Coding

A little tool for a small city Here we are!! I recently moved to Germany to join the adidas - platform engineering team. This is a really small piece of GOde (:P) I wrote for Erlangen (my new place) citizens ^^ Needs You will only need an https://www.internationalshowtimes.com/ movie api key. You can get one quite easily by going here Scope You would simply like to be informed about new OV movies on air in cinemas from your shell…here we go! The script in the repo provide you a draft to start from ^^ ...

Introduction I recently started interesting about the concept of streaming - not videos, of course - mainly because in the last months I collected several sources to be used as starting point: so, waiting for my Google Home Mini to be shipped, I decided to mix togheter two words I often see surfing the Web. The first is Kafka - that is a distributed streaming platform (ok but what exactly does that mean - for real? Be patience, I will try to introduce the tool in this article) and the second is Blockchain (I don’t like this world, believe me or not I think it’s like Big Data, in the sense that everybody knows the principles but nobody wants to deal with the maths): this two concepts have kind of similarity, I guess 🧐 I have a problem with memory, so I first talk about how Kafka works just to remind me the key concepts for the next month, because I use to forget everything I learn - d***q. ...

Introduction I recently build a Slack command to help me handle actions on my VPC. The only thing you need is an AWS account - Free Tier it’s ok. I recently wrote about how to maximize resources, with particular focus on the number of hours you have in Free Tier - using specific CloudWatch Rules. In this article, I want to describe how I extended my architecture to invoke actions - potentially, all the action provided by Amazon Web Services official SDK(s) - with a single Slack command. I decided to call this slack command HAL because I think it’s a really dangerous command 😜 ...

Introduction If you have an AWS account in Free Tier, bla bla bla ok stop: I am a AWS Lambda maniac. I only wrote about them (here, here). In this article, I want to talk about my new purchase that is - of course - related to AWS Lambda: the AWS IoT Button. It first made its appearance on the IoT scene in October of 2015 at AWS re:Invent with the introduction of the AWS IoT service. That year all re:Invent attendees received the AWS IoT Button providing them the opportunity to get hands-on with AWS IoT. So cute. Since that time, AWS IoT button has been made broadly available to anyone interested in the clickable IoT device. Here it is! 😎😎😎 ...

Introduction If you have an AWS account in Free Tier, you have (updated: March, 13th 2018) 750 hours/month to run EC2 (small ones) in your VPC. You also have a lot of other resources, such as AWS Lambda functions (I wrote about them here and here) and CloudWatch Events. In this article, I talk about smart resources handling and some trick - actually, not so smart XD - I setup to take the best from the services. Attention!!! Picture Spoiler ...

Introduction Recently I worked with AWS Lambda and API Gateway to extend my set of personal APIs and collect information from several sources. I wrote an article on that (if you want to have a look). In this article I will talk about the AWS Step Functions service that enable create finite states machines to easy coordinate the components of distributed applications and microservices using visual workflows. Why AWS Step Functions? Because they let me create a tool to gather movie titles in teather, search for reviews about each of them and make a basic sentiment analysis over the review to help me decide what’s worth watching at teather and what’s worth waiting for on Netflix :D More in general, with AWS Step Functions, you can build applications made of individual components that each perform a discrete function: this lets you scale and change applications quickly. Step Functions is a reliable way to coordinate components and step through the functions of your application. They provides a graphical console to arrange and visualize the components of your application as a series of steps. This makes it simple to build and run multistep applications. Step Functions automatically triggers and tracks each step, and retries when there are errors, so your application executes in order and as expected. Step Functions logs the state of each step, so when things do go wrong, you can diagnose and debug problems quickly. ...

Introduction In this article I will talk about my experience with AWS Lambda + API Gateway, GoLang (of course) and Grafana to build a sentiment analysis tool over customizable topics. Who should you read this post? Don’t know, maybe a CIO, a CTO, a CEO, a generic Chief or a MasterChef, for sure an AWS and GoLang fan like me. First of all: to better understand how to use Elasticsearch, read my previous post Elasticsearch over My home Network Attached Storage: it’s not so exciting as it seems, but you will have a general idea about what is Elasticsearch and how can you use it. Second: if you don’t know about AWS Lambda, study it. I personally believe that it represents one of the most interesting services currently offered by AWS: as they state, AWS Lambda lets you run code without provisioning or managing servers. You pay only for the compute time you consume and there is no charge when your code is not running. The amazing thing is that with a Free Tier trial you have 1 milions requests for free - O.O - to run code of any type of application or backend service - all with zero administration: you just upload your code - unfortunately the online editor for GoLang is not supported yet - and AWS Lambda1 takes care of everything required to run and scale your code with high availability. You can even set up your code to automatically trigger from other AWS services - as I have done with API Gateway - or call it directly from any web or mobile app. And…last but definetly not the least, why I’m writing this post!? Because starting from 15 January 2018, AWS Lambda support GoLang!!! ...

Introduction In the last months, I worked a lot with GoLang on several projects. Although I’m certainly not an expert, there are several things that I really appreciate about this language: first, it has a clear and simple syntax, and more than once I noticed that the style of the Github developers is very close to the style used in old C programs. From a theoretical point of view, GoLang seems to take the best of all worlds: there is the power of high-level languages, made simple by clear rules - even if sometime they are a little bit binding - that can impose a solid logic to the code. There is the simplicity of the imperative style, made of primitive types with the size in bits in their name, but without the boredom of manipulating strings as array of characters. However, two really useful and interesting features in my opinion are the goroutine and the channels. ...

Introduction I always owned a lot of hard drives: I don’t know why, I always used and still use to look for space to save my data. In the years, I started using disks, then I assembled a HP Proliant to be a Synology Based System - I don’t want to go the cloud because I’m stupid - and… in the last week, I decided to make order in a huge amount of files. The first thing you have to do when you are handling terabytes and terabytes of both well-ordered and no-ordered-at-all data is literaly pray that someone else, like a magician, or druid comes to you with a magic wand and fixes all the mess for free, in a way you do not know but you will like. This article is the right one if you don’t want to pray, you really don’t believe in miracle but you still need to order your stuff. I have done it using elastisearch and kibana! ...

A beautiful childhood I’ve never been a fan of videogames, neither as a child nor today: do not get me wrong, as many guys of my generation I also owned and played with the legendary PlayStation 1 (1995)1 and PlayStation 22 by Sony and the Nintendo Game Boy3. It was fun, but not so much as playing to videogames born a few years before I was born. In the 80s, there were not yet the powerful graphics chips that today can be found with a few hundred euros. How did the videogames work? It’s simple: without graphics. There were many textual games and in my opinion, for many vintage lovers, they would still be cool today. My generation has lost this advantage of literaly building with fantasy the world around a game. So, some days ago I found my self thinking back to Sheldoon Cooper that plays with the game Dungeon in the Big Bang Theory4, or to the kids of Stranger Things by Netflix, or to my father, to whom I gave an original Playstation 1 with the first TombRaider(s), and I asked myself how it would be possible today to play again one of those text games that were so popular in that decade…to the point of deciding to create one of my own. ...