Welcome to Async-IO!

Home of the most popular Real Time, Asynchronous and Non-Blocking Framework for the JVM

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Why Async-IO.org?

Async-IO.org is the company behind the Atmosphere Framework! The Atmosphere Framework is the most popular asynchronous application development framework for enterprise Java. The Atmosphere Framework provides the enterprise features required to build massive scalable and real time asynchronous applications using transports like WebSocket, Server Sent Events and traditional Ajax Techniques.

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We offer support for Atmosphere, NettoSphere and AsyncHttpClient/wAsync

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Write Once, Deploy Anywhere

The Atmosphere Framework mission is to make real time apps possible in every browser, library and mobile device, blurring the differences between the different transport mechanisms. The framework is written in Java and Javascript and support the majority of existing Java/Web Frameworks. Applications written using the Atmosphere Framework can be deployed in all populars Java/Java EE Web Server like WebLogic, Tomcat, Jetty, GlassFish, Vert.x, Netty Framework and many more.

Getting Started!


import org.atmosphere.config.service.ManagedService;
import org.atmosphere.cpr.AtmosphereResponse;
import org.atmosphere.handler.OnMessage;

@ManagedService(path = "/echo")
public class Echo {
    public void onMessage(AtmosphereResponse res, String m) {
        res.write("Echo: " + m);


$(function () {
   var request = {
     url: document.location.toString() + 'echo',
     transport : "websocket" ,
     fallbackTransport: 'long-polling'};

   request.onMessage = function (response) {

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