How to retrieve Spark Session inside java jar library installed on Cluster

[ayush19]

I have a java app in form of jar package. This jar is installed on a Databricks cluster. This jar package reads and writes to few tables in databricks. In order to achieve that, I need SparkSession available in the code. Given that spark session is already running in Databricks, I need to somehow access it. 

I tried various methods like SparkSession.builder, SparkSession.active and SparkSession.getActiveSession but none are available in databricks. How can I access the session inside my code?

I tried to pass session directly via main function arguments and it's working but as a requirement of the main function, I also need to pass some other String arguments so I need a way to get session in code some other way

[hemprasad]

Hi , I am having  a JAVA  jar in volume and trying to get the existing session with unity catalog enabled . I only get the spark_catalog. Any help will be appreciated .

[ayush19]

Thank you for reply. This solves the issue. I was passing ".appName" as well with builder which was causing the issue. I tried the solution you mentioned it worked. Thank you

[IslaGray]

Thanks for the update, I will try it too.