#HTTP API for a small weather forecast application serving the purpose of the analysing average #day/night temperatures and pressure.

####General info The application lets:

• get the full list of cities as per counties (to avoid mistakes) via http://localhost:8080/api/v1/weather/cities. Since such a list is a huge one, the app makes use of Spring caching.

• get analytics for day/night temperatures and pressure for the last config.last-days days (see application.yml) by http://localhost:8080/api/v1/weather/averages/{cityCountryName}. For instance, cityCountryName is London,GB. You can get a proper value by means of the previous endpoint.

While getting analytics, the app verifies that cityCountryName is in the full list of cities as per counties in order to reduce additional workload on a downstream service that has some limitations on the number of the requests. Such a verification employs Spring caching as well to reduce a further request time execution. On top of that, a getting analytics endpoint leverages Spring caching by a cityCountryName and a threshold (a moment of time from now to now plus config.last-days).
As an expiration time span, the app uses 3600s (see application.yml).

####Requirements to consider before using the app

1. The project ought to be built by means of Gradle. For that reason, run gradlew clean build. Subsequently, to start the application make use of gradlew bootRun.
2. Even though integration tests are not currently implemented, all the basic REST operations are covered by unit ones.

####Future improvements

1. Recon the use of Spring Security Oath2 and a probational key-value storage for caching (like Redis, Hazelcast).
2. Never use application.yml for storing sensitive data in a production environment. For that reason, consider either secured storage or VM options during build time on a CI/CD server.

#####Environment Have a good look at Docker and put this app into a container. This approach enjoys considerable use in modern development with regard to product delivery process in Microservice Architecture. Today it's only a matter of additional gradle plugin.