tarant-utils
v1.0.13
Published
utils for the tarant library
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Motivation
Provide a set of utils that help apply some of the paterns that tarant uses.
Installation
add it to your project using npm install tarant-utils --save
or yarn add tarant-utils
Usage
Decorator
We recomend to use the decorator pattern to keaping separation of concerns in between the business logic of an actor and the logic that some of the resolvers and materializers require.
For example having the next actor
class AppActor extends Actor {
constructor(name: string) {
super(name)
}
public addOne() : void {
this.counter++
}
public counter = 1;
}
the definition of the serialization information could be done like
class SerializationDecorator extends decorator<AppActor> {
constructor(actor: AppActor) {
super(actor)
}
toJson() {
return {
id: this.actor.id,
type: "AppActor",
counter: this.actor.counter
}
}
updateFrom({ counter }: any): void {
this.actor.counter = counter
}
}
and the mix the actor and the decorator for it to be resolved in the actor system that is registered
const DecoratedActor = decorate(AppActor, SerializationDecorator)
export default DecoratedActor