@EnableRetry
@Configuration
@Import(PropsConfig::class)
class RetryConfig {

    @Bean
    fun retryTemplate(retryProps: RetryProps): RetryTemplate =
        RetryTemplate().apply {
            setBackOffPolicy(
                ExponentialBackOffPolicy().apply {
                    initialInterval = retryProps.initialDelay
                }
            )
            setRetryPolicy(
                SimpleRetryPolicy(
                    retryProps.maxAttempts
                )
            )
        }
}

@ConstructorBinding
@ConfigurationProperties("reporting.app.retry")
data class RetryProps(
    val maxAttempts: Int,
    val initialDelay: Long,
)

@JobScope
@Component
class MyTasklet(
    private val retryTemplate: RetryTemplate, // (*)
    private val myService: MyServiceUsesSpringDataJpa,
) : Tasklet {

    override fun execute(contribution: StepContribution, chunkContext: ChunkContext): RepeatStatus? = run {
        val jobId = chunkContext.stepContext.jobInstanceId
        println("Try executing MyTasklet(jobId=$jobId)")
        val result = retryTemplate.execute<MyData, Throwable> { // (*)
            println("A try:")
            myService.writableMethod(jobId, myData)
        }
        println("A try result: $result")
        RepeatStatus.FINISHED
    }
}

@StepScope
@Component
class EnrichUsersDataProcessor(private val myClient: MyClient) : ItemProcessor<MyData, MyData> {

    @Retryable // (*)
    override fun process(item: MyData): MyData =
        myClient.getData(item.id).run {
            item.copy(
                fullName = "$firstName $lastName",
            )
        }
}

@Service
@Transactional(readOnly = true, propagation = REQUIRES_NEW)
class MyServiceUsesSpringDataJpa(val myRepository: MySpringDataJpaRepository) {

    @Transactional(readOnly = false, propagation = REQUIRES_NEW)
    fun writableMethod(/*...*/): MyData =
        myRepository.save(/*...*/) // saveAll(/*...*/) // deleteAll() // etc...

    fun readableMethod(/*...*/): List<MyData> =
        myRepository.findAll() // findById(/*...*/) // count() // etc...
}