JarCasting
Laeta
Small library to handle registery of services.
Handle collection of Services of arbitrary type and retrieve them fully typed.
Table of Contents
Created by gh-md-toc
How to use?
Add to build.sbt
First include the library in your project:
libraryDependencies += "com.leobenkel" %% "laeta" % "[VERSION]"
With version being:
Setup
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] {}
To use
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)
Notes
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.