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Atmosphere Framework 4.0

The Atmosphere Framework makes it easy to build real-time web applications using WebSocket and Server-Sent Events (SSE). It runs on JDK 21+ and integrates with Spring Boot 4.0, Quarkus 3.21+, and Embedded Jetty 12.

Getting Started

• Getting Started with Spring Boot 4.0
• Getting Started with Quarkus
• Getting Started with Embedded Jetty
• Getting Started with atmosphere.js 5.0

Core Concepts

• Understanding AtmosphereHandler
• Understanding AtmosphereResource
• Understanding Broadcaster
• Understanding BroadcasterCache
• Understanding BroadcastFilter
• Understanding AtmosphereInterceptor
• Understanding the Atmosphere Protocol

Configuration

• Configuring AtmosphereFramework
• Configuring for Performance
• Enabling CORS

Client Library — atmosphere.js 5.0

• atmosphere.js API Reference
• Transport Negotiation

Samples

• Chat — Spring Boot
• Chat — Quarkus
• Chat — Embedded Jetty
• Chat — Embedded Jetty WebSocket

Migration

• Migrating from Atmosphere 2.x to 4.0

Legacy Documentation

Looking for Atmosphere 2.x documentation? See the Legacy Documentation page.