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LLDsystem_design~12 mins

Requirements and game rules in LLD - Architecture Diagram

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System Overview - Requirements and game rules

This system manages the requirements and rules of a game. It ensures players understand the game objectives, allowed actions, and constraints. The system validates player moves and enforces rules to maintain fair play.

Architecture Diagram
User
  |
  v
Load Balancer
  |
  v
API Gateway
  |
  v
Cache
  |
  v
Game Rules Service <--> Rules Database
  |
  v
Response to User
Components
User
client
Player interacting with the game system
Load Balancer
load_balancer
Distributes incoming requests evenly to API Gateway instances
API Gateway
api_gateway
Entry point for client requests, routes to game rules service
Game Rules Service
service
Processes game requirements and rules, validates player actions
Rules Database
database
Stores game rules, requirements, and configurations
Cache
cache
Stores frequently accessed rules to reduce database load and improve response time
Response to User
response
Sends validation results and game rule information back to the player
Request Flow - 11 Hops
User → Load Balancer
Load Balancer → API Gateway
API Gateway → Cache
Cache → API Gateway
API Gateway → Game Rules Service
Game Rules Service → Rules Database
Rules Database → Game Rules Service
Game Rules Service → Cache
Game Rules Service → API Gateway
API Gateway → Load Balancer
Load Balancer → User
Failure Scenario
Component Fails:Rules Database
Impact:New or uncached rule queries fail, causing validation errors for uncached rules
Mitigation:Cache serves previously cached rules for reads; writes fail and trigger alerts for database recovery
Architecture Quiz - 3 Questions
Test your understanding
Which component first checks if the game rules are already available to speed up the request?
ARules Database
BLoad Balancer
CCache
DAPI Gateway
Design Principle
This architecture uses caching to reduce database load and improve response times for game rule validations. The API Gateway centralizes request routing, and the load balancer ensures even distribution of traffic. Failure handling relies on cache availability and alerts for database issues.