In this article I will, using a test-case, show how to publish and consume MQTT messages using the reactive HiveMQ client library. I will use the Mosquitto MQTT broker for the test. The example application will be implemented using Spring Boot 3 and Java 17. The example will initially allow unauthenticated access that later will… Read More »
In this article I will show how to reduce the set of application configuration properties available to a Spring Boot test. The reason for me wanting to do this is to be able to write tests for code that relies on a dynamic set of configuration properties. The source-code of the completed example project can… Read More »
In this article I will show how I added disk-space metrics to the set of default metrics made available for scraping by Prometheus. There are a few ways to accomplish this but I have chosen to use data from the Spring Boot Actuator health data. A complete Spring Boot application with disk-space metrics is available… Read More »
The following are a few words and some simple examples showing how to use Spring Data DynamoDB to store and retrieve data in a DynamoDB database. In the example, which consists of a few tests, I will use a local instance of DynamoDB running in a container. No prior knowledge of DynamoDB is assumed, though… Read More »
Due to problems with PayPal, I have decided to move the sales of my book Core Spring 5 Certification in Detail to Kobo. Many thanks to LeanPub for the time that has been – they have been very friendly and helpful!
For quite some time now I have thought it would be very useful to have some type of id associated with the processing of a request logged in connection to the log messages generated when the request is processed. This in order to be able to query Elasticsearch or similar for all the logs generated… Read More »
Just a short note to say that my book Core Spring 5 Certification in Detail has been updated to reflect the curriculum released by Pivotal in May 2019. Thanks for your patience if you have been waiting for this update! Please do not hesitate to contact me if there are any errors, omissions or with… Read More »
After Pivotal have changed the topics of the Spring 5 certification, I have received several requests to update my book Core Spring 5 Certification in Detail. First of all, I want to thanks everyone for their encouragement and patience. It has been a very busy summer and autumn for me, but this is a short… Read More »
It’s been a long time since I started looking at Spring Integration 5 and after miscellaneous interventions, such as a book on the Spring Core certification, having moved and a job that provides a never-ending stream of surprises, I am finally back! This article is an article in a series of articles introducing Spring Integration… Read More »
Update: The Core Spring 5 Certification in Detail book has been moved to Kobo. I am happy to announce that my book Core Spring 5 Certification in Detail is now completed! Thanks to all readers for the patience. Thanks for the kind words left here in the comments and on Leanpub. I also want to… Read More »