Reactive microservices with eclipse vert.x
- 1. MONOLITHS TO MICROSERVICES: APP TRANSFORMATION Hands-on Technical Workshop Ram Maddali Senior Architect @RamMaddali rmaddali@redhat.com Anand Akella Senior Architect aakella@redhat.com
- 3. INSERT DESIGNATOR, IF NEEDED The 2 faces of Reactive Reactive A software showing responses to stimuli Reactive Systems Reactive Programming Akka, Vert.x Reactor, RX, Vert.x Actor, Agent Autonomic Systems Data flow, Functional programming
- 4. INSERT DESIGNATOR, IF NEEDED Execution Model (single core) Blocking ● Example: CGI, early versions of server side JavaScript. ● Can only scale horizontally Multi thread ● Example: Java EE, Tomcat, Spring (non reactive) ● Scales horizontally and vertically Non blocking ● Example: NodeJS, Eclipse Vert.x, Akka, Spring reactive ● Scales horizontally and vertically Single Thread Blocking Single Thread Non-blocking Multi thread = Execution Thread = Request 1 = Request 2 = Request 3 Time Reactive Systems Request 1 waiting for DB Multi Thread Non-blocking
- 5. INSERT DESIGNATOR, IF NEEDED5 Eclipse Vert.x Vert.x is a toolkit to build distributed and reactive systems ● Asynchronous Non-Blocking development model ● Simplified concurrency (event loop) ● Reactive microservice, Web applications, IOT ● Ideal high-volume, low-latency applications ● Un-opinionated ● Understands clustering in its core architecture Home - http://www.vertx.io
- 6. INSERT DESIGNATOR, IF NEEDED6 VERT.X EVENT LOOP EVENT QUEUE EVENT LOOP WORKER THREADS async Handle Thousands of Requests With Few Threads response
- 7. INSERT DESIGNATOR, IF NEEDED7 Vert.x Ecosystem
- 8. INSERT DESIGNATOR, IF NEEDED8 ● Explore Vert.x Maven project ● Create an API gateway ● Run Vert.x locally ● Deploy Vert.x on OpenShift LAB 4: Reactive Microservices with Eclipse Vert.x
- 9. LAB: REACTIVE MICROSERVICES WITH ECLIPSE VERT.X
- 10. GOAL FOR LAB In this lab you will learn: ● How Event-based architectures supercharge microservice apps ● Use cases for reactive applications ● Develop microservices using Eclipse Vert.x ● Interact with other microservices without blocking ● Learn the basics of Reactive programming
- 11. CURRENT STATE OpenShift coolstore-prod Coolstore monolith Coolstore database (prod) inventory Inventory microservice Inventory database UI Future Services Future Services Future Services Future Services catalog Catalog microservice Catalog database
- 12. LAB: REACTIVE MICROSERVICES SCENARIO 6 BUILDING REACTIVE MICROSERVICES
- 14. RESULT OF LAB In this lab you learned how to: ● Build reactive web application that are non-blocking ● Asynchronously call out to external service using Callbacks, Handlers and Futures ● Deploy the application to OpenShift
- 16. ECLIPSE VERT.X OFFER MUCH MORE
- 17. INSERT DESIGNATOR, IF NEEDED17 SERVICE DISCOVERY Service Provider Service Provider Service Provider Service Consumer Service Consumer Service Consumer Vert.x Service Registry publish lookup Bridge Bridge Bridge import Kubernetes Consul Other
- 18. INSERT DESIGNATOR, IF NEEDED Vert.x vs NodeJS 2 threads per core NodeJS Vert.x Vert.x ● Multi-threaded ● Polyglot (Java, JavaScript, Scala, and more) ● Supports reactive programming using RxJava, RxJS, etc NodeJS ● Single threaded ● JavaScript only ● Support reactive programming using RxJS
- 19. INSERT DESIGNATOR, IF NEEDED19 FREE E-BOOKS http://vertx.io/docs/