2. Server Side

2.1. Outline of Server-side System

2.1 - 1. Non-DB Server System

• Device and environment :
  Eclipse Neon under MacOS (Sierra, 10.12) and WindowsOS(10)

• Features :
  It will communicates with Client-side system with TCP based Sockets and I/O Streams.
  It also store a list of user that currently joined in server, with each user's ID, Nick name and I/O Stream instances.
  With this informations,

  1. Server will send and broadcast messages to appropriate users,
  2. and will get the state of user that if user is in-game or not.

• In-Game Jobs :
  Server will provide a initial word for word relaying system and will get a result if one of users is lose.
  According to result, server will consider if they have to play remain game or not.
  Finally, if game is end, server will send a message to deleting a file to loser.
  When loser got that message, loser will delete its own random file.

2.1 - 2. DB Server System

• Used DB :
  MariaDB
• Device and environment :
  Synology NAS & phpMyAdmin & MySQL
• Features :
  When user register to game system, DB will store its data with column [ID, PW, NICK] that contains user's ID, Password and nick-name.
  Furthermore, It will store win/lose counts of specific user, with column [ID, WIN, LOSE] that contains ID, win counts and lose counts. With this DB, we will implement a ranking system.
• DB hierarchy :
  There are two tables under one database.

2.2. Instruction of classes in Server project

• Data package

  • Room.java
    This class is Data Type class to save a room information and users of current room. It also saved the title and number of it.
  • User.java
    This class is Data Type class to save a user information that currently joining in server.

• RoomServer Package

  • RoomManager.java
    This class is a process class to manage a specific room, take care of its users and broadcasts appropriate messages to the room.
  • Server.java
    This class is a main running class that initialize a socket of server and processing a information about specific users or rooms.
  • UserHandler.java
    This class is a main running class that implements a thread linked with a specific user that joining in the server. It will communicates with the user and processing jobs that the user requests.