fqcn
Set the fully qualified class name of the worker class to generate.
Normally, the class name is inferred from the name of the WorkerFactory implementation class, but users can choose to override this if they prefer.
Note that if this value begins with a ".", it will be prepended with the package that the WorkerFactory implementation lives in. Similarly, if this value ends with a ".", its package will be used and then appended with a class name inferred from the WorkerFactory implementation's name.
For a concrete example, if this worker's WorkerFactory implementation is com.example.PiCalculatorWorkerFactory, then...
fqcn = not set → "com.example.PiCalculatorWorker"
fqcn = "com.mysite.PiWorker" → "com.mysite.PiWorker"
fqcn = ".PiWorker" → "com.example.PiWorker"
fqcn = "com.mysite." → "com.mysite.PiCalculatorWorker"
fqcn = ".mysite.PiWorker" → "com.example.mysite.PiWorker"
fqcn = ".mysite." → "com.example.mysite.PiCalculatorWorker"