Certainly! Here's a detailed class-level Javadoc comment summarizing what the class is doing:
/**
* The {@code IFFServices} class provides methods for managing and performing service calls
* to primary and secondary data sources with resilience and error handling.
* <p>
* This class operates in a fault-tolerant manner, attempting to make calls to the primary data source
* first, and if it fails or takes too long, it will proceed to the secondary data source. The class is
* designed to switch between these sources dynamically based on certain conditions, such as the success