more and more
Guide to Java EE JTA 1. Overview Java Transaction API, more commonly known as JTA, is an API for managing transactions in Java. It allows us to start, commit and rollback transactions in a resource-agnostic way. The true power of JTA lies in its ability to manage multiple resources (i.e.… Continue Reading jee-jta
getdocs
Deploy Application at Tomcat Root 1. Overview In this quick article, we’ll discuss deploying a web application at the root of a Tomcat. 2. Tomcat Deployment Basics and Terminology First, the basics of deploying an application to Tomcat can be found in this guide: How to Deploy a WAR File… Continue Reading tomcat-root-application
getdocs
Difference Between @Size, @Length, and @Column(length=value) 1. Overview In this quick tutorial, we’ll take a look at JSR-330‘s @Size, Hibernate‘s @Length and JPA @Column‘s length attribute. At first blush, these may seem the same, but they perform different functions. Let’s see how. 2. Origins Simply put, all of these annotations… Continue Reading jpa-size-length-column-differences
getdocs
Guide to Passay 1. Introduction Nowadays, most web applications have their password policy – which is, simply put, created to force users to create difficult to break passwords. To generate such passwords or validate them we can make use of Passay library. 2. Maven Dependency If we want to use… Continue Reading java-passay
getdocs
Introduction to Apache Flink with Java 1. Overview Apache Flink is a Big Data processing framework that allows programmers to process the vast amount of data in a very efficient and scalable manner. In this article, we’ll introduce some of the core API concepts and standard data transformations available in… Continue Reading apache-flink
getdocs
A Guide to Creating Objects in Java 1. Overview Simply put, before we can work with an object on the JVM, it has to be initialized. In the following sections, we’ll take a look at various ways we can initialize primitive types and objects. 2. Declaration vs. Initialization Let’s start… Continue Reading java-initialization
getdocs
Java Web Weekly 43 At the very beginning of last year, I decided to track my reading habits and share the best stuff here, on Baeldung. Haven’t missed a review since. Here we go… 1. Spring and Java ===== >> Intersection Types to give Lambdas Multiple Personalities [javaspecialists.eu] You’re probably… Continue Reading 2015-week-review-43
getdocs
JPA @Embedded And @Embeddable 1. Overview In this tutorial, we’ll see how we can map one entity that contains embedded properties to a single database table. So, for this purpose, we’ll use the @Embeddable and @Embedded annotations provided by the Java Persistence API (JPA). 2. Data Model Context First of… Continue Reading jpa-embedded-embeddable
getdocs
Java Type System Interview Questions 1. Introduction Java Type System is a topic often brought up on technical interviews for Java developers. This article reviews some important questions that are asked most often and may be tricky to get right. 2. Questions ==== Q1. Describe the Place of the Object… Continue Reading java-type-system-interview-questions
getdocs
Spring Security 5 – OAuth2 Login 1. Overview Spring Security 5 introduces a new OAuth2LoginConfigurer class that we can use for configuring an external Authorization Server. In this article, we’ll explore some of the various configuration options available for the oauth2Login() element. 2. Maven Dependencies In addition to the standard… Continue Reading spring-security-5-oauth2-login
getdocs