Spring Boot and Thymeleaf with CSS JavaScript processing using Gulp
This blog post will explain how to setup a Spring Boot project with server-side HTML rendering using Thymeleaf templates.
About Me
Hi, my name is Wim Deblauwe, a software developer specialized in Java, Spring, and JVM related tooling.
I wrote Taming Thymeleaf, a book to learn more about using Thymeleaf with Spring Boot. I also have a few open-source projects: one that makes it easy to do Spring Boot error handling, another for integration of Cypress with Testcontainers and a few others.
I blog regularly here about Spring Boot, Thymeleaf,Asciidoctor and other programming related subjects.
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Recent posts
Ensure JUnit test fails when Cypress tests fail
In my previous blog post on Running Cypress tests with TestContainers for a Spring Boot with Thymeleaf application, I explained how to run Cypress tests as part of a JUnit test. However, the example did not actually fail the test if there are test failures in Cypress. Oops :-)
In order to do that, we can use the support that Testcontainers has for watching the log output and parse that.
Running Cypress tests with TestContainers for a Spring Boot with Thymeleaf application
UPDATE: The full test class code in this post does not actually fail the test when the Cypress tests fail. See my updated example at ./blog/2019/06/16/ensure-junit-test-fails-when-cypress-tests-fail/[Ensure JUnit test fails when Cypress tests fail].
At the last ng-be conference I saw a demo of Cypress. Cypress allows to do functional testing of your web application, quite similar to Selenium for example, but still quite different.
Ever since that time, I wanted to try it out, but never got around to it until this week.
Announcing BIOB an binary object storage library
I am announcing a new open-source project I am working on: BIOB
It is still very early days, but there is already a fully functional local file system implementation and an in-memory implementation for testing. See https://github.com/wimdeblauwe/biob for full details and a usage example on how to use the library in your own project.
It does not depend on Spring or Spring Boot, but I have used it in that context so far because that is what I use for all of my projects.
Version 1.0.2 of Practical Guide to Building an API Back End with Spring Boot released
You can download an updated version of my book 'Practical Guide to Building an API Back End with Spring Boot' from InfoQ: https://www.infoq.com/minibooks/spring-boot-building-api-backend
The changelog can be viewed at https://wimdeblauwe.wordpress.com/my-spring-boot-book/
Switching between JDK 8 and 11 using SDKMAN
I have written about switching JDK versions on your mac before. With JDK 11 now being out, it is time to give an updated version.
Spring Boot book published via Infoq
I am so happy because today my Spring Boot book is finally available! See https://www.infoq.com/minibooks/spring-boot-building-api-backend for all the details.
Tip on migration to Spring Boot 2 when using Flyway
Spring Boot 1.5.x uses Flyway 3 while Spring Boot 2.x uses Flyway 5. According to the official migration guide for Spring Boot 2, you need to do 2 releases to be able to migrate an application from Spring Boot 1 to Spring Boot 2 if you are using Flyway:
First upgrade your 1.5.x Spring Boot application to Flyway 4 (4.2.0 at the time of writing), see the instructions for Maven and Gradle.
Datadog integration with AWS Elastic Beanstalk for Spring Boot application
If you have an application deployed on AWS Elastic Beanstalk and you want to add Datadog integration to it, then these instructions might help you out.
I started out with the instructions at https://www.datadoghq.com/blog/deploy-datadog-aws-elastic-beanstalk/ but they use the older version 5 of the datadog-agent and not the newer version 6.
In your source code, you normally have a .ebextensions folder to configure the Elastic Beanstalk deployment. Inside that folder, create the following files (Create directories as needed):
PageImpl JSON serialization with Spring Boot 2
During the migration of a Spring Boot application from 1.5.13 to 2.0.2, some of my Spring Rest Docs tests started failing. The reason being that some of my RestController s return a org.springframework.data.domain.PageImpl object (from Spring Data Commons).
@RestController public class MyRestController { @GetMapping public PageImpl<SomeDtoObject> listAll() { ... } } With Spring Boot 1.5.13, this results in JSON like this:
{ "content": [ { ... }, { ... }, .