Connecting Java and Apache Spark with ADBC

Instructions

Tip

If you already have a Spark instance running, skip the steps to set up and clean up Spark.

Start a Spark instance:

docker run -d --rm --name spark-connect -p 15002:15002 apache/spark:4.1.2 bash -c "/opt/spark/sbin/start-connect-server.sh && tail -f /dev/null"

Install the Spark ADBC driver:
```
dbc install spark --pre
```
Customize the main method in Example.java
- Change the connection arguments in the params.put() calls
  - Format uri according to the driver documentation, or keep it as is
- If you changed which database you're connecting to, also change the SQL SELECT statement in stmt.setSqlQuery()
Run the Java program:
```
mvn compile exec:exec
```

Stop the Docker container running Spark:

docker stop spark-connect