Category: cloud

Integrating Open Policy Agent with Spring Security Reactive and JSON Web Tokens

February 5, 2021

We present a Java library that simplifies adopting the Open Policy Agent server to manage user authorization for a Spring Boot microservice, while also managing API Token (JWT) authentication. Motivation Spring Security assumes a fairly simplistic Role-Based access control (RBAC) where the service authenticates the user (via some credentials, typically username/password) and returns a UserDetails … More Integrating Open Policy Agent with Spring Security Reactive and JSON Web Tokens

Gossip-based Failure Detectors – 0.8.0 released

September 8, 2017

We have just released version 0.8.0 of our distlib C++ library that implements a number of popular distributed systems algorithms. This concludes a first iteration of the “SWIM Gossip Protocol” for failure detection: the implementation is now fully thread-safe and can scale up to many servers with minimal process overhead. The gossip_example.cpp toy server shows how a client … More Gossip-based Failure Detectors – 0.8.0 released

A python notebook to experiment with the Apache Mesos HTTP API – Part 3 of 3

September 3, 2016

This is the third and final part of a three-part series: Part 1 describes the required setup and how to get Apache Mesos Master and Agent running in two Vagrant VMs; Part 2 shows how to connect to the HTTP API and accept resource offers. This series is an extended (and updated) version of the … More A python notebook to experiment with the Apache Mesos HTTP API – Part 3 of 3

A python notebook to experiment with the Apache Mesos HTTP API – Part 2 of 3

September 2, 2016

This is the second part of a three-part series: Part 1 describes the required setup and how to get Apache Mesos Master and Agent running in two Vagrant VMs This series is an extended (and updated) version of the talk I gave at MesosCon Europe 2015 updated for Apache Mesos 1.0.0, which has just been … More A python notebook to experiment with the Apache Mesos HTTP API – Part 2 of 3

REST-based User Management web service in Scala

September 29, 2014

Today I’ve opened access to my sentinel repo which is still at a very early stage development, but I thought was worth sharing with others. I’ve been using Scala on and off for the past couple of years, since I’ve completed the Coursera Scala course (passed with 95% and distinction, obviously!); however, to really learn a language (and … More REST-based User Management web service in Scala

From null to a hundred in six months

February 3, 2014

Or how to achieve bi-weekly releases at SaaS scale Background Almost exactly a year ago I joined RiverMeadow: a self-described “cloud mobility” SaaS platform, with the modest task of improving a product I was told was “ready for market” and a team that only needed “some improvement, and a better adoption of Engineering best practices” – in slightly … More From null to a hundred in six months