Introduction

We began this series by introducing the new stream applications based on Java functions, and function composition. The previous entry presented a tutorial for building a simple stream application and running it in Spring Cloud Data Flow. Today we explore the HTTP Request Function and present examples of how to use it.

In case you missed it, the prior posts in this series are:

• Introducing Function Based Streaming Applications

• Function Composition with Streaming Applications

• How to Build a Supplier and Source Application

• How to Build a Consumer and Sink Application

• Build and Run a Simple Stream Application

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On behalf of the team and everyone who has contributed, I’m happy to announce that Spring Initializr 0.9.1 has been released and is now available from repo.spring.io and Maven Central.

This release includes 2 fixes. Thanks to all those who have contributed with issue reports and pull requests.

GitHub | Issues | Documentation | Stack Overflow | Gitter

This is an update to the original blog post about creating docker images with Spring Boot 2.3. There were a few things related to image creation that changed between the first milestone of Spring Boot 2.3 and the GA release.

The two new features introduced in Spring Boot 2.3 to help improve image creation techniques were: layered jars and buildpack support.

Layered Jars

The layered jar feature evolved quite a bit as we started adding support for custom layers. While the need to express layers that the jar should be split into for image creation was evident, changing the format of the jar to do so no longer seemed necessary. Spring Boot 2.3 includes support for layering a jar using a layers.idx file. The layers index file provides a list of layers and the parts of the jar that should be…

On behalf of the community, I’m pleased to announce the release of Spring Security 5.4.0-RC1! You can find the complete details in the release notes and the highlights below:

OAuth 2.0

gh-8903 - Allow for custom ClientRegistration.clientAuthenticationMethod

gh-6489 - Simplify retrieving Introspection-specific attributes

Web

gh-8804 - Remove need for WebSecurityConfigurerAdapter

gh-8599 - Reactive SwitchUserWebFilter for user impersonation

gh-8854 - Add AuthenticationConverterServerWebExchangeMatcher

Kotlin

gh-8783 - Support custom filter in Server Kotlin DSL

SAML 2.0

gh-8887 - Add…

Spring Boot 2.4.0.M2 has just been released, and it brings with it some interesting changes to the way that application.properties and application.yml files are loaded.

If your applications use the fairly typical setup of only using a single application.properties or application.yml file, then you’ll probably not notice any difference. If, however, you have applications that use more complex setups (such as profile specific properties), you might want to read on to learn about what we’ve changed and why.

Why We’re Making These Changes

With recent versions of Spring Boot we’ve been working hard…

On behalf of the team and everyone that contributed, I am pleased to announce that the second milestone of Spring Boot 2.4 has been released and is available from our milestone repository. This release closes just over 250 issues and pull requests.

If you're trying this release with an existing Spring Boot 2.3 project, please note the slight change in the format of the version. 2.4.0-M2 is using our new versioning scheme.

Highlights of this second milestone include:

• Spring Framework 5.3 M2
• Spring Data 2020.0.0.M2
• An update to the way that application.properties and application.yml files are processed, including import support and support for volume mounted config trees.
• A a significant overhaul of the Neo4j support.
• Numerous other dependency upgrades
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Hi, Spring fans! In this installment Josh Long (@starbuxman) has RSocket on the brain with his latest talk, RSocket Revolution, the new RSocket chapter in his book Reactive Spring, and the work he's doing on Spring Retrosocket, a declarative Feign-like RSocket client. Then, Josh talks to Spring ecosystem luminary Maciej Walkowiak (@maciejwalkowiak) about what he's doing at the helm of Spring Cloud AWS.

• Spring Cloud AWS
• Maciej's recent video on getting started with Spring Cloud AWS on his excellent YouTube channel Spring Academy
• Josh's book Reactive Spring has been updated with a new whopping 70+ page chapter on RSocket
• Josh's The RSocket Revolution talk
• Spring Retrosocket - a declarative client for RSocket à la Feign or Retrofit
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Hi, Spring fans! I have been developing a new talk and I finally got a chance to do a pre-recorded version of it for a keynote for a conference (in China) recently, and want to share the content with you all, so I'm premiering it here, too. This talk, The RSocket Revolution, is about 38 minutes and looks at:

• some of the new features in Spring Boot 2.3x including GraalVM-capable native images
• the basics of RSocket
• fundamentals with RSocket @Controllers in Spring Framework
• Toshiaki Maki's fantastic rsc RSocket client
• Declarative, Feign-like clients with Spring Retrosocket
• The RSocketRequester to support making requests of RSocket services on the JVM
• Spring Integration's reactive and RSocket support
• Bidirectional communication - where both client and service separately initiate the communication - using RSocket
• Securing RSocket endpoints with Spring Security and RSocket metadata
…

On behalf of the Spring Batch team, I am pleased to announce that Spring Batch 4.3.0-M2 is now available from our milestone repository.

What’s new?

This release comes with a number of new features and enhancements that you can find in the release notes, but here are the major highlights:

1. Kafka support enhancements

By default, the KafkaItemReader reads a topic from the beginning. When we initially introduced this reader in v4.2, it was not possible to configure it to read records from a custom offset. In this release, we added this feature. As a result of this addition, it is now possible to…