Skip to main content

Creating something concrete with Scala

Since I attended a course on functional programming with Scala at Coursera (see previous posts) I've been having a idea to make something concrete with Scala. Having only minimal experience with Scala I decided to try something simple with well known Scala libraries.

The project


First I'll try to create a simple todo application that saves all the data to a some database (maria, redis, mongo) and the tasks are managed via REST-service.

Once I've done that I have two ideas what to do after that. I'll either try to create some sort of UI that uses the REST-service or I'll extend the simple todo application to a Kanban board type of application and try to create the UI after that.

I haven't decided with what I'll be creating the UI since I'm not that familiar with current frontend technologies so that'll be decided later.

First try


At first I tried to create a REST-service with spray but that didn't work. Maybe it's just me but to me the spray documentation was incomplete, I also tried out sprays examples from github and had them running via sbt but not with Scala IDE. The examples ran with sbt but when I tried to create my own REST implementation based on the examples the service never responded. Trying to make this simple service to respond to me with no luck for several hours I decided that I'm not going to use spray.

Second try


This is still on my todo list but next I'll try create the REST-service with Play 2 hopefully with better results.

Impressions now


Trying to create something with a new language and new libraries can be difficult and in case of Scala and spray it seems to be true. Though this isn't true to all languages, I remember a project where we created a REST-service with Grails with absolutely no experience with Groovy or Grails and that was a walk in the park compared to my experiences so far with Scala and spray.

Comments

Popular posts from this blog

Automated browser testing in 2018

Every now and then I do some research on browser testing. More specifically I try to find and evaluate what kind of ready to use solutions or libraries have emerged since my previous research or if some of the previously tested solutions has come up with something new.

Back in September 2017 I had some extra time on my hands and I used a couple of days to see what are the new and interesting solutions at that time. I came across some tools that I have used in the past and found two new interesting options in which one stood out.

Say hello to TestCafe
The most interesting solution that I found was called TestCafe. It's a open source Node.js library from a company called Developer Express Inc. They also have a commercial product called TestCafe (confusing) which I haven't tried as the open source library provided everything I was interested in and it seemed to be under active development.

The thing that caught my interest at first was that this library doesn't depend on WebDri…

Studying and developing as software development professional

As everybody in software development knows, or should know, that studying and experimenting is something one must do to stay on top of the game. That said this time I'm writing about my experiences and ideas of studying. In this post I'll be covering different methods of studying and how I feel about them and what other types of resources are available.

Reading a book Reading a book is probably the most traditional way of studying and I do read a few books every year. To me this is a way to learn theory and principles of something but usually little to nothing to do with the actual implementation. This type book I usually read in a week or two and I like these books when their length is reasonable somewhere between 50 and 250 pages.
Reading a book with exercises These are very common type of books in software development. These usually cover some theory and the exercises bring a pragramatic approach with what one can learn a basic implementation. Some of these books are good i…

DIY home automation v1

For years I've been interested in home automation. I've had remote controllable outlets from a few different manufacturers but I've never been quite satisfied with just the remote. What if I could control my outlets within my local network from any device, now that's something I wanted to have.

Controlling outlets from computer A few years back I bought a three pack of remote controllable nexa outlets. A while ago I discovered that another company manufactured a control unit that's plugged in to a USB port and best of all they provided linux software for it.

To make full use of these I'd need a computer that's always on and that's where I could make use of Raspberry Pi.

Setting up outlets
I had already set up my outlets with the remote that came in the retail pack just follow the manufacturer instructions.
It might be possible to configure the outlets completely via the software at least for some brands but I haven't tried it so I can't be sure.…