APIs have become more and more popular due to increasing demand for development of mobile and single page apps, and so the need of sessionless server-side applications, being those that are token-based the most popular ones now days due to their relative easy implementation. Here you have a great example that uses JWT to secure a microservice-based application.
JWT (or jot) stands for JSON Web Token and as it states it is a web token structured in a JSON format. JWTs are composed of 3 parts: the header, the payload, and the signature. In short, the header contains the type of token and the algorithm for the cryptographic signing; the payload (or claim) contains the information wanted to securely send to...
Recently at Tangosource I was assigned to work on an internal project named Dev Jobs (see dev jobs on iOS and dev jobs on Android), where I had the chance to work next to great teammates and implement a microservice architecture with Ruby on Rails, nodeJS, JWT, Ionic, Docker, and several testing tools, including RSpec, Mocha, Frisby, and Protractor. In this first post, I’ll explain the basics of the microservice architecture.
What is a Microservice Architecture ?
Martin Fowler gives a great definition.
"The microservice architectural style is an approach to developing a single application as a suite of small services, each running in its own process and communicating with lightweight mechanisms, often an HTTP resource API. These services are built...
Back when software was developed in Fortran and C, you needed a lot of knowledge to write anything of significance. Originally, Fortran lacked even the concept of a data structure . In the 1990s, an array was a contiguous chunk of memory containing a fixed number of structs or of pointers. Alternatively, one could create a struct where one field was a pointer to the next struct in the array, a true linked list. You had to write all the code that manipulated anything. You had to decide if an array or a linked list was best for each situation. You had to decide if you were gonna use Quick Sort or needed a Heap Sort or if a...
Curious about senior recruiting and communities? Here's a talk I did at Hirepalooza 2015. Here are the Hirepalooza 2015 slides, which might help, given a couple jumps in the video. This is the description from the talk:
Even if you have a limited budget you still need to recruit tech talent. Join Eric Siegfried, CEO of TangoSource as he talks about how to find and hire the most critical technical talent on your team-- even when you have close to no budget. From this session you'll learn how to build and leverage an ecosystem, relate more to senior talent, and raise the level of your team.
Some people underestimate sprint retrospective meetings and think of it as simply the time when a sprint ends and they can move on to what’s coming next week. But in reality, this meeting provides an opportunity for the team to identify relevant action items to improve their performance. This is the moment where the team can meet and examine each other’s performance for the sake of the project. It’s also an opportunity to update and improve the team’s definition of done.
There are many ways to lead a retrospective meeting. I’ll share with you what has worked for us.
At the beginning of each meeting
Make the purpose of the meeting clear for everyone. If this is the team’s first retrospective meeting,...
Even though we are a Rails development team, we use WordPress for our blog. We love Rails, but WordPress provides a robust solution for our blogging needs. And lately, we have been experimenting with Docker + Wordpress.
So, why Docker?
There are quite a few straightforward reasons why we use Docker with Wordpress, namely:
Docker reduces clutter.
We can run a couple of Rails applications and WordPress instances on the same server.
It helps with version conflict management in Rails apps
It allows for the duplication of a production server into staging for testing purposes.
We can “dockerize” an application, run it in our laptops, run tests and then deploy with confidence that it will work. If you are new to Docker, you should read What is Docker and Dockerizing applications. So,...
Not so long ago a customer requested that we provide the highest server reliability that we could. The application was pretty big, with about seven servers per environment. We needed to increase reliability in web servers and databases. In this article, I'll explain how we achieved that from the database side.
While searching for options, we found that MongoDB (which was the database engine we were using) offered several options that increase your database reliability, i.e.:
MongoDB - Sharding
MongoDB - Replication
We went for MongoDB Replication –also known as Replica Set– because our customer needed a solution ASAP, and the configuration needed is minimal. Besides, it offers whole database replication, which we needed to implement other security measures, like backups.
Enough context for now, so let’s...
Have you seen a team that doesn't understand the reason behind developing certain feature? Have you had a sprint review where more than a half of the features are rejected? Or that the team develops a huge feature that doesn't add any significant value to the product? If you've seen this in your project, it might mean that your Product Owner is doing something wrong.
We can consider the Product Owner to be the main stakeholder. She should own the product and determine direction. The reality is that the Product Owner role is different from that of a project manager, since she has the passion, the vision, and, unlike a project manager, has to say no to people. Let me explain.
When we start working with Angular, we come to this question very quickly: how can we set our controllers to communicate with each other? Which option is the best?
It is typically assumed that in Angular.js there should be only one controller per view. Sometimes, however, we have no choice but to have two controllers within the same page, and they will need to interact with each...