Small library to handle registery of services.

Handle collection of Services of arbitrary type and retrieve them fully typed.

Laeta (wikipedia)

• How to use?
  • Add to build.sbt
  • Setup
  • To use
  • Notes

Created by gh-md-toc

First include the library in your project:

libraryDependencies += "com.leobenkel" %% "laeta" % "[VERSION]"

With version being:

Live example: Scastie-0P5GodpCSSmL5Pd8igL0tA or take a look at the test example

You need two pieces for the compiler to start guiding you:

A service:

import com.leobenkel.laeta.Service

case class MyService(override val input: INPUT) extends Service[INPUT, MyService] {
 ???
}

And a factory:

import com.leobenkel.laeta.ServiceFactory

case class MyFactory(override val getInput: Int) extends ServiceFactory[INPUT, MyService] {
    lazy override protected val getObject: ServiceConstructor[INPUT, MyService] = MyConstructor
    lazy override protected val getType:   ServiceType[MyService] = MyGeyKey
}

This will force you to create:

A constructor:

object MyConstructor extends ServiceConstructor[INPUT, MyService]

Your MyConstructor should probably have the same name as case class MyService so you don't have to implement the apply method.

and a Type:

case object MyGeyKey extends ServiceType[MyService] {}

And to use is very simple, you first register all the factories:

val registryBuilder: RegistryFactories = RegistryFactories()
    .register(MyFactory(input))

and then you seal the registry:

val registryReady: ServiceCollection = registryBuilder.create

you can now access any service, anywhere, typed !

val myService = registryReady.getService(MyGeyKey)

It is possible to merge the ServiceConstructor[INPUT, MyService] and the ServiceType[MyService] for shorter code.

This mean you can replace all the places where we used MyGeyKey by MyConstructor.

Example on Scastie-716dNpMORwuJqO9RWED93A.