Currency price extractor

Okay, now in Doubloon there is a service that validates that the messages are well-formed. Also, the service enriches the messages with the customer's geolocation. Now the business indicates that they need a service that properly returns the requested currency price.

Getting ready

The execution of the previous recipes in this chapter is needed.

How to do it...

Go to the Open Exchange Rates page at: https://openexchangerates.org/. Register for a free plan to obtain your free API key. This key is needed to access the free API.

Create a file called OpenExchange.java in the src/main/java/doubloon/extractors directory with the following contents:

package doubloon.extractors; 
 
import com.fasterxml.jackson.databind.JsonNode; 
import com.fasterxml.jackson.databind.ObjectMapper; 
import java.io.IOException; 
import java.net.MalformedURLException; 
import java.net.URL; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
 
public class OpenExchange { 
   
  private...