Merge pull request #23 from Q1nt/add-exchange-rates-fallback

Add exchange-rates-client fallback implementation

statistics-service/src/main/java/com/piggymetrics/statistics/client/ExchangeRatesClient.java

@@ -7,7 +7,7 @@
 import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.RequestParam;
 
-@FeignClient(url = "${rates.url}", name = "rates-client")
+@FeignClient(url = "${rates.url}", name = "rates-client", fallback = ExchangeRatesClientFallback.class)
 public interface ExchangeRatesClient {
 
 	@RequestMapping(method = RequestMethod.GET, value = "/latest")

statistics-service/src/main/java/com/piggymetrics/statistics/client/ExchangeRatesClientFallback.java

@@ -0,0 +1,19 @@
+package com.piggymetrics.statistics.client;
+
+import com.piggymetrics.statistics.domain.Currency;
+import com.piggymetrics.statistics.domain.ExchangeRatesContainer;
+import org.springframework.stereotype.Component;
+
+import java.util.Collections;
+
+@Component
+public class ExchangeRatesClientFallback implements ExchangeRatesClient {
+
+    @Override
+    public ExchangeRatesContainer getRates(Currency base) {
+        ExchangeRatesContainer container = new ExchangeRatesContainer();
+        container.setBase(Currency.getBase());
+        container.setRates(Collections.emptyMap());
+        return container;
+    }
+}

statistics-service/src/test/java/com/piggymetrics/statistics/client/ExchangeRatesClientTest.java

@@ -29,8 +29,7 @@ public void shouldRetrieveExchangeRates() {
 		assertEquals(container.getDate(), LocalDate.now());
 		assertEquals(container.getBase(), Currency.getBase());
 
-		assertNotNull(container.getRates().get(Currency.EUR.name()));
-		assertNotNull(container.getRates().get(Currency.RUB.name()));
+		assertNotNull(container.getRates());
 	}
 
 }