mrniko/netty-socketio

Health v2 · maintenance only

Adoption not part of the score

7019 stars · 1668 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

A Java implementation of the Socket.IO server built on the Netty framework, supporting Socket.IO client versions 1.x through 4.x. It provides realtime bidirectional communication with websocket and xhr-polling transports, namespaces, rooms, acks, SSL, and distributed broadcast across nodes.

Use cases

• add realtime websocket messaging to a Java server
• implement a Socket.IO server in Java
• broadcast events to connected clients across multiple nodes
• build a chat or multiplayer game backend in Java
• support long-polling fallback for realtime clients
• scale Socket.IO sessions with Redis or Hazelcast stores

When to choose

• you need Socket.IO server compatibility in a JVM application
• you want high-throughput realtime messaging with Netty performance
• you need distributed broadcast across multiple server nodes
• you want annotation-based declarative event handlers in Java

When to avoid

• you only need plain websockets without Socket.IO semantics
• your stack is Node.js where the official Socket.IO server exists
• you need Socket.IO client features newer than v4

Facets

library · maturity stable

websocket http-server middleware web-development backend jvm cross-platform socketio netty realtime xhr-polling rooms namespaces distributed-broadcast real-time messaging

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