[CHORE] 커스텀 메트릭 지표 논의 및 구현

src/main/java/com/debatetimer/client/notifier/DiscordNotifier.java

@@ -2,6 +2,7 @@
 
 import com.debatetimer.exception.custom.DTInitializationException;
 import com.debatetimer.exception.errorcode.InitializationErrorCode;
+import io.micrometer.core.annotation.Timed;
 import java.util.Arrays;
 import java.util.stream.Collectors;
 import lombok.extern.slf4j.Slf4j;
@@ -34,6 +35,7 @@ private JDA initializeJda(String token) {
         }
     }
 
+    @Timed(value = "discord.send_error_message")
     public void sendErrorMessage(Throwable throwable) {
         TextChannel channel = jda.getTextChannelById(properties.getChannelId());
         String errorMessage = throwable.toString();

src/main/java/com/debatetimer/client/oauth/OAuthClient.java

@@ -5,6 +5,7 @@
 import com.debatetimer.dto.member.MemberInfo;
 import com.debatetimer.dto.member.OAuthToken;
 import com.debatetimer.exception.handler.OAuthClientErrorHandler;
+import io.micrometer.core.annotation.Timed;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.http.HttpStatusCode;
 import org.springframework.http.MediaType;
@@ -24,6 +25,7 @@ public OAuthClient(RestClient.Builder restClientBuilder, OAuthProperties oauthPr
         this.oauthProperties = oauthProperties;
     }
 
+    @Timed(value = "google.request_token")
     public OAuthToken requestToken(MemberCreateRequest request) {
         return restClient.post()
                 .uri("https://oauth2.googleapis.com/token")
@@ -34,6 +36,7 @@ public OAuthToken requestToken(MemberCreateRequest request) {
                 .body(OAuthToken.class);
     }
 
+    @Timed(value = "google.request_member_info")
     public MemberInfo requestMemberInfo(OAuthToken response) {
         return restClient.get()
                 .uri("https://www.googleapis.com/oauth2/v3/userinfo")

src/main/java/com/debatetimer/config/MonitoringConfig.java

@@ -0,0 +1,17 @@
+package com.debatetimer.config;
+
+import io.micrometer.core.aop.TimedAspect;
+import io.micrometer.core.instrument.MeterRegistry;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class MonitoringConfig {
+
+    @Bean
+    @ConditionalOnMissingBean(TimedAspect.class)
+    public TimedAspect timedAspect(MeterRegistry registry) {
+        return new TimedAspect(registry);
+    }
+}