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

• Install the Google Cloud SDK

• Create a project in the Firebase Console

• 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.

• If using the development appserver to run the app locally, you must supply credentials that would otherwise be inferred from the App Engine environment. Download service account credentials and set the GOOGLE_APPLICATION_CREDENTIALS environment variable to its path:

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

• To run the app locally using the development appserver:

  $ mvn appengine:run

• If you see the error Google Cloud SDK path was not provided ...:

  • Make sure you've installed the Google Cloud SDK

  • Make sure the Google Cloud SDK's bin/ directory is in your PATH. If you prefer it not to be, you can also set the environment variable GOOGLE_CLOUD_SDK_HOME to point to where you installed the SDK:

    export GOOGLE_CLOUD_SDK_HOME=/path/to/google-cloud-sdk

See CONTRIBUTING.md.

See LICENSE.