System Overview - Player turn management
This system manages the order of players' turns in a multiplayer game. It ensures each player gets their turn in the correct sequence and handles turn timeouts or skips.
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Player turn management in LLD - Architecture Diagram
Architecture Diagram
User 1 User 2 User 3
| | |
v v v
+-------------------------+
| Turn Manager |
| (Turn Controller) |
+-------------------------+
|
v
+-------------------------+
| Game State Store |
+-------------------------+Components
User 1, User 2, User 3
client
Players who send actions and receive turn notifications
Turn Manager
service
Controls the sequence of player turns and enforces turn rules
Game State Store
database
Stores current game state including whose turn it is and player statuses
Request Flow - 5 Hops
User 1 → Turn Manager
Turn Manager → Game State Store
Turn Manager → Game State Store
Turn Manager → User 2
User 2 → Turn Manager
Failure Scenario
Component Fails:Turn Manager
Impact:Turn sequencing stops; players do not get notified of their turns, game stalls
Mitigation:Use redundant Turn Manager instances with leader election to ensure availability
Architecture Quiz - 3 Questions
Test your understanding
Which component decides which player’s turn is next?
Design Principle
This design separates turn control logic from game state storage, allowing clear responsibility and easier scaling. The Turn Manager acts as the central coordinator ensuring orderly player turns, while the Game State Store keeps persistent game data.