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Got 15 minutes? Learn how to build a functional, secure Spring Boot app complete with user login. Try Okta + OAuth 2.0 free! Create a Free Developer Account! You’ve built a microservices architecture with Spring Boot and Spring Cloud. You’re happy with the results, and you like how it adds resiliency to your application. You’re also pleased with how it ...

Do you want to know what is the best investment you can make with your time and money? Knowledge As a software developer you should be constantly acquiring new skills. This is the best way to advance your career and enjoy the rewards (monetary, emotional etc.). Towards that direction you should be reading books, devouring technical articles and staying informed ...

Optimising Enterprise Java for Microservice Architecture The Eclipse MicroProfile initiative was launched at JavaOne 2016, the brainchild of server vendors and Java user groups, in order to address the shortcomings in the Enterprise Java microservices space. The pace of Java EE releases slowed to a point where it was unable to meet the challenges of the rapidly advancing microservice trend. ...

This post is a follow up post to a few that I have written recently relating to writing a HATEOAS service and handling exceptions with Spring (Applying HATEOAS to a REST API with Spring Boot and Global exception handling with @ControllerAdvice). Now that we have looked through setting up a service and how to add some error handling via controller ...

Java 9 delayed so many times because of Project Jigsaw, and you may be heard a lot of thing about modules, modularity, and other stuff, so, what it’s all about? What the heck is modularization and what do we mean by modularized platform? Java Platform Module System (JPMS)? Is it going to be a revolution in Java ecosystem? This post is my ...

This post is based on the common questions raised about registry mounting and how it works etc. Below are the main questions people ask: 1). How mounting works? 2). What is the difference between Config Registry and Governance Registry? 3). Can I use databases other than H2 for Local Registry? 4). What is meant by mount path and target path? ...

As described in the previous post, we have four different garbage collectors available in HotSpot JVM. There are some significant differences between them, but the actual concepts behind the algorithms which are used to do the actual job are quite similar. In this short post, I will try to explain three basic algorithms: Mark-sweep Mark-sweep-compact Mark-copy GC Roots Before we ...

Gmail users can use Gmail’s SMTP server smtp.gmail.com to send emails from their Spring Boot apps. For this let us do some setup in the app: Provide SMTP connection properties in the application.properties file: spring.mail.host=smtp.gmail.com spring.mail.username=<your gmail/google app email> spring.mail.password=***** spring.mail.port=587 spring.mail.properties.mail.smtp.starttls.enable=true spring.mail.properties.mail.smtp.auth=true spring.mail.properties.mail.smtp.starttls.required=true Use Spring Boot Email tools library – which is a wrapper over Spring Boot Email starter library. ...

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Simple, effective and safe concurrency was one of the design principles of RxJava. Yet, ironically, it’s probably one of the most misunderstood aspects of this library. Let’s take a simple example: imagine we have a bunch of UUIDs and for each one of them we must perform a set of tasks. The first problem is to perform I/O intensive operation per ...