Dec 12, 2021Java Series: FlatmapJava 8 was a great step forward toward modern programing language. One of the key features added in this release was Java streams. It provides lots of convenient operations for data processing. One of them is a flatMap() used very widely to unwrap and merge multiple collections into one. This…Java6 min readJava6 min read
Sep 30, 2021How to set up monitoring tools for Java applicationIn this blog post I’ll show how to set up two monitoring tools that are widely used for Java applications — Java Flight Recorder with JDK Mission Control and Prometheus with Grafana. When your application reaches a state when it’s production ready it’s a good time to celebrate. Soon users…Java15 min readJava15 min read
Sep 21, 2021Automating quality checks for Kubernetes YAMLsIf you have ever wondered how to make sure that your YAML Kubernetes objects are defined correctly and are following industry best practices, this blog post is for you. …Kubernetes11 min readKubernetes11 min read
Mar 22, 2021Step-by-step guide how integrate Keycloak with Angular applicationIf you’re building a large enterprise application or a one that is publicly available you may want to introduce a concept of users, so that they will be able login to their accounts, put their information and do some stuff with your app, if they’re allowed to. With this blog…Keycloak13 min readKeycloak13 min read
Mar 15, 2021Implementing OAuth 2.0 access token validation with Spring SecurityWould you like to know some basic concepts of Spring Security that can be implemented in a modern, micorservice application? If so this article is for you! In it I’ll guide you how to add step-by-step OAuth 2.0 access token validation to REST API endpoints of your Spring Boot application. …Security19 min readSecurity19 min read
Mar 8, 2021Create and configure Keycloak OAuth 2.0 authorization serverIf you want to know how to set up and configure Keycloak as an authorization server (for OAuth 2.0 framework) with Docker this article is for you. This blog post is a second part of my series on OAuth 2.0 framework. In previous article I’ve briefly described what OAuth 2.0…Oauth211 min readOauth211 min read
Published inNerd For Tech·Mar 1, 2021Introduction to OAuth 2.0Authorization framework — OAuth 2.0 — is a very popular nowadays. With this blog post I try to explain how it works and its basic concepts so in following article I could show how to implement it in a full stack app. Love it or hate it. No matter how…Keycloak16 min readKeycloak16 min read
Published inThe Startup·Oct 23, 2020Make Testing Fun (Again) With Spock FrameworkThis blog post is all about introduction to another, very popular test framework used in Java ecosystem. I would like to share with you how combination of almost natural Groovy language and cool Spock test framework could bring joy while writing tests. Writing tests might be hard. There are several…Java11 min readJava11 min read
Aug 28, 2020Introduction to Kubernetes: what problems does it solve?Nowadays Kubernetes is one of the most popular tool which is used to build large, distributed system in the cloud. Many companies decide to use it in their new projects or are migrating already existing one. …Software Engineering17 min readSoftware Engineering17 min read
Published inThe Startup·Jun 20, 2020Publish your Cypress Test Report with GitHub ActionsEver wonder how to prepare nice looking test execution report with videos in Cypress? If so this blog post is for you! I will explain how to step-by-step configure Cypress project to generate beautiful HTML report and how to automatically publish it on GitHub Pages using GitHub Actions. Cypress is…Programming8 min readProgramming8 min read
