Vert.x 3 - Voxxed Days Belgrade

It's the latest and more improved presentation of vert.x 3

Transcript

1. vert.x v3 high performance polyglot application toolkit
2. Zdravo! Bartek Zdanowski @bartekzdanowski 2
3. Hello! developer @ vertx lover father and husband :) 3
4. vert.x 4
5. vert.x 5 Invented by Tim Fox as Node.x 24 June 2015 - released v3 still it’s very hot :D
6. vert.x buzzwords simple embeddable toolkit threadSafe concurrent asynchronous eventDriven reactive eventBus scalable polyglot 6
7. vert.x buzzwords fun 7
8. the problem 8
9. the problem number of mobile users raises 2,1 bln in 2012 -> 7 bln in 2018 Internet of things - 30 bln in 2020! IPv4 is exhausted IPv6 is already ready for all of them 9
10. the problem traditional synchronous approach ▪ one thread handles one task ▪ thread is waiting for job to finish ▪ whole queue of tasks waits 10
11. the problem traditional synchronous approach ▪ synchronous code ▪ scalability problem ▪ lots of threads ▪ concurrency that no-one understands ;) 11
12. the problem 12 Tomcat: 200 threads = 200 connections rest of incoming connections must wait*… *okay, now you can do nonblocking in Tomcat https://tomcat.apache.org/tomcat-7.0-doc/aio.html
13. the problem 13 thread pools
14. the problem 14 thread pools
15. the problem big thread pools are evil synchronous code is even more evil concurrency is very hard synchronous == blocking 15
16. the solution 16
17. the solution 17 thread pools
18. the solution 18 1 task = series of loosely coupled events event that informs that new job/data is waiting
19. the solution 19 program should release thread instead of waiting for operation (I/O) to be finished use non-blocking IO (NIO)
20. the solution 20 asynchronous event driven
21. the solution 21
22. vert.x 22 dispatcher handlers thread pool reactor
23. vert.x 23 handlers thread pool thread-1 handler 1 handler 2
24. vert.x 24 thread pool == double cores count actor like model
25. some code 25
26. 26 public class HelloVerticle extends AbstractVerticle { @Override public void start() { LoggerFactory.getLogger(getClass()).info( "Hello vert.x"); } }
27. 27 public static final String CONSUMER_ADDRESS = "consumer.address"; public void start() { vertx.eventBus().consumer(CONSUMER_ADDRESS, new Handler<Message<String>>() { public void handle(Message<String> message) { logger.info("Got message:" + message.body()); } }); } //Java < 8
28. 28 public static final String CONSUMER_ADDRESS = "consumer.address"; public void start() { vertx.eventBus().consumer(CONSUMER_ADDRESS, message -> { logger.info("Got message: " + message.body()); }); } //Java 8 Lambdas FTW!
29. threadsafe code 29
30. threadsafe 30 class MyService { public synchronized Result doSomething(Data data) { //do some critical stuff } }
31. threadsafe only when one thread! 31 class MyService { public synchronized Result doSomething(Data data) { //do some critical stuff } }
32. threadsafe particular verticle runs in one thread! 32
33. 33 verticle
34. 34 basic deployment unit actor-like model (akka similarity) always run in the same thread classloader isolated can have many instances verticle
35. verticle threadsafe code ▪ verticle instance - always the same thread ▪ separated classloaders for each verticle instance 35
36. verticle threadsafe code ▪ event bus separates threads ▪ shared data: maps, counters, locks 36
37. 37 eventBus
38. 38 eventBus
39. 39 eventBus
40. 40 eventBus server 1 server 2 server 3
41. 41 eventBus server 1 webclient server 2 server 3
42. 42 eventBus Publisher - subscriber publish() //broadcast like JMS Topics, no replying
43. 43 eventBus p2p send() //point-to-point like JMS Queues, can reply
44. 44 eventBus p2p send() //point-to-point like JMS Queues, can reply round robin
45. 45 eventBus p2p send() //point-to-point like JMS Queues, can reply round robin
46. 46 public void start() { getLogger().info("Broadcaster started"); vertx.setPeriodic(PERIOD_MS, timerID -> { getLogger().info("Broadcasting message " + counter); vertx.eventBus().publish(Consumer.CONSUMER_ADDRESS, "Message " + counter); counter++; }); } Broadcasting a message
47. 47 public void start() { getLogger().info("Broadcaster started"); vertx.setPeriodic(PERIOD_MS, timerID -> { getLogger().info("Broadcasting message " + counter); vertx.eventBus().send(Consumer.CONSUMER_ADDRESS, "Message " + counter); counter++; }); } Sending a message p2p
48. 48 public void start() { getLogger().info("Consumer started! " + hashCode()); vertx.eventBus().consumer(CONSUMER_ADDRESS, message -> { getLogger().info("Received message: " + message.body()); }); } Consuming a message
49. public void start() { getLogger().info("Consumer started! " + hashCode()); vertx.eventBus().consumer(CONSUMER_ADDRESS, message -> { getLogger().info("Received message: " + message.body()); message.reply("I got your message"); }); } 49 Consuming a message + replying
50. 50 vert.x ecosystem
51. 51 lightweight vert.x core extensions ▪ web ▪ data access (mongoDB, redis, JDBC) ▪ security (basic auth, jdbc auth, jwt, shiro) ▪ reactive (based on RxJava) ▪ others vert.x ecosystem
52. 52 web server
53. 53 web server ▪ vert.x core - very raw and basic HTTP server ▪ web server ext - neat path and content routing
54. 54 vertx.createHttpServer().requestHandler( req -> { LOG.info(String.format("Got request [%s]", req.path())); switch (req.path()) { case "/" : req.response().end("Ok. Here's root"); break; case "/other": req.response().end("Other things..."); break; default: req.response().setStatusCode(404).end("Unknown resource!"); } }).listen(port) vert.x core - very raw and basic HTTP server
55. 55 Router router = new RouterImpl(vertx); router.get("/users/:uid").handler( ctx -> { String id = ctx.request().getParam("uid"); JsonObject user = new JsonObject().put("id", id).put("name", "bartek"); ctx.response().end(user.encode()); }); HttpServer server = vertx.createHttpServer(); server.requestHandler(router::accept).listen(8080); web server ext - neat path and content routing
56. 56 router.post("/some/post/path") router.put() router.get("/user/data").consumes("application/json") router.get("/user/data").consumes("text/html") router.get("/info").produces("text/html") router.get("/info").produces("text/plain") web server ext - content routing
57. 57 benchmarking
58. 58 benchmarking https://www.techempower.com/benchmarks/#section=data-r8&hw=i7&test=plaintext
59. 59 vert.x vs akka
60. verticles: ▪ are actor-like ▪ can be addressed ▪ can subscribe to many addresses ▪ can do processing jobs ▪ can send back content ▪ can have multiple instances of same class 60 vert.x vs akka
61. how vert.x scales 61
62. vertically ▪ verticle can have multiple instances ▪ each instance can have own processor core horizontally ▪ clustering - lot’s of nodes ▪ eventbus reaches all nodes 62 how vert.x scales
63. polyglot 63
64. ▪ java ▪ groovy ▪ javascript ▪ ruby ▪ ...more to come! 64 polyglot
65. 65 puts "Ruby for the win!" eb = $vertx.event_bus() # Send a message every second $vertx.set_periodic(1000) { |v| puts "RUBY: sending Ruby message" eb.publish("producer.address", "Ruby shines!") } Ruby shines
66. 66 var eb = vertx.eventBus(); eb.consumer("producer.address", function (message) { console.log("JAVASCRIPT: Received a message: " + message.body()); }); console.log("Receiver ready!"); For JavaScript dare devils!
67. usecases 67
68. ▪ effective use of servers’ resources ▪ parallel computing ▪ great as a backend for lots of (mobile) clients ▪ nice integration platform ▪ could be awesome in microservices 68 usecases
69. YOU getting started 69
70. http://vertx.io/ https://github.com/vert-x3 https://github.com/zdanek/vertx-pres 70 YOU getting started
71. grab a sticker! 71 YOU getting started
72. have fun! 72 YOU getting started
73. I’m not the owner of the pictures used. Just found them on: http://www.rantchic.com/wp-content/uploads/2013/12/Apollo-13.jpg http://www.gamesaktuell.de/screenshots/1280x1024/2009/04/terminator_2_blu_ray03.jpg http://tripoutlook.com/wp-content/uploads/2013/03/Car-parking.jpg http://upload.wikimedia.org/wikipedia/commons/5/52/Parallel_Parking_cars.jpg http://www.foreverbarcelona.com/wp-content/uploads/2014/02/Taxi-Tips.png http://www.125p.eu/wp-content/uploads/2009/03/fiat-125p-zmiennicy-5.jpg http://www.novosti.rs/upload/images/2011/07/2107/bg-taksi.jpg http://i.livescience.com/images/i/000/024/292/iFF/neurons-120208.jpg?1328727600 73 All the pics used
74. 74 Hvala!