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.gitignore

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CHANGELOG.md

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## [Unreleased]
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## [1.20.1] - 2025-04-08
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* docs: fix 2 typos (#1739) by @ntestor
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* docs: Correct XML formatting for Maven configuration in Large Messages utility docs (#1796) by @jreijn
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* fix: Load version.properties file as resource stream to fix loading when packaged as jar (#1813) by @phipag
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## [1.20.0] - 2025-03-25
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* feat(cfn-custom-resource): Add optional 'reason' field for detailed failure reporting (#1758) by @moizsh
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## [1.19.0] - 2025-03-07
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* chore(deps): Update deps for jackson ([#1793](https://github.com/aws-powertools/powertools-lambda-java/pull/1793)) by [@sthulb](https://github.com/sthulb)
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* build(deps): bump log4j.version from 2.22.1 to 2.24.3 ([#1777](https://github.com/aws-powertools/powertools-lambda-java/pull/1777)) by [@dependabot](https://github.com/dependabot)
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* chore(deps): update JSII to 1.108 ([#1791](https://github.com/aws-powertools/powertools-lambda-java/pull/1791)) by [@sthulb](https://github.com/sthulb)
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* build(deps): bump jinja2 from 3.1.5 to 3.1.6 in /docs ([#1789](https://github.com/aws-powertools/powertools-lambda-java/pull/1789)) by [@dependabot](https://github.com/dependabot)
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* chore: Update netty version ([#1768](https://github.com/aws-powertools/powertools-lambda-java/pull/1768)) by [@sthulb](https://github.com/sthulb)
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* chore: Set versions of transitive dependencies ([#1767](https://github.com/aws-powertools/powertools-lambda-java/pull/1767)) by [@sthulb](https://github.com/sthulb)
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* chore: update Jackson in examples ([#1766](https://github.com/aws-powertools/powertools-lambda-java/pull/1766)) by [@sthulb](https://github.com/sthulb)
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* build(deps): bump org.apache.maven.plugins:maven-jar-plugin from 3.4.1 to 3.4.2 ([#1731](https://github.com/aws-powertools/powertools-lambda-java/pull/1731)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.xray.recorder.version from 2.15.3 to 2.18.1 ([#1726](https://github.com/aws-powertools/powertools-lambda-java/pull/1726)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.sdk.version from 2.26.29 to 2.27.12 ([#1724](https://github.com/aws-powertools/powertools-lambda-java/pull/1724)) by [@dependabot](https://github.com/dependabot)
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* fix: Allow empty responses as well as null response in AppConfig ([#1673](https://github.com/aws-powertools/powertools-lambda-java/pull/1673)) by [@chrisclayson](https://github.com/chrisclayson)
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* build(deps): bump aws.sdk.version from 2.27.2 to 2.27.7 ([#1715](https://github.com/aws-powertools/powertools-lambda-java/pull/1715)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.sdk.version from 2.26.29 to 2.27.2 ([#1714](https://github.com/aws-powertools/powertools-lambda-java/pull/1714)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.sdk.version from 2.25.26 to 2.26.29 ([#1713](https://github.com/aws-powertools/powertools-lambda-java/pull/1713)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.sdk.version from 2.26.25 to 2.26.29 ([#1712](https://github.com/aws-powertools/powertools-lambda-java/pull/1712)) by [@dependabot](https://github.com/dependabot)
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* chore: deprecate java1.8 al1 ([#1706](https://github.com/aws-powertools/powertools-lambda-java/pull/1706)) by [@jeromevdl](https://github.com/jeromevdl)
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* chore: java 1.8 AL1 is deprecated, fix E2E tests ([#1692](https://github.com/aws-powertools/powertools-lambda-java/pull/1692)) by [@jeromevdl](https://github.com/jeromevdl)
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* build(deps): bump aws.sdk.version from 2.26.21 to 2.26.25 ([#1703](https://github.com/aws-powertools/powertools-lambda-java/pull/1703)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.sdk.version from 2.26.3 to 2.26.21 ([#1697](https://github.com/aws-powertools/powertools-lambda-java/pull/1697)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump jackson.version from 2.17.0 to 2.17.2 ([#1696](https://github.com/aws-powertools/powertools-lambda-java/pull/1696)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump org.apache.commons:commons-lang3 from 3.13.0 to 3.14.0 ([#1694](https://github.com/aws-powertools/powertools-lambda-java/pull/1694)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump commons-io:commons-io from 2.15.1 to 2.16.1 ([#1691](https://github.com/aws-powertools/powertools-lambda-java/pull/1691)) by [@dependabot](https://github.com/dependabot)
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* docs: improve tracing doc for sdk instrumentation ([#1687](https://github.com/aws-powertools/powertools-lambda-java/pull/1687)) by [@jeromevdl](https://github.com/jeromevdl)
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* docs: fix tracing links for xray ([#1686](https://github.com/aws-powertools/powertools-lambda-java/pull/1686)) by [@jeromevdl](https://github.com/jeromevdl)
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* build(deps): bump org.apache.maven.plugins:maven-failsafe-plugin from 3.2.5 to 3.3.0 ([#1679](https://github.com/aws-powertools/powertools-lambda-java/pull/1679)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.sdk.version from 2.25.69 to 2.26.3 ([#1658](https://github.com/aws-powertools/powertools-lambda-java/pull/1658)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump com.github.spotbugs:spotbugs-maven-plugin from 4.7.3.6 to 4.8.5.0 ([#1657](https://github.com/aws-powertools/powertools-lambda-java/pull/1657)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump org.apache.maven.plugins:maven-checkstyle-plugin from 3.3.0 to 3.4.0 ([#1653](https://github.com/aws-powertools/powertools-lambda-java/pull/1653)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.sdk.version from 2.25.50 to 2.25.69 ([#1652](https://github.com/aws-powertools/powertools-lambda-java/pull/1652)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump org.apache.maven.plugins:maven-source-plugin from 3.3.0 to 3.3.1 ([#1646](https://github.com/aws-powertools/powertools-lambda-java/pull/1646)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump org.assertj:assertj-core from 3.25.3 to 3.26.0 ([#1644](https://github.com/aws-powertools/powertools-lambda-java/pull/1644)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.xray.recorder.version from 2.15.1 to 2.15.3 ([#1643](https://github.com/aws-powertools/powertools-lambda-java/pull/1643)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.sdk.version from 2.25.35 to 2.25.50 ([#1642](https://github.com/aws-powertools/powertools-lambda-java/pull/1642)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump com.amazonaws:aws-lambda-java-events from 3.11.2 to 3.11.4 ([#1597](https://github.com/aws-powertools/powertools-lambda-java/pull/1597)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.sdk.version from 2.24.10 to 2.25.6 ([#1603](https://github.com/aws-powertools/powertools-lambda-java/pull/1603)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump org.apache.maven.plugins:maven-surefire-plugin from 3.1.2 to 3.2.5 ([#1596](https://github.com/aws-powertools/powertools-lambda-java/pull/1596)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump org.codehaus.mojo:exec-maven-plugin from 3.1.0 to 3.2.0 ([#1585](https://github.com/aws-powertools/powertools-lambda-java/pull/1585)) by [@dependabot](https://github.com/dependabot)
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* build(deps-dev): bump software.amazon.awscdk:aws-cdk-lib from 2.100.0 to 2.130.0 ([#1586](https://github.com/aws-powertools/powertools-lambda-java/pull/1586)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump io.burt:jmespath-jackson from 0.5.1 to 0.6.0 ([#1587](https://github.com/aws-powertools/powertools-lambda-java/pull/1587)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.sdk.version from 2.21.0 to 2.24.10 ([#1581](https://github.com/aws-powertools/powertools-lambda-java/pull/1581)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump commons-io:commons-io from 2.13.0 to 2.15.1 ([#1584](https://github.com/aws-powertools/powertools-lambda-java/pull/1584)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.xray.recorder.version from 2.14.0 to 2.15.1 ([#1583](https://github.com/aws-powertools/powertools-lambda-java/pull/1583)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump org.apache.maven.plugins:maven-shade-plugin from 3.5.0 to 3.5.2 ([#1582](https://github.com/aws-powertools/powertools-lambda-java/pull/1582)) by [@dependabot](https://github.com/dependabot)
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* build(deps-dev): bump org.yaml:snakeyaml from 2.1 to 2.2 ([#1400](https://github.com/aws-powertools/powertools-lambda-java/pull/1400)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump log4j.version from 2.20.0 to 2.22.1 ([#1547](https://github.com/aws-powertools/powertools-lambda-java/pull/1547)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump org.apache.maven.plugins:maven-artifact-plugin from 3.4.1 to 3.5.0 ([#1485](https://github.com/aws-powertools/powertools-lambda-java/pull/1485)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump com.amazonaws:aws-lambda-java-serialization from 1.1.2 to 1.1.5 ([#1573](https://github.com/aws-powertools/powertools-lambda-java/pull/1573)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump org.jacoco:jacoco-maven-plugin from 0.8.10 to 0.8.11 ([#1509](https://github.com/aws-powertools/powertools-lambda-java/pull/1509)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aspectj to 1.9.21 for jdk21 ([#1536](https://github.com/aws-powertools/powertools-lambda-java/pull/1536)) by [@jeromevdl](https://github.com/jeromevdl)
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* docs: HelloWorldStreamFunction in examples fails with sam ([#1532](https://github.com/aws-powertools/powertools-lambda-java/pull/1532)) by [@jasoniharris](https://github.com/jasoniharris)
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* chore: Testing java21 aspectj pre-release ([#1519](https://github.com/aws-powertools/powertools-lambda-java/pull/1519)) by [@scottgerring](https://github.com/scottgerring)
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* fix: LargeMessageIdempotentE2ET Flaky ([#1518](https://github.com/aws-powertools/powertools-lambda-java/pull/1518)) by [@scottgerring](https://github.com/scottgerring)
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* build(deps): bump software.amazon.payloadoffloading:payloadoffloading-common from 2.1.3 to 2.2.0 ([#1639](https://github.com/aws-powertools/powertools-lambda-java/pull/1639)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump org.apache.maven.plugins:maven-jar-plugin from 3.3.0 to 3.4.1 ([#1638](https://github.com/aws-powertools/powertools-lambda-java/pull/1638)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump jackson.version from 2.15.3 to 2.17.0 ([#1637](https://github.com/aws-powertools/powertools-lambda-java/pull/1637)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.sdk.version from 2.25.31 to 2.25.35 ([#1629](https://github.com/aws-powertools/powertools-lambda-java/pull/1629)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.sdk.version from 2.25.16 to 2.25.31 ([#1625](https://github.com/aws-powertools/powertools-lambda-java/pull/1625)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.sdk.version from 2.21.1 to 2.25.26 ([#1622](https://github.com/aws-powertools/powertools-lambda-java/pull/1622)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump org.apache.maven.plugins:maven-failsafe-plugin from 3.1.2 to 3.2.5 ([#1619](https://github.com/aws-powertools/powertools-lambda-java/pull/1619)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump com.fasterxml.jackson.datatype:jackson-datatype-joda from 2.15.2 to 2.17.0 ([#1616](https://github.com/aws-powertools/powertools-lambda-java/pull/1616)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump aws.sdk.version from 2.25.6 to 2.25.16 ([#1613](https://github.com/aws-powertools/powertools-lambda-java/pull/1613)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump org.apache.maven.plugins:maven-gpg-plugin from 3.1.0 to 3.2.1 ([#1610](https://github.com/aws-powertools/powertools-lambda-java/pull/1610)) by [@dependabot](https://github.com/dependabot)
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* build(deps): bump org.assertj:assertj-core from 3.24.2 to 3.25.3 ([#1609](https://github.com/aws-powertools/powertools-lambda-java/pull/1609)) by [@dependabot](https://github.com/dependabot)
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GraalVM.md

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# GraalVM Compatibility for AWS Lambda Powertools Java
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## Table of Contents
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- [Overview](#overview)
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- [Prerequisites](#prerequisites)
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- [General Implementation Steps](#general-implementation-steps)
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- [Known Issues and Solutions](#known-issues-and-solutions)
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- [Reference Implementation](#reference-implementation)
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## Overview
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This documentation provides guidance for adding GraalVM support for AWS Lambda Powertools Java modules and using the modules in Lambda functions.
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## Prerequisites
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- GraalVM 21+ installation
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- Maven 3.x
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## General Implementation Steps
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GraalVM native image compilation requires complete knowledge of an application's dynamic features at build time. The GraalVM reachability metadata (GRM) JSON files are essential because Java applications often use features that are determined at runtime, such as reflection, dynamic proxy classes, resource loading, and JNI (Java Native Interface). The metadata files tell GraalVM which classes need reflection access, which resources need to be included in the native image, and which proxy classes need to be generated.
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In order to generate the metadata reachability files for Powertools for Lambda, follow these general steps.
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1. **Add Maven Profiles**
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- Add profile for generating GraalVM reachability metadata files. You can find an example of this in profile `generate-graalvm-files` of this [pom.xml](powertools-common/pom.xml).
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- Add another profile for running the tests in the native image. You can find and example of this in profile `graalvm-native` of this [pom.xml](powertools-common/pom.xml).
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2. **Generate Reachability Metadata**
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- Set the `JAVA_HOME` environment variable to use GraalVM
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- Run tests with `-Pgenerate-graalvm-files` profile.
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```shell
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mvn -Pgenerate-graalvm-files clean test
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```
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3. **Validate Native Image Tests**
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- Set the `JAVA_HOME` environment variable to use GraalVM
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- Run tests with `-Pgraalvm-native` profile. This will build a GraalVM native image and run the JUnit tests.
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```shell
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mvn -Pgraalvm-native clean test
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```
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4. **Clean Up Metadata**
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- GraalVM metadata reachability files generated in Step 2 contains references to the test scoped dependencies as well.
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- Remove the references in generated metadata files for the following (and any other references to test scoped resources and classes):
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- JUnit
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- Mockito
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- ByteBuddy
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## Known Issues and Solutions
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1. **Mockito Compatibility**
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- Powertools uses Mockito 5.x which uses “inline mock maker” as the default. This mock maker does not play well with GraalVM. Mockito [recommends](https://github.com/mockito/mockito/releases/tag/v5.0.0) using subclass mock maker with GraalVM. Therefore `generate-graalvm-files` profile uses subclass mock maker instead of inline mock maker.
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- Subclass mock maker does not support testing static methods. Tests have therefore been modified to use [JUnit Pioneer](https://junit-pioneer.org/docs/environment-variables/) to inject the environment variables in the scope of the test's execution.
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2. **Log4j Compatibility**
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- Version 2.22.1 fails with this error
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```
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java.lang.InternalError: com.oracle.svm.core.jdk.UnsupportedFeatureError: Defining hidden classes at runtime is not supported.
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```
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- This has been [fixed](https://github.com/apache/logging-log4j2/discussions/2364#discussioncomment-8950077) in Log4j 2.24.x. PT has been updated to use this version of Log4j
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## Reference Implementation
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Working example is available in the [examples](examples/powertools-examples-core-utilities/sam-graalvm).

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