Version updates: App Engine: Qwik Start - Java

[manishchaudhari-ssk]

• Updated the Java version in app.yaml in app-engine-java21 directory
• Buganizer: http://b/393352626

[snippet-bot]

Here is the summary of changes.

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• appengine-java21/helloworld/http-server/src/main/appengine/app.yaml:15, tag gae_java21_runtime

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[code-review-assist]

Hi team,

I'm currently reviewing this pull request and will provide my feedback shortly. In the meantime, here's a summary of the changes for you and other reviewers to get up to speed quickly:

This pull request updates the Java version in the App Engine Qwik Start sample to Java 21. The changes are focused on the appengine-java21/helloworld/http-server directory.

Intent:

The primary goal is to modernize the sample application by using the latest Java version, improving compatibility and potentially leveraging new features.

Changes:

• The app.yaml file was updated to specify runtime: java21. (Line 16 of appengine-java21/helloworld/http-server/src/main/appengine/app.yaml)
• A new README.md file was added to provide instructions for deploying the updated application. (File: appengine-java21/helloworld/http-server/README.md)
• The pom.xml file was updated to reflect the Java 21 runtime. (File: appengine-java21/helloworld/http-server/pom.xml)
• The main application file (Main.java) remains largely unchanged, demonstrating a simple HTTP server. (File: appengine-java21/helloworld/http-server/src/main/java/com/example/appengine/Main.java)

Activity:

The pull request references Buganizer issue http://b/393352626, suggesting this is part of a larger effort to update App Engine samples.

I'll provide a more detailed review shortly. Thanks!

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And now, a little haiku to brighten your day:

Java twenty-one,
Code compiles, a clean deploy,
Happy coding now!

[code-review-assist]

This pull request updates the Java version to Java 21 in the App Engine sample application. The changes include updating app.yaml, adding a pom.xml for Maven build management, and creating a README.md file with instructions. The implementation looks good overall, and the added documentation is helpful. Here are a few minor suggestions:

Summary of Google Java Style Guide elements referenced:

• Comments: Documented using Javadoc style.
• Naming: Used descriptive names for classes and variables.