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Vert.x introduction
- 1. Asynchronous IO with Vert.x Peter Ledbrook - SpringSource
- 2. New kid on the block Javascript Non-blocking Single-threaded Reactor pattern 2
- 3. What’s it about? • C10K Problem – How do you handle 10,000+ concurrent connections? – Without grinding to a halt? • Why? – All those mobile devices! – Rise of long-lived connections Real-time chat Instant messaging Twitter Voice and video 3
- 4. Transloadit • “Flexible, fast and scalable file uploading and encoding” • Video/audio encoding on the fly – 500mb/s Transloadit Video Client S3/Cloudfiles/... 4
- 5. Voxer • Walkie-talkie for iOS and Android • Live audio • Large number of connections • Push notifications 5
- 6. Javascript and nothing but Javascript 6
- 7. What if? • Language neutral framework • On the JVM • Polyglot APIs • Easy horizontal scalability • Do non-eventy stuff in a non-eventy way Vert.x! 7
- 8. Vert.x • Written in Java • Built on Netty and NIO 2 – Java 7 only! • Multiple language bindings – JRuby – Groovy – Javascript – Python/Clojure/Scala planned • Based on the Reactor pattern 8
- 9. How it works Event loop App registers Events trigger handlers handlers • Handlers executed synchronously – on a single thread • Use handlers to pass messages • Inter/intra application comms – EventBus with messages – Safe shared data structures 9
- 10. Features • Non-blocking stdio • TCP/IP and HTTP servers and clients • Web Socket support • (Non-blocking) Redis & Mongo modules (busmods) • Asynchronous file system access and stream handling Pump ReadStream WriteStream e.g. HTTP Request AsyncFile 10
- 11. Example - Echo socket 11
- 12. Example - Echo client 12
- 13. Scaling App instance 13
- 14. Scaling Vertx node Event bus App App App instance instance instance vertx run -instances 3 14
- 15. Scaling Hazelcast Event bus Vertx Vertx Vertx node node node 15
- 16. Extensibility via (Bus) Mods Work Web ... Mailer MongoDB queue server Event bus 16
- 17. Mod structure • Core mods in $VERTX_HOME/mods • User mods in $VERTX_MODS 17
- 18. A more complex example
- 19. Realtime logging app Log messages App SockJS Browser 19
- 20. Realtime logging app 20
- 21. Realtime logging app 21
- 22. Realtime logging app 22
- 23. Demo
- 24. Summary • Event-driven framework for the JVM – Low overhead – Handle large number of connections – Great for working with streams • Pick your own language! – Which will of course be Groovy ;) • Published release: 1.0.1 – Still early days – Get involved now! 24
- 25. More info • w: https://github.com/purplefox/vert.x http://purplefox.github.com/vert.x/ • f: http://groups.google.com/group/vertx • t: pledbrook • b: http://blog.springsource.com/author/peter-ledbrook/ 25
- 26. Thank you! Questions? 26