https://docs.spring.io/spring-security/reference/servlet/architecture.html Security Architecture Common Components Authentication SecurityContext non-Common Components non-Reactive...

In a multithreaded application, there are different types of cases which you would like to control: when an async block is evaluated whether to memoize (cache) the result of an async block,...

Let's admit it: Many of us who first included/upgraded Spring Security to 4.x+ were shocked when all of a sudden even our simplest login page starts giving 302s and bouncing back like this q...

In a nutshell, the last part of this blog shows a fancy way to split an input Spring Cloud stream into different output streams using reactive functions like the following (taken from the of...

For those working with Spring Boot REST API, there should be already countless occasions that you have encountered errors like this: { "timestamp": "2022-01-19T14:36:29.443+...

Background I have been hosting an application for a friend in Google Cloud Platform for years, and yes I admit the original architecture and build process are lame -- I just packaged my Java...

Let me start with a question: Will this Flux break? public static void main(String[] args) { Flux.interval(Duration.ofMillis(100)) .concatMap(i -> Mono.just(i) .delayElement(Du...

I do not make videos often, and when I do it's at most a few simple video strips joined together which I make with TikTok's video editor. Well my son is graduating from Kindergarten this Sum...

My first serious application using Kafka is Spring Cloud Functions with Webflux. While exploring its (lack of) documentation and related tutorials, I turned out finding lots of stuff along t...

Motivation The project that I work on is a vast net of 40+ microservices, mainly divided into Apps (those with UI code) Services (all the heavyweight logic and interfacing downstream/upstre...

This seems one of the hot searches for Reactor, at least when I type onErrorContinue in Google, onErrorResume would pop up beside it. Let me paste my testing code with some of my interpretat...

Aha, my first blog post. As a guy who missed the early days of Spring, it's sometimes confusing to see how many different ways the same thing could be done. Anyway I think I've experimented...