Free 50 (Scala)

Attention.md

Free 50 (Scala)

• Incoming Requests to various URLs of a web-service are modelled as:
  • Visits - A tuple containing Client IP and number of visits made from that IP.

  import java.net.InetAddress
  type Visits = (InetAddress, Int)
  

  • Request - An ADT containing the web-service URL with a list of clients that made the visits.

  import java.net.URL
  case class Request(val url: URL, val from: List[Visits])
  

• Clients of Geographic Services can make 50 free calls in a day, more than that result in blocking that IP.
• Refer to FreeFifty.scala for web-request data and implement the bodies marked with ???

FreeFifty.scala

import java.net.{InetAddress, URL}
type Visits = (InetAddress, Int)
case class Request(val url: URL, val from: List[Visits])

val hits: List[Request] = List(
  Request(new URL("https://geographic-services.com/api/weather"),               
          List((InetAddress.getByName("56.22.11.1"), 3), 
               (InetAddress.getByName("22.11.1.123"), 4))),
  Request(new URL("https://geographic-services.com/api/places/nearby/London"), 
          List((InetAddress.getByName("182.124.0.2"), 56), 
               (InetAddress.getByName("87.12.191.12"), 35))),
  Request(new URL("https://geographic-services.com/api/places"), Nil),
  Request(new URL("https://geographic-services.com/api/weather/IN/Mumbai"), 
          List((InetAddress.getByName("56.22.11.1"), 8), 
               (InetAddress.getByName("87.12.191.12"), 25))),
)

// Using Either implement the following:
val interactions: List[Either[URL, List[Visits]]] = ???

// Using interactions implement the following:
val clientIpsToBeBlocked: List[Visits] = ???
println("Block these IPs => " + clientIpsToBeBlocked) // List((/87.12.191.12,60), (/182.124.0.2,56)) 

val unusedUrls: List[URL] = ???
println("unused URLs => " + unusedUrls) // List(https://geographic-services.com/api/places)