src/main/java/com/example/SubActor.java gelöscht
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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.*;
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import java.time.Duration;
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import java.util.Objects;
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public class SubActor extends AbstractBehavior<SubActor.Message> {
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//Timer, um bei den Berechnungen eine Sekunde lang zu warten
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TimerScheduler<Message> timer;
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Expression expression;
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//Zeichen für die Operation (Add, Sub, Mul) welche benutzt wird
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String operationString;
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//Referenz auf den initialen Actor
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ActorRef<Actor.Message> initial;
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//Referenz auf den (potenziellen) OberSubActor. Es ist immer entweder initial oder oberActor null.
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ActorRef<SubActor.Message> oberActor;
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//Linke Seite: true, Rechte Seite: false um zu wissen welche Seite des Ausdrucks berechnet wird.
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boolean side;
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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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public interface Message {}
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//Message kommt von dem initialen Actor
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public record PrintAndEvaluate(ActorRef<Actor.Message> sender,Expression expression, Boolean side) implements Message{ }
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//Message kommt von einem anderen SubActor
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public record SubPrintAndEvaluate(ActorRef<SubActor.Message> sender,Expression expression, Boolean side) 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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//Nachricht an sich selbst, um nach einer Sekunde Wartezeit das Ergebnis zu berechnen
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public record Compute() implements Message{}
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private SubActor(ActorContext<SubActor.Message> context, TimerScheduler<Message> timer){
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super(context);
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this.timer = timer;
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}
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public static Behavior<SubActor.Message> create(){
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return Behaviors.setup(context -> Behaviors.withTimers(timers -> new SubActor(context,timers)));
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}
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@Override
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public Receive<SubActor.Message> createReceive(){
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return newReceiveBuilder()
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.onMessage(PrintAndEvaluate.class, this::onPrintAndEvaluate)
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.onMessage(SubPrintAndEvaluate.class, this::onSubPrintAndEvaluate)
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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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//Die Nachricht von dem initialen Actor wird verarbeitet.
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//Dabei wird seine Referenz in @initial gespeichert
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public Behavior<Message> onPrintAndEvaluate(PrintAndEvaluate message) {
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this.initial = message.sender;
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this.expression = message.expression;
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this.side = message.side;
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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<Message> subActorLeft = getContext().spawnAnonymous(SubActor.create());
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subActorLeft.tell(new SubPrintAndEvaluate(getContext().getSelf(), add.left(), true));
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ActorRef<Message> subActorRight = getContext().spawnAnonymous(SubActor.create());
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subActorRight.tell(new SubPrintAndEvaluate(getContext().getSelf(), add.right(), false));
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} else if (expression instanceof Expression.Sub sub) {
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this.operationString = "-";
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ActorRef<Message> subActorLeft = getContext().spawnAnonymous(SubActor.create());
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subActorLeft.tell(new SubPrintAndEvaluate(getContext().getSelf(),sub.left(), true));
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ActorRef<Message> subActorRight = getContext().spawnAnonymous(SubActor.create());
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subActorRight.tell(new SubPrintAndEvaluate(getContext().getSelf(),sub.right(), false));
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} else if (expression instanceof Expression.Mul mul) {
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this.operationString = "*";
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ActorRef<Message> subActorLeft = getContext().spawnAnonymous(SubActor.create());
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subActorLeft.tell(new SubPrintAndEvaluate(getContext().getSelf(),mul.left(), true));
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ActorRef<Message> subActorRight = getContext().spawnAnonymous(SubActor.create());
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subActorRight.tell(new SubPrintAndEvaluate(getContext().getSelf(),mul.right(), false));
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} else if (expression instanceof Expression.Val val) {
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if(side == true){
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initial.tell(new Actor.LeftResponse(String.valueOf(val.inner()), val.inner()));
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}else{
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initial.tell(new Actor.RightResponse(String.valueOf(val.inner()), val.inner()));
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}
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}
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return this;
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}
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//Nachricht von dem SubActor, von welchem dieser SubActor erstellt wurde, wird verarbeitet.
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//Dabei wird seine Referenz in oberActor gespeichert.
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public Behavior<Message> onSubPrintAndEvaluate(SubPrintAndEvaluate message){
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this.oberActor = message.sender;
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this.expression = message.expression;
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this.side = message.side;
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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<Message> subActorLeft = getContext().spawnAnonymous(SubActor.create());
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subActorLeft.tell(new SubPrintAndEvaluate(getContext().getSelf(),add.left(), true));
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ActorRef<Message> subActorRight = getContext().spawnAnonymous(SubActor.create());
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subActorRight.tell(new SubPrintAndEvaluate(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<Message> subActorLeft = getContext().spawnAnonymous(SubActor.create());
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subActorLeft.tell(new SubPrintAndEvaluate(getContext().getSelf(),sub.left(), true));
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ActorRef<Message> subActorRight = getContext().spawnAnonymous(SubActor.create());
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subActorRight.tell(new SubPrintAndEvaluate(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<Message> subActorLeft = getContext().spawnAnonymous(SubActor.create());
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subActorLeft.tell(new SubPrintAndEvaluate(getContext().getSelf(),mul.left(), true));
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ActorRef<Message> subActorRight = getContext().spawnAnonymous(SubActor.create());
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subActorRight.tell(new SubPrintAndEvaluate(getContext().getSelf(),mul.right(), false));
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} else if (expression instanceof Expression.Val val) {
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if(side == true){
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oberActor.tell(new SubActor.LeftResponse(String.valueOf(val.inner()), val.inner()));
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}else{
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oberActor.tell(new SubActor.RightResponse(String.valueOf(val.inner()), val.inner()));
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}
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}
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return this;
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}
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public 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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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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public 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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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 (oberActor != null) {
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//side == true bedeutet, dass dieser Actor das linke Kind ist und es wird LeftResponse geschickt
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if (side == true) {
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if (operationString.equals("+")) {
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oberActor.tell(new LeftResponse("(" + leftString + operationString + rightString + ")",
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leftInt + rightInt));
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} else if (operationString.equals("-")) {
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oberActor.tell(new LeftResponse("(" + leftString + operationString + rightString + ")",
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leftInt - rightInt));
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} else {
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oberActor.tell(new LeftResponse("(" + leftString + operationString + rightString + ")",
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leftInt * rightInt));
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}
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} else {
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if (operationString.equals("+")) {
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oberActor.tell(new RightResponse("(" + leftString + operationString + rightString + ")",
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leftInt + rightInt));
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} else if (operationString.equals("-")) {
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oberActor.tell(new RightResponse("(" + leftString + operationString + rightString + ")",
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leftInt - rightInt));
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} else {
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oberActor.tell(new RightResponse("(" + leftString + operationString + rightString + ")",
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leftInt * rightInt));
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}
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}
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} else {
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if (side == true) {
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if (operationString.equals("+")) {
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initial.tell(new Actor.LeftResponse("(" + leftString + operationString + rightString + ")",
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leftInt + rightInt));
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} else if (operationString.equals("-")) {
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initial.tell(new Actor.LeftResponse("(" + leftString + operationString + rightString + ")",
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leftInt - rightInt));
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} else {
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initial.tell(new Actor.LeftResponse("(" + leftString + operationString + rightString + ")",
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leftInt * rightInt));
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}
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} else {
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if (operationString.equals("+")) {
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initial.tell(new Actor.RightResponse("(" + leftString + operationString + rightString + ")",
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leftInt + rightInt));
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} else if (operationString.equals("-")) {
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initial.tell(new Actor.RightResponse("(" + leftString + operationString + rightString + ")",
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leftInt - rightInt));
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} else {
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initial.tell(new Actor.RightResponse("(" + leftString + operationString + rightString + ")",
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leftInt * rightInt));
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}
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}
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}
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return this;
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}
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}
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