Introduction to the Keytool utility The keytool utility is a command-line tool included with the Java Development Kit (JDK) that allows users to manage the keystore that contains their keys and certificates. The keystore is a repository of security certificates, either generated by the keytool or imported from other sources, that can be used to … Read more
Overview In this quick tutorial, I will show you how to configure Spring logging to Elasticsearch so you can search, visualize and do many useful things with your log. Things that you cannot do by looking at the console output. Let’s get started. Create ELK stack using Docker Compose If you don’t have Elasticsearch running … Read more
Overview There are times you need to do some start-up work when your Spring application launch. One of the methods is to use the CommandlineRunner interface. In this post, I’m going to show you how to use this interface to run startup tasks with flexibility. Let’s get started. Meet the CommandlineRunner interface The CommandlineRunner interface … Read more
Overview In this post, I will show you how you can quickly test the email-sending function of your application using MailHog. The application I’m demonstrating is a Spring Boot web app. However, you can use the code in almost all applications. Let’s get started. Setup MailHog MailHog is a fantastic tool for developers to test … Read more
Overview This post provides you code snippets so you can start working with AWS S3/Digital Ocean Spaces via java SDK quickly. You can use AWS S3 SDK to access DigitalOcean Spaces. Create key pair to feed to the client Before working on the code, you need to create a key pair so you can access … Read more
With Spring AOP, you can simply use the @Transactional annotation to handle transactions in your app.