服务器编程

A thread-per-connection blocking server, its simplicity, and the need for bounded resources and modern virtual-thread context.

A selector/event-loop server architecture and the separation of I/O readiness from application work.

Choosing text/binary serialization by schema evolution, compatibility, size, CPU, tooling, and security.

Heartbeat design for detecting stale connections and distinguishing liveness from end-to-end health.

Length-prefix, delimiter, and fixed-size framing for converting a TCP byte stream into application messages.