Posted on

Hands-On GitOps With OneDev and Kubernetes

Set Up Kubernetes Cluster

First, we need a Kubernetes cluster. You may use an existing one or set up a new one. For this tutorial, we chose to use GKE (Google Kubernetes Engine).

Just follow the quick start to create a cluster. To save your money, the default pool with only one node is sufficient for our testing. For node image type, use the default Container-Optimized OS; for machine type, please select one with at least 8G mem. After creating the cluster, go ahead to configure kubectl to connect to the cluster following this guide.

Posted on

MVC Web Application With ActiveJ

Intro

In this tutorial we will create an asynchronous servlet that adds contacts to a list, parses requests and processes form validation with the help of ActiveJ framework. You can find the source code of this tutorial on GitHub.

Setting up the Project

We'll need the following dependencies:

Posted on

Apache Ignite AWS basics

Introduction

Cloud computing is on the rise for a couple of reasons: it is flexible, relatively cheap compared to supporting in-house infrastructure, and it allows excellent automation of resource allocation, which cuts costs even more.

Cloud computing also allows horizontal scalability, which is crucial for many businesses in today’s digital age. When the amount of data to be processed grows year-to-year, one cannot rely on old-fashioned vertical scalability models. In this era of distributed computing, data should be spread across multiple cheaper systems, where data can be stored reliably, processed, and returned to the user when needed.

Posted on

How to Explore Databases Visually With Relational Data Browse

How to Explore Databases Visually

Relational databases are used when a project store structured data and has a fixed schema.
They can handle a lot of complex queries, database transactions and routine analysis of data. Relational databases make data browsing very accessible, but even so, they still require complex SQL Queries. This can be time-consuming, especially for a beginner in SQL syntax.

Relational Data Browse, a feature integrated by DbSchema, is an optimal solution to this problem. In this tutorial, we’ll go over the functionality of this feature.

Posted on

A Brief Introduction to Closures and Lexical Scoping in JavaScript

“Writing in ECMAScript language without understanding closure is like writing Java without understanding classes” — Douglas Crockford, father of JSON.

In this piece, we are going to discuss closures and lexical scoping in JavaScript. Understanding closures leads to a better understanding of programming itself. If you are planning on becoming a professional programmer, questions regarding closures and their applications are widely asked during technical interviews and can be really helpful to you.