Docs: Add example on how to add dependencies for Java · apache/openwhisk#2942

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説明

It would be good is the Java section at least shows one way to build the jar using external dependencies.

Since we all in OpenWhisk are fans of gradle 🙄 maybe we can do one using gradle.

Here is a good example from @rabbah https://github.com/rabbah/wsk-qr/blob/master/build.gradle


apply plugin: 'java'

version = '1.0'

repositories {
    mavenCentral()
}

configurations {
    provided
    compile.extendsFrom provided
}

dependencies {
    provided 'com.google.code.gson:gson:2.6.2'
    compile 'com.google.zxing:core:3.3.0'
    compile 'com.google.zxing:javase:3.3.0'
}

jar {
    dependsOn configurations.runtime

    from {
        (configurations.runtime - configurations.provided).collect {
            it.isDirectory() ? it : zipTree(it)
        }
    }
}

then build jar for Action

gradle jar

コントリビューターガイド

技術スタック: java
領域: documentation
Issue 種別: documentation
難度: 2
推定時間: 1-3 hours
活動状況: stale
明確さ: clear
前提条件: JavaGradle
初心者向け度: 80
調査方針: The issue suggests adding a Gradle build example for Java actions in the OpenWhisk documentation. Look at the existing Java section in the docs (likely in the repository's docs folder). The provided example from @rabbah builds a jar with dependencies. Check if the current OpenWhisk Java API supports that build method and if there are any changes. Update the docs with the example and explanation. No linked PRs or comments; the issue is straightforward.