8 posts tagged with "spring-boot"

I’ve created a sample Spring Boot app that demonstrates useful scenario of asynchronous publish / subscribe model. It could be useful in many ways. Idea is that, for example, you have some API handling some web requests, and apart from functionality it provides, it also publishes some event, so that some other thread can react upon it, with main functionality still being processed with request handling thread. Or even shorter – request handling thread will do it’s job, and publishes some event (using Java annotation), and some other background thread will subscribe to event and process it. You can use it for scenario you register user with your API, and publish user registered event, and in background you can subscribe to it by sending out e-mail to end user.

As part of my effort to adopt Spring Boot I noticed that I need to learn new view technology in Java ecosystem, since Spring Boot doesn't promote JSP, which I was used to using. I've explored alternatives a bit, and decided to give a shot to Thymeleaf as templating engine.

Traditional exception handling in JUnit tests​

You’re probably used to testing code that throws exceptions in either one of the following two ways:

• JUnit's @Test annotation expected parameter

Ladies and gents, once again I’m sharing some sample app, this time we are building sample Spring Boot app implemented in Kotlin, talking to http://data.nba.net/ API to help us get some interesting, NBA related data. In this case we’re just listing NBA teams, but you extend this sample even further.

Ladies & Gents, I prototyped just a small app that could help you print out some basic environment related information by exposing a few Rest controller endpoints.

Recently I've started playing with Kotlin programming language, and wanted to give it a try. Kotlin gives us possibility to write quite concise code.

Let's build some simple example that demonstrate ease of Spring Boot use when building applications that need to connect to, in this case - MySql database. Final output will be single - standalone jar file that can be executed as java -jar my-boot-artifact.jar and will be able to process http requests. Application is intentionally made simple, there's no big architecture inside it - you can see database code inside Controller method, which you'd normally not use for real world projects.

If you're interested in JUnit testing your Spring MVC controllers, feel free to visit Github repo containing very simple example of Spring MVC controller and JUnit test class testing it's endpoints. Project is implemented using Spring Boot framework.