TCP Chat Server: Real-Time Messaging in Go
Overview
A real-time, multi-room TCP chat server built in Golang, designed around Go’s concurrency primitives to handle multiple simultaneous clients and chat rooms without race conditions.
Key Technical Details
- Centralized, channel-driven command processor to handle concurrent client commands, preventing race conditions and simplifying concurrency management across goroutines
- Per-client goroutines with line-delimited TCP parsing for scalable, real-time messaging across multiple concurrent chat rooms
- Map-backed room registries with broadcast logic for
O(1)member lookups, enabling efficient fan-out delivery - Clean architecture with modular design for maintainability and easy extension
Architecture Highlights
Client A ──┐ ┌── Room "general"
Client B ──┤── Command Channel ─┤── Room "random"
Client C ──┘ └── Room "dev"
Each client runs in its own goroutine, sending parsed commands through a central channel. The command processor routes messages to the appropriate room, which handles fan-out delivery to all members.