Archives: cloud

Solutions for a filterable sortable pageable list in Spring

(GraphQL, REST, …) Hello again everybody, it’s S√ľxy here!¬†¬†Today we are going to take a look at several custom implementations for the good old “filterable + sortable + pageable list” problem. In this post we are going to compare the oldschool REST solution with GraphQL¬†and our custom solution (both at the source code level¬†and performance), […]

FCrDNS (Forward-Confirmed Reverse DNS) on Firebase

TL;DR Around¬†January 2018¬†I had been trying hard to make FCrDNS on Firebase work…¬†However, after countless hours of hopeless development, I felt like something was wrong, so I asked for help on¬†Stackoverflow.¬†Doug Stevenson¬†and¬†Thomas Bouldin, two developers from the Google Development Team came to my rescue and kudos for their quick response! At that time they confirmed […]

Rancher and Grafana – A long case-study to learn some DevOps

Motivation Cryptotrading is so cool and profitable these days… So I decided to try it out. But if you want to do something well, you need a lot of information and tools. I wanted some visualization, with chat (Slack) integration, and some alerting tools/bots. This post will describe the tools I found and started playing […]

Awesome Spring Specification How-to

Introduction Okay so we made a filterable + sortable + pageable list before with Spring + Couchbase (you can read more about it¬†here¬†and¬†here, I totally recommend you read those posts, cuz I’ll refer to them in this one). Actually filters are meant to be in an AND relation between the parameters (most of the cases). […]

Push Notifications – a bigger picture

Many applications we create require the ability to send push notifications. Sometimes we are the ones who made the client and the backend side as well. The available tutorials are helpful but not always entirely clear; we met quite a few challenges. Let‚Äôs look at a specific example. –¬†¬†¬†¬†¬†¬†¬†¬†¬† We‚Äôd like to send a¬†push¬†notification from […]

How to make a custom Username Password Authentication Filter with Spring Security

¬† Introduction Basically I’ll show you how to use¬†Spring Security¬†and how to customize it if you want. First we’ll implement the basic authentication with basic responses and other stuff, and I’ll show you how to customize the login and logout process as you wish¬† ¬† Simple Authentication After you added the required dependencies described on¬†Spring’s […]

Ray Tracing with Akka – Part 4

Where did we stop last time? Read the¬†first part¬†of this series for an intorduction to ray tracing and what I wanted to achieve. Here we created a sphere and a shadow. Read¬†part two¬†for a discussion on creating a plane and letting our objects reflect and refract.¬†Part three¬†has been the most advanced, in here we built […]

Easy open source licenses

A simple description of open source licences so you’ll know how to use them The Open Source Community and Licenses The open source community creates and uses free software. A copyright ensures that the author possesses exclusive rights to their product.¬†With a licence the¬†copyright¬†holder provides the rights to study, change, and distribute the software to […]