ExchangeRateChecker

This is a microservice which pulls the exchange rate from euro to dollar from an API, and writes it to a DB. The exchange rates can be accessed via two REST endpoints which return a JSON payload. One returns the most recent exchange rate and the other returns all exchange rates in between two timestamps. For further details see the swagger file.

How to run

• get the JDK of your choice (would recommend 9 or higher tho)
• install Postgres (https://www.postgresql.org/download/)
• this is optional but Id recommend using a Postgres client like Postico (https://eggerapps.at/postico/) to interact with Postgres
• setup your Postgres user (https://wiki.postgresql.org/wiki/First_steps)
• create a DB named exchange_rates
• create a Table within exchange_rates as follows:

CREATE TABLE "public"."timestamps_and_rates" (
                    "date_time" timestamp without time zone,
                    "rate" real,
                    PRIMARY KEY ("date_time"));

• if you want to change the DB / table / column names make sure to adjust the SQL queries aswell
• clone/fork this repo
• run the project

Tech Choices

• Maven and MavenWrapper for managing libraries, executing tests and building the application
• Spring for dependency injection, DB access, scheduling and so forth
• Postgres for the DB because its open source, object relational and I have some minor experience with it already.
• JUnit for unit testing
• Swagger for API documentation