Ng2Actor

Ng2Actor is an implement for angular2 or greater. It makes message exchange more easier between components or services in angular.

This project was generated with Angular CLI version 7.0.6.

Feature

• you can defined any actor in anywhere
• support broadcast messages
• support forward messages
• support foreground and background mode(foreground mode will handle the message right now , background mode will save message in actor's message box)
• very simple to use

Install

• run npm i -S ng2-actor in your project
• import Ng2ActorModule to your AppModule's imports field
• then you can define your actors , use anywhere

Usage

when you finished install,you can do following things to use actor

you can define an actor in any component or service.like this:

import {Component, OnDestroy, OnInit} from '@angular/core';
import {Actor, ActorService} from "ng2-actor";
 
@Component({
 selector: 'app-root',
 templateUrl: './app.component.html',
 styleUrls: ['./app.component.scss']
})
export class AppComponent implements OnInit,OnDestroy{
 title = 'ng2-electron-demo';
 appActor:Actor = null
 
 constructor(private $actor:ActorService){}
 
 ngOnInit(): void {
   this.$actor.create('first')
   this.appActor = this.$actor.start('demo',m=>{
     console.log(m.message)
   })
   this.appActor.sendByName('first','hi~first')
   setTimeout(()=>{this.appActor.sendByName('first','hi~first2')},2000)
 }
 
 ngOnDestroy(): void {
   this.$actor.stop(this.appActor.name)
 }
 
}

1. Inject ActorService using DI.
2. Create an Actor and give it a receiver function.
3. Send messages according to actor.
4. When the component destroy, you can stop or pause this actor.

It is so easy?Right?

APIs

Actor [Model Class]

Fields

• .name : a unique name for actor, required.
• .state : the actor's state, it has two value:Actor.STATE_FOREGROUND and Actor.STATE_BACKGROUND.
• .backgroundMessageBox : a message box for message cache when actor under the background state.Usually, you need not to access it.
• .actorSystem : ActorService's reference.

Methods

• constructor(name:string,actorSystem:ActorService)
• receive(m:{message:any,sender:Actor,receiver:Actor})=>any : Actor's message handler
• sendByName(name:string,message:any)=>void
• send(actor:Actor,message:any)=>void
• forwardByName(name:string,msg:{message:any,sender:Actor,receiver:Actor})=>void : forward method can give the message to another actor and keep the origin sender
• forward(actor:Actor,msg:{message:any,sender:Actor,receiver:Actor})=>void
• broadcast(message:any)=>void : can send a message to all actors, include itself
• tell(message:any,sender:Actor)=>void : let this actor receive a message with a sender. Usually, you should use sendXXX method to send message not this
• become(receiver:(m:{message:any,sender:Actor,receiver:Actor})=>any)=>void : change the actor's receive handler

ActorService [Service Class]

Fields

• .actors : all the actors in this actor system

Method

• create(name:string):Actor : create an actor with a none receiver and background state in actor system. It can be used in prebuilt an actor and let it cache message during it not started
• start(name:string,receiver:(m:{message:any,sender:Actor,receiver:Actor})=>any):Actor : start an actor with a receiver by name and let this actor in foreground state
• startActor(actor:Actor):Actor
• pause(name:string):void : let this actor switch to background mode by name
• stop(name:string):void : remove the actor from this actor system by name

PRELOAD_ACTORS [InjectionToken]

• the preload actor defined. You can provide it in your app module to build preload actor by giving name array. For example:

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    Ng2ActorModule
  ],
  providers: [
    {provide:PRELOAD_ACTORS,useValue:['a','b']}
  ],
  bootstrap: [AppComponent]
})
export class AppModule { }

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