Spring Native Image Demo

Tech Stack

• JDK 21
• Graalvm-jdk-21.0.5+9.1
• Kotlin 1.9.x
• Spring Boot 3.3.x
• Spring Cloud 2023.0.3
• Resilience4j
• Hibernate
• Spring Data JPA
• MapStruct
• Undertow
• OpenFeign
• CloudEvents
• Open API Specification
• PostgreSQL
• JUnit 5
• DataFaker
• Kafka
• Redis
• Gradle
• Kapt
• Gradle Native Build tools
• RFC-9457

Capabilities to Verify

Component	Able To Run?
JPA	Yes
Controllers	Yes
Flyway	No
OpenFeign	Yes
Redis Client	Yes
Kafka Client	Yes
Resilience4j	Yes
Map Struct	Yes
Swagger UI	Yes
Validation	Yes
Cacheable	Yes
Kafka Listener	Yes

OTEL

https://opentelemetry.io/blog/2023/spring-native/ https://github.com/open-telemetry/opentelemetry-java-examples/tree/main/spring-native

Toolchain

https://graalvm.github.io/native-build-tools/latest/gradle-plugin.html

Map Struct

given kotlin data class will generate few constructs, do not set default value for data class, otherwise MapStruct will not assign value to properties.

Cache

https://spring.io/guides/gs/caching

OpenFeign

https://docs.spring.io/spring-cloud-openfeign/reference/spring-cloud-openfeign.html#spring-cloud-feign

Resilience4j

Build Env

export JAVA_HOME="/Library/Java/JavaVirtualMachines/graalvm-jdk-21.0.5+9.1/Contents/Home"
export GRAALVM_HOME=$JAVA_HOME
export PATH=$GRAALVM_HOME/bin:$PATH

Build and Run the Demo

gradle clean nativeCompile

# BUILD SUCCESSFUL in 5m 18s
# 11 actionable tasks: 11 executed

Runtime info

Package size: ~250M

Duration: Started DemoApplicationKt in 1.121 seconds (process running for 1.132)

Running the Native Image

./build/native/nativeCompile/spring-native-image-demo

Run Native directly

gradle clean nativeRun