Introduction Here is the first part to this article. This article will cover how to set up and utilize QueryDSL with Spring Boot 3 application. Set up Dependency Let’s begin by adding dependencies to pom.xml. Spring Boot 3 uses Jakarta EE. Therefore, <classifier>jakarta</classifier> is added to all querydsl-* dependencies. Also, querydsl.version is included in…

Introduction In my previous project, the data access layer was implemented using Spring Data JPA because of these well-known reasons: Provides CRUD operations out of box Easy to create a custom query Supports pagination and sorting Easy to write unit tests for data access layer The client has told me that…

Background I would like to begin by expressing how fortunate it is to collaborate with a designer. At Tanzu Labs we work within a “balanced” team, which includes product managers, product designers and engineers. Therefore, I don’t need to worry too much about the user experience or how individual UI component…

This article covers how to create a Spring Boot application which can output a war file and how to deploy on Apache Tomcat. This application is based on Spring Boot version 3 & Java 17 with Apache Tomcat 10. Apache Tomcat 10 can be downloaded from here. Project Setup Note that gradle…

GraphQL Basics — Scalar Types Int Float String Boolean ID (Unique value serialized as String) Non-nullable fields are marked with !. Collection Types [Int]: List<Integer> Special Types Query: Get Mutation: Post, Put, Delete, Patch Subscription: SSE, WebSockets Enum Enums don’t always have to be mapped to Java Enum. They could be mapped to Java Strings as well. enum Brand {…

Chat Completions API is described as follows (link): Chat models take a list of messages as input and return a model-generated message as output. Although the chat format is designed to make multi-turn conversations easy, it’s just as useful for single-turn tasks without any conversation. There are libraries available to…

This article covers how to configure WireMock and MockWebServer for a Spring WebFlux application to stub for any external APIs the application might need. Implementation Currently, WebClient is used for calling the external APIs. @Configuration public class HttpProxyConfiguration { @Value("${tracker.url}") private String trackerUrl…

Here is the motivation on why a new source set was added: Have a source directory to differentiate from unit tests and integration tests. Have an ability to run unit tests and integration tests at different stages as we focus highly on unit tests when working on a feature. The…

I had a requirement to fetch user data from an external system. It was implemented using WebClient as part of declarative http client. Interestingly, the very first request after opening the application on a new browser tab returned Connection reset by peer error. This issue was solved by disabling keep-alive…