This document summarizes an architecture for a multiplayer online game. It includes three main systems: an object management system to organize game data, an auto synchronization framework to keep server and client data in sync, and a network message dispatching system for server-client communication. It was developed over 12 months by a team of 3 system developers and 4 game developers to support a room-based social game with a web-based Unity3D client.

2. • Happy Me
• Architecture Overview
• Architecture Detail
Object Management System
Server-Client Data Synchronization
Network Message Dispatching System

4. • MMO casual game
• Room-based active server
• Web-based Unity3D client
• Run on social platform

6. • 3 system and framework developers
• 4 game developers
• 12 months of development

8. Database
Game Servers
Client
Internet

9. Server Side Client Side
Game Logic
Player
Data
Player
Data
Player
Data

11. Object
Management
System
Network Message
Dispatching
System
Auto
Synchronization
Framework
MAKE OUR LIFE EASIER

12. • Object management system
 MVC design pattern
 Dynamic data
• Auto synchronization framework
 Truly automatic («Set» and forget style)
 Synchronize the delta difference only
• Network message dispatching system
 Custom structure message
 Easy to register messages and invoke handlers

14. Model
View
Controller
(gameplay logic)
Database
Network
Messages
View
Controller
(graphic logic)
Server Side Client Side Unity3D
3D
Models
Database
Model

15. Model
View
Controller
Game
Objects
Object
Views
Game
Logic
Modules
Rooms

16. Game
Objects
Object
Views
Game
Logic
No-SQL
(Storage)
Network
Messages
Object
Views
Graphic
Logic
Server Side Client Side
SQL
(Ranking, Log)
Database
Game
Objects
Modules Modules
Rooms Rooms

17. Object
Rooms
Object
Views
Modules
Game
Objects

18. • A container of properties
• Serialize to and deserialize from JSON
• Hierarchy relationship (parent-child)

19. Object
Guid
Property 1
Property 2
Property Meta Data
• Tags
• Persistent
• Client transfer
• Type
• Long
• Name
• “property 2”
• Version
• 568

21. Object
Unit
GameObject
DataObject
Player
DecoItem
Pet
UseItem
ClothItem
Item
Quest
Job
PlayerViewDecoView PetView
ObjectView
Module
MainGame
Authen
HomeDeco
SyncData Room
Lobby Public Personal
Object
Manager

22. Pros
• MVC design pattern practice
• Fully customizable property system
• Manage game world into one single
system
Cons
• Challenge to manage huge number of
objects

24. Server
RoomPlayer.Position = (10, 20)
Player.OnUpdatePosition(10, 20)
{
model.MoveTo(10, 20);
}
Client

25. Synchronization
Scheduler
Other
Schedulers
Message
Processor
ROOM
• Process messages
from clients
• Send or broadcast
messages to clients
• Synchronize data
changes between
server and clients
• Update status
• Other duties…

26. Personal
Room
Coffee
Room
Downtown
Room
Sync
Other
Sync
Thread Pool
Other
Sync
Other
Sync
Sync
Other
ROOMS
TASK
QUEUES
WORKERS

27. Thread
1 second
SYNCHRONIZATION
SCHEDULER
OTHERS SCHEDULER
1/10 second
Other Task
Sync Task
Sync Task
Other Task
Sync
Task
Other
Task
TASK QUEUE
WORKER

28. Object
Position
Energy
Gold
Change Set
SYNCHRONIZATION
SCHEDULER
SetProperty(Position, (1, 2))
Sync
Task

29. Pros
• Automatic synchronization property changes
• Optimal data transfer
• Best use for active server game
Cons
• Overhead to determine what has changed
since last sync.

31. Login
- Username
- Password
Synchronize
- Type
- Properties
Buy Item
- ItemType
- Quantity
Chat
- Message
RequestFriend
- FriendGuid
Serializer
(Thrift, Protobuf, Json, XML)
Network package
Encryption

32. Server
Send
Client
Receive
Serialize
Deserialize
Login
- Username
- Password
Login
- Username
- Password
OnAuthen
OnMove
OnRun
Login
Authen
Move
Run
Message
Handlers
OnLogin

33. Pros
• Meaningful message by define custom
structure
• Familiar usage as common GUI system
(MFC, WinForm)
• Share message definition between server
and client
• Easy to apply encryption
Cons
• Unknown

34. • Seamless MVC framework across server
and client
• Address the most common difficulty in
design active server : the synchronization
• Base framework environment for adapting
any gameplay