[GitHub] [druid] JulianJaffePinterest opened a new issue #10932: `StandardCharsets.UTF-8` and `StringUtils.UTF8_STRING` used inconsistently

[GitBox <gi...@apache.org>]

JulianJaffePinterest opened a new issue #10932:
URL: https://github.com/apache/druid/issues/10932


   `StandardCharsets.UTF-8` is used throughout the Druid code base despite the fact that `StringUtils` wraps it as `UTF8_CHARSET`. This means that despite`StringUtils` deprecating `UTF8_CHARSET` for performance reasons, `StandardCharsets.UTF-8` is still widely used and a number of Druid interfaces still take `CharSets` instead of the charset's String name.
   
   If the deprecation note for `UTF8_CHARSET` is still operative, we should migrate the uses of charsets to strings. If the note is not accurate, we should remove the deprecation notice and instead deprecate the string name constant (`UTF8_STRING`). Either way, as long as we are defining "wrapper" constants in `StringUtils`, we should remove the direct usages of `StandardCharsets.UTF-8` and consider adding it to the list of forbidden APIs.
   
   
   (For what it's worth, `StringUtils.UTF8_CHARSET` is never used in the Druid code base, while `String Utils.UTF8_STRING` is. This suggests to me that when `StringUtils.UTF8_CHARSET` was deprecated, someone made sure to migrate its uses but missed all the places where the standard charset constants were used directly.)


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