bastman

Images[].{a:length(BlockDeviceMappings), b:@} | [?a>=`1`]
Images[?length(BlockDeviceMappings)>=`0`]

bastman

$ gradle init --type kotlin-application --dsl kotlin

bastman

fun PlatformTransactionManager.transactionTemplate(propagationBehavior:Int = TransactionDefinition.PROPAGATION_REQUIRED) = TransactionTemplate(this)
        .apply {
            this.propagationBehavior=propagationBehavior
        }

fun <T>TransactionTemplate.tryExecute(block:(TransactionStatus)->T):Try<T> = Try { this.execute(block) as T }

@Component
class MyTx() {

bastman

import java.math.*
fun main() {
    println("Hello, world!!!")
    val myValue=-1.25
    val out = BigDecimal(myValue).setScale(1, RoundingMode.HALF_UP).toDouble();
    println("$out")
}

bastman

$ sdk install gradle 6.1.1
$ sdk use gradle 6.1.1
$ gradle wrapper --gradle-version=6.1.1
$ ./gradlew init --type kotlin-application --dsl kotlin

bastman

// phantom types
// https://proandroiddev.com/phantom-types-in-kotlin-afd3f59fde10


sealed class DoorState
object Open: DoorState()
object Closed: DoorState()

/*
class Door(val state: DoorState) {

bastman

how to encrypt/decrypt secret files ?

• ansible-vault
• mozilla-sops: https://github.com/mozilla/sops

mozilla sops is an editor of encrypted files that supports YAML, JSON, ENV, INI and BINARY formats and encrypts with AWS KMS, GCP KMS, Azure Key Vault and PGP

bastman

https://kotlinexpertise.com/kotlin-http4k/

• sever as a function. the paper: https://monkey.org/~marius/funsrv.pdf

bastman

/**
 * Annotations: @RestApiQueryHandler, @RestApiMutationHandler
 * as specialization of @Component
 * see: @Service for impl.
 *
 */
import org.springframework.core.annotation.AliasFor
import org.springframework.stereotype.Component

@kotlin.annotation.Target(AnnotationTarget.CLASS)

bastman

processing-guarantees-in-kafka: https://medium.com/@andy.bryant/processing-guarantees-in-kafka-12dd2e30be0e