HelloWorld for App Engine Standard (Java 8)

This sample demonstrates how to deploy an application on Google App Engine.

See the Google App Engine standard environment documentation for more detailed instructions.

Java 8
Maven (at least 3.5)
Gradle (optional)
Google Cloud SDK (aka gcloud)

Setup

• Download and initialize the Cloud SDK

gcloud init

Create an App Engine app within the current Google Cloud Project

gcloud app create

In the pom.xml, update the App Engine Maven Plugin with your Google Cloud Project Id:

<plugin>
  <groupId>com.google.cloud.tools</groupId>
  <artifactId>appengine-maven-plugin</artifactId>
  <version>2.2.0</version>
  <configuration>
    <projectId>myProjectId</projectId>
    <version>GCLOUD_CONFIG</version>
  </configuration>
</plugin>

Note: GCLOUD_CONFIG is a special version for autogenerating an App Engine version. Change this field to specify a specific version name.

Maven

Running locally

mvn package appengine:run

To use vist: http://localhost:8080/

Deploying

mvn package appengine:deploy

To use vist: https://YOUR-PROJECT-ID.appspot.com

Gradle

Running locally

gradle appengineRun

If you do not have gradle installed, you can run using ./gradlew appengineRun.

To use vist: http://localhost:8080/

Deploying

gradle appengineDeploy

If you do not have gradle installed, you can deploy using ./gradlew appengineDeploy.

To use vist: https://YOUR-PROJECT-ID.appspot.com

Testing

mvn verify

or

gradle test

As you add / modify the source code (src/main/java/...) it's very useful to add unit testing to (src/main/test/...). The following resources are quite useful: