feat: gateway reactive open feign 설정으로 변경

src/backend/gateway-server/src/main/java/com/lalala/gateway/config/OpenFeignConfig.java

@@ -1,40 +1,28 @@
 package com.lalala.gateway.config;
 
-import org.springframework.cloud.openfeign.EnableFeignClients;
-import org.springframework.cloud.openfeign.FeignFormatterRegistrar;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
-import org.springframework.format.datetime.standard.DateTimeFormatterRegistrar;
 
-import feign.Logger;
-import feign.Retryer;
+import com.lalala.gateway.external.feign.FeignAuthClient;
+import feign.Logger.Level;
+import feign.gson.GsonDecoder;
+import feign.gson.GsonEncoder;
+import feign.reactive.ReactorDecoder;
+import feign.reactive.ReactorFeign;
 
 @Configuration
-@EnableFeignClients("com.lalala.gateway.external.feign")
 public class OpenFeignConfig {
 
-    private static final long START_PERIOD = 100L;
-    private static final long MAX_PERIOD = 3_000L;
-    private static final int MAX_ATTEMPTS = 5;
+    @Value("${auth.url}")
+    private String authEndPoint;
 
     @Bean
-    Retryer.Default retryer() {
-        return new Retryer.Default(START_PERIOD, MAX_PERIOD, MAX_ATTEMPTS);
-    }
-
-    @Bean
-    Logger.Level feignLoggerLevel() {
-        // Feign 은 debug 레벨로만 로그를 남깁니다.
-        // loggin.level.com.lalala.gateway.external.feign=DEBUG
-        return Logger.Level.FULL;
-    }
-
-    @Bean
-    public FeignFormatterRegistrar dateTimeFormatterRegistrar() {
-        return registry -> {
-            DateTimeFormatterRegistrar registrar = new DateTimeFormatterRegistrar();
-            registrar.setUseIsoFormat(true);
-            registrar.registerFormatters(registry);
-        };
+    public FeignAuthClient authClient() {
+        return ReactorFeign.builder()
+                .logLevel(Level.FULL)
+                .encoder(new GsonEncoder())
+                .decoder(new ReactorDecoder(new GsonDecoder()))
+                .target(FeignAuthClient.class, authEndPoint);
     }
 }