Custom Envoy xDS server in Golang with Cluster Subsets

Mon, Aug 24, 2020

At work (at Q42, check it out) we started using Envoy for some use cases. Envoy is a very customizable proxy. Think of it as something like NGINX, but with more dynamic configuration possibilities (NGINX Plus probably also has these, but that is behind a paywall). In this post I’ll explore how you can dynamically configure it, via its control plane API called “xDS”.

Play Framework FormMapping in modern front-end frameworks

Fri, Nov 11, 2016 One of the celebrated features of Play (at least for me) are the built-in form validation and the JSON parsers and combinators. While the team behind Play wants everything to be reactive, they have not build in support to become reactive on the front-end too: Play supports classical HTTP requests and form posts, but the defined form validation is not easily available in say, JavaScript. Looking at all the work done to expose the Routes to JavaScript makes me wonder why no-one made the validation available too.

Browserify browserified libraries

Mon, Oct 10, 2016 Browserify does not like to eat his own output. When creating a npm library that is browserified make sure to derequire/minify the output so it can be reused in other projects without mystical ‘Cannot find module X’ errors where X is some file you know nothing about. Possible fixes found in the wild: Setting noParse for bundle A in the bundle B operation; or Running the standalone bundle through derequire; or Minifying the bundle Summary,

RxSwift.Lifecycle

Thu, Aug 25, 2016 Once in a while I’m reminded that good API design is of vital importance. Today was such a day. Everybody developing for either Android or iOS platforms knows that one often needs to run something when the view is loaded or when it will appear. Both platforms provide nifty ‘callbacks’ for this: It is good practice to start listeners onStart and cleaning up onStop (or other equal pairs). This is all good, and if we want to share functionality we simply create a subclass of UIViewController or Activity and we put the shared logic there.