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CodeCamp Iasi 10 march 2012 - websockets-with-atmosphere
Atmosphere is a Java framework that provides a unified Comet API and supports WebSockets and fallback to blocking IO. It uses broadcasters to publish messages from the server to subscribed clients over a single TCP connection, providing full-duplex communication. The document demonstrates how Atmosphere works on the server and client sides and discusses Java support for WebSockets.
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CodeCamp Iasi 10 march 2012 - websockets-with-atmosphere
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- 2. WebSockets with Atmosphere Dan Vulpe @dvulpe 10 mar 2012 Friday, March 9, 12
- 3. HTTP - HalfDuplex Request Client Server Friday, March 9, 12
- 4. HTTP - HalfDuplex Request 30-150ms Response Request Connection 2 Response Client Server Friday, March 9, 12
- 5. HTTP - HalfDuplex Request 30-150ms Response HttpSession Request Connection 2 Response Client Server Friday, March 9, 12
- 6. WebSocket Full Duplex Single TCP connection Client Server Friday, March 9, 12
- 7. WebSocket Full Duplex Handshake Request WebSocket upgrade Single TCP connection Client Server Friday, March 9, 12
- 8. 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
- 9. Components MeteorServlet Http Request AtmosphereResource Broadcaster Friday, March 9, 12
- 10. Server: Incoming • Implement SubProtocol • handle onMessage events Friday, March 9, 12
- 11. Server: Outgoing • Request a Broadcaster from Factory • Subscribe resources to Broadcaster • Publish messages through Broadcaster Friday, March 9, 12
- 12. JS Client API Friday,March 9, 12
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- 14. 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
- 15. 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
- 16. Thank you! Please fill out the evaluation form! Friday, March 9, 12