Spark : DB connection per Spark RDD partition and do mapPartition

Question

I want to do a mapPartitions on my spark rdd,

    val newRd = myRdd.mapPartitions(
      partition => {

        val connection = new DbConnection /*crea         


        

Answer 1

rdd.foreachPartitionAsync(iterator->{

// this object will be cached inside each executor JVM. For the first time, the //connection will be created and hence forward, it will be reused. 
// Very useful for streaming apps
DBConn conn=DBConn.getConnection()
while(iterator.hasNext()) {
  conn.read();
}

});

public class DBConn{
private static dbObj=null;

//Create a singleton method that returns only one instance of this object
}

}