Piotr Jurewicz

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I am a full-stack business developer from Poland with a strong interest in DDD. My leading technology is Ruby on Rails.

Contact me at: piotr.jurewicz(you-know-what)rubywizards.com

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Overgrown Tenant class decomposition

Jan 11, 20222 min read

If you have been working on a multi-tenant application for a long time, there is a high chance that your Tenant model has grown to an enormous size. You probably started with id, name, and subdomain columns. Later there were things that had to be con...

3 ways to make big numbers readable in Ruby

Nov 10, 20211 min read

Today, I came across the following method in my old code. (This comes from an application supporting calculations in the construction of concrete floors). def l_factor ((bending_stiffness * 10000000000) / k) ** 0.25 end This big number looks ...

As simple as... the Inventory bounded context

Aug 31, 20212 min read

Last weekend I went to the dynamIT conference that took place in Kraków. In his presentation, Andrzej Krzywda was speaking about DDD as Low-Code. He distilled 11 bounded contexts that are common in the different business applications. One of them is ...

Accessing Cloudfront stream with VideoJS and server-side signed cookies

Apr 23, 20212 min read

Today's post is a continuation of what I wrote yesterday about securing Cloudfront stream with signed cookie. I encourage you to open this post especially to look at the UML diagram. There are some things you need to keep in mind to access a stream ...

Securing Amazon Cloudfront stream with signed cookies

Apr 22, 20212 min read

In one of my recent posts I described the challenges I faced while building the audiobook streaming platform. One of them was securing access to the Cloudfront stream. There are two ways of securing content that CloudFront delivers: signed URLs and ...

How do I use ActiveJob to track the progress of long-running remote tasks?

Apr 21, 20212 min read

Yesterday I wrote a post about initializing AWS Elemental MediaConvert job. It's a common case that you initiate a task and have to wait some unspecified time for the result. All what you have is an external system job id. In such cases, I use a ve...