Update 20170906: This article was written for Phoenix 1.2. Is not going to work with 1.3 without some minimal changes, but the ideas should work just the same if you still want to try it. I'll try to set apart some time to update it to Phoenix 1.3, but no promises. Sorry for the inconvenience and confusion. This is a minimal working Phoenix app that shows how to stream videos using the Phoenix Fra
Thank ElixirConf for giving me another chance to make a presentation at ElixirConf US 2019: This presentation will be conducted by me and Mr. Hisae, who is a graduate student in my laboratory and a co-author of Hastega. He's a great meta-programmer because he wrote a new feature of Hastega only one night! Look forward to an announcement on it at ElixirConf US 2019! BTW, development of Hastega has
AtomVM is a tiny portable virtual machine that allows BEAM code to run on microcontrollers with less than 500KB of RAM such as the ESP32. Disclaimer: AtomVM is not production ready yet, it might set your house on fire. So what does it mean? In few words you can flash AtomVM on an ESP32 and get your Elixir/Erlang code running on it. WhyI work full time on Astarte, which is an open source IoT platfo
Distributed transactions are hard and expensive, if you wonder how to pragmatically handle them in a mid-size project— this article is for you. We will discuss how can we use the Sagas pattern to run a distributed transaction from Elixir on examples that leverage Sage package. As a bonus, you will see how to use Sagas to organize your domain contexts. What problem are we trying to solve?Most proje
Do you have an Erlang VM that you don’t need anymore and you don’t know what to do with it? Worry not, my friend, this is just the list for you! Fasten your seatbelt and get into your old fridges… we’re going to crash and blow things up! The GoodThere are several ways to shutdown an Erlang VM nicely… 1. q/0, c:q/0, init:stop/0The simplest and cleanest one is to just use q/0 or c:q/0 (which are, ac
Elixir EventBus is a library that allows different modules to communicate with each other without knowing about each other. A module/function can create an Event struct, and deliver to the EventBus without knowing which modules will consume. Modules can also listen to events on the EventBus, without knowing who sent the events. Thus, modules can communicate without depending on each other. Moreove
Fault tolerance is one of the most often mentioned reasons for using Elixir. And this is true — being fault tolerant was probably the most important driving force behind Erlang. During the years, a lot of amazing stuff has been already written on dealing with failures in Erlang (Elixir) and OTP. Yet, in my opinion, most of the resources describe fairly advanced language features and are not really
Photo by Katherine Hanlon on UnsplashMotiveI started working with Elixir a few months back but never fully delved deep into the language’s intricacies. Elixir is a fairly recent language which runs on BEAM, the same VM which runs Erlang. So it inherits all the properties which make Erlang great like fault tolerance, high availability and distributed computing. The only barrier to entry in Erlang f
Disclaimer: This is a copy/paste of the ReadMe here: https://github.com/pdgonzalez872/nerves_rpi3_wifi_picam. Working code is there if needed, but I suggest you code along and go through the steps. Introduction:A friend of mine asked me about a remote device to monitor a physical machine in a production line. We discussed about it being able to gather some data about the performance of the machine
“Red and black beetle climbs on purple plants in the wild” by Mahdi Shakhesi on Unsplash Much has been said about Elixir debugging techniques, but in this post, I’d like to give a quick overview of all possible options to serve as a go-to reference when you need to debug Elixir code. Enough talking, let’s check each of them: IO.inspectThe simplest technique: IO.inspect to printIO.inspect/2can also
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