Friday, March 9, 12

WebSockets with AtmosphereDan Vulpe@dvulpe

10 mar 2012

Friday, March 9, 12

HTTP - Half Duplex

Client Server

Request

Friday, March 9, 12

HTTP - Half Duplex

Client Server

Request

Response

Request

ResponseConnection 2

30-150ms

Friday, March 9, 12

HTTP - Half Duplex

Client Server

Request

Response

Request

ResponseConnection 2

30-150ms

HttpSession

Friday, March 9, 12

WebSocket Full Duplex

Client Server

Single TCP connection

Friday, March 9, 12

WebSocket Full Duplex

Client Server

Handshake Request

WebSocket upgrade

Single TCP connection

Friday, March 9, 12

Atmosphere

• Java Framework provides uniform Comet API

• Supports: WebLogic, Tomcat, Jetty, Glassfish, JBoss, Grizzly, Servlet 3.0 Async

• Fallback to blocking-IO (one thread per channel)

• jQuery plugin

• WebSocket façade

Friday, March 9, 12

Components

Http RequestMeteorServlet

AtmosphereResource Broadcaster

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Server: Incoming

• Implement SubProtocol

• handle onMessage events

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Server: Outgoing

• Request a Broadcaster from Factory

• Subscribe resources to Broadcaster

• Publish messages through Broadcaster

Friday, March 9, 12

JS Client API

Friday, March 9, 12

DEMO

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Java Support

• Server side

• JSR356 - Java API for WebSocket - In Progress

• Containers: Jetty(7, 8), Grizzly/Glassfish, Resin

• Client

• async-http-client

Friday, March 9, 12

Resources

• https://github.com/Atmosphere/atmosphere

• http://www.websocket.org/

• http://www.w3.org/TR/websockets/

• http://wiki.eclipse.org/Jetty/Feature/WebSockets

Friday, March 9, 12

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Friday, March 9, 12