High-Performance NIO Network Layer

ItdaStream implements a custom multi-reactor NIO network layer inspired by Apache Kafka's architecture, optimized for high-throughput, low-latency message processing.

• Multi-reactor pattern: Acceptor (connection distribution) → Processor threads (NIO I/O) → Handler threads (business logic)
• Response ordering: TreeMap-based sequence buffering ensures strict FIFO ordering despite concurrent handlers
• Connection management: TCP_NODELAY, KEEP_ALIVE, configurable max connections and backpressure via request queue