SampleOperation.swift

import Foundation

class SampleOp : Operation {
    private var timeout: Double
    
    init(timeout: Double) {
        self.timeout = timeout
        
        super.init()
    }
    
    override func start() {
        super.start()
        
        delay(timeout) {
            self.result = "hello from \(self.name!)!"
        }
    }
}