Running Spring Boot On Command Line.kt

/**
  * This is a MWE on how to reuse the data classes of your Spring Boot application for other scripts
  * I had to do that so I could have a script that extract informations from the DB without going through the API
  */

package com.example
import com.support.DataElement
import org.springframework.boot.Banner
import org.springframework.boot.CommandLineRunner
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.boot.autoconfigure.domain.EntityScan
import org.springframework.data.repository.CrudRepository
import org.springframework.stereotype.Service
import org.springframework.data.jpa.repository.config.EnableJpaRepositories
import java.lang.System.exit
import org.springframework.boot.SpringApplication
import org.springframework.boot.WebApplicationType

@EnableJpaRepositories
class Config

interface RawRepository : CrudRepository<DataElement, Long>

@Service
@EntityScan("com.support")
class MyService(private val rawRepository: RawRepository) {
    fun count(): String {
        return rawRepository.count().toString()
    }
}

@Suppress("SpringJavaInjectionPointsAutowiringInspection")
@SpringBootApplication
class Counter(private var myService: MyService): CommandLineRunner {
    @Override
    override fun run(vararg p0: String?) {
        println(myService.count())
        exit(0)
    }
}

fun main(args: Array<String>) {
    val app = SpringApplication(Counter::class.java)
    app.setBannerMode(Banner.Mode.OFF)
    app.webApplicationType = WebApplicationType.NONE
    app.run(*args)
}