feat: update Actor Model implementation with multi-actor logic and loose coupling iluwatar#3251

Author: ssrijan-007-sys

Diff for: actor-model/src/main/java/com/iluwatar/actormodel/Actor.java

@@ -24,16 +24,14 @@
  */
 package com.iluwatar.actormodel;
 
-import lombok.Getter;
-import lombok.Setter;
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.LinkedBlockingQueue;
+import lombok.Getter;
+import lombok.Setter;
 
 public abstract class Actor implements Runnable {
 
-  @Setter
-  @Getter
-  private String actorId;
+  @Setter @Getter private String actorId;
   private final BlockingQueue<Message> mailbox = new LinkedBlockingQueue<>();
   private volatile boolean active =
       true; // always read from main memory and written back to main memory,
@@ -50,7 +48,7 @@ public void stop() {
 
   @Override
   public void run() {
-    while ( active ) {
+    while (active) {
       try {
         Message message = mailbox.take(); // Wait for a message
         onReceive(message); // Process it

Diff for: actor-model/src/main/java/com/iluwatar/actormodel/ActorSystem.java

@@ -31,17 +31,17 @@
 
 public class ActorSystem {
   private final ExecutorService executor = Executors.newCachedThreadPool();
-  private final ConcurrentHashMap<String ,Actor > actorRegister = new ConcurrentHashMap<>();
+  private final ConcurrentHashMap<String, Actor> actorRegister = new ConcurrentHashMap<>();
   private final AtomicInteger idCounter = new AtomicInteger(0);
 
   public void startActor(Actor actor) {
-    String actorId = "actor-" + idCounter.incrementAndGet(); //Generate a new and unique ID
+    String actorId = "actor-" + idCounter.incrementAndGet(); // Generate a new and unique ID
     actor.setActorId(actorId); // assign the actor it's ID
-    actorRegister.put(actorId,actor); //Register and save the actor with it's ID
+    actorRegister.put(actorId, actor); // Register and save the actor with it's ID
     executor.submit(actor); // Run the actor in a thread
   }
 
-  public Actor getActorById(String actorId){
+  public Actor getActorById(String actorId) {
     return actorRegister.get(actorId); //  Find by Id
   }
 

Diff for: actor-model/src/main/java/com/iluwatar/actormodel/App.java

@@ -31,7 +31,7 @@ public static void main(String[] args) throws InterruptedException {
     system.startActor(srijan);
     Actor ansh = new ExampleActor2(system);
     system.startActor(ansh);
-    ansh.send(new Message("Hello Srijan" , srijan.getActorId()));
+    ansh.send(new Message("Hello Srijan", srijan.getActorId()));
     srijan.send(new Message("Hello ansh!", srijan.getActorId()));
 
     Thread.sleep(1000); // Give time for messages to process

Diff for: actor-model/src/main/java/com/iluwatar/actormodel/ExampleActor.java

@@ -27,21 +27,21 @@
 import java.util.logging.Logger;
 
 public class ExampleActor extends Actor {
-  private  final ActorSystem actorSystem;
+  private final ActorSystem actorSystem;
 
   public ExampleActor(ActorSystem actorSystem) {
     this.actorSystem = actorSystem;
   }
+
   Logger logger = Logger.getLogger(getClass().getName());
 
   @Override
   protected void onReceive(Message message) {
-    logger.info("[" +getActorId()+ "]" + "Received : " + message.getContent());
+    logger.info("[" + getActorId() + "]" + "Received : " + message.getContent());
 
-    Actor sender = actorSystem.getActorById(message.getSenderId());// sender actor id
-    if(sender!=null && !message.getSenderId().equals(getActorId())) {
+    Actor sender = actorSystem.getActorById(message.getSenderId()); // sender actor id
+    if (sender != null && !message.getSenderId().equals(getActorId())) {
       sender.send(new Message("I got your message ", getActorId()));
     }
-
   }
 }

Diff for: actor-model/src/main/java/com/iluwatar/actormodel/ExampleActor2.java

@@ -1,17 +1,42 @@
+/*
+ * This project is licensed under the MIT license. Module model-view-viewmodel is using ZK framework licensed under LGPL (see lgpl-3.0.txt).
+ *
+ * The MIT License
+ * Copyright © 2014-2022 Ilkka Seppälä
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
 package com.iluwatar.actormodel;
 
 import java.util.logging.Logger;
 
-public class ExampleActor2 extends Actor{
+public class ExampleActor2 extends Actor {
   private final ActorSystem actorSystem;
 
   public ExampleActor2(ActorSystem actorSystem) {
     this.actorSystem = actorSystem;
   }
+
   Logger logger = Logger.getLogger(getClass().getName());
 
   @Override
   protected void onReceive(Message message) {
-    logger.info("[" + getActorId()+"]" + "Received : " +message.getContent());
+    logger.info("[" + getActorId() + "]" + "Received : " + message.getContent());
   }
 }

Diff for: actor-model/src/main/java/com/iluwatar/actormodel/Message.java

@@ -33,7 +33,9 @@ public Message(String content, String senderId) {
     this.senderId = senderId;
   }
 
-  public String getContent() { return content; }
+  public String getContent() {
+    return content;
+  }
 
   public String getSenderId() {
     return senderId;