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https://issues.apache.org/jira/browse/HDFS-9117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14978780#comment-14978780
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Haohui Mai commented on HDFS-9117:
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bq. I disagree; the code is required for a pure C++ implementation that
satisfies the use case of "Read the local config and connect to HDFS." The
libhdfs compatability layer should be for the glue for the C API.
The principle is that the C++ APIs should be able to solely rely on the
{{Options}} class for all configurations. The class is strongly-typed and has
clear schema. From the dependency point of view there are strong desires and
use cases that running libhdfspp without depending XML configuration. I'll be
-1 if the C++ APIs are bundled with XML configurations.
bq. It has been moved over with the other substitutions. It's implemented,
tested, and part of the spec of the Java config files, so I don't see any
reason to excise it.
Environment variables and substitutions are clearly platform-dependent. There
are use cases that want a platform-independent implementation for minimal
dependency. The implementation needs to address the use case.
> 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-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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