Added changes to Currency Conversion

Added changes for API call using Feign Client

currency-conversion-service/pom.xml

@@ -30,6 +30,10 @@
 			<groupId>org.springframework.cloud</groupId>
 			<artifactId>spring-cloud-starter-config</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-openfeign</artifactId>
+		</dependency>
 
 		<dependency>
 			<groupId>org.springframework.boot</groupId>

currency-conversion-service/src/main/java/com/vijay/microservices/currencyconversionservice/CurrencyConversionServiceApplication.java

@@ -2,8 +2,10 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.openfeign.EnableFeignClients;
 
 @SpringBootApplication
+@EnableFeignClients
 public class CurrencyConversionServiceApplication {
 
 	public static void main(String[] args) {

currency-conversion-service/src/main/java/com/vijay/microservices/currencyconversionservice/controller/CurrencyConversionController.java

@@ -1,6 +1,8 @@
 package com.vijay.microservices.currencyconversionservice.controller;
 
 import com.vijay.microservices.currencyconversionservice.bean.CurrencyConversion;
+import com.vijay.microservices.currencyconversionservice.proxy.CurrencyExchangeProxy;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
@@ -13,15 +15,27 @@
 @RestController
 public class CurrencyConversionController {
 
+    @Autowired
+    private CurrencyExchangeProxy currencyExchangeProxy;
+
     @GetMapping("currency-conversion/from/{from}/to/{to}/quantity/{quantity}")
     public CurrencyConversion calculateCurrencyConversion(@PathVariable String from, @PathVariable String to, @PathVariable BigDecimal quantity){
 
         HashMap<String,String> uriVariables = new HashMap<>();
         uriVariables.put("from",from);
         uriVariables.put("to",to);
         ResponseEntity<CurrencyConversion> responseEntity = new RestTemplate().getForEntity("http://localhost:8000/currency-exchange/from/{from}/to/{to}", CurrencyConversion.class, uriVariables);
-        CurrencyConversion currenncyConversion = responseEntity.getBody();
-        return new CurrencyConversion(currenncyConversion.getId(),from,to, currenncyConversion.getConversionMultiple(),quantity
-                ,quantity.multiply(currenncyConversion.getConversionMultiple()),currenncyConversion.getEnvironment());
+        CurrencyConversion currencyConversion = responseEntity.getBody();
+        return new CurrencyConversion(currencyConversion.getId(),from,to, currencyConversion.getConversionMultiple(),quantity
+                ,quantity.multiply(currencyConversion.getConversionMultiple()),currencyConversion.getEnvironment());
+    }
+
+    @GetMapping("currency-conversion-feign/from/{from}/to/{to}/quantity/{quantity}")
+    public CurrencyConversion calculateCurrencyConversionFeign(@PathVariable String from, @PathVariable String to, @PathVariable BigDecimal quantity){
+
+        CurrencyConversion currencyConversion = currencyExchangeProxy.retrieveExchangeValue(from, to);
+
+        return new CurrencyConversion(currencyConversion.getId(),from,to, currencyConversion.getConversionMultiple(),quantity
+                ,quantity.multiply(currencyConversion.getConversionMultiple()),currencyConversion.getEnvironment());
     }
 }

currency-conversion-service/src/main/java/com/vijay/microservices/currencyconversionservice/proxy/CurrencyExchangeProxy.java

@@ -0,0 +1,15 @@
+package com.vijay.microservices.currencyconversionservice.proxy;
+
+import com.vijay.microservices.currencyconversionservice.bean.CurrencyConversion;
+import org.springframework.cloud.openfeign.FeignClient;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+
+import java.math.BigDecimal;
+
+@FeignClient(name="currency-exchange", url="localhost:8000")
+public interface CurrencyExchangeProxy {
+
+    @GetMapping("currency-exchange/from/{from}/to/{to}")
+    public CurrencyConversion retrieveExchangeValue(@PathVariable String from, @PathVariable String to);
+}