Blatt 02
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@ -4,6 +4,9 @@ import akka.actor.typed.ActorRef;
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import akka.actor.typed.Behavior;
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import akka.actor.typed.Behavior;
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import akka.actor.typed.javadsl.*;
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import akka.actor.typed.javadsl.*;
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import java.util.ArrayList;
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import java.util.Arrays;
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public class AkkaMainSystem extends AbstractBehavior<AkkaMainSystem.Create> {
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public class AkkaMainSystem extends AbstractBehavior<AkkaMainSystem.Create> {
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public static class Create {
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public static class Create {
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@ -24,11 +27,15 @@ public class AkkaMainSystem extends AbstractBehavior<AkkaMainSystem.Create> {
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private Behavior<Create> onCreate(Create command) {
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private Behavior<Create> onCreate(Create command) {
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//#create-actors
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//#create-actors
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ActorRef<ExampleActor.Message> a = this.getContext().spawn(ExampleActor.create("Alice"), "alice");
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var alice = this.getContext().spawn(RelayBot.create("alice"), "alice");
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ActorRef<ExampleTimerActor.Message> b = this.getContext().spawn(ExampleTimerActor.create(), "timeractor");
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var bob = this.getContext().spawn(RelayBot.create("bob"), "bob");
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var charlie = this.getContext().spawn(RelayBot.create("charlie"), "charlie");
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var reihenfolge = new ArrayList<>(Arrays.asList(bob, charlie, alice));
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alice.tell(new RelayBot.Start(reihenfolge));
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//#create-actors
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//#create-actors
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a.tell(new ExampleActor.ExampleMessage(this.getContext().getSelf(),"Test123"));
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return this;
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return this;
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}
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}
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}
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}
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@ -1,35 +0,0 @@
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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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public class ExampleActor extends AbstractBehavior<ExampleActor.Message> {
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public interface Message {};
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public record ExampleMessage(ActorRef<AkkaMainSystem.Create> someReference, String someString) implements Message { }
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public static Behavior<Message> create(String name) {
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return Behaviors.setup(context -> new ExampleActor(context, name));
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}
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private final String name;
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private ExampleActor(ActorContext<Message> context, String name) {
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super(context);
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this.name = name;
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}
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@Override
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public Receive<Message> createReceive() {
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return newReceiveBuilder()
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.onMessage(ExampleMessage.class, this::onExampleMessage)
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.build();
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}
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private Behavior<Message> onExampleMessage(ExampleMessage msg) {
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getContext().getLog().info("I ({}) got a message: ExampleMessage({},{})", this.name, msg.someReference, msg.someString);
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return this;
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}
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}
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@ -1,45 +0,0 @@
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package com.example;
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import akka.actor.typed.javadsl.TimerScheduler;
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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 java.time.Duration;
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public class ExampleTimerActor extends AbstractBehavior<ExampleTimerActor.Message> {
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public interface Message {};
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public record ExampleMessage(String someString) implements Message { }
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public static Behavior<Message> create() {
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return Behaviors.setup(context -> Behaviors.withTimers(timers -> new ExampleTimerActor(context, timers)));
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}
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private final TimerScheduler<ExampleTimerActor.Message> timers;
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private ExampleTimerActor(ActorContext<Message> context, TimerScheduler<ExampleTimerActor.Message> timers) {
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super(context);
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this.timers = timers;
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Message msg = new ExampleMessage("test123");
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this.timers.startSingleTimer(msg, msg, Duration.ofSeconds(10));
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}
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@Override
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public Receive<Message> createReceive() {
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return newReceiveBuilder()
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.onMessage(ExampleMessage.class, this::onExampleMessage)
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.build();
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}
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private Behavior<Message> onExampleMessage(ExampleMessage msg) {
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getContext().getLog().info("I have send myself this message after 10 Seconds: {}", msg.someString);
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return this;
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}
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}
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@ -0,0 +1,55 @@
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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.util.ArrayList;
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import java.util.List;
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public class RelayBot extends AbstractBehavior<RelayBot.Message> {
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public interface Message {};
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public record Hello(List<ActorRef<RelayBot.Message>> reihenfolge, int count) implements Message { }
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public record Start(List<ActorRef<Message>> reihenfolge) implements Message { }
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public static Behavior<Message> create(String name) {
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return Behaviors.setup(context -> new RelayBot(context, name));
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}
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private final String name;
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private RelayBot(ActorContext<Message> context, String name) {
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super(context);
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this.name = name;
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}
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@Override
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public Receive<Message> createReceive() {
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return newReceiveBuilder()
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.onMessage(Hello.class, this::onHello)
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.onMessage(Start.class, this::onStart)
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.build();
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}
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private Behavior<Message> onStart(Start msg) {
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var next_hop = msg.reihenfolge.remove(0);
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var new_reihenfolge = new ArrayList<>(msg.reihenfolge);
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new_reihenfolge.add(next_hop);
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next_hop.tell(new Hello(new_reihenfolge, 1));
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return this;
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}
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private Behavior<Message> onHello(Hello msg) {
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if (msg.count > 15) {
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return Behaviors.stopped();
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}
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getContext().getLog().info("I, {}, got Hello ({})", this.name, msg.count);
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var next_hop = msg.reihenfolge.remove(0);
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var new_reihenfolge = new ArrayList<>(msg.reihenfolge);
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new_reihenfolge.add(next_hop);
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next_hop.tell(new Hello(new_reihenfolge, msg.count + 1));
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return this;
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}
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}
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