SPRING FRAMEWORK 5FAST AND FURIOUS

Aliaksei ZhynhiarouskiTechTalk, 2.2017

AGENDA

TIME TO LEARN MORE

▸ History of Spring Framework from version 1 to 5

▸ Current state of “Enterprise” Java and challenges

▸ What awaits us with Spring 5?

▸ Coding!

2002

PROTOTYPE IN THE BOOK

Rod Johnson “Expert One-on-One J2EE Design and Development”with no mention of Spring30k LOC under com.interface21 Check code on Github

Juergen Hoeller open source book code with new name Spring

where Spring means spring after J2EE winter

2003

INTERFACE 21 & SPRING 0.9

2004

SPRING 1.0

Others frameworks integration (Struts/Hibernate)

AOP support with AspectJ

New books about Spring

Big growth of popularity

2005

SPRING 1.2.6

400k Downloads

Lead AspectJ now with Spring team

2006

SPRING 2.0 & 1_000_000 DOWNLOADS

Spring Security

Spring Web Flow

Spring LDAP

2007

SPRING 2.5

Investments $10m & 3m Downloads

From Interface21 to SpringSource

Spring Integration is announced

Spring Webservice is announced

Spring Batch is announced

2008

GROOVYAcquired G2One – company behind Groovy & Grails

Spring Batch 1.0

Spring Integration 1.0

Spring Team behind projects like Tomcat, Apache HTTP Server

Cloud Foundry – PaaS providerHyperic – tools for monitoring Java

2009

SPRING 3.0 & VMWARE

SpringSource acquired by VMWare for $420m

Spring 3:

‣ JDK 5+

‣ Modularize uber Jar

‣ Comprehensive REST support

‣ Spring Expression Language

2010-2011

SPRING DATA & SPRING AMQP

VMWare bought RabbitMQ company

spring-data-commons

spring-data-jpa

spring-data-mongoDB

spring-data-redis

2013

SPRING 4.0 & PIVOTALPivotal was born

Reactor 1.0

Spring IO Platform announced

Spring Boot introduced

JDK 8 and WebSocket support

SPR-9044

2014-2015

SPRING BOOT

Spring Boot 1.0 Released

Spring XD 1.0 Released

Bye-Bye Groovy 😥

Spring Cloud available (with Netflix OSS)

Spring Framework 4.2.3 in the end of 2015

2016

SPRING FRAMEWORK 4.3

Last release in 4.3 branch

support until 2020

will work with JDK 6,7,8,9

and Tomcat 6-9

Spring Framework 5 M4Reactor 3

CURRENT STATE AND CHALLENGES

DO WE NEED TO CHANGE?

CURRENT STATE AND CHALLENGES

HOW TO ASYNC

LATENCY REAL MATTERS

RESOURCE UTILIZATION

IMPERATIVE CODE

SERVLET CONTAINER IN NUTSHELL

SERVLET CONTAINER IN NUTSHELL

FIX SERVLET CONTAINERS

THERE IS ANOTHER WAY

REACTOR/EVENT-LOOP

REACTOR/EVENT-LOOP

HOW TO WRITE NON BLOCKING

CALLBACKS }); }); }); });

COMPLETABLE FUTUREsince JDK 8

Completable Future + java.util.Stream

RX

CURRENT STATE AND CHALLENGES

NON-BLOCKING IO

LATENCY REAL MATTERS

RESOURCE UTILIZATION

REACTIVE CODE

REACTIVEX CRASH COURSE

Stream Abstraction▸ Functional, declarative programming model ▸ Combine, transform, reduce sequences ▸ Focus on what, not how

Stream (JDK8)

▸ Efficiently process collections ▸ Pull based and usable only once ▸ For non latency or infinite

Reactive Library▸ Stream(JDK8) like API ▸ Push based ▸ Latency sensitive and infinite seqs

FLUX<T>

MONO<T>

HOW TO WRITE NON BLOCKING

REACTIVE STREAMS

▸ Specification for non-blocking libs interoperability

▸ Collaborative effort: Netflix, Pivotal, RedHat, Twitter, Lightbend

▸ JDK9 adoption java.util.concurrent.Flow

▸ Only 4 Interfaces

http://www.reactive-streams.org

https://spring.io/blog/2016/04/19/understanding-reactive-types

ONLY 4 INTERFACES

REACTIVE STREAMS

The core concern of Reactive Streams is handling backpressure.

In a nutshell, backpressure is a mechanism that permits a receiver to ask how much data it wants to receive from the emitter. It allows:

▸ The receiver to start receiving data only when it is ready to process it

▸ To control the inflight amount of data

▸ Efficient handling of slow emitter/fast receiver or fast emitter/slow receiver use cases

SPRING 5

SPRING + REACTOR + RX = 🌞

REACTIVE STREAMS EVERYWHERE

REACTIVE STREAMS EVERYWHERE

UNDER THE HOOD

WHAT’S NEW

SPRING FRAMEWORK 5.0

Core updates‣ Java 8 in the core

‣ Java 9 full compatibility, no jigsaw

Web‣ HTTP/2 on client and server HTTP/2 Comes to Java

‣ Reactive Streams based controllers

‣ Alternatives to annotated controllers handlers design

‣ Lambda oriented HTTP routing & processing

‣ Kotlin

SPR-13716

WHAT’S NEW

SPRING FRAMEWORK 5.0

Roadmap‣ 5.0 M4 available now

‣ 5.0 RC1: Dec 2016/Jan 2017

‣ 5.0 GA wait for JDK9 GA

JDK 8+, Servlet 3.1, JMS 2.0+, JPA 2.1+, JUnit 5

Major baseline updates with Java EE 7

JAVA PROFESSIONALS BY

LINKS

Aliaksei Zhynhiarouskitwitter: @a_lithium

http://www.reactive-streams.org

https://spring.io/blog/2016/04/19/understanding-reactive-types

Notes on Reactive Programming Part I

Notes on Reactive Programming Part II

Notes on Reactive Programming Part III

https://github.com/aliaksei-lithium/spring5demo