feat(UserActivityManager) : DAU, MAU계산 및 export

- 로그인시 계정 없음에 대한 에러코드를 정의하였습니다.
- 로그인시 하루 기준으로 중복되지 않는 사용자에 대해 카운트하고, metricRegistry를 통해 export 합니다.

wabi/src/main/kotlin/com/wap/wabi/WabiApplication.kt

@@ -4,10 +4,12 @@ import jakarta.annotation.PostConstruct
 import org.springframework.boot.autoconfigure.SpringBootApplication
 import org.springframework.boot.runApplication
 import org.springframework.data.jpa.repository.config.EnableJpaAuditing
+import org.springframework.scheduling.annotation.EnableScheduling
 import java.util.TimeZone
 
 @SpringBootApplication
 @EnableJpaAuditing
+@EnableScheduling
 class WabiApplication {
     @PostConstruct
     fun started() {

wabi/src/main/kotlin/com/wap/wabi/auth/admin/entity/Admin.java

@@ -116,4 +116,17 @@ public Admin build() {
             return new Admin(this);
         }
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Admin admin = (Admin) o;
+        return id.equals(admin.id);
+    }
+
+    @Override
+    public int hashCode() {
+        return id.hashCode();
+    }
 }

wabi/src/main/kotlin/com/wap/wabi/auth/admin/service/AdminService.kt

@@ -7,6 +7,7 @@ import com.wap.wabi.auth.admin.payload.response.AdminLoginResponse
 import com.wap.wabi.auth.admin.repository.AdminRefreshTokenRepository
 import com.wap.wabi.auth.admin.repository.AdminRepository
 import com.wap.wabi.auth.admin.util.AdminValidator
+import com.wap.wabi.auth.admin.util.UserActivityManager
 import com.wap.wabi.auth.jwt.JwtTokenProvider
 import com.wap.wabi.exception.ErrorCode
 import com.wap.wabi.exception.RestApiException
@@ -20,7 +21,8 @@ class AdminService(
     private val adminRefreshTokenRepository: AdminRefreshTokenRepository,
     private val tokenProvider: JwtTokenProvider,
     private val adminValidator: AdminValidator,
-    private val encoder: PasswordEncoder
+    private val encoder: PasswordEncoder,
+    private val userActivityManager: UserActivityManager
 ) {
     @Transactional
     fun registerAdmin(adminRegisterRequest: AdminRegisterRequest) {
@@ -36,7 +38,11 @@ class AdminService(
         adminValidator.validateLogin(adminLoginRequest)
         val admin = adminRepository.findByName(adminLoginRequest.name)
             ?.takeIf { admin ->
-                encoder.matches(adminLoginRequest.password, admin.get().password)
+                try {
+                    encoder.matches(adminLoginRequest.password, admin.get().password)
+                } catch (e: Exception) {
+                    throw RestApiException(ErrorCode.BAD_REQUEST_ADMIN_LOGIN)
+                }
             }
             ?: throw RestApiException(ErrorCode.BAD_REQUEST_NOT_EXIST_ADMIN)
         val refreshToken = tokenProvider.createRefreshToken()
@@ -54,6 +60,7 @@ class AdminService(
             )
 
         val accessToken = tokenProvider.createAccessToken("${admin.get().username}:${admin.get().role}")
+        userActivityManager.updateUserActivity(admin.get())
         return AdminLoginResponse(
             name = admin.get().username,
             role = admin.get().role,

wabi/src/main/kotlin/com/wap/wabi/auth/admin/util/UserActivityManager.kt

@@ -0,0 +1,42 @@
+package com.wap.wabi.auth.admin.util
+
+import com.wap.wabi.auth.admin.entity.Admin
+import io.micrometer.core.instrument.Gauge
+import io.micrometer.core.instrument.Metrics
+import org.slf4j.LoggerFactory
+import org.springframework.scheduling.annotation.Scheduled
+import org.springframework.stereotype.Component
+
+
+@Component
+class UserActivityManager {
+    private var dauCounter = 0
+    private var mauCounter = 0
+
+    private val activeUsersToday = HashSet<Admin>()
+
+    private val logger = LoggerFactory.getLogger(UserActivityManager::class.java)
+
+    fun updateUserActivity(admin: Admin) {
+        if (activeUsersToday.add(admin)) {
+            dauCounter++
+            mauCounter++
+        }
+
+        Gauge.builder("user_activity_dau") { dauCounter }.register(Metrics.globalRegistry)
+        Gauge.builder("user_activity_mau") { mauCounter }.register(Metrics.globalRegistry)
+    }
+
+    @Scheduled(cron = "0 0 0 * * ?")
+    fun resetDailyActiveUser() {
+        dauCounter = 0
+        activeUsersToday.clear()
+        logger.info("Reset daily active user")
+    }
+
+    @Scheduled(cron = "0 0 0 1 * ?")
+    fun resetMonthlyActiveUser() {
+        mauCounter = 0
+        logger.info("Reset monthly active user")
+    }
+}

wabi/src/main/kotlin/com/wap/wabi/exception/ErrorCode.kt

@@ -45,4 +45,5 @@ enum class ErrorCode(
     BAD_REQUEST_ADMIN_NAME(HttpStatus.BAD_REQUEST, "800-3", "이름이 형식에 맞지 않습니다."),
     BAD_REQUEST_EXIST_ADMIN(HttpStatus.BAD_REQUEST, "800-4", "이미 존재하는 어드민입니다."),
     BAD_REQUEST_NOT_EXIST_ADMIN(HttpStatus.BAD_REQUEST, "800-5", "존재하지 않는 어드민입니다."),
+    BAD_REQUEST_ADMIN_LOGIN(HttpStatus.BAD_REQUEST, "800-6", "일치하는 계정이 없습니다."),
 }