Implement the Interface

Next step is to implement the Interface on the server side. We can do this by simply creating a Class that implements our Interface. But there is one remark: all methods of the class you want to expose should have @LPFCP.ExposedFunction annotation.

For our calculator, code of implementation will look like the following:

Kotlin

class CalculatorImpl : Calculator {
    @LPFCP.ExposedFunction
    override fun add(a: Int, b: Int) = a + b

    @LPFCP.ExposedFunction
    override fun subtract(a: Int, b: Int) = a - b
}

Java