feat : Logger 설정 추가

놀이터(예제 코드 작성)/spring-cloud-open-feign/src/main/kotlin/com/banjjoknim/springcloudopenfeign/configuration/FeignConfiguration.kt

@@ -1,7 +1,9 @@
 package com.banjjoknim.springcloudopenfeign.configuration
 
 import com.fasterxml.jackson.databind.DeserializationFeature
+import feign.Logger
 import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer
+import org.springframework.context.annotation.Bean
 import org.springframework.context.annotation.Configuration
 import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder
 
@@ -13,3 +15,42 @@ class FeignConfiguration : Jackson2ObjectMapperBuilderCustomizer {
             .featuresToDisable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES)
     }
 }
+
+/**
+ * For each Feign client, a logger is created by default.
+ *
+ * To enable logging, we should declare it in the application.properties file using the package name of the client interfaces:
+ *
+ * > logging.level.com.baeldung.cloud.openfeign.client: DEBUG
+ *
+ * Or, if we want to enable logging only for one particular client in a package, we can use the full class name:
+ *
+ * > logging.level.com.baeldung.cloud.openfeign.client.JSONPlaceHolderClient: DEBUG
+ *
+ * **Note that Feign logging responds only to the DEBUG level.**
+ *
+ * The ***Logger.Level*** that we may configure per client indicates how much to log:
+ * ```java
+ * public class ClientConfiguration {
+ *
+ *     @Bean
+ *     Logger.Level feignLoggerLevel() {
+ *         return Logger.Level.BASIC;
+ *     }
+ * }
+ * ```
+ *
+ * There are four logging levels to choose from:
+ *
+ * - NONE – no logging, which is the default
+ * - BASIC – log only the request method, URL and response status
+ * - HEADERS – log the basic information together with request and response headers
+ * - FULL – log the body, headers and metadata for both request and response
+ */
+@Configuration
+class LoggerConfiguration {
+    @Bean
+    fun feignLoggerLevel(): Logger.Level {
+        return Logger.Level.FULL
+    }
+}

놀이터(예제 코드 작성)/spring-cloud-open-feign/src/main/resources/application.yaml

@@ -14,4 +14,8 @@ spring:
         physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
         implicit-strategy: org.hibernate.boot.model.naming.ImplicitNamingStrategyLegacyJpaImpl
     show-sql: true
-
+logging:
+  level:
+    com:
+      banjjoknim:
+        springcloudopenfeign: DEBUG