kotlin-spring

name	kotlin-spring
description	Spring Boot with Kotlin - controllers, services, coroutines
version	1.0.0
sasmp_version	1.3.0
bonded_agent	05-kotlin-backend
bond_type	SECONDARY_BOND
execution	{"timeout_ms":30000,"retry":{"max_attempts":3,"backoff":"exponential","initial_delay_ms":1000}}
parameters	{"required":[{"name":"topic","type":"string","validation":"^(setup|controllers|jpa|coroutines|testing)$"}],"optional":[{"name":"spring_version","type":"string","default":"3.2"}]}
logging	{"level":"info","events":["skill_invoked","topic_loaded","error_occurred"]}

Kotlin Spring Skill

Idiomatic Spring Boot development with Kotlin.

Topics Covered

REST Controllers

@RestController
@RequestMapping("/api/v1/users")
class UserController(private val userService: UserService) {

    @GetMapping
    suspend fun findAll(): List<UserDTO> = userService.findAll()

    @GetMapping("/{id}")
    suspend fun findById(@PathVariable id: Long): UserDTO =
        userService.findById(id) ?: throw ResponseStatusException(NOT_FOUND)

    @PostMapping
    @ResponseStatus(CREATED)
    suspend fun create(@Valid @RequestBody request: CreateUserRequest) =
        userService.create(request)
}

Coroutines Integration

@Service
class UserService(private val repository: UserRepository) {
    suspend fun findAll() = withContext(Dispatchers.IO) {
        repository.findAll().map { it.toDTO() }
    }
}

Data JPA

@Entity
@Table(name = )
 (
       id:  = ,
      email: String,
      name: String
)

  : <> {
    : User?
}