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Cassandra Scheme Update In the world of RDBMS when we have a database with a scheme we have the issue of how to manage changes in the scheme. When updating our product, we also need the option to update our database scheme. For this we have tools like liquibase and...

by matanw
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Following my Vanilla redux workshop, I’d like to share the slides with you (video will be available here soon). The Redux state managment library is often mistaken to be used with react only.  In this hands-on workshop I will show some examples of usage with native javascript only, as well...

by hagzag
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Problem Developing infrastructure as code requires downloading 100's of Mbytes and some time Gigabytes of data just to get going. Solution Run a local cache of all the packages you need for development (especially when you are building a multi-platform solution). The cool thing here is that with under a...

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From Monolithic to Microservice in practice From Monolithic to Microservice in practice This blog will help you to migrate your monolithic application to microservices (see Martin Fowler – Microservices) in small steps. The end goal is to have each service totally decoupled from any other service. This means that the...

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MDC - Stack Logback has a very nice feature called Mapped Diagnostic Context (MDC in short). According to the manual what it does is: "It lets the developer place information in a diagnostic context that can be subsequently retrieved by certain logback components" This is very useful for adding additional...

by orenk
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I was recently consulting a client. Long garbage collections cycles triggered the client failover to switch server, since the server was idle for too long. My task was to improve the garbage collection. The tuning task took several iterations, in each step there was something new to learn. There are...

by Royb
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In every programmer’s life comes a time where they need to know if words from a defined set of words appear in input texts. Today, we’ll see how to do it using a naïve solution, and efficiently using Aho-Corasick algorithm. Real world usage I recently used Aho-Corasick algorithm myself. I...

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In my previous blog Building Java application over AWS Cloudformation I gave an overview of how I build my cloud formation for my application. As mentioned in the article a lot of the logic was coded with the userdata of cloud formation. What I found was that Amazon will start...

by danh
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Calling the ansible setup module in a task is bad for you.... So I was wondering around my code trying to figure out why the Hell is Ansible deciding for me to stay sudo after I am explicitly telling him I want to be regular user. I mean really, I...

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Why I believe in web components After years of hacking out React, Angular, JQuery and other popular javascript libraries, I realized that they all suffer from the lack of freedom. Whenever I need to break out from the set of rules, I need to start hacking out my way through...