This is a project for a proof of concept using the Ads Java client library in Google App Engine to create a web application that serves as a playground for AdWords API developers. To use the playground, users need to authenticate using OAuth 2.0 and authorize the application to make calls to the AdWords API on the user's behalf.

The project is structured to use Maven and should be built and run using the Maven Google App Engine Plugin.

If you don't have Maven, you can get it here: http://maven.apache.org/download.html

The rest of the dependencies will be automatically pulled in using Maven but you can examine and modify them through the project's pom.xml if you wish.

To build and run the project locally, follow these steps:

1. Fill in your client ID, client secret, client customer ID and developer token in src/main/webapp/WEB-INF/appengine-web.xml You can create the client ID and secret in the API console (https://code.google.com/apis/console#access) using the redirect URI below:

   http://localhost:8080/oauth2callback https://localhost:8080/oauth2callback

2. Run the following Maven command to download the dependencies and compile the project:

   $ mvn compile

3. Build the war and run the project:

   $ mvn appengine:devserver

4. The playground should be running at: http://localhost:8080/

1. Create an App Engine application at https://appengine.google.com/.

2. Follow steps 1 and 2 from above. In step 1, instead of localhost, you will need to add a redirect URI that corresponds to the application ID of your newly created App Engine application:

   http://APP_ID.appspot.com/oauth2callback https://APP_ID.appspot.com/oauth2callback

3. Replace the application ID in src/main/webapp/WEB-INF/appengine-web.xml with your App Engine application ID

4. Run the following (you will be prompted for your username and password):

   $ mvn appengine:update