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How to store a bearer token in memory during a REST request in Spring

This class intercepts REST requests, gets the bearer token, and store it in memory. public class BearerTokenInterceptor extends HandlerInte...

How to run a liquibase job as a maven build

When liquibase is integrated into a maven project we can take advantage of the liquibase maven plugin to create a maven build for us. This w...

Install Java alternatives in Ubuntu

This script will let you install Java alternatives in Ubuntu. In short, you can install multiple versions of Java and activate any one of th...

Install OpenJdk-11 in Ubuntu

This tutorial will help you install OpenJDK 11 on your Ubuntu machine. For Windows, you can simply download the zip distributable provided ...

How to use OpenCV Library in a Java Application

At the heart of many machine vision solutions is a software package named OpenCV. Since I'm a Java developer, I've wondered if I can...

How to debug Tomcat using Intellij IDE

This set of instructions will guide you on how to enable debugging of your Java project running on Tomcat inside the Intellij IDE. 1. Start...

How to export and import a MySQL database running on Docker

This series of commands serve as a guide in migrating a MySQL database from one docker instance to another. 1. Computer where source MySQL d...

How to Generate Amazon Cognito Access Token Using Postman

In this tutorial, we will learn how to generate an access token in Amazon Cognito using Postman.  1. Introduction When testing a secured RES...

How to Pull a Git Repository with Sub Modules

In some cases, we might need to add a sub-module to our Git repository. A sub-module is actually a pointer that points to another Git reposi...

How to Convert JPA to CDI Events

Learn how to convert JPA to CDI events. This is typically used in observer pattern when you want to do something after an operation has been...

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