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From "Bob Hansen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9117) Config file reader / options classes for libhdfs++
Date Wed, 11 Nov 2015 11:31:11 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15000265#comment-15000265
] 

Bob Hansen commented on HDFS-9117:
----------------------------------

bq. Unfortunately requiring c++ exceptions might not be an option for other users as discussed
in the libhdfs3 branch.
I'm sorry; I didn't see that discussion in libhdfs3.  Can you link to it or summarize it here?
 Have things changed since your comment on this Jira on 10/27:
bq. 2. The code should not use C++ exceptions.


Re; Optional
{quote}
I'm okay to bring it in. Some example can be:
https://github.com/llvm-mirror/llvm/blob/master/include/llvm/Support/ErrorOr.h
http://www.boost.org/doc/libs/1_59_0/boost/optional/optional.hpp
{quote}

Are you suggesting copying one of those implementations into our codebase?  We can, but it
seems a pretty heavyweight solution.  I hate to ask, but should that be a distinct Jira for
bringing in third party code?

> Config file reader / options classes for libhdfs++
> --------------------------------------------------
>
>                 Key: HDFS-9117
>                 URL: https://issues.apache.org/jira/browse/HDFS-9117
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client
>    Affects Versions: HDFS-8707
>            Reporter: Bob Hansen
>            Assignee: Bob Hansen
>         Attachments: HDFS-9117.HDFS-8707.001.patch, HDFS-9117.HDFS-8707.002.patch, HDFS-9117.HDFS-8707.003.patch,
HDFS-9117.HDFS-8707.004.patch, HDFS-9117.HDFS-8707.005.patch, HDFS-9117.HDFS-8707.006.patch,
HDFS-9117.HDFS-8707.008.patch, HDFS-9117.HDFS-8707.009.patch, HDFS-9117.HDFS-8707.010.patch,
HDFS-9117.HDFS-8707.011.patch, HDFS-9117.HDFS-8707.012.patch, HDFS-9117.HDFS-8707.013.patch,
HDFS-9117.HDFS-9288.007.patch
>
>
> For environmental compatability with HDFS installations, libhdfs++ should be able to
read the configurations from Hadoop XML files and behave in line with the Java implementation.
> Most notably, machine names and ports should be readable from Hadoop XML configuration
files.
> Similarly, an internal Options architecture for libhdfs++ should be developed to efficiently
transport the configuration information within the system.



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