init

src/main/kotlin/mvc/services/UserComplexService.kt

@@ -0,0 +1,18 @@
+package mvc.services
+
+import shared.exceptions.NotFoundException
+import mvc.dao.UserRepository
+import mvc.entities.User
+
+
+class UserComplexService(
+    val repository: UserRepository
+) : UserService {
+    // 用户
+    override fun changeUsername(user: User): User {
+        val findUser = repository.findById(user.id) ?: throw NotFoundException("User ${user.id} not found")
+        val copy = findUser.copy(firstName = user.firstName, lastName = user.lastName)
+        repository.update(copy)
+        return copy
+    }
+}

src/main/kotlin/mvc/services/UserService.kt

@@ -0,0 +1,7 @@
+package mvc.services
+
+import mvc.entities.User
+
+interface UserService {
+    fun changeUsername(user: User): User
+}

src/main/kotlin/mvc/services/UserSimpleService.kt

@@ -0,0 +1,14 @@
+package mvc.services
+
+import shared.exceptions.NotFoundException
+import mvc.dao.UserRepository
+import mvc.entities.User
+
+class UserSimpleService(val repository: UserRepository) : UserService {
+    override fun changeUsername(user: User): User {
+        val findUser = repository.findById(user.id) ?: throw NotFoundException("User ${user.id} not found")
+        val copy = findUser.copy(firstName = user.firstName, lastName = user.lastName)
+        repository.update(copy)
+        return copy
+    }
+}