One of the many salient features of Java 11 is the ability to directly run a single file of Java source code without the need to compile the source code first. Complementing JShell, this feature helps in learning Java and in writing simple utility applications and CLIs. Say you created…

As you may know, JDK 9 introduced a native module system to design and build applications from a host of individual, independent modules that communicate with each other over well defined public interfaces. Some of the advantages of using the Java module system are: Strong encapsulation that promotes maintainability since…

This article will walk you through the steps that can be used to install and setup a Spinnaker instance on Kubernetes that’s behind a corporate proxy. We will use Halyard on docker to manage our Spinnaker deployment. For a super quick installation, you can use Spinnaker’s Helm chart Prerequisites Make sure…

This article walks you through the steps required to install and configure Docker and Kubernetes on a bare metal or virtual machine running Oracle Linux (OL) 7.x that’s behind a corporate proxy. Prerequisites Make sure you meet these prerequisites: OL 7.x using Unbreakable Enterprise Kernel Release 4 (UEK R4) or later …

At Oracle Commerce Cloud, we strive to build and equip our customers with powerful APIs and tools to manage their commerce sites. We’ve recently released a new set of APIs and tools that will allow our customers to create rules that can influence the order of product listings presented to…

You must have heard about the new kid on the block––Helidon from Oracle. It is an open source Java framework that enables one to write, among other things, lightweight microservices using functional and reactive programming paradigms. One can use Helidon’s simple yet powerful core reactive web server to quickly build…

Antlr is a powerful tool that can be used to create formal languages. Vital to the formalization of a language are symbols and rules, also known as grammar. Defining custom grammar and generating the associated parsers and lexers is a straightforward process with Antlr. Antlr’s runtime enables tokenization of a…

Introduction Utilities like grep, awk and sed are very powerful command line tools to have in one’s arsenal when dealing with text search and text processing tasks. Having said that, I seldom use them since most times my favorite IDE gets the job done for me. On occasion, I google for…