[jira] [Updated] (ACCUMULO-3012) Simplify DefaultConfiguration

["Bill Havanki (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ACCUMULO-3012?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bill Havanki updated ACCUMULO-3012:
-----------------------------------

    Status: Patch Available  (was: In Progress)

> Simplify DefaultConfiguration
> -----------------------------
>
>                 Key: ACCUMULO-3012
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3012
>             Project: Accumulo
>          Issue Type: Sub-task
>            Reporter: Bill Havanki
>            Assignee: Bill Havanki
>            Priority: Minor
>             Fix For: 1.6.1, 1.7.0
>
>
> The current implementation of {{DefaultConfiguration}} has some downsides:
> * Its internal map of configuration defaults is built on-demand in its singleton instance, which drives the need to synchronize access to the singleton. The map could be built statically.
> * That same map could be made immutable as well.
> * Even though it uses a singleton, {{new DefaultConfiguration()}} is still permitted since the no-arg constructor isn't defined as private.
> * Calls to {{DefaultConfiguration.getInstance()}} cannot be easily mocked.
> * Its main method no longer has anything to do with it, and instead belongs in {{ConfigurationDocGen}}.
> Improve and simplify {{DefaultConfiguration}}.



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