Google App Engine Tutorial

Google App Engine, a cloud computing platform for hosting web application in existing Google infrastructure, it’s easy to scale, manage and free to use up to a predefined consumed resources, and it supports Java. For additional charged, please refer to this GAE billing .

In this series of tutorials, we will show you a list of tutorials to get you start program Google App Engine using Java.

1. Quick Start

Say hello to Google App Engine.

• Google App Engine + Java hello world example using Eclipse
  GAE + Eclipse + Java hello world example.
• Google App Engine + Python hello world example using Eclipse
  GAE + Eclipse + PyDev + Python web hello world example.
• GAE + Python hello world on Mac OS X
  GAE + Python web hello world example, using GAE launcher.

2. GAE + Struts 1 & 2

Struts 1 & 2 framework integration and some common errors you may hit.

• Google App Engine + Struts 1.x example
  Integrate classic Struts 1.x framework with Google App Engine.
• Google App Engine + Struts 2 example
  Integrate Struts 2 framework with Google App Engine.
• Struts 2 on GAE – Error: result ‘null’ not found
• Struts 2 on GAE – java.security.AccessControlException: access denied
• javax.swing.tree.TreeNode is a restricted class

3. GAE + JSF 2

JSF 2 framework integration and some common errors you may hit.

• Google App Engine + JSF 2 example
  Integrate JSF 2 framework with Google App Engine.
• Unable to instantiate ExpressionFactory ‘com.sun.el.ExpressionFactoryImpl’
• View /hello.xhtml could not be restored
• javax.naming.InitialContext is a restricted class

4. GAE + Spring

Spring framework integration.

• Google App Engine + Spring 3 MVC REST example
  Integrate Spring MVC framework with Google App Engine.

5. Datastore

In GAE for Java, you can store data in “datastore”, via datastore low-level api, JDO or JPA. In this example, we will use Spring MVC for demonstration.

• Google App Engine + Spring MVC, CRUD example with datastore low level api
• Google App Engine + JDO + Spring MVC, CRUD example

6. FAQs

Some common asked questions in Google App Engine.

• Cron job on Google App Engine for Java
  Create “cron.xml” and put it in “WEB-INF” folder.
• GAE + Java – Integrating Google user account
  Example to use userService to integrate Google user account in GAE + Java project.
• Configure logging in Google App Engine
  Logging with java.util.logging.Logger
• Download / export Google App Engine Logs, Java App
  AppCfg request_logs to download logs from GAE.
• Download uploaded application from Google App Engine
  AppCfg download_app to download uploaded application from GAE.
• Your project must be configured to use a JDK in order to use JSPs
• How to install Google Plugin for Eclipse
  Steps to show guide you install “Google Plugin for Eclipse” in Eclipse 3.7
• Google Plugin for Eclipse – jar has been tampered!
• GAE : how to output log messages to a file
  Output log message to a file, instead of log console.

References

1. GAE : Getting start with Java
2. GAE billing
3. GAE codelab
4. GAE white-listed Jars
5. Google App Engine Wikipedia