1.
김민석
Senior Platform Architect
Pivotal Cloud Foundry
mkim@pivotal.io
1
Core Spring & Reactive

2.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
2
여기서 다루는 세션들
스프링 프로젝트를 이용한 프로그래밍
Reactive Spring (Tue/05)
Reactive Applications on Apache Tomcat and Servlet 3.1
Containers(Tue /05)
Spring Integration 5.0: What's New?(Tue/ 05)
Not Only Reactive - Data Access with Spring Data(Tue /05)
Reactive Data Access with Spring Data (Tue /05)
Under the Hood of Reactive Data Access (Tue/06)
Simplifying Apache Geode with Spring Sata(Wed/06)
JDBC, What is it Good For? (Thu/07)
Spring Security 5: The Reactive Parts(Tue /05)
Bootiful Development with Spring Boot and React (Wed/ 06)
Next Generation OAuth Support with Spring Security 5.0 (Wed/06)
Lessons Learned from Upgrading Thymeleaf (Wed /06)
Why Spring <3 Kotlin( Tue/07)
What's New in Spring AMQP 2.0( Wed/06)
JUnit 5 — New Opportunities for Testing on the JVM(Thu /07)
Spring Core
New in Spring Framework 5.0: Functional Web Framework(Tue/05)
Spring Framework 5.0 on JDK 8 & 9 (Wed /06)
Reactor in Action (Web /06)
Spring Framework 5: Hidden Gems(Wed/06)
It's a Kind of Magic: Under the Covers of Spring Boot (Web /06)
55 New Features in JDK 9 (Thu/ 07)
Servlet or Reactive Stacks: The Choice is Yours. Oh No... The Choice is
Mine!(Tue/ 05)
Design & Architecting
Designing, Implementing, and Using Reactive APIs(Web/06)
Cloud-Native Batch Processing with Spring Batch 4 (Tue /05)
Bringing New Technology to Legacy Land (Tue /05)
State or Events? Which Shall I Keep? (Tue /05)
Kafka Streams - From the Ground Up to the Cloud (Tue /05)
Cloud Event Driven Architectures with Spring Cloud Stream 2.0(Wed/06)
Spring Driven Industrial IoT Utilizing Edge, Fog, and Cloud Computing(
Wed/ 06)

3.
3
1. Spring Framework Core 살펴보기
2. Reactive Programming 개념이해하기
3. Demo
4. 어떻게 적용할 것인가?

4.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/

5.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Reactive

6.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
6
Spring Framework 5.0 Overview
• Back-Pressure(Reactive 데이터 흐름
제어)
• Reactive Spring Data
• Function Reactive Programming
• Project Reactor

7.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
• 6개월 단위 Major release
• Agile development
• JDK9: 2017/09
• JDK10: 2018/03
• JDK11: 2018/09
• LTS support release
• JDK8 (LTS)
• JDK11(LTS)
• 3 years
• No Overlap of support
JDK Release and Support model
Java 8 Adoption(Oct. 2017, Baeldung)
Java 8
Java 7
Java 6 Java 9

8.
8
1. Spring Framework Core 살펴보기
2. Reactive Programming 개념이해하기
3. Demo
4. 어떻게 적용할 것인가?

9.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Servlet and Reactive
Servlet 3.1 (2013)
Reactor (2013)
Servlet1.0 (1997) Servlet 3.0 (2009)

10.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
10
Servlet and Reactive

11.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
11
Servlet and Reactive

12.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
• 대안적 프로그래밍 방식
• 쉽고, 간결하고 에러가 줄어드는 비동기 이벤트 기반 프로그래밍
• 고성능, concurrency 코딩
• Reactive Stream 명세 (http://www.reactive-streams.org/ )
• WebFlux는 다양한 non-blocking API를 지원
Spring WebFlux를 이용한 Reactive Programming

13.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
13
멀티쓰레드 프로그래밍
• Keeping an unused ExecutorService alive
• Wrong thread-pool capacity while using fixed length thread-pool
• Unexpectedly-long blocking with Future‘s get() method

14.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Spring WebFlux – 기존 RestController 방식

15.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Spring WebFlux – RouterFunction 방식 (1/2)

16.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Spring WebFlux – RouterFunction 방식 (2/2)
https://spring.io/blog/2016/09/22/new-in-spring-5-functional-web-framework
https://github.com/myminseok/webflux-functional-mkim

17.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Spring WebFlux를 이용한 Reactive Programming
https://spring.io/blog/2016/04/19/understanding-reactive-types

18.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Reactive Spring Data – being Reactive

19.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
<T> List<T> findAll(Class<T>
entityClass, String collectionName);
<T> T findOne(Query query,
Class<T> entityClass);
…
<T> Flux<T> findAll(Class<T>
entityClass, String collectionName);
<T> Mono<T> findOne(Query query,
Class<T> entityClass);
…
Reactive Spring Data - ReactiveMongoOperations

20.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Reactive Spring Data - MongoDB

21.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Reactive Spring Integration

22.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Reactive Spring Integration
https://github.com/artembilan/spring-integration-s1p2017

23.
23
1. Spring Framework Core 살펴보기
2. Reactive Programming 개념이해하기
3. Demo
4. 어떻게 적용할 것인가?

24.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
• 샘플: https://github.com/rstoyanchev/demo-reactive-spring
• Spring Webflux
• WebClient
• Reactive Spring Data (@Tailable)
• Streaming Data from Reactive repository to Reactive Client
24
Spring Webflux & Spring Data Demo

25.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
샘플: https://github.com/myminseok/s1p-reactor-in-action
Reactor 테스트
• StepVerifier
Debugging
• Async pipeline을 Debug, tracing하려고 할 때 .checkpoint()를 활용.
Spring WebFlux를 이용한 Reactive Programming

26.
26
1. Spring Framework Core 살펴보기
2. Reactive Programming 개념이해하기
3. Demo
4. 어떻게 적용할 것인가?

27.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
• Networking
• Latency
• Failures
• Back-pressure(Data Flow Control)
• Highly Concurrent Operations
• Scalability
효과적인 Reactive Usecase
https://github.com/cloudfoundry/cf-java-client

28.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
28
Servlet or Reactive?

29.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
If it isn't broken, don’t fix it.
Imperative is simple until it is not
29
Servlet or Reactive?

30.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
• Spring Framework 5.x
• JDK 8 codebase (LTS), JDK9+ compatible
• Support Java EE Level 7( Servlet 3.1, JPA 2.1)
• Prepare to Java EE Level 8 (Servlet 4.x, JPA 2.x)
• Dropped support (Portlet, Velocity, JDO…)
• Spring Framework 5.x +
• Upgrade train(JDK 9->10 ->11(LTS))
• Spring framework 5.x building target to JDK11
• Spring Framework 4.3
• JDK6 codebase, JDK7,8,9 compatible
• Backport from Spring framework 5 (@UsesJava8 …)
30
Spring Framework & JDK 업그레이드 계획하기

31.
Unless otherwise indicated, these slides are © 2013 -2016 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
1. JDK Baseline Update
2. Web Servers
3. Libraries
• Jackson 2.9+ Hibernate 5.0+ EhCache 2.10+
4. Removed Packages, Classes and Methods
• Hibernate 5 (orm.hibernate3/hibernate4 dropped)
5. Dropped Support
• Portlet, Velocity, JasperReports, XMLBeans, JDO, Guava (replaced by the
Caffeine support
• Spring Framework 4.3.x (supported until 2020)
6. Common Logging
• spring-jcl
31
Spring Framework 5.0 적용하기
https://github.com/spring-projects/spring-framework/wiki/Upgrading-to-Spring-Framework-5.x

32.
32
링크: https://goo.gl/53aEtB
행사 종료 후
설문에 참여한 분들께는
보온병을 선물로 드립니다.
등록데스크에서 설문 완료 페이지를
보여주시고 선물을 받아가시길 바랍니다
실시간 Q&A
질문 등록하기!
설문지 이벤트
참여하기!