This article is part of a blog series that explores the newly redesigned Spring Cloud Stream applications based on Java Functions. In this episode, we are taking a deeper look into the file supplier and its Spring Cloud Stream file source counterpart. We will also see a MongoDB consumer and its corresponding Spring Cloud Stream sink. Finally, we will demonstrate how the File source and the MongoDB sink can be orchestrated together on Spring Cloud Data Flow as a pipeline.

Here are all the previous parts of this blog series.

• 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

• Case Study: HTTP Request Function and Processor

…

Hi, Spring fans! Welcome to another installment of This Week in Spring! It's been an insane week since we last spoke and things are only going to get nuttier between now and then! I've been heads down in my preparations for my SpringOne talks - one on Azure with Julien Dubois (@JulienDubois) and another on incorporating asynchronicity with Mario Gray (@MarioGray). I've been heads down working on my book Reactive Spring.

A few upcoming events worth noting:

• I'll be streaming on Twitch tomorrow (Wednesday), noon, PST. Follow me on Twitter @starbuxman for the link.
• I'll be presenting at the September edition of the Denver JUG to introduce RSocket. RSVP.
…

Hi, Spring fans! In this episode, Josh Long (@starbuxman) talks to Google Cloud's Elena Felder (@hellata) about building Reactor/Spring-based integrations for Google Cloud technologies like Google Cloud Spanner.

Hi, Spring fans! Well, here we are! Nearing the end of August 2020! I can't believe it! September follows August (last I checked) and with September comes SpringOne 2020! I am so excited about this mega (and virtual) event and I hope you'll consider joining us there!

On a personal note, today's moving day for my family and me, so I have to get back to that. But we do have a ton to get to so let's dive into it.

• A Bootiful Podcast: RSocket everywhere and Maciej Walkowiak on Spring Cloud AWS
• A Bootiful Podcast: Software Security in the Supply Chain
• A new video in the Spring Cloud AWS series, this one looking at how to scale out databases with RDS and Spring Cloud AWS.
• Case Study: HTTP Request Function and Processor
• CockroachDB & Spring Tutorials for Spring Data JDBC, JPA, & MyBatis
• Config file processing in Spring Boot 2.4
• Creating Efficient Docker Images with Spring Boot 2.3
• Getting started with Spring Cloud AWS - YouTube
• Hooking Into the Spring Bean Lifecycle
• How cf-for-k8s…

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

…

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…

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…

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
…

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
…