Python Pickling in the cloud (or how to get python to execute code it hasn’t seen yet)

Problem - What are we trying to solve? Let's assume you have the beginnings of a simple distributed system: You use redis as your event queueYou have a "master" python script that pickles a python class, and sends it to your redis queueYou have a "worker" python script that waits for a new event, unpickles … Continue reading Python Pickling in the cloud (or how to get python to execute code it hasn’t seen yet)

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Reactive Spring: Webflux Multipart File Upload

A clear, simple example of multipart file upload using Reactive Spring Spring Boot v2.0.3.RELEASE Coding using reactive functional style (as opposed to annotation-based) Spring Initializr Dependencies: "Reactive Web" Language: Kotlin Notes follow after the code: https://gist.github.com/dvas0004/fdb63086cd77869066e83a1ca25757d9 Notes: Spring Webflux makes it extremely easy to build reactive web services - but it takes a while to … Continue reading Reactive Spring: Webflux Multipart File Upload

Drill Down into Spring Boot Actuator metrics

We've only seen this very useful feature documented in the official Spring Actuator API Documentation, so maybe not many are aware that you actually have some control over what the Spring Actuator metrics return to your requesting client. The Spring Actuator API allows you to expose several useful metrics that you can use to monitor … Continue reading Drill Down into Spring Boot Actuator metrics

Google Yolo and Spring Boot 2.0 Authentication

Back in 2016, Google announced the "Open Yolo" project: You Only Login Once. It originally seemed to be an Android library but during Google's last Dev Summit in October 2017, Google released "One-tap Sign-ups On Websites and API Integrations" which brings Google Yolo to your website via JavaScript goodness. There's a very easy guide that … Continue reading Google Yolo and Spring Boot 2.0 Authentication

BLE Health Devices: First Steps with Android

Bluetooth Low Energy (also known as Bluetooth v4) is the current standard in Bluetooth Technology. It is particularly interesting to me when applied to healthcare devices, for a number of reasons: No pairing necessary. These healthcare devices are normally handled by carers or vulnerable people who do not want to go through the hassle of … Continue reading BLE Health Devices: First Steps with Android

Nugget Post: Golang HTML Templates

Golang authors have an excellent article on how to build a wiki web application entirely out of go. Towards the middle of the article, they mention the html/template package. For those of you familiar with templating systems like jade, handlebars, or flask/jinja... you should feel right at home. In golang, templating needs no third party frameworks, no … Continue reading Nugget Post: Golang HTML Templates

Nugget Post: Golang: RPC server/client implementation

As part of my efforts to learn golang, I attempted to write a simple RPC server / client implementation. Between gobs (see my previous post) and the RPC implementation, golang makes it very easy to build a distributed system where servers and client share not only data via gobs, but also methods and functions via … Continue reading Nugget Post: Golang: RPC server/client implementation