Dimitri's tutorials about software development with Java and JavaScripthttps://dimitri.codes/https://dimitri.codes/authorization-server/https://dimitri.codes/authorization-server/Spring Authorization Server became a part of Spring Security 7. In this blogpost, we will explore what it is and how to use it.Wed, 24 Dec 2025 00:00:00 GMThttps://dimitri.codes/opentelemetry-starter/https://dimitri.codes/opentelemetry-starter/Spring Boot introduced its own starter for OpenTelemetry in Spring Boot v4.0.0. This makes it easier to send logs, metrics and traces to any OpenTelemetry-backend. In this blogpost, we'll explore how to use this new starter.Tue, 23 Dec 2025 00:00:00 GMThttps://dimitri.codes/spring-retry-core/https://dimitri.codes/spring-retry-core/Spring Retry is no more... or at least not as a separate library. Instead of that, you can now utilize retry-related functionality within Spring Core! Which functionality? That's what this blogpost is all about.Mon, 22 Dec 2025 00:00:00 GMThttps://dimitri.codes/jsonmapper/https://dimitri.codes/jsonmapper/Spring Boot 4 includes an upgrade to Jackson 3. In this blogpost I'll talk about some of the big changes in Jackson 3.Sun, 21 Dec 2025 00:00:00 GMThttps://dimitri.codes/actuator-health-probes/https://dimitri.codes/actuator-health-probes/Spring Boot Actuator's liveness and readiness probes have been enabled by default since Spring Boot 4. What better time could there be to explore the possibilities of these probes?Sat, 20 Dec 2025 00:00:00 GMThttps://dimitri.codes/multi-factor-authentication-spring-security/https://dimitri.codes/multi-factor-authentication-spring-security/Spring Security 7 made it possible to easily set up Multi-Factor Authentication within your applications. This allows you to combine any of the authentication methods Spring provides and create an even more secure setup.Fri, 19 Dec 2025 00:00:00 GMThttps://dimitri.codes/dynamic-bean-registration-spring/https://dimitri.codes/dynamic-bean-registration-spring/Spring has a new way of registering beans programmatically called the BeanRegistrar. In this tutorial I'll talk about how and when to use it.Thu, 18 Dec 2025 00:00:00 GMThttps://dimitri.codes/resttestclient/https://dimitri.codes/resttestclient/Spring Boot 4 introduces us to a new testing utility called RestTestClient. RestTestClient provides a uniform experience when testing your API's regardless of whether you want to write a unit test, integration test or end-to-end test.Wed, 17 Dec 2025 00:00:00 GMThttps://dimitri.codes/api-versioning-spring-boot/https://dimitri.codes/api-versioning-spring-boot/Say goodbye to manual versioning your REST API's and hello to the new API versioning within the Spring framework.Tue, 16 Dec 2025 00:00:00 GMThttps://dimitri.codes/jmsclient/https://dimitri.codes/jmsclient/WebClient, RestClient and JdbcClient. Over the past few years, Spring has been introducing new fluent clients in stead of the older clients that relied on method overloads (RestTemplate and JdbcTemplate). Spring 7 adds a new one to this list, by introducing us the new JmsClient!Mon, 15 Dec 2025 00:00:00 GMT