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Pure Functional HTTP APIs in Scala

Akka-HTTP Routes

Explore how to create and manage Akka-HTTP routes in Scala, including defining endpoints for retrieving and updating products. Understand how to start a server and handle JSON marshalling using Circe support.

We'll cover the following...

Basic routes

Defining the routes is pretty simple if you are used to the Akka-HTTP routing DSL syntax.

Scala
val route = path("product" / JavaUUID) { id: ProductId =>
  get {
    ???
  } ~ put {
    ???
  }
} ~ path("products") {
  get {
    ???
  } ~
  post {
    ???
  }
}

We will fill in the details later on.

Starting the server

Now, let’s start the actual server to make use of our routes.

Scala
val host = system.settings.config.getString("api.host")
val port = system.settings.config.getInt("api.port")
val srv = Http().bindAndHandle(route, host, port)
val pressEnter = StdIn.readLine()
srv.flatMap(_.unbind()).onComplete(_ => system.terminate())

The code will fire ...