I'm a vociferous supporter of integration tests with an embedded servlet container and in this post I'll show how to get test coverage for the classes touched in those integration tests. All test coverage gauging tools I know instrument code under test either at build time or run time through Java agents. Because the code … Continue reading Getting test coverage reports for integration test
Author: george georgovassilis
Code reusability: from classes to containers
What is the right code granularity? I have previously written about reusing functionality [1] in the micro service context and found then that the old aim to optimise code footprint is a metric in need of a good overhaul. Ever since I'm happy that the idea is getting traction:Classes, libraries, applications OOP reuses code and … Continue reading Code reusability: from classes to containers
Unjam CSS
Abstract: Unjam CSS is a technique for removing render-blocking CSS from pages over which we have only partial control, such as CMS or portals. The problem: a portal generates HTML pages based on a template. Custom HTML can be inserted at specific place holders, but we can't modify the rest of the page HTML. The … Continue reading Unjam CSS
2016 feed reader shortlist
One of the greatest interview questions I have been asked to date was "where do you get your news from"; I'm immensely grateful when authors I enjoy reading divulge their sources of information and inspiration. So without further ado I present to you: George's 2016 feed reader shortlist.Information TechnologyJohn D. Cook's blog is about applied … Continue reading 2016 feed reader shortlist
Equal height HTML elements in a container with CSS
Task: create HTML elements that contain other elements and adjust their height to surrounding container. No Javascript allowed.That's surprisingly hard; height:100% won't work; elements generally wrap their contents tightly and don't extend to their parents height dimension.Illustrating the problem: three elements inside a surrounding containerCss-tricks lists several ways [1] to get this done, two of … Continue reading Equal height HTML elements in a container with CSS
January blog updates
January 2017 changelog: new responsive template new domain blog.georgovassilis.com (old domain redirects) https only using cloudflare for smoother delivery switched back to blogger comments from g+ comments
RSA is partially cryptographically homomorphic
Homomorphic cryptography [1], should it ever become available as a product, will have an intriguing property: computers will be able to operate on encrypted data without either having to- or being able to decrypt it. Competitive or regulatory pressure leads many organisations to distrust public (or private) clouds with their data and algorithms, so they … Continue reading RSA is partially cryptographically homomorphic
Rebuilding single services in docker-compose
Note to self: a single service ("container") out of a docker-compose.yaml file is rebuilt and restarted like this: docker-compose build docker-compose up -d # runs containers, but returns immediately # Oops, something needs to be changed docker-compose stop web # Make changes docker-compose build web docker-compose up -d --no-recreate web As Daniel Nephin writes here: … Continue reading Rebuilding single services in docker-compose
Scalability through client-driven workflows
This post discusses a way to increase a service architecture's scalability by removing any communication paths between services and instead burdening clients with that communication.Bureaucracy in real life is a trade-off between ease of work for the applicant vs. ease of work for officers In "Les 12 travaux d'Astérix" [1], Asterix and Obelix are on … Continue reading Scalability through client-driven workflows
Of Babylonian kings or why technical users in user stories are OK
Every time a technical system impersonates a human in a user story, God drowns a kitten in an agile waterfall.-- Unknown User stories are supposed to advocate the user's view on a system's behaviour. Whatever technical systems which interface with "our" system think or do does not interest us. But why then is it so … Continue reading Of Babylonian kings or why technical users in user stories are OK
