Java App Engine Google Action Endpoint

Project template to use a Java App Engine as endpoint for Google actions.

Features

• Google Actions Framework to manage requests and responses directly from Google or via DialogFlow
• Google Actions Api v2
• DialogFlow end point (v1 and v2 support)
• Account linking Framework implementing implicit flow and authorization code flow

Requirements

• Java 7
• Maven (at least 3.3.9)
• Google Cloud SDK (aka gcloud)

Initialize the Google Cloud SDK using:

gcloud init

This skeleton is ready to run.

Maven

Run Locally

mvn appengine:run

Deploy

mvn appengine:deploy

Test Only

mvn test

What you need to change in this project template

Class AppConfiguration: change the data for your project, assign username and password to DialogFlow so each request is authenticated

You can extend the DFWebhookServletV2 to use DialogFlow v2 API, an example is the DummyDFServletV2.

For account linking you can extend AuthServlet and TokenServlet. You can see examples like DummyAuthServlet and DummyTokenServlet.

In order to use the OAuth2 for account linking you need to generate tokens. There are several ways to generate a token. According to Google docs you can create a json object and the use symmetric encryption or you can simply generate random numbers. In the latter case you need to save the information in the datastore using Objectify.

If you use Objectify you need to implement the method register in the class OfyHelper.