Learn how to create a custom, modular JRE that only contains the bare minimum files using jlink.
Here's what I've written (so far):
TransactionRequiredException Error
Filed under Persistence
Learn about the cause of the TransactionRequiredException error and how to solve it.
Spring Boot Reactor Netty Configuration
Filed under Spring Boot
Learn about different configuration options for a Reactor Netty server in a Spring Boot application
Spring Boot Consuming and Producing JSON
Filed under JSON, Spring, Spring Boot
Learn how to consume and produce JSON content in a typical CRUD REST service developed with a Spring Boot
Kotlin Scope Functions
Filed under Kotlin
Explore Kotlin scope functions and their use cases.
Java Weekly, Issue 273
Filed under Weekly Review
A good week in the Java and Spring ecosystems, as Java 12 is released, and a nice write-up on Spring’s @ConfigurationProperties annotation.
Getting and Verifying Response Data with REST-assured
Have a look at how to use REST-assured to validate and extract the response from a REST endpoint
Spring Boot with Hibernate
Filed under Spring Boot, Spring Persistence
A quick, practical intro to integrating Spring Boot and Hibernate/JPA.
A Java Web Application Without a web.xml
Filed under Java EE
Learn how to use the Java Servlet 3.0 annotations instead of a web.xml file
RxJava Hooks
Filed under Library
Learn about the various RxJava lifecycle hooks and how can we implement them
Method Inlining in the JVM
Filed under Java
Learn about the method inlining in the JVM and how the Just-In-Time compiler achieves it.
Using @Autowired in Abstract Classes
Filed under Spring
Learn the differences of using @Autowired on abstract classes vs. concrete classes
Making a JSON POST Request With HttpURLConnection
Filed under Java
A quick and practical introduction to issuing POST requests using HttpURLConnection.
How to Return 404 with Spring WebFlux
Filed under Spring Web
1. Overview With Spring Boot 2 and the new non-blocking server Netty, we don’t have the Servlet context API anymore, so let’s discuss the way how we can express different kind of HTTP status codes, using the new stack. 2. Semantic Response Status Follow standard RESTful practice, we naturally need to make use of the […]
Java Weekly, Issue 272
Filed under Weekly Review
A great write-up on conditional Spring bean annotations, and an overview of JVM memory and the challenge of tuning it for optimal performance.
Spring Properties File Outside jar
Filed under Spring
Learn how to load Spring properties from outside the jar package
Mapping Multiple JSON Fields to a Single Java Field
Learn how to convert multiple formats JSON into the same Java object.
Split a List into Parts in Kotlin
Filed under Kotlin
Learn several methods for splitting up a list of items into parts in Kotlin.
Resolving “Failed to Configure a DataSource” Error
Filed under Spring Boot, Spring Data
Learn what causes the Spring Boot error “Failed to configure a DataSource” and how to resolve it
Eclipse Error: web.xml is missing and failOnMissingWebXml is set to true
Filed under Java EE
Learn how to fix the eclipse error: web.xml is missing and failOnMissingWebXml is set to true