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Vert.x introduction
Vert.x is an asynchronous and non-blocking event-driven framework that allows building reactive applications on the JVM. It uses the reactor pattern and handles a large number of concurrent connections through asynchronous I/O without blocking threads. Applications can be written in Java or other JVM languages and deployed as microservices that communicate asynchronously through an event bus. This allows for easy horizontal scalability.
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Vert.x introduction
- 1. Asynchronous IO withVert.x Peter Ledbrook - SpringSource
- 2. New kid onthe 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, fastand 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 nothingbut 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 inJava • 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 - Echosocket 11
- 12. Example - Echoclient 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 • Coremods in $VERTX_HOME/mods • User mods in $VERTX_MODS 17
- 18. A more complexexample
- 19. Realtime logging app Log messages App SockJS Browser 19
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- 24. Summary • Event-driven frameworkfor 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
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