Presentation in OGDC 2012 organized by VNG Corp.

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. Internet
Database
Client
Game Servers

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

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

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

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

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

17. Object
Views
Game
Objects Object Modules
Rooms

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

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

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

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

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

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

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

28. Position
SetProperty(Position, (1, 2)) Object Energy
Gold
Change Set
SYNCHRONIZATION Sync
SCHEDULER 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 Synchronize Buy Item
Chat RequestFriend
- Username - Type - ItemType
- Message - FriendGuid
- Password - Properties - Quantity
Encryption
Network package
Serializer
(Thrift, Protobuf, Json, XML)

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

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