Spring-fu-Kofu: Unable to wire `NamedParameterJdbcTemplate` - spring

Question

I am playing around with Kofu functional Bean DSL. I am using Spring-Data-JDBC with Spring-MVC and trying to autowire NamedParameterJdbcTemplate. However, I am have been receiving this error that no beans found for it while running tests. In a annotation based approach, we don’t have to supply an explicit NamedParameterJdbcTemplate. My sample app here: https://github.com/overfullstack/kofu-mvc-jdbc. And PFB some code snippets from it:
val app = application(WebApplicationType.SERVLET) {
beans {
bean<SampleService>()
bean<UserHandler>()
}
enable(dataConfig)
enable(webConfig)
}
val dataConfig = configuration {
beans {
bean<UserRepository>()
}
listener<ApplicationReadyEvent> {
ref<UserRepository>().init()
}
}
val webConfig = configuration {
webMvc {
port = if (profiles.contains("test")) 8181 else 8080
router {
val handler = ref<UserHandler>()
GET("/", handler::hello)
GET("/api", handler::json)
}
converters {
string()
jackson()
}
}
}
class UserRepository(private val client: NamedParameterJdbcTemplate) {
fun count() =
client.queryForObject("SELECT COUNT(*) FROM users", emptyMap<String, String>(), Int::class.java)
}
open class UserRepositoryTests {
private val dataApp = application(WebApplicationType.NONE) {
enable(dataConfig)
}
private lateinit var context: ConfigurableApplicationContext
#BeforeAll
fun beforeAll() {
context = dataApp.run(profiles = "test")
}
#Test
fun count() {
val repository = context.getBean<UserRepository>()
assertEquals(3, repository.count())
}
#AfterAll
fun afterAll() {
context.close()
}
}
This is the error:
Parameter 0 of constructor in com.sample.UserRepository required a bean of type 'org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate' that could not be found.
Action:
Consider defining a bean of type 'org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate' in your configuration.
Please help, thanks

Answer 1

Apparently Kofu doesn't pick datasource from application.properties file. Everything is meant to be declarative and no implicit derivations. (Basically no Spring magic 🙂). This worked for me:
val dataConfig = configuration {
beans {
bean {
val dataSourceBuilder = DataSourceBuilder.create()
dataSourceBuilder.driverClassName(“org.h2.Driver”)
dataSourceBuilder.url(“jdbc:h2:mem:test”)
dataSourceBuilder.username(“SA”)
dataSourceBuilder.password(“”)
dataSourceBuilder.build()
}
bean<NamedParameterJdbcTemplate>()
bean<UserRepository>()
}
listener<ApplicationReadyEvent> {
ref<UserRepository>().init()
}
}