Java 7 runtime support on App Engine standard was deprecated on December 13, 2017 and will be shut down entirely on January 16, 2019. It is replaced by the Java 8 Runtime Environment.

Samples for the Java 8 runtime can be found here.

This directory contains a project that implements a realtime two-player game of Tic Tac Toe on Google App Engine Standard, using the Firebase database for realtime notifications when the board changes.

• Install Apache Maven 3.0.5 or later
• Create a project in the Firebase Console
• Download and install the Cloud SDK

Initialize the gcloud configuration to use your new project:

   gcloud init

• In the Overview section of the Firebase console, click 'Add Firebase to your web app' and replace the contents of the file src/main/webapp/WEB-INF/view/firebase_config.jspf with that code snippet.
• Enable the Identity API
• If you haven't already, Create an App Engine app within the current Google Cloud Project

    gcloud app create

• Setup Application Default Credentials to run your application locally: Download service account credentials and set the GOOGLE_APPLICATION_CREDENTIALS environment variable to its path:

   export GOOGLE_APPLICATION_CREDENTIALS=/path/to/your/credentials.json

$ mvn appengine:run

When running locally, the page does not automatically refresh, please reload the page manually after each move.

$ mvn appengine:deploy

See CONTRIBUTING.md.

See LICENSE.