This sample demonstrates how to use Google Cloud Spanner from Google App Engine standard environment.

• Install the Google Cloud SDK and run:

   gcloud init

If this is your first time creating an App engine application:

   gcloud app create

• Create a Spanner instance.

• Update SPANNER_INSTANCE value in `appengine-web.xml.

• /spanner : will run sample operations against the spanner instance in order. Individual tasks can be run using the task query parameter. See SpannerTasks for supported set of tasks. Note : by default all the spanner example operations run in order, this operation may take a while to return.

• Authorize the local application:

   gcloud auth application-default login

You may also create and use service account credentials.

• App Engine Maven plugins do not work correctly for this sample for local testing. Here is the tracking issue. As a workaround to run locally, this sample uses the Maven Jetty plugin.

   mvn -DSPANNER_INSTANCE=my-spanner-instance jetty:run

To see the results of the local application, open http://localhost:8080/spanner in a web browser. Note : by default all the spanner example operations run in order, this operation may take a while to show results.

$ mvn clean package appengine:deploy

To see the results of the deployed sample application, open https://spanner-dot-PROJECTID.appspot.com/spanner in a web browser. Note : by default all the spanner example operations run in order, this operation may take a while to show results.