Enterprise Java

We developers like abstraction.  Without it, we could not build applications.  Our programming disciplines even require that we code to abstractions and avoid coupling our code to detailed implementations. However, what is the right abstractions for your application? Sadly, the choice of abstractions really comes from our choice of framework.  Frameworks are basically abstract solutions that we extend to solve ...

TestNG is a testing framework created by Cédric Beust and helps to cater a lot of our testing needs. It is widely used in Selenium. Wondering on what NG stands for? Well, it refers to ‘Next Generation’. TestNG is similar to Junit but is more powerful to it when it comes to controlling the execution flow of your program. As ...

“I love writing authentication and authorization code.” ~ No Java Developer Ever. Tired of building the same login screens over and over? Try the Okta API for hosted authentication, authorization, and multi-factor auth. Deploying applications is hard. Often you need console access to the server from which you pull the latest code and then manually instantiate into your container. In ...

Introduction: In this tutorial, we’ll learn to define and use a many-to-many entity association using Hibernate @ManyToMany annotation. Context BuildUp: To follow along with this tutorial, let’s say we have two entities – Employee and Qualification: As we know, one employee can multiple qualifications. Also, there can be N number of employees with a specific qualification. It clearly means that the Employee and Qualificationentities share a Many-to-Many relationship. Maven Dependencies: In ...

Though it’s not mandatory for a Java or Web developers to learn NoSQL database the world is moving in that direction and both Java and Web developer should be familiar with NoSQL databases. If you are wondering what is NoSQL database means then here is a quick overview. A NoSQL database refers to non SQL, non-relational or not only SQL) ...

Beyond Spring’s Dependency Injectiononly solving 1/5 of the Inversion of Control problem, Spring Reactive bases itself on the event loop. While there are other popular event loop driven solutions (NodeJS, Nginx), the single threaded event loop is a pendulum swing in the other direction from thread-per-request (thread pools). With event loops competing against thread-per-request is there not some pattern that ...

Apache JMeter is an excellent tool for simulating user load on a web application in order to test performance. You can easily build a test plan by specifying the number of users and the interval between requests, and JMeter will then spawn a thread per user and hit your webapp. At the end of the test, you will get a ...

In this article, we will look at authenticating Single page application (built using Vue.js) with Amazon Cognito using OAuth protocol. In our previous article we integrated a server side application with Amazon Cognito. Scaffolding a Single Page Application We will use vue-cli to create an empty Vuejs application. Vue CLI can be installed by following the instructions here. Let’s create ...

Introduction: Identifiers in Hibernate model the primary key attribute of an entity. It helps us to uniquely identify a JPA entity. Every entity must define an identifier. Also, it can be either simple or composite. We can define a Hibernate identifier in several ways. In this tutorial, we’ll learn how to do so. Simple (Single-Valued) Identifier: If we have a ...