How can I test connection to legacy DB using GlueContext of Spark

Hi, I'm running a data pipeline from legacy DB(oracle) to Redshift using AWS Glue. I want to test the connection to the legacy DB before executing ETL without test query in working python script.

as-is process of our script is legacy db connects and query > load data to s3

I want it as to-be process of our script

test legacy db connections > if failed > no etl

test legacy db connections > if succeeded > query > load data to s3

so, I script like follwing above of the code for ETL . this code is using the libs and param pyspark.contxt, format("jdbc").

connection_oracle_options = { "url": "jdbc:oracle:thin:@//<jdbc-host-name>:1521/ORCL", "user": "admin", "password": "pwd"}

I did not input argument "dbtable"

I read this param is not 'Required' in aws-glue-programming-etl-connect.md

When I do this, can the connection test be achieved? or better options?