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Realtime Client Server Framework for the JVM, supporting WebSockets and Cross-Browser Fallbacks Support

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Fixes #1562

latest commit 9f92ca632c
Jeanfrancois Arcand jfarcand authored April 23, 2014
Octocat-spinner-32 assembly Bump version to 2.2.0-SNAPSHOT March 14, 2014
Octocat-spinner-32 license Clarify and clean up January 24, 2014
Octocat-spinner-32 modules Fixes #1562 April 23, 2014
Octocat-spinner-32 scripts Fix it November 22, 2013
Octocat-spinner-32 .gitignore Exclude September 17, 2013
Octocat-spinner-32 Update April 14, 2014
Octocat-spinner-32 pom.xml Bump March 29, 2014


Welcome to Atmosphere: The Asynchronous WebSocket/Comet Framework

The Atmosphere Framework contains client and server side components for building Asynchronous Web Applications. The majority of popular frameworks are either supporting Atmosphere or supported natively by the framework. The Atmosphere Framework supports all major Browsers and Servers.

Follow us on Twitter.

Atmosphere transparently supports WebSockets, Server Side Events (SSE), Long-Polling, HTTP Streaming (Forever frame) and JSONP.

The Atmosphere Framework Stack consists of:

Atmosphere Stack

The Atmosphere Framework Stack works on all Servlet based servers including Tomcat, JBoss Jetty, Resin, GlassFish, Undertow, WebSphere, WebLogic etc. Not running a Servlet Container? Netty, Play! Framework or Vert.x.

Atmosphere's Java/Scala Client is called wAsync.

Using another framework? Look at the list of supported extensions. Easiest way to learn Atmosphere is by trying a sample.

Commercial support now available!

Commercial Support is now available via Want the project to stay alive? Please donate by visiting the and click on the donate button!


Get started using this step by step tutorial.

Official Documentation

Our Wiki contains several tutorials for getting started as well as FAQ. You can also browse the framework's Javadoc for Server Components, and atmosphere.js for Client Components.

Quick Start

The Atmosphere's Framework ships with many examples describing how to implement WebSockets, Server Side Events, Long Polling, HTTP Streaming and JSONP client applications. Take a look at this page to pick the best sample to start with.

To use Atmosphere, add the following dependency:


Where atmosphere-module can be: jersey, runtime (main module), guice, redis, hazelcast, jms, jgroups or gwt. Our official releases are available from Maven Central download.

Jump directly inside the code: WebSockets, Server Side Events (SSE), Long-Polling, JSONP and HTTP Streaming!

Take a look at the PubSub Client-Server or the infamous Chat Client-Server to realize how simple Atmosphere is!


If you are interested, subscribe to our mailing list for more info! We also have IRC channel on under #atmosphere-comet.



2.1 release: 2.1.2 2.1.1 2.1.0

2.0 release: 2.0.8 2.0.7 2.0.6 2.0.5 2.0.4 2.0.3 2.0.2 2.0.1

1.0 release: 1.0.17 1.0.16 1.0.14 1.0.13 1.0.11 1.0.10 1.0.8 1.0.6 1.0.5 1.0.4 1.0.3 1.0.2 1.0.1 1.0


Build Status

Build Status alpha

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