A local Parquet file to SparkSQL cache

gistfile1.java

public void readAndCache(SQLContext sqlCtx, File file) {
    final DataFrame df = sqlCtx.read().parquet("file://" + file.getAbsolutePath())
    sqlCtx.registerDataFrameAsTable(df, name);
    sqlCtx.cacheTable(name); // != df.persist(StorageLevel.MEMORY_ONLY_SER()) when reading from a Parquet file
    
    final long rowCount = df.count(); // warm-up cache
}