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Repositories with Multiple Spring Data Modules 1. Introduction Sometimes we need to connect to more than one database technology in the same application. In this tutorial, we’ll explore the various configuration options when it comes to using multiple Spring Data modules in the same application. Let’s use a toy Spring… Continue Reading spring-multiple-data-modules
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The State of Java in 2018 I’ve been running the yearly “State of Java” survey for the last couple of weeks. It’s the 5th year of the survey and naturally the largest one yet, with 5160 developers taking the time to go through and answer. Let’s jump right into the… Continue Reading java-in-2018
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Avoid brittle tests for the Service layer Spring Testing Table of Contents 1. Overview 2. The Layers 3. Motivation and blurring the lines of the unit test 4. Conclusion 1. Overview There are many ways to test the Service Layer of an application. The goal of this article is to… Continue Reading testing-the-java-service-layer
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Spring Scheduling Annotations 1. Overview When single-threaded execution isn’t enough, we can use annotations from the org.springframework.scheduling.annotation package. In this quick tutorial, we’re going to explore the Spring Scheduling Annotations. 2. @EnableAsync With this annotation, we can enable asynchronous functionality in Spring. We must use it with @Configuration: @Configuration @EnableAsync… Continue Reading spring-scheduling-annotations
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Make It Easy to Schedule to Reddit 1. Overview In this article, we’re going to continue the case study and add a new feature to the Reddit application, with the goal of making it much simpler to schedule articles. Instead of slowly adding in every article by hand in the… Continue Reading schedule-to-reddit-from-website-feed
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Difference between <context:annotation-config> vs <context:component-scan> Spring 1. Overview In this tutorial, we’re going to learn about the differences between two major XML configuration elements of Spring: <context:annotation-config> and <context:component-scan>. 2. Bean Definitions As we all know, Spring provides us with two ways to define our beans and dependencies: XML configuration and Java… Continue Reading spring-contextannotation-contextcomponentscan
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A CLI with Spring Shell 1. Overview Simply put, the Spring Shell project provides an interactive shell for processing commands and building a full-featured CLI using the Spring programming model. In this article, we’ll explore its features, key classes, and annotations, and implement several custom commands and customizations. 2. Maven… Continue Reading spring-shell-cli
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Fourth Round of Improvements to the Reddit Application 1. Overview In this tutorial, we’ll keep improving the simple Reddit application that we’re building as part of this public case study. 2. Better Tables for Admin First, we’ll bring the tables in the Admin pages to the same level as the… Continue Reading reddit-web-app-improvements-4
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CDI Interceptor vs Spring AspectJ 1. Introduction The Interceptor pattern is generally used to add new, cross-cutting functionality or logic in an application, and has solid support in a large number of libraries. In this article we’ll cover and contrast two of these major libraries: CDI interceptors and Spring AspectJ.… Continue Reading cdi-interceptor-vs-spring-aspectj
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REST Query Language Over Multiple Tables with Querydsl Web Support REST Spring 1. Overview In this tutorial, we’ll continue with the second part of Spring Data Querydsl Web Support. Here, we’ll focus on associated entities and how to create queries over HTTP. Following the same configuration used in part one, we’ll… Continue Reading rest-querydsl-multiple-tables
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