[GitHub] [spark] HyukjinKwon opened a new pull request #24023: [SPARK-27102][R][PYTHON][CORE] Remove the references to Python's Scala codes in R's Scala codes

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

HyukjinKwon opened a new pull request #24023: [SPARK-27102][R][PYTHON][CORE] Remove the references to Python's Scala codes in R's Scala codes
URL: https://github.com/apache/spark/pull/24023
 
 
   ## What changes were proposed in this pull request?
   
   Currently, R's Scala codes happened to refer Python's Scala codes for code deduplications. It's a bit odd. For instance, when we face an exception from R, it shows python related code path, which makes confusing to debug. It should rather have one code base and R's and Python's should share.
   
   This PR proposes:
   
   1. Make a `SocketAuthServer` and move `PythonServer` so that `PythonRDD` and `RRDD` can share it.
   2. Move `readRDDFromFile` and `readRDDFromInputStream` into `JavaRDD`.
   3. Reuse `RAuthHelper` and remove `RSocketAuthHelper` in `RRDD`.
   4. Rename `getEncryptionEnabled` to `isEncryptionEnabled` while I am here.
   
   So, now, the places below:
   
   - `sql/core/src/main/scala/org/apache/spark/sql/api/r`
   - `core/src/main/scala/org/apache/spark/api/r`
   - `mllib/src/main/scala/org/apache/spark/ml/r`
   
   don't refer Python's Scala codes.
   
   ## How was this patch tested?
   
   Existing tests should cover this.

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