Back-End of Astronaut Game Web Application 👨‍🚀

About the Game

• a back-end system of a web flash game about an astronaut trying to collect some doughnuts floating in space while some lava rocks are also floating.
• Collision with doughnuts 🍩 will add 5 points to his life, while collision with a lava rock 🔥 will take 20 points from his life.
• The astronaut should try to collect as much doughnuts 🍩 as possible as the score depends the most on the maximum number of collected food all over the played games.
• He also should also take care of his life; as the score depends on it in case equality of the previous aspect ⚡.

About The Application

• The Game is developed using Spring Boot Framework 🍃

• Design Patterns Applied:

  • Flyweight Design pattern .. for movables
  • Singleton Design Pattern ... when dealing with resources and factories
  • Bridge Design Pattern ... for moving the missles
  • Factory Method Design Pattern ... for producing the missles
  • Facade Design Pattern ... for dealing with Gson Library

• Techs used And Principles followed:

  • Java Threads and Synchronization .. to control movables
  • DB connection and JPA .. to save users, and their rankings
  • WebSocket and Http protocols .. during the game loop
    1. sending movables position, and astronaut life
    2. receiving astronaut position, browser window dimensions, JWT token
  • Spring Security using JWT
  • Resttemplate .. to save the game
  • Gson Serialization and Deserialization
  • Dependency Inversion
  • Newton's law for curve Interpolation .. used to make the path of the movables

  Class Diagrams (uploaded as SVG with the source code)

  • Registration Class Diagram
  • Game Class Diagram

  Note: I know it is not a good design decision to use threads at the backend, but this project is just a practice on the pre-mentioned techs