Fibonacci

This commit is contained in:
Christoph Stahl 2023-05-10 16:36:43 +02:00
parent 4d21a44a7e
commit 6f2af5f481
5 changed files with 122 additions and 37 deletions

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@ -24,10 +24,11 @@ public class AkkaMainSystem extends AbstractBehavior<AkkaMainSystem.Create> {
private Behavior<Create> onCreate(Create command) { private Behavior<Create> onCreate(Create command) {
//#create-actors //#create-actors
ActorRef<ExampleActor.Message> a = this.getContext().spawn(ExampleActor.create("Alice"), "alice"); ActorRef<FibCont.Message> c = this.getContext().spawn(C.create(), "c");
ActorRef<Fib.Message> fib = this.getContext().spawn(Fib.create(), "fib");
//#create-actors //#create-actors
a.tell(new ExampleActor.ExampleMessage(this.getContext().getSelf(),"Test123")); fib.tell(new Fib.FibMessage(7, c));
return this; return this;
} }
} }

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@ -0,0 +1,30 @@
package com.example;
import akka.actor.typed.Behavior;
import akka.actor.typed.javadsl.AbstractBehavior;
import akka.actor.typed.javadsl.ActorContext;
import akka.actor.typed.javadsl.Behaviors;
import akka.actor.typed.javadsl.Receive;
public class C extends AbstractBehavior<FibCont.Message> {
public static Behavior<FibCont.Message> create() {
return Behaviors.setup(C::new);
}
private C(ActorContext<FibCont.Message> context) {
super(context);
}
@Override
public Receive<FibCont.Message> createReceive() {
return newReceiveBuilder()
.onMessage(FibCont.FibContMessage.class, this::onFibContMessage)
.build();
}
private Behavior<FibCont.Message> onFibContMessage(FibCont.FibContMessage msg) {
getContext().getLog().info("{}", msg.n());
return this;
}
}

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@ -1,35 +0,0 @@
package com.example;
import akka.actor.typed.ActorRef;
import akka.actor.typed.Behavior;
import akka.actor.typed.javadsl.*;
public class ExampleActor extends AbstractBehavior<ExampleActor.Message> {
public interface Message {};
public record ExampleMessage(ActorRef<AkkaMainSystem.Create> someReference, String someString) implements Message { }
public static Behavior<Message> create(String name) {
return Behaviors.setup(context -> new ExampleActor(context, name));
}
private final String name;
private ExampleActor(ActorContext<Message> context, String name) {
super(context);
this.name = name;
}
@Override
public Receive<Message> createReceive() {
return newReceiveBuilder()
.onMessage(ExampleMessage.class, this::onExampleMessage)
.build();
}
private Behavior<Message> onExampleMessage(ExampleMessage msg) {
getContext().getLog().info("I ({}) got a message: ExampleMessage({},{})", this.name, msg.someReference, msg.someString);
return this;
}
}

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@ -0,0 +1,41 @@
package com.example;
import akka.actor.typed.ActorRef;
import akka.actor.typed.Behavior;
import akka.actor.typed.javadsl.AbstractBehavior;
import akka.actor.typed.javadsl.ActorContext;
import akka.actor.typed.javadsl.Behaviors;
import akka.actor.typed.javadsl.Receive;
public class Fib extends AbstractBehavior<Fib.Message> {
public interface Message {};
public record FibMessage(int n, ActorRef<FibCont.Message> cust) implements Message { }
public static Behavior<Message> create() {
return Behaviors.setup(Fib::new);
}
private Fib(ActorContext<Message> context) {
super(context);
}
@Override
public Receive<Message> createReceive() {
return newReceiveBuilder()
.onMessage(FibMessage.class, this::onFibMessage)
.build();
}
private Behavior<Message> onFibMessage(FibMessage msg) {
if(msg.n <= 1) {
msg.cust.tell(new FibCont.FibContMessage(msg.n));
} else {
ActorRef<FibCont.Message> cont = this.getContext().spawnAnonymous(FibCont.create(msg.cust));
this.getContext().getSelf().tell(new FibMessage(msg.n - 1, cont));
this.getContext().getSelf().tell(new FibMessage(msg.n - 2, cont));
}
return this;
}
}

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@ -0,0 +1,48 @@
package com.example;
import akka.actor.typed.ActorRef;
import akka.actor.typed.Behavior;
import akka.actor.typed.javadsl.AbstractBehavior;
import akka.actor.typed.javadsl.ActorContext;
import akka.actor.typed.javadsl.Behaviors;
import akka.actor.typed.javadsl.Receive;
public class FibCont extends AbstractBehavior<FibCont.Message> {
private boolean flag;
private int store;
public interface Message {};
public record FibContMessage(int n) implements Message { }
public static Behavior<Message> create(ActorRef<Message> cust) {
return Behaviors.setup(context -> new FibCont(context, cust));
}
private final ActorRef<Message> cust;
private FibCont(ActorContext<Message> context, ActorRef<Message> cust) {
super(context);
this.cust = cust;
this.flag = false;
this.store = 0;
}
@Override
public Receive<Message> createReceive() {
return newReceiveBuilder()
.onMessage(FibContMessage.class, this::onFibContMessage)
.build();
}
private Behavior<Message> onFibContMessage(FibContMessage msg) {
if (this.flag) {
this.cust.tell(new FibContMessage(this.store + msg.n));
} else {
this.flag = true;
this.store = msg.n;
}
return this;
}
}