Download the SDK

The latest App Engine SDKs allow you to deploy applications to managed VMs. Download the SDK for your language:

Google App Engine SDK for Python
Google App Engine SDK for Go
Google App Engine SDK for Java

Special Instructions for Java Developers

Before you can run or deploy a Java app, you must compile the source code. Use your preferred Java tooling to generate a WAR file.

Special Instructions for Go Developers

Before you begin writing code:

• We recommend that you include a GOPATH environment variable in your set up. It makes the go get command much more useful. Many Go developers include this command in their .bashrc files:

  export GOPATH=$HOME/go

• You must retrieve the open source managed VM tooling that goes with the SDK. Run this command:

  <path_to_go_sdk>/goapp get google.golang.org/appengine

• Check your appengine import statements; you should not use relative paths. Change appengine to google.golang.org/appengine , appengine/datastore to google.golang.org/appengine/datastore , and so forth.

Developing locally

You can test your Java code on your local machine. At this time, the Python and Go SDKs do not include a local development server that can run VM-enabled applications. You must deploy your Python and Go apps to test them.

<java_sdk_path>/dev_appserver.py <project-WAR-directory>

Deploying to production

Use the update command to deploy your application to the Google Cloud Platform.

<python_sdk_path>appcfg.py -s preview.appengine.google.com update <project-directory>

<go_sdk_path>appcfg.py -s preview.appengine.google.com update <project-directory>

<java_sdk_path>appcfg.sh -s preview.appengine.google.com update <EAR-or-WAR-directory>

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