Reactive programming on the JVM fast and productive

Transcript

1. REACTIVE PROGRAMMING ON THE JVM FAST AND PRODUCTIVE / Paulo Lopes @jetdrone
2. REACTIVE WHAT'S THAT? Responsive Resilient Message Driven Elastic
4. TOOLKIT <dependency> <groupid>io.vertx</groupid> <artifactid>core</artifactid> <version>3.3.3</version> </dependency>
5. UNOPINIONATED import io.vertx.core.AbstractVerticle; public class Server extends AbstractVerticle { public void start() { vertx.createHttpServer().requestHandler(req -> { req.response() .putHeader("content-type", "text/plain") .end("Hello from Vert.x!"); }).listen(8080); } }
6. REACTIVE conn.query("SELECT * from EMP", res -> { if (res.succeeded()) { // Get the result set ResultSet resultSet = res.result(); } else { // Failed! } });
7. POLYGLOT $vertx.create_http_server().request_handler() { |req| req.response() .put_header("content-type", "text/plain") .end("Hello from Vert.x!") }.listen(8080)
8. DISTRIBUTED EventBus eb = vertx.eventBus(); eb.consumer("news.uk.sport", message -> { println("I have received a message: " + message.body()); });
9. ENTERPRISE SCALE ISN'T WEB SCALE!
11. HOW DOES VERT.X SCALE?
20. EVOLUTIONARY MIGRATION
24. TO THE POINT DISCOVERY
25. UNLIMITED HORIZONTAL SCALING
27. UNLIMITED HORIZONTAL SCALING
29. LIGHTWEIGHT
30. TIME FOR ACTION
31. C10K SERVER app .route("/eventbus/*") .handler(SockJSHandler.create(vertx).bridge(options)); vertx .createHttpServer() .requestHandler(app::accept) .listen(8080, res -> { // publish a new message every 10 sec vertx.setPeriodic(10000L, t -> { vertx.eventBus().publish("time", new JsonObject() .put("unixtime", System.currentTimeMillis())); }); System.out.println("Server ready!"); });
32. C10K CLIENT for (int i = 0; i < sockets.length; i++) { vertx .createHttpClient() .websocket(8080, "localhost", "/eventbus/websocket", ws -> { ws.frameHandler(frame -> println(frame.binaryData())); // subscribe to the "time" address ws.writeFrame(WebSocketFrame.textFrame(SUBSCRIBE, true)); }); }
34. REALTIME APPLICATIONS https://github.com/pmlopes/vert-x3-experiments/tree/realtime-canvas
35. LOW LATENCY HTTP2 https://github.com/vert-x3/vertx-examples/tree/master/web- examples/src/main/java/io/vertx/example/web/http2
36. BUT WE WANT REAL WORLD APPS! frontend backend devops
41. FINAL PRODUCT
43. NOT CONVINCED YET?
44. VERT.X 3 FOR YOUR NEXT CURRENT PROJECT!
47. THANK YOU! Vert.x is fun! http://vertx.io http://jetdrone.xyz/vertx-starter