feat: Resilience4j 의존성 추가 및 설정

Author: Kimjipang

apps/commerce-api/build.gradle.kts

@@ -19,6 +19,10 @@ dependencies {
     // FeignClient
     implementation("org.springframework.cloud:spring-cloud-starter-openfeign")
 
+    // Resilience4j
+    implementation("io.github.resilience4j:resilience4j-spring-boot3")
+    implementation("org.springframework.boot:spring-boot-starter-aop")
+
     // test-fixtures
     testImplementation(testFixtures(project(":modules:jpa")))
     testImplementation(testFixtures(project(":modules:redis")))

apps/commerce-api/src/main/resources/application.yml

@@ -29,6 +29,26 @@ springdoc:
   swagger-ui:
     path: /swagger-ui.html
 
+resilience4j:
+  retry:
+    instances:
+      pgRetry:
+        max-attempts: 3
+        wait-duration: 1s
+        retry-exceptions:
+          - feign.RetryableException
+        fail-after-max-attempts: true
+
+  circuitbreaker:
+    instances:
+      pgCircuit:
+        sliding-window-size: 5
+        failure-rate-threshold: 20       # 실패율이 50% 넘으면 Open
+        wait-duration-in-open-state: 60s # Open 상태 유지 시간
+        permitted-number-of-calls-in-half-open-state: 2
+        slow-call-duration-threshold: 2s
+        slow-call-rate-threshold: 50
+
 ---
 spring:
   config: