Gradle: Set java target level in cookiecutter and docs

[michaelbrewer]

What were you trying to accomplish?

Building the gradle project using jdk 17

Expected Behavior

Project should compile with target level of java 11 or java 1.8

Current Behavior

Sam template example fails

Running JavaGradleWorkflow:GradleBuild

Build Failed
Error: JavaGradleWorkflow:GradleBuild - Gradle Failed: [error] target level should be in '1.1'...'1.8','9'...'16' (or '5.0'..'16.0') or cldc1.1: 17

Possible Solution

Update gradle example

plugins{
    id 'java'
    id 'io.freefair.aspectj.post-compile-weaving' version '6.3.0'
}

repositories {
    mavenCentral()
}

dependencies {
    aspect 'software.amazon.lambda:powertools-logging:1.10.2'
    aspect 'software.amazon.lambda:powertools-tracing:1.10.2'
    aspect 'software.amazon.lambda:powertools-metrics:1.10.2'

    implementation 'com.amazonaws:aws-lambda-java-core:1.2.1'
    implementation 'com.amazonaws:aws-lambda-java-events:3.11.0'

    implementation 'org.apache.logging.log4j:log4j-api:2.17.1'
    implementation 'org.apache.logging.log4j:log4j-core:2.17.1'

    testImplementation 'junit:junit:4.13.2'
}

sourceCompatibility = 11
targetCompatibility = 11

Steps to Reproduce (for bugs)

1. sam init --location gh:aws-samples/cookiecutter-aws-sam-powertools-java
2. Select gradle and java11 (with java 17 installed locally)
3. run sam build

Environment

• Powertools version used: 1.10.2
• Packaging format (Layers, Maven/Gradle): Gradle
• AWS Lambda function runtime: Java 11 (or Java 1.8)

[pankajagrawal16]

Thanks for spotting and fixing the docs and config @michaelbrewer

[michaelbrewer]

hopefully java 17 runtime is coming out soon :)