Blatt 03

src/main/java/com/example/AkkaMainSystem.java

@@ -23,12 +23,21 @@ public class AkkaMainSystem extends AbstractBehavior<AkkaMainSystem.Create> {
     }
 
     private Behavior<Create> onCreate(Create command) {
-        //#create-actors
-        ActorRef<ExampleActor.Message> a = this.getContext().spawn(ExampleActor.create("Alice"), "alice");
-        ActorRef<ExampleTimerActor.Message> b = this.getContext().spawn(ExampleTimerActor.create(), "timeractor");
-        //#create-actors
+        // Factorial
+        var factorialReceiver = this.getContext().spawn(FactorialReceiver.create(), "FactorialReceiver");
+        var factorial = this.getContext().spawn(Factorial.create(), "Factorial");
+        factorial.tell(new Factorial.FactorialMsg(5, factorialReceiver));
+
+        // GCD
+        var gcdReceiver = this.getContext().spawn(GCDReceiver.create(), "GCDReceiver");
+        var gcd = this.getContext().spawn(GCD.create(), "GCD");
+        gcd.tell(new GCD.GCDMessage(127, 74, gcdReceiver));
+
+        // Fibonacci
+        var fibonacciReceiver = this.getContext().spawn(FibonacciReceiver.create(), "FibonacciReceiver");
+        var fibonacci = this.getContext().spawn(Fibonacci.create(), "Fibonacci");
+        fibonacci.tell(new Fibonacci.FibonacciMessage(7, fibonacciReceiver));
 
-        a.tell(new ExampleActor.ExampleMessage(this.getContext().getSelf(),"Test123"));
         return this;
     }
 }

src/main/java/com/example/ExampleActor.java

@@ -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;
-    }
-}

src/main/java/com/example/ExampleTimerActor.java

@@ -1,45 +0,0 @@
-package com.example;
-
-import akka.actor.typed.javadsl.TimerScheduler;
-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;
-
-import java.time.Duration;
-
-
-public class ExampleTimerActor extends AbstractBehavior<ExampleTimerActor.Message> {
-
-    public interface Message {};
-
-
-    public record ExampleMessage(String someString) implements Message {  }
-
-    public static Behavior<Message> create() {
-        return Behaviors.setup(context -> Behaviors.withTimers(timers -> new ExampleTimerActor(context, timers)));
-    }
-
-    private final TimerScheduler<ExampleTimerActor.Message> timers;
-
-    private ExampleTimerActor(ActorContext<Message> context, TimerScheduler<ExampleTimerActor.Message> timers) {
-        super(context);
-        this.timers = timers;
-
-        Message msg = new ExampleMessage("test123");
-        this.timers.startSingleTimer(msg, msg, Duration.ofSeconds(10));
-    }
-
-    @Override
-    public Receive<Message> createReceive() {
-        return newReceiveBuilder()
-                .onMessage(ExampleMessage.class, this::onExampleMessage)
-                .build();
-    }
-
-    private Behavior<Message> onExampleMessage(ExampleMessage msg) {
-        getContext().getLog().info("I have send myself this message after 10 Seconds: {}", msg.someString);
-        return this;
-    }
-}

src/main/java/com/example/Factorial.java

@@ -0,0 +1,43 @@
+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;
+
+import java.util.UUID;
+
+public class Factorial extends AbstractBehavior<Factorial.Message> {
+
+    public interface Message {};
+
+    public record FactorialMsg(int val, ActorRef<FactorialCont.Message> cust) implements Message {  }
+
+    public static Behavior<Message> create() {
+        return Behaviors.setup(Factorial::new);
+    }
+
+    private Factorial(ActorContext<Message> context) {
+        super(context);
+    }
+
+    @Override
+    public Receive<Message> createReceive() {
+        return newReceiveBuilder()
+                .onMessage(FactorialMsg.class, this::onMsg)
+                .build();
+    }
+
+    private Behavior<Message> onMsg(FactorialMsg msg) {
+        if (msg.val == 0){
+            msg.cust.tell(new FactorialCont.FactorialContMsg(1));
+        } else {
+            var cont = this.getContext().spawn(FactorialCont.create(msg.val, msg.cust), UUID.randomUUID().toString());
+            this.getContext().getSelf().tell(new FactorialMsg(msg.val - 1, cont));
+        }
+
+        return this;
+    }
+}

src/main/java/com/example/FactorialCont.java

@@ -0,0 +1,40 @@
+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 FactorialCont extends AbstractBehavior<FactorialCont.Message> {
+
+    private final ActorRef<Message> cust;
+    private final int val;
+
+    public interface Message {};
+
+    public record FactorialContMsg(int arg) implements Message {  }
+
+    public static Behavior<Message> create(int val, ActorRef<FactorialCont.Message> cust) {
+        return Behaviors.setup(context -> new FactorialCont(context, val, cust));
+    }
+
+    private FactorialCont(ActorContext<Message> context, int val, ActorRef<Message> cust) {
+        super(context);
+        this.val = val;
+        this.cust = cust;
+    }
+
+    @Override
+    public Receive<Message> createReceive() {
+        return newReceiveBuilder()
+                .onMessage(FactorialContMsg.class, this::onMsg)
+                .build();
+    }
+
+    private Behavior<Message> onMsg(FactorialContMsg msg) {
+        this.cust.tell(new FactorialContMsg(this.val * msg.arg));
+        return this;
+    }
+}

src/main/java/com/example/FactorialReceiver.java

@@ -0,0 +1,31 @@
+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 FactorialReceiver extends AbstractBehavior<FactorialCont.Message> {
+
+    public static Behavior<FactorialCont.Message> create() {
+        return Behaviors.setup(FactorialReceiver::new);
+    }
+
+
+    private FactorialReceiver(ActorContext<FactorialCont.Message> context) {
+        super(context);
+    }
+
+    @Override
+    public Receive<FactorialCont.Message> createReceive() {
+        return newReceiveBuilder()
+                .onMessage(FactorialCont.FactorialContMsg.class, this::onMsg)
+                .build();
+    }
+
+    private Behavior<FactorialCont.Message> onMsg(FactorialCont.FactorialContMsg msg) {
+        this.getContext().getLog().info("Factorial: {}", msg.arg());
+        return this;
+    }
+}

src/main/java/com/example/Fibonacci.java

@@ -0,0 +1,44 @@
+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;
+
+import java.util.UUID;
+
+public class Fibonacci extends AbstractBehavior<Fibonacci.Message> {
+
+    public interface Message {};
+
+    public record FibonacciMessage(int n, ActorRef<FibonacciCont.Message> cust) implements Message {  }
+
+    public static Behavior<Message> create() {
+        return Behaviors.setup(Fibonacci::new);
+    }
+
+
+    private Fibonacci(ActorContext<Message> context) {
+        super(context);
+    }
+
+    @Override
+    public Receive<Message> createReceive() {
+        return newReceiveBuilder()
+                .onMessage(FibonacciMessage.class, this::onExampleMessage)
+                .build();
+    }
+
+    private Behavior<Message> onExampleMessage(FibonacciMessage msg) {
+        if (msg.n <= 1) {
+            msg.cust.tell(new FibonacciCont.FibonacciContMessage(msg.n));
+        } else {
+            var cont = this.getContext().spawn(FibonacciCont.create(-1, msg.cust), UUID.randomUUID().toString());
+            this.getContext().getSelf().tell(new FibonacciMessage(msg.n - 1, cont));
+            this.getContext().getSelf().tell(new FibonacciMessage(msg.n - 2, cont));
+        }
+        return this;
+    }
+}

src/main/java/com/example/FibonacciCont.java

@@ -0,0 +1,45 @@
+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 FibonacciCont extends AbstractBehavior<FibonacciCont.Message> {
+
+    private final ActorRef<Message> cust;
+
+    public interface Message {};
+
+    public record FibonacciContMessage(int result) implements Message {  }
+
+    public static Behavior<Message> create(int first_value, ActorRef<Message> cust) {
+        return Behaviors.setup(context -> new FibonacciCont(context, first_value, cust));
+    }
+
+    private final int first_value;
+
+    private FibonacciCont(ActorContext<Message> context, int first_value, ActorRef<Message> cust) {
+        super(context);
+        this.first_value = first_value;
+        this.cust = cust;
+    }
+
+    @Override
+    public Receive<Message> createReceive() {
+        return newReceiveBuilder()
+                .onMessage(FibonacciContMessage.class, this::onExampleMessage)
+                .build();
+    }
+
+    private Behavior<Message> onExampleMessage(FibonacciContMessage msg) {
+        if (this.first_value == -1) {
+            return FibonacciCont.create(msg.result, this.cust);
+        } else {
+            this.cust.tell(new FibonacciContMessage(msg.result + this.first_value));
+        }
+        return this;
+    }
+}

src/main/java/com/example/FibonacciReceiver.java

@@ -0,0 +1,32 @@
+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 FibonacciReceiver extends AbstractBehavior<FibonacciCont.Message> {
+
+
+    public static Behavior<FibonacciCont.Message> create() {
+        return Behaviors.setup(FibonacciReceiver::new);
+    }
+
+
+    private FibonacciReceiver(ActorContext<FibonacciCont.Message> context) {
+        super(context);
+    }
+
+    @Override
+    public Receive<FibonacciCont.Message> createReceive() {
+        return newReceiveBuilder()
+                .onMessage(FibonacciCont.FibonacciContMessage.class, this::onExampleMessage)
+                .build();
+    }
+
+    private Behavior<FibonacciCont.Message> onExampleMessage(FibonacciCont.FibonacciContMessage msg) {
+        getContext().getLog().info("Fibonacci: {}",msg.result());
+        return this;
+    }
+}

src/main/java/com/example/GCD.java

@@ -0,0 +1,40 @@
+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 GCD extends AbstractBehavior<GCD.Message> {
+
+    public interface Message {};
+
+    public record GCDMessage(int a, int b, ActorRef<GCDReceiver.Message> cust) implements Message {  }
+
+    public static Behavior<Message> create() {
+        return Behaviors.setup(GCD::new);
+    }
+
+
+    private GCD(ActorContext<Message> context) {
+        super(context);
+    }
+
+    @Override
+    public Receive<Message> createReceive() {
+        return newReceiveBuilder()
+                .onMessage(GCDMessage.class, this::onMsg)
+                .build();
+    }
+
+    private Behavior<Message> onMsg(GCDMessage msg) {
+        if (msg.b == 0) {
+            msg.cust.tell(new GCDReceiver.GCDResult(msg.a));
+        } else {
+            this.getContext().getSelf().tell(new GCDMessage(msg.b, msg.a % msg.b, msg.cust));
+        }
+        return this;
+    }
+}

src/main/java/com/example/GCDReceiver.java

@@ -0,0 +1,35 @@
+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 GCDReceiver extends AbstractBehavior<GCDReceiver.Message> {
+
+    public interface Message {};
+
+    public record GCDResult(int result) implements Message {  }
+
+    public static Behavior<Message> create() {
+        return Behaviors.setup(GCDReceiver::new);
+    }
+
+
+    private GCDReceiver(ActorContext<Message> context) {
+        super(context);
+    }
+
+    @Override
+    public Receive<Message> createReceive() {
+        return newReceiveBuilder()
+                .onMessage(GCDResult.class, this::onResult)
+                .build();
+    }
+
+    private Behavior<Message> onResult(GCDResult msg) {
+        getContext().getLog().info("GCD: {}", msg.result);
+        return this;
+    }
+}