Implement Actor Model pattern #3232Actor model

[ssrijan-007-sys]

Description

This PR adds an implementation of the Actor Model pattern in Java as part of the ongoing effort to expand the collection of design patterns in this repository.

What's Included:

• src/: Core Java classes implementing the Actor Model (Actor, Message, ActorSystem, PrinterActor, and App)
• README.md: Description of the pattern, explanation, example usage, and when to apply
• etc/: UML class diagram in both .png and .urm.puml format
• pom.xml: Maven module configuration
• Added the pattern module to the root pom.xml

Closes #3232

Checklist ✅

• Code follows the Google Java Style Guide
• Code formatted using the Spotless Maven plugin (./mvnw spotless:apply)
• Pattern directory includes:
  • src/
  • README.md
  • etc/ with diagrams
  • pom.xml
• Pattern added to parent pom.xml
• All links in README.md are relative
• Project compiles successfully using ./mvnw clean install

---

Let me know if there are any required changes or improvements. I'm happy to collaborate and iterate!

[github-actions]

PR Summary

This PR implements the Actor Model pattern in Java. It includes core classes (Actor, Message, ActorSystem), a sample application (App), UML diagrams, and a comprehensive README.

Changes

File	Summary
actor-model/README.md	This file provides a detailed explanation of the Actor Model pattern, including its intent, explanation, class diagram, participants, applicability, and an example.
actor-model/etc/actor-model.urm.puml	This file contains a PlantUML class diagram that visually represents the structure and relationships of the classes in the Actor Model implementation.
actor-model/etc/actor_model-Actor_Model___UML_Class_Diagram.png	This file is a PNG image of the UML class diagram for the Actor Model, providing a visual representation of the classes and their relationships.
actor-model/pom.xml	This file configures the Maven project for the Actor Model module, defining dependencies and project metadata.
actor-model/src/main/java/com/iluwatar/actormodel/Actor.java	This class defines the Actor base class, which handles incoming messages sequentially using a mailbox. It includes methods for sending messages and stopping the actor.
actor-model/src/main/java/com/iluwatar/actormodel/ActorSystem.java	This class implements the ActorSystem, which creates and manages actors. It uses an executor service for concurrent execution and a concurrent hash map for actor registration.
actor-model/src/main/java/com/iluwatar/actormodel/App.java	This class demonstrates the usage of the Actor Model pattern with two example actors that exchange messages.
actor-model/src/main/java/com/iluwatar/actormodel/ExampleActor.java	This class is an example implementation of an actor that logs received messages and responds to them.
actor-model/src/main/java/com/iluwatar/actormodel/ExampleActor2.java	This class is a second example actor implementation that simply logs received messages.
actor-model/src/main/java/com/iluwatar/actormodel/Message.java	This class represents a message exchanged between actors, containing the message content and sender ID.
pom.xml	The root pom.xml file was modified to include the newly added actor-model module.

---

autogenerated by presubmit.ai

[github-actions]

✅ LGTM!

Review Summary

Commits Considered (2)

• 3ee44ea: feat: Implement Actor Model pattern #3232
• f543057: feat: Implement Actor Model pattern #3232

Files Processed (10)

• actor-model/README.md (1 hunk)
• actor-model/etc/actor-model.urm.puml (1 hunk)
• actor-model/etc/actor_model-Actor_Model___UML_Class_Diagram.png (0 hunks)
• actor-model/pom.xml (1 hunk)
• actor-model/src/main/java/com/iluwatar/actormodel/Actor.java (1 hunk)
• actor-model/src/main/java/com/iluwatar/actormodel/ActorSystem.java (1 hunk)
• actor-model/src/main/java/com/iluwatar/actormodel/App.java (1 hunk)
• actor-model/src/main/java/com/iluwatar/actormodel/ExampleActor.java (1 hunk)
• actor-model/src/main/java/com/iluwatar/actormodel/Message.java (1 hunk)
• pom.xml (2 hunks)

Actionable Comments (0)

Skipped Comments (0)

[sonarqubecloud]

Quality Gate failed

Failed conditions
12.8% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud

[github-actions]

✅ LGTM!

Review Summary

Commits Considered (1)

• 11abf48: feat: update Actor Model implementation with multi-actor logic #3251

Files Processed (7)

• actor-model/src/main/java/com/iluwatar/actormodel/Actor.java (1 hunk)
• actor-model/src/main/java/com/iluwatar/actormodel/ActorSystem.java (1 hunk)
• actor-model/src/main/java/com/iluwatar/actormodel/App.java (1 hunk)
• actor-model/src/main/java/com/iluwatar/actormodel/ExampleActor.java (1 hunk)
• actor-model/src/main/java/com/iluwatar/actormodel/ExampleActor2.java (1 hunk)
• actor-model/src/main/java/com/iluwatar/actormodel/Message.java (1 hunk)
• pom.xml (2 hunks)

Actionable Comments (0)

Skipped Comments (0)

[github-actions]

✅ LGTM!

Review Summary

Commits Considered (1)

• dd1dcdd: Merge branch 'iluwatar:master' into actor-model

Files Processed (0)

Actionable Comments (0)

Skipped Comments (0)