get additional information on each of the matched path.  Following
code snippet shows the proposed API enhancements:
> {code:title=hdfs.h}
> /**
>  * hdfsGlob - Get all the HDFS file names that match a glob pattern.  The
>  * returned result will be sorted by the file names.  The last element in the
>  * array is NULL.  The function hdfsFreeGlob() should be called to free this
>  * array and its contents.
>  * @param fs The configured filesystem handle.
>  * @param globPattern The glob pattern to match file names against.  Note that
>  * this is not a POSIX regular expression but rather a POSIX glob pattern.
>  * @return Returns a dynamically-allocated array of strings; if there is no
>  * match, an array with one entry that has a NULL value will be returned.  If
>  * there is an error, NULL will be returned.
>  */
> char ** hdfsGlob(hdfsFS fs, const char *globPattern);
> /**
>  * hdfsFreeGlob - Free up the array returned by hdfsGlob().
>  * @param globResult The array of dynamically-allocated strings returned by
>  * hdfsGlob().
>  */
> void hdfsFreeGlob(char **globResult);
> {code}
> Please comment on the above proposed API.  I will start the implementation and testing.
 However, I need a committer to work with.
> Thanks.

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