what's new in spring boot 2.0

A Sneak Peek at Spring Boot 2.0

By Madhura Bhave / Phil Webb

@madhurabhave23 / @phillip_webb

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Agenda

• What’s New• Infrastructure upgrades

• Spring Framework 5

• What’s Changed• Configuration properties

• Gradle plugin

• Actuator endpoints

• What’s Evolving• Security

• Metrics

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What’s New

• Infrastructure upgrades


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What’s New

• Infrastructure upgrades


4



Infrastructure Upgrades

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8+ 8+

5.23



What’s New

• Infrastructure Upgrades


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Spring Framework 5

• Reactive Spring

• Functional APIs

• Kotlin support

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Spring Framework 5

• Reactive Spring

• Functional APIs

• Kotlin support

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Reactive Spring

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😀



Reactive Spring

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😱 🐌



Reactive Spring

Blocking

• Large thread pool required

• Each request gets its own thread

Non-Blocking

• Small thread pool

• Worker threads process events

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Reactive SpringServlet Stack

• Servlet container

• Servlet API

• Spring MVC

Reactive Stack

• Netty, Servlet 3.1, Undertow

• Reactive HTTP layer (Reactive Streams)

• Spring WebFlux

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Reactive Spring

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Mono<T> Flux<T>

Reactive Streams

Project Reactor


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Demo



Reactive Spring

• Non-blocking

• Event driven at the center

• More for scalability than speed

• You can still use Spring MVC

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Spring Framework 5

• Reactive Spring

• Functional APIs

• Kotlin support

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Functional APIs

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RouterFunction<?> route = route(GET("/person/{id}"),

request -> {

Mono<Person> person = Mono.justOrEmpty(request.pathVariable("id"))

.map(Integer::valueOf)

.then(repository::getPerson);

return ServerResponse.ok().body(fromPublisher(person, Person.class));

})

.and(route(GET("/person"),

request -> {

Flux<Person> people = repository.allPeople();

return ServerResponse.ok().body(fromPublisher(people, Person.class));

}))

.and(route(POST("/person"),

request -> {

Mono<Person> person = request.body(toMono(Person.class));

return ServerResponse.ok().build(repository.savePerson(person));

}));



Spring Framework 5

• Reactive Spring

• Functional APIs

• Kotlin Support

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What’s Changed

• Configuration properties

• Gradle plugin


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What’s Changed


• Gradle plugin


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Configuration Properties• Relaxed binding rules stay the same

• Uniform format for reading properties from the environment• Elements separated by dots

• Must be alpha-numeric

• Must be lowercase

• Hyphen can be used to separate words

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my.foo.hello-worldmy.foo.helloWorldmy.foo.hello_world

my.foo.helloworld



Configuration Properties

• Indices in environment variables

MY_VAR_1=a my.var[1]

MY_VAR_1_2=b my.var[1][2]

• Consistent behavior for Collections

• Better types, e.g. Duration “1s” “2m” “5d”

• Origin support

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At t r ibu t ion -NonCommerc ia l l i cense : h t tp : / / c rea t ivecommons.org/ l i censes/by -nc /3 .0 /23

Demo



What’s Changed


• Gradle plugin


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Gradle Plugin•bootRepackage replaced by bootJar & bootWar

• Tasks do not figure out what to do

• Plugin configures the tasks with sensible defaults

• Reacts to other plugins

• Explicit dependency management

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What’s Changed


• Gradle plugin


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Actuator Endpoints

• Endpoint annotations

•@Endpoint, @WebEndpoint, @JmxEndpoint

• Tech independent operations

•@ReadOperation, @WriteOperation, @DeleteOperation

• Tech specific extensions

•@EndpointWebExtension, @EndpointJmxExtension

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Actuator Endpoints

• Works with:

• Spring MVC

• Jersey

• Spring WebFlux

• Reactive health indicators

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What’s Evolving

• Metrics

• Security

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What’s Evolving

• Metrics

• Security

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Metrics

• Auto-configuration for metrics instrumentation by Micrometer *

• Hierarchical metrics replaced by dimensional metrics

• Facade over multiple monitoring systems

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* Introducing Micrometer Application Metrics - (Thursday 10:30am)



What’s Evolving

• Metrics

• Security

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Security

• Simpler security auto-configuration

• Auto-configuration backs-off easily

• Adding custom security is easy

• No ordering issues with WebSecurityConfigurerAdapter

• RequestMatchers for static resources and actuators

• Web actuator endpoints have consistent behavior

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Security

• OAuth 2.0

• Moving to Spring Security 5.0

• Support for multiple client registrations

• Authorization server/Resource server support

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Questions?

@madhurabhave23

@phillip_webb

#springone@s1p

https://github.com/mbhave/webflux-demo

https://github.com/mbhave/actuator-demo

https://github.com/mbhave/configuration-properties-demo

https://github.com/mbhave/webflux-demo

https://github.com/mbhave/actuator-demo

https://github.com/mbhave/configuration-properties-demo

what's new in spring boot 2.0

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