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Init skeleton application for native compilation demonstration
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‎.gitignore‎

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# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
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hs_err_pid*
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replay_pid*
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/logs/
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/.idea/
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/build/
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/.gradle/
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/gradle/
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/native-app-db.db
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/gradlew
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/gradlew.bat
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.lock

‎build.gradle.kts‎

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import org.gradle.api.tasks.testing.logging.TestExceptionFormat
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import org.gradle.api.tasks.testing.logging.TestLogEvent
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import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
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val jdkVersion = JavaVersion.VERSION_17
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val jacksonVersion = "2.14.0"
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val jacksonDatabindVersion = "2.14.0"
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val jacksonDataFormatVersion = "2.14.0"
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val vavrVersion = "0.10.2"
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val sqliteVersion = "3.43.0.0"
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val hibernateCommunityDialectsVersion = "6.1.6.Final"
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val mapstructVersion = "1.5.3.Final"
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val caffeineVersion = "3.1.6"
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val kotlinLoggingVersion = "4.0.0-beta-22"
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val kotestVersion = "5.6.2"
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val junitPioneerVersion = "2.0.1"
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val springmockkVersion = "4.0.2"
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val mockkVersion = "1.13.7"
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val springRetryVersion = "2.0.0"
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val jsonApiVersion = "1.10.1"
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val logstashLogbackEncoderVersion = "7.3"
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val okhttp3Version = "4.11.0"
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val awaitilityVersion = "4.2.0"
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val nativeImageConfigPath = "$projectDir/src/main/resources/META-INF/native-image"
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val nativeImageAccessFilterConfigPath = "./src/test/resources/native/access-filter.json"
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plugins {
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val springBootVersion = "3.1.3"
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val kotlinVersion = "1.9.0"
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val testLoggerPluginVersion = "3.2.0"
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val springBootDependencyManagementPluginVersion = "1.1.0"
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val buildToolsNativeVersion = "0.9.21"
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kotlin("jvm") version kotlinVersion
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kotlin("kapt") version kotlinVersion
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kotlin("plugin.spring") version kotlinVersion
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kotlin("plugin.jpa") version kotlinVersion
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id("org.jetbrains.kotlin.plugin.allopen") version kotlinVersion
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id("org.springframework.boot") version springBootVersion
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id("io.spring.dependency-management") version springBootDependencyManagementPluginVersion
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id("com.adarshr.test-logger").version(testLoggerPluginVersion)
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id("org.graalvm.buildtools.native") version buildToolsNativeVersion
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}
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graalvmNative {
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binaries {
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named("main") {
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buildArgs(
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"-H:+ReportExceptionStackTraces",
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"-H:EnableURLProtocols=http,https",
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)
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}
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}
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}
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group = "com.app"
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version = "1.0.0"
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java.sourceCompatibility = jdkVersion
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repositories {
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mavenCentral()
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maven { url = uri("https://repo.spring.io/milestone") }
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mavenLocal()
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}
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java {
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sourceCompatibility = jdkVersion
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targetCompatibility = jdkVersion
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withJavadocJar()
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withSourcesJar()
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}
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dependencies {
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implementation("org.springframework.boot:spring-boot-starter")
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implementation("org.springframework.boot:spring-boot-starter-data-jpa")
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implementation("org.springframework.boot:spring-boot-starter-web")
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implementation("org.springframework.boot:spring-boot-starter-websocket")
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implementation("org.springframework.boot:spring-boot-starter-cache")
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implementation("org.jetbrains.kotlin:kotlin-reflect")
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implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
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implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core")
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implementation("com.fasterxml.jackson.core:jackson-databind:$jacksonDatabindVersion")
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implementation("com.fasterxml.jackson.module:jackson-module-kotlin:$jacksonVersion")
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implementation("com.fasterxml.jackson.datatype:jackson-datatype-jsr310:$jacksonVersion")
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implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-xml:$jacksonDataFormatVersion")
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implementation("io.vavr:vavr-kotlin:$vavrVersion")
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implementation("org.flywaydb:flyway-core")
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implementation("org.xerial:sqlite-jdbc:$sqliteVersion")
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implementation("org.hibernate.orm:hibernate-community-dialects:$hibernateCommunityDialectsVersion")
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implementation("org.mapstruct:mapstruct:$mapstructVersion")
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implementation("com.github.ben-manes.caffeine:caffeine:$caffeineVersion")
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implementation("io.github.oshai:kotlin-logging-jvm:$kotlinLoggingVersion")
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implementation("org.springframework.retry:spring-retry:$springRetryVersion")
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implementation("net.logstash.logback:logstash-logback-encoder:$logstashLogbackEncoderVersion")
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implementation("com.squareup.okhttp3:okhttp:$okhttp3Version")
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implementation("com.slm-dev:jsonapi-simple:$jsonApiVersion")
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kapt("org.mapstruct:mapstruct-processor:$mapstructVersion")
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implementation("org.springframework.boot:spring-boot-starter-test")
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implementation("io.kotest:kotest-runner-junit5:$kotestVersion")
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implementation("io.kotest:kotest-assertions-core:$kotestVersion")
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implementation("io.kotest:kotest-property:$kotestVersion")
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implementation("io.kotest:kotest-assertions-json:$kotestVersion")
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implementation("org.junit-pioneer:junit-pioneer:$junitPioneerVersion")
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implementation("com.ninja-squad:springmockk:$springmockkVersion")
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testImplementation("org.awaitility:awaitility:$awaitilityVersion")
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testImplementation("io.mockk:mockk:$mockkVersion")
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}
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allOpen {
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annotations("javax.persistence.Entity", "javax.persistence.MappedSuperclass", "javax.persistence.Embeddable")
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}
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kapt {
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arguments {
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arg("mapstruct.defaultComponentModel", "spring")
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arg("mapstruct.unmappedTargetPolicy", "ERROR")
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}
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}
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buildscript {
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repositories {
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maven {
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setUrl("https://plugins.gradle.org/m2/")
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}
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}
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}
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tasks.withType<KotlinCompile> {
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kotlinOptions {
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freeCompilerArgs = listOf("-Xjsr305=strict")
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jvmTarget = jdkVersion.toString()
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}
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}
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tasks.withType<Test> {
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useJUnitPlatform()
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jvmArgs = listOf(
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"-agentlib:native-image-agent=access-filter-file=$nativeImageAccessFilterConfigPath,config-merge-dir=$nativeImageConfigPath"
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)
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testlogger {
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setTheme("mocha")
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}
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testLogging {
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events = setOf(
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TestLogEvent.STARTED,
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TestLogEvent.FAILED,
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TestLogEvent.PASSED,
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TestLogEvent.SKIPPED,
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TestLogEvent.STANDARD_ERROR,
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TestLogEvent.STANDARD_OUT
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)
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exceptionFormat = TestExceptionFormat.FULL
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showStandardStreams = false
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showCauses = true
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showExceptions = true
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showStackTraces = true
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}
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}
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kapt {
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arguments {
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arg("mapstruct.defaultComponentModel", "spring")
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arg("mapstruct.unmappedTargetPolicy", "ERROR")
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}
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}
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springBoot {
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buildInfo()
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}

‎ci/build.py‎

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import _thread
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import argparse as argparse
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import logging
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import os
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import signal
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import subprocess
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import time
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logging.basicConfig(format='%(asctime)s [%(levelname)-5s] - %(message)s')
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logger = logging.getLogger('builder')
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logger.setLevel("INFO")
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GRAALVM_HOME_PATH = "/Users/ev.mareycheva/opt/graalvm-jdk-17/Contents/Home"
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GRAALVM_JAVA_PATH = f"{GRAALVM_HOME_PATH}/bin/java"
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NATIVE_IMAGE_RESOURCES_PATH = "./src/main/resources/META-INF/native-image"
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def build_sources():
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subprocess.run(
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['gradle', 'clean', 'build', '-x', 'test'],
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env={**os.environ, 'JAVA_HOME': GRAALVM_HOME_PATH},
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)
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def start_aot_native_agent(aot_wait_timeout_minutes):
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process = subprocess.Popen(
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f'{GRAALVM_JAVA_PATH} "-Dspring.aot.enabled=true" -agentlib:native-image-agent=config-merge-dir={NATIVE_IMAGE_RESOURCES_PATH} -jar build/libs/kotlin-spring-boot-native-skeleton-1.0.0.jar',
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT,
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shell=True
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)
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_thread.start_new_thread(print_aot_native_agent_logs, ('print-aot-logs', process.stdout))
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time.sleep(aot_wait_timeout_minutes * 60)
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os.kill(process.pid, signal.SIGTERM)
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def print_aot_native_agent_logs(_, stdout):
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with stdout:
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for line in iter(stdout.readline, b''):
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print(line.decode("utf-8").strip())
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def build_native_image():
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subprocess.run(['gradle', 'nativeCompile'])
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if __name__ == "__main__":
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args_parser = argparse.ArgumentParser()
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args_parser.add_argument(
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'--disable-build-native-image',
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default=False,
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action='store_true',
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help='Disable build native image'
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)
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args_parser.add_argument(
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'--aot-wait',
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default=20,
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type=int,
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help='Terminate AOT stage after N minutes'
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)
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args = args_parser.parse_args()
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if args.disable_build_native_image:
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logger.info("Build native image step disabled. Run only build source and native-image-agent steps")
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build_sources()
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start_aot_native_agent(args.aot_wait)
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if not args.disable_build_native_image:
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build_native_image()

‎ci/requirements.txt‎

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argparse==1.4.0

‎gradle.properties‎

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kotlin.code.style=official

‎settings.gradle.kts‎

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pluginManagement {
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repositories {
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maven { url = uri("https://repo.spring.io/milestone") }
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maven { url = uri("https://repo.spring.io/snapshot") }
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gradlePluginPortal()
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}
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}
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rootProject.name = "kotlin-spring-boot-native-skeleton"

‎src/main/kotlin/com/app/MainApplication.kt‎

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package com.app
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import io.github.oshai.KotlinLogging
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import org.springframework.boot.autoconfigure.SpringBootApplication
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import org.springframework.boot.info.BuildProperties
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import org.springframework.boot.runApplication
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import java.time.LocalDate
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import java.time.ZoneOffset
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@SpringBootApplication
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class MainApplication(
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private val buildProperties: BuildProperties,
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) {
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private val logger = KotlinLogging.logger {}
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init {
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logger.info { "App version: ${buildProperties.version}" }
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logger.info { "App build time: ${LocalDate.ofInstant(buildProperties.time, ZoneOffset.UTC)}" }
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}
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}
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fun main(args: Array<String>) {
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runApplication<MainApplication>(*args)
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}

‎src/main/kotlin/com/app/config/AppConfig.kt‎

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package com.app.config
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import org.springframework.boot.autoconfigure.domain.EntityScan
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import org.springframework.context.annotation.ComponentScan
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import org.springframework.context.annotation.Configuration
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import org.springframework.data.jpa.repository.config.EnableJpaRepositories
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import org.springframework.retry.annotation.EnableRetry
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import org.springframework.scheduling.annotation.EnableScheduling
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import org.springframework.transaction.annotation.EnableTransactionManagement
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@Configuration
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@EnableScheduling
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@EnableRetry
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@EnableTransactionManagement
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@EntityScan(basePackages = ["com.app.entity"])
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@EnableJpaRepositories(basePackages = ["com.app.repository"])
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@ComponentScan("com.app")
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class AppConfig

‎src/main/kotlin/com/app/config/BeanConfig.kt‎

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package com.app.config
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import com.fasterxml.jackson.annotation.JsonInclude
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import com.fasterxml.jackson.databind.DeserializationFeature
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import com.fasterxml.jackson.databind.MapperFeature
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import com.fasterxml.jackson.databind.ObjectMapper
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import com.fasterxml.jackson.databind.SerializationFeature
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import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule
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import com.fasterxml.jackson.module.kotlin.jacksonMapperBuilder
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import okhttp3.OkHttpClient
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import org.springframework.context.annotation.Bean
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import org.springframework.context.annotation.Configuration
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import org.springframework.retry.support.RetryTemplate
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import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler
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import org.springframework.web.client.RestTemplate
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import org.springframework.web.servlet.config.annotation.CorsRegistry
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import org.springframework.web.servlet.config.annotation.WebMvcConfigurer
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@Configuration
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class BeanConfig {
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companion object {
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fun newObjectMapper(includeNull: Boolean = false): ObjectMapper {
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val jacksonMapperBuilder = jacksonMapperBuilder()
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jacksonMapperBuilder.addModule(JavaTimeModule())
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jacksonMapperBuilder.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false)
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jacksonMapperBuilder.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
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jacksonMapperBuilder.enable(MapperFeature.ACCEPT_CASE_INSENSITIVE_ENUMS)
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if (!includeNull) {
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jacksonMapperBuilder.serializationInclusion(JsonInclude.Include.NON_NULL)
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}
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return jacksonMapperBuilder.build()
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}
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}
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@Bean
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fun corsConfigurer(): WebMvcConfigurer {
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return object : WebMvcConfigurer {
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override fun addCorsMappings(registry: CorsRegistry) {
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registry.addMapping("/**")
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.allowedOrigins("*")
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.allowedMethods("*")
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}
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}
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}
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@Bean
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fun taskScheduler(): ThreadPoolTaskScheduler {
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val threadPoolTaskScheduler = ThreadPoolTaskScheduler()
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threadPoolTaskScheduler.poolSize = 32
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return threadPoolTaskScheduler
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}
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@Bean
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fun objectMapper() = newObjectMapper()
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@Bean
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fun retryTemplate(): RetryTemplate = RetryTemplate.builder()
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.maxAttempts(4)
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.fixedBackoff(500L)
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.retryOn(Exception::class.java)
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.build()
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@Bean
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fun restTemplate() = RestTemplate()
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@Bean
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fun okHttpClient() = OkHttpClient()
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}

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