Covid19apiApplication.java

package com.rest.api.covid19;

import com.rest.api.covid19.domain.Country;
import com.rest.api.covid19.domain.Covid19Statistics;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.client.RestTemplate;

import java.util.List;
import java.util.stream.Collectors;

import static java.util.Comparator.comparing;

@Slf4j
@SpringBootApplication
public class Covid19apiApplication implements ApplicationRunner {

	static final String COVID19_SUMMARY_URL = "https://api.covid19api.com/summary";

	public static void main(String[] args) {
		SpringApplication.run(Covid19apiApplication.class, args);
	}

	@Override
	public void run(ApplicationArguments args) {
		RestTemplate restTemplate = new RestTemplate();

		final Covid19Statistics body = restTemplate.getForEntity(COVID19_SUMMARY_URL, Covid19Statistics.class)
				.getBody();

		assert body != null;

		final List<Country> top5 = body.getCountries().stream()
				.sorted(comparing(Country::getTotalDeaths, comparing(Math::abs)).reversed())
				.limit(5)
				.collect(Collectors.toList());

		top5.forEach(country -> log.info(country.getCountryName() + " " + country.getTotalDeaths()));
	}
}