This is a kata on ports and adapters architecture. The task is to retrieve a list of weather observations on Iceland from the following API:
http://apis.is/weather/observations/en?stations=
and output the result into a CSV file of the following format:
id,name,date,time,temperature,pressure,wind_direction (optional)
The API documentation can be found here: http://docs.apis.is/#endpoint-weather
The goal is not to get this done as quickly as possible, but to follow the rules of (http://alistair.cockburn.us/Hexagonal+architecture)[ports and adapters architecture]:
- The application itself does not depend directly on any external systems, but only on ports
- The protocol for a port is given by the purpose of the conversation it describes
- For each external system there is an ‘’adapter’’ that converts the API definition to the format needed by that system and vice versa
Now have some fun!