Monolith to Reactive Microservices

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MONOLITH TO REACTIVE MICROSERVICES

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s.id/jvm3slide2

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MONOLITH TO REACTIVE MICROSERVICES EKO KURNIAWAN KHANNEDY ▸ Principal Software Development Engineer at Blibli.com ▸ Part of Research and Development Team at Blibli.com ▸ Code Java almost 10 years, but sometimes code Scala and Go-Lang.

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THIS MATERIAL IS BASED ON OUR EXPERIENCE AT BLIBLI.COM

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MONOLITH TO REACTIVE MICROSERVICES AGENDA ▸ Blibli.com ▸ Before : Monolith ▸ After : Microservices ▸ Future : Reactive

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BLIBLI.COM MONOLITH TO REACTIVE MICROSERVICES

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MONOLITH TO REACTIVE MICROSERVICES BLIBLI.COM ▸ The ﬁrst online mall in Indonesia (since 2011). ▸ A subsidiary of Djarum Group. ▸ More than 500 employees. ▸ https://www.youtube.com/watch?v=ymvL5n2MxSc #DSTOUR16

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MONOLITH TO REACTIVE MICROSERVICES BLIBLI.COM TECH ▸ More than 150 engineers. ▸ More than 80 microservices. ▸ More than 400 nodes in production. ▸ Almost all microservices build using JVM ▸ Spring is our favorite framework (90% microservices).

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MONOLITH TO REACTIVE MICROSERVICES THIS PAGE NOT SERVED BY SINGLE APP

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MONOLITH TO REACTIVE MICROSERVICES THIS PAGE NOT SERVED BY SINGLE APP CART  SERVICE

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MONOLITH TO REACTIVE MICROSERVICES THIS PAGE NOT SERVED BY SINGLE APP AUTH  SERVICE CART  SERVICE

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MONOLITH TO REACTIVE MICROSERVICES THIS PAGE NOT SERVED BY SINGLE APP SEARCH  SERVICE AUTH  SERVICE CART  SERVICE

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MONOLITH TO REACTIVE MICROSERVICES THIS PAGE NOT SERVED BY SINGLE APP SEARCH  SERVICE AUTH  SERVICE PROMO  SERVICE CART  SERVICE

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MONOLITH TO REACTIVE MICROSERVICES THIS PAGE NOT SERVED BY SINGLE APP SEARCH  SERVICE AUTH  SERVICE PROMO  SERVICE CATEGORY  SERVICE CART  SERVICE

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MONOLITH TO REACTIVE MICROSERVICES THIS PAGE NOT SERVED BY SINGLE APP SEARCH  SERVICE AUTH  SERVICE PROMO  SERVICE CATEGORY  SERVICE PULSA  SERVICE CART  SERVICE

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MONOLITH TO REACTIVE MICROSERVICES THIS PAGE NOT SERVED BY SINGLE APP SEARCH  SERVICE AUTH  SERVICE PROMO  SERVICE CATEGORY  SERVICE PULSA  SERVICE TRAVEL  SERVICE CART  SERVICE

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MONOLITH TO REACTIVE MICROSERVICES JVM MEETUP #2 - MICROSERVICES (SPEAKER : ENDY MUHARDIN) https://www.youtube.com/watch?v=-pgvQScDohw

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BEFORE MONOLITH TO REACTIVE MICROSERVICES

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MONOLITH

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MONOLITH TO REACTIVE MICROSERVICES BLIBLI.COM HISTORY MONOLITH 2011

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MONOLITH TO REACTIVE MICROSERVICES MONOLITH PROBLEM ▸ The large monolithic code base intimidates developers. ▸ Overloaded IDE. ▸ Overloaded web container. ▸ Scaling the application can be difﬁcult. ▸ Requires a long-term commitment to a technology stack.

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AFTER MONOLITH TO REACTIVE MICROSERVICES

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MICROSERVICES

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MONOLITH TO REACTIVE MICROSERVICES BLIBLI.COM HISTORY MICROSERVICES 2016

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MONOLITH TO REACTIVE MICROSERVICES MICROSERVICES LOAD BALANCER INTERNET FRONTEND SERVER FRONTEND SERVER FRONTEND SERVER BACKEND SERVER BACKEND SERVER BACKEND SERVER BACKEND SERVER BACKEND SERVER THIRD PARTY DATABASE DATABASE

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MICROSERVICES IS JUST A DISTRIBUTED MONOLITH

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MICROSERVICES IS JUST A DISTRIBUTED MONOLITH IF NOT REACTIVE

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MONOLITH TO REACTIVE MICROSERVICES MICROSERVICES PROBLEM ▸ Response time increase because too many communication with other systems. ▸ Network failures is your best friend ▸ Microservices mean you will have farms, not pets. ▸ Don’t trust other services

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FUTURE MONOLITH TO REACTIVE MICROSERVICES

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GO REACTIVE

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MONOLITH TO REACTIVE MICROSERVICES BLIBLI.COM TODAY MICROSERVICES 2017 REACTIVE

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MONOLITH TO REACTIVE MICROSERVICES REACTIVE SYSTEM

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MONOLITH TO REACTIVE MICROSERVICES REACTIVE ON BLIBLI ▸ Asynchronous ▸ Non-blocking ▸ Location transparency ▸ Fault Tolerance ▸ Back-pressure ▸ Message-Driven

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MONOLITH TO REACTIVE MICROSERVICES ASYNCHRONOUS

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MONOLITH TO REACTIVE MICROSERVICES MICROSERVICES

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MONOLITH TO REACTIVE MICROSERVICES MICROSERVICES MICROSERVICES

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MONOLITH TO REACTIVE MICROSERVICES MICROSERVICES MICROSERVICES EDGE SERVICE /   API GATEWAY

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MONOLITH TO REACTIVE MICROSERVICES START FROM EDGE SERVICE / API GATEWAY

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MONOLITH TO REACTIVE MICROSERVICES EDGE SERVICE EDGE  SERVICE / API  GATEWAY ANDROID ORDER  SERVICE MEMBER  SERVICE AUTH  SERVICE CART  SERVICE WISHLIST  SERVICE … WEB RISK  SERVICE LOGISTIC  SERVICE PAYMENT  SERVICE

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MONOLITH TO REACTIVE MICROSERVICES CLIENT NETWORK LATENCY EDGE  SERVICE / API  GATEWAY

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MONOLITH TO REACTIVE MICROSERVICES SERVER NETWORK LATENCY EDGE  SERVICE / API  GATEWAY

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MONOLITH TO REACTIVE MICROSERVICES RXJAVA Single member = memberClient.findById(userId) Single order = orderClient.findByOrderId(orderId) Single payment = paymentClient.findByOrderId(orderId) return Single.zip(member, order, response, (a, b, c) -> { return Response.of(a,b,c) })

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MONOLITH TO REACTIVE MICROSERVICES NON-BLOCKING

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MONOLITH TO REACTIVE MICROSERVICES TOMCAT THREADPOOL ▸ minThread (default is 25) ▸ maxThread (default is 200) ▸ maxQueueSize (default is Integer.MAX_VALUE)

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MONOLITH TO REACTIVE MICROSERVICES NON BLOCKING JVM ▸ Use Netty ▸ Use Servlet 3 Async Support

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MONOLITH TO REACTIVE MICROSERVICES SPRING MVC + RXJAVA @RequestMapping(“/action”) public Single action(@Valid Request request){ service.action(request).map(result -> { Response.from(result); }) }

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MONOLITH TO REACTIVE MICROSERVICES LOCATION TRANSPARENCY

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MONOLITH TO REACTIVE MICROSERVICES PETS VS FARMS

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MONOLITH TO REACTIVE MICROSERVICES SERVER SIDE LOAD BALANCER AUTH SERVICE AUTH SERVICE MEMBER SERVICE MEMBER SERVICE ORDER SERVICE ORDER SERVICE LOAD  BALANCER LOAD  BALANCER LOAD  BALANCER EDGE SERVICE

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MONOLITH TO REACTIVE MICROSERVICES CLIENT SIDE LOAD BALANCER

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MONOLITH TO REACTIVE MICROSERVICES CLIENT SIDE LOAD BALANCER AUTH SERVICE AUTH SERVICE MEMBER SERVICE MEMBER SERVICE ORDER SERVICE ORDER SERVICE SERVICE  REGISTRY EDGE SERVICE EDGE SERVICE CART SERVICE CART SERVICE

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MONOLITH TO REACTIVE MICROSERVICES SPRING CLOUD + FEIGN + CONSUL @FeignClient(name=“authFeign”, serviceId=“authService”) public class AuthFeign{ @RequestMapping(value = “/users/_login”, method=RequestMethod.POST) Single login(@RequestBody LoginRequest request); }

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MONOLITH TO REACTIVE MICROSERVICES FAULT TOLERANCE

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MONOLITH TO REACTIVE MICROSERVICES FAILURE IS YOUR BEST FRIEND ▸ Network Timeout ▸ Http Internal Server Error ▸ Exception

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MONOLITH TO REACTIVE MICROSERVICES USER DETAIL UI

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MONOLITH TO REACTIVE MICROSERVICES USER DETAILS API RESPONSE { “email” : “[email protected]”, “firstName” : “Eko Kurniawan”, “lastName” : “Khannedy”, “wishlistCount” : 100, “carts” : […], “…” }

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MONOLITH TO REACTIVE MICROSERVICES USER DETAILS BACKEND Single member = memberFeign.findById(userId) Single count = wishlistFeign.count(userId) Single> carts = cartFeign.getCurrentCarts(userId) return Single.zip(member, count, carts, (a, b, c) -> { return Response.of(a,b,c) })

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MONOLITH TO REACTIVE MICROSERVICES WISHLIST FEIGN @FeignClient(name=“wishlistFeign”, serviceId=“wishlistService”, fallback=WishlistFeignFallback.class) public class WishlistFeign{ @RequestMapping(value = “/items/_count”, method=RequestMethod.GET) Single count(@RequestParam String userId); }

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MONOLITH TO REACTIVE MICROSERVICES WISHLIST FEIGN FALLBACK (POWERED BY HYSTRIX) public class WishlistFeignFallback implements WishlistFeign{ public Single count(String userId){ return Single.just(0); } }

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MONOLITH TO REACTIVE MICROSERVICES BACK-PRESSURE

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MONOLITH TO REACTIVE MICROSERVICES BACK-PRESSURE DILEMA CLIENT SERVER 10 ops / sec 1 ops / sec

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MONOLITH TO REACTIVE MICROSERVICES BACK-PRESSURE DILEMA CLIENT SERVER 1 ops / sec 10 ops / sec

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MONOLITH TO REACTIVE MICROSERVICES BACK-PRESSURE DILEMA CLIENT SERVER 1 ops / sec 10 ops / sec MAILBOX / QUEUE

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MONOLITH TO REACTIVE MICROSERVICES HYSTRIX THREADPOOL CONFIGURATION hystrix.threadpool.default.coreSize = 10 hystrix.threadpool.default.maximumSize = 20 hystrix.threadpool.default.maxQueueSize = 100

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MONOLITH TO REACTIVE MICROSERVICES BACK-PRESSURE WITH FEIGN + HYSTRIX CLIENT SERVER 1 ops / sec 10 ops / sec MAILBOX / QUEUE SIZE = 100 FALLBACK

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MONOLITH TO REACTIVE MICROSERVICES PROMO FEIGN FALLBACK (POWERED BY HYSTRIX) public class PromoFeignFallback implements PromoFeign{ public Single redeem(@RequestParam String voucher){ return Single.just(Boolean.FALSE); } }

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MONOLITH TO REACTIVE MICROSERVICES MESSAGE-DRIVEN

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MONOLITH TO REACTIVE MICROSERVICES TRADITIONAL SYSTEM ORDER  SERVICE RISK  SERVICE LOGISTIC  SERVICE PAYMENT  SERVICE EDGE  SERVICE CART  SERVICE

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MONOLITH TO REACTIVE MICROSERVICES TRADITIONAL SYSTEM ORDER  SERVICE RISK  SERVICE LOGISTIC  SERVICE PAYMENT  SERVICE EDGE  SERVICE CART  SERVICE PURCHASE  ORDER

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MONOLITH TO REACTIVE MICROSERVICES TRADITIONAL SYSTEM ORDER  SERVICE RISK  SERVICE LOGISTIC  SERVICE PAYMENT  SERVICE EDGE  SERVICE CART  SERVICE PURCHASE  ORDER MOVE  CART

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MONOLITH TO REACTIVE MICROSERVICES TRADITIONAL SYSTEM ORDER  SERVICE RISK  SERVICE LOGISTIC  SERVICE PAYMENT  SERVICE EDGE  SERVICE CART  SERVICE PURCHASE  ORDER MOVE  CART INSERT  ORDER

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MONOLITH TO REACTIVE MICROSERVICES MOVE LONG RUNNING TASK TO MESSAGE DRIVEN

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MONOLITH TO REACTIVE MICROSERVICES MESSAGE-DRIVEN SYSTEM ORDER  SERVICE RISK  SERVICE LOGISTIC  SERVICE PAYMENT  SERVICE EDGE  SERVICE CART  SERVICE PURCHASE  ORDER INSERT  ORDER MESSAGE BROKER RABBIT MQ / KAFKA STOCK  SERVICE

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MONOLITH TO REACTIVE MICROSERVICES IN BLIBLI.COM ORDER  SERVICE RISK  SERVICE EDGE  SERVICE RABBIT MQ STOCK  SERVICE KAFKA ANALYTIC  SERVICE RECOMMENDATION  SERVICE TRANSACTIONAL USER ACTIVITY

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MONOLITH TO REACTIVE MICROSERVICES ONE MORE THING

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MONOLITH TO REACTIVE MICROSERVICES TIMEOUT

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MONOLITH TO REACTIVE MICROSERVICES RIBBON & HYSTRIX TIMEOUT CONFIGURATION hystrix.command.default.execution.timeout.enabled=true hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=5000 authService.ribbon.ConnectTimeout=2000 authService.ribbon.ReadTimeout=2000

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THANKS

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MONOLITH TO REACTIVE MICROSERVICES REFERENCES ▸ https://medium.com/netflix-techblog/embracing-the-differences-inside-the-netflix-api-redesign-15fd8b3dc49d ▸ https://medium.com/netflix-techblog/announcing-zuul-edge-service-in-the-cloud-ab3af5be08ee ▸ http://www.reactivemanifesto.org/ ▸ http://microservices.io/ ▸ https://www.nginx.com/blog/service-discovery-in-a-microservices-architecture/ ▸ http://cloud.spring.io/spring-cloud-netflix/spring-cloud-netflix.html ▸ https://www.slideshare.net/jboner/without-resilience-nothing-else-matters-56053062 ▸ https://www.slideshare.net/jboner/go-reactive-42084559 ▸ https://articles.microservices.com/monolithic-vs-microservices-architecture-5c4848858f59