What is the best option to run custom Java code in a periodical manner within...

Write a custom task with the Javalogic and configure it to run periodically.

Option b and c are correct.

Write a Class mediator with the Java logic, create a proxy service that uses that mediator, and send messages using an external client periodically.

Write a Class mediator with the Java logic, create a proxy service that uses that mediator, and send messages using an external client periodically.