Simple NBP REST API

This REST API fetches data from the Narodowy Bank Polski's public APIs and returns relevant information from them (http://api.nbp.pl/).

Table of contents

• Compiling and running
• Usage
• Endpoints

Compiling and running

• Using maven package and java -jar:

$ ./mvnw package
$ java -jar target/dynatrace-backend-task-1.0.jar

• Executing directly with maven

$ ./mvnw compile exec:java

• Using docker (you can specify your own port):

$ ./mvnw spring-boot:build-image
$ docker run -p 8080:8080 docker.io/library/dynatrace-backend-task:1.0

Usage

Application by default will be available at port 8080. You can test the API using your application of choice, but there is also a swagger UI available at /swagger-ui/index.html

Endpoints

• GET /api/avg/{currencyCode}/{date}:
  • takes arguments:
    • currencyCode is the code of currency defined at https://nbp.pl/en/statistic-and-financial-reporting/rates/table-a/
    • date is the date in format YYYY-MM-DD
  • returns:
    • single number which is the average exchange rate of the currency; e.g:

    4.2067

• GET /api/minmax/{currencyCode}/{numberOfLastQuotations}:
  • takes arguments:
    • currencyCode is the code of currency defined at https://nbp.pl/en/statistic-and-financial-reporting/rates/table-a/
    • numberOfLastQuotations is the number of last quotations of the currency. Max value is 255
  • returns:
    • two values, first is the minimum and second one is the maximum value of the currency in the last numberOfLastQuotations quotations; e.g:

    {
       "min": 5.2086,
       "max": 5.3648
    }

• GET /api/maxdiff/{currencyCode}/{numberOfQuotations}:
  • takes arguments:
    • currencyCode is the code of currency defined at https://nbp.pl/en/statistic-and-financial-reporting/rates/table-a/
    • numberOfLastQuotations is the number of last quotations of the currency. Max value is 255
  • returns:
    • single number which is the major difference between the buy and ask rate in the last numberOfLastQuotations quotations; e.g:

    0.1096