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https://issues.apache.org/jira/browse/WHIRR-370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13176852#comment-13176852
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Tom White commented on WHIRR-370:
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Velocity is tried and tested, so would be a good choice in my opinion.
> Templating for configuration files
> ----------------------------------
>
> Key: WHIRR-370
> URL: https://issues.apache.org/jira/browse/WHIRR-370
> Project: Whirr
> Issue Type: Improvement
> Components: core
> Reporter: Tom White
> Fix For: 0.8.0
>
>
> Service configuration is currently done via the Whirr properties file by
> using a special per-service prefix (e.g. 'hadoop-common'). Using a templating
> approach (using e.g. Velocity) would make changing properties more familiar
> to users, and would make it easier for service implementors (since they
> wouldn't need to implement a generator class for each configuration file).
> It might even be possible to support the old syntax (so users can still
> configure everything from one file if they wished) by, e.g., appending all
> properties starting 'hadoop-common' to the core-site.xml template, etc.
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