This post covers all steps that are required to setup a Continuous Integration (CI) build pipeline using Travis CI as a main driver for deploying our Play application written in Scala to Heroku cloud. Expected end result: After each commit to the master branch of my Github project, I’d like to run full test suite. Following that, each successful build, should trigger a deployment to Heroku. If the tests fail, application should not be deployed.
This is a followup post to my previous one covering JSON in Play framework. I’d like to show how the manual work I did before in trying to make JSON mapping compatible with external API can be done by using 2 small but useful libraries: [play-json-naming](https://github.com/tototoshi/play-json-naming) [play-json-extensions](https://github.com/xdotai/play-json-extensions) play-json-naming This is a very simple library that can be used to convert from camelCase formatting (the default one that we use in Scala) to snake_case formatting that is common in various different languages (for example PHP or Ruby).
I’ll show 2 slightly advanced techniques for working with JSON in Play Framework (play-json) that are useful especially when you need to control the mappings yourself. For example when you have to make sure that your API is compatible with existing applications. The examples are based on my project Game Arena (which is in very early stages of development) One suggestion, before we start, take a look at Play Framework JSON documentation which is truly quite comprehensive and provides a very good introduction to JSON usage in Play.
After my previous post which was received quite nicely, I wanted to write a little bit more about the topic of designing Typesafe Domain objects, this time I’ll focus on the problem of how to model a deck of cards in Scala. I’ll go over 2 different approaches you might take when designing a solution to the problem of card games in Scala. I’ll try to show how this can be done with Case Classes (Sealed Case Objects) and Enumerations.
In this blog post I intent to give a brief overview of “Daj się poznać” competition and some reasoning why I decided to join it. Few words about “Daj Się Poznać” “Daj się poznać” (in English: “Let yourself known”) is a competition aimed at Polish programming community and it’s idea is to help programmers to be more involved in both blogging and open source work. Currently it’s aimed only at the polish market, so all content on the official website is in Polish, most of the participants are blogging in Polish, only few in English.