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package com.example;
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import akka.actor.typed.ActorRef;
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import akka.actor.typed.Behavior;
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import akka.actor.typed.javadsl.AbstractBehavior;
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import akka.actor.typed.javadsl.ActorContext;
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import akka.actor.typed.javadsl.Behaviors;
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import akka.actor.typed.javadsl.Receive;
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import akka.actor.typed.javadsl.*;
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import java.time.Duration;
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import java.util.Objects;
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import java.util.logging.Logger;
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public class Actor extends AbstractBehavior<Actor.Message> {
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//Timer für die Berechnung
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final TimerScheduler<Message> timer;
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//Zurückgegebener String & Integer von der linken Seite
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String leftString;
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int leftInt;
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//Zurückgegebener String & Integer von der rechten Seite
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String rightString;
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int rightInt;
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//Zeichen für die Operation (Add, Sub, Mul) welche benutzt wird
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String operationString;
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String name;
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Expression expression;
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public interface Message{}
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public record Compute() implements Message{}
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public record PrintAndEvaluate(Expression expression) implements Message{}
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//Antwort von dem linken Kind
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public record LeftResponse(String string, int wert) implements Message{}
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//Antwort von dem rechten Kind
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public record RightResponse(String string, int wert) implements Message{}
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private Actor(ActorContext<Message> context, String name, TimerScheduler<Message> timer){
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super(context);
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this.name = name;
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this.timer = timer;
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}
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public static Behavior<Actor.Message> create(String name){
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return Behaviors.setup(context -> Behaviors.withTimers(timers -> new Actor(context, name, timers)));
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}
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@Override
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public Receive<Actor.Message> createReceive(){
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return newReceiveBuilder()
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.onMessage(PrintAndEvaluate.class, this::onPrintAndEvaluate)
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.onMessage(LeftResponse.class, this::onLeftResponse)
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.onMessage(RightResponse.class, this::onRightResponse)
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.onMessage(Compute.class, this::onComputeMessage)
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.build();
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}
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private Behavior<Message> onPrintAndEvaluate(PrintAndEvaluate message){
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this.expression = message.expression;
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//Wenn initial nur Val übergeben wird → einfach ausgeben ansonsten UnterActors erstellen
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if (Objects.requireNonNull(expression) instanceof Expression.Add add) {
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this.operationString = "+";
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ActorRef<SubActor.Message> LeftSubActor = getContext().spawnAnonymous(SubActor.create());
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LeftSubActor.tell(new SubActor.PrintAndEvaluate(getContext().getSelf(),add.left(), true));
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ActorRef<SubActor.Message> RightSubActor = getContext().spawnAnonymous(SubActor.create());
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RightSubActor.tell(new SubActor.PrintAndEvaluate(getContext().getSelf(),add.right(), false));
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}
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else if (expression instanceof Expression.Sub sub) {
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this.operationString = "-";
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ActorRef<SubActor.Message> LeftSubActor = getContext().spawnAnonymous(SubActor.create());
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LeftSubActor.tell(new SubActor.PrintAndEvaluate(getContext().getSelf(),sub.left(), true));
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ActorRef<SubActor.Message> RightSubActor = getContext().spawnAnonymous(SubActor.create());
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RightSubActor.tell(new SubActor.PrintAndEvaluate(getContext().getSelf(),sub.right(), false));
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}
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else if (expression instanceof Expression.Mul mul) {
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this.operationString = "*";
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ActorRef<SubActor.Message> LeftSubActor = getContext().spawnAnonymous(SubActor.create());
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LeftSubActor.tell(new SubActor.PrintAndEvaluate(getContext().getSelf(),mul.left(), true));
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ActorRef<SubActor.Message> RightSubActor = getContext().spawnAnonymous(SubActor.create());
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RightSubActor.tell(new SubActor.PrintAndEvaluate(getContext().getSelf(),mul.right(), false));
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} else if (expression instanceof Expression.Val val) {
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logger.info(val.inner() + "");
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}
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return this;
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}
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Logger logger = Logger.getLogger(Actor.class.getName());
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//Antwort von dem rechten Kind. Wenn beide Seiten geantwortet haben, wird eine Sekunde gewartet und dann das Ergebnis
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//berechnet in Compute()
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private Behavior<Message> onLeftResponse(LeftResponse response){
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this.leftString = response.string;
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this.leftInt = response.wert;
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if(this.rightString != null){
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this.timer.startSingleTimer(new Compute(),Duration.ofSeconds(1));
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}
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return this;
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}
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//Antwort von dem rechten Kind. Wenn beide Seiten geantwortet haben, wird eine Sekunde gewartet und dann das Ergebnis
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//berechnet in Compute()
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private Behavior<Message> onRightResponse(RightResponse response){
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this.rightString = response.string;
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this.rightInt = response.wert;
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if(this.leftString != null){
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this.timer.startSingleTimer(new Compute(),Duration.ofSeconds(1));
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}
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return this;
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}
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private Behavior<Message> onComputeMessage(Compute response){
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if(operationString.equals("+")){
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logger.info("(" + leftString + operationString + rightString + ") Wert: " + (leftInt + rightInt));
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} else if (operationString.equals("-")) {
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logger.info("(" + leftString + operationString + rightString + ") Wert: " + (leftInt - rightInt));
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}else{
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logger.info("(" + leftString + operationString + rightString + ") Wert: " + (leftInt * rightInt));
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}
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return this;
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}
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}
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