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https://issues.apache.org/jira/browse/ACCUMULO-4690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16111477#comment-16111477
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Christopher Tubbs commented on ACCUMULO-4690:
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ObservableConfiguration is an interface for a specific implementation of
updating with ZooCache. I plan on rewriting that implementation as part of
ACCUMULO-4050. However, I do like the idea of having configuration updates
dynamically tracked. This feature may be more easily implemented if we moved to
a standard config library for the site file (commons-configuration2, for
example). The larger problem to consider is that some properties are not
dynamically reloadable, and we need to clearly define the dynamic reloading
behavior on a per-property basis and communicate that to users.
> Observable configurations
> -------------------------
>
> Key: ACCUMULO-4690
> URL: https://issues.apache.org/jira/browse/ACCUMULO-4690
> Project: Accumulo
> Issue Type: Improvement
> Components: core
> Affects Versions: 2.0.0
> Reporter: Ivan Bella
> Priority: Minor
>
> Currently only the table and namespace configurations are observable
> (implement ObservableConfiguration). In order to appropriately deal with
> system/site configuration changes one needs to use a Timer that periodically
> checks the configuration (see TabletServerResourceManager for example). It
> would be nice if we create an observable mechanism for those changes as well.
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