Introduction

Applications can be developed in Python and Java.

Java Development

You develop and upload Java applications for Google App Engine using the App Engine Java software development kit (SDK). The SDK includes software for a web server that you can run on your own computer to test your Java applications (see #Development_Environment).

App Engine Java applications use the Java Servlet standard for interacting with the web server environment. An application's files, including compiled classes, JARs, static files and configuration files, are arranged in a directory structure using the WAR standard layout for Java web applications.

GAE uses Java 6.

Development Environment

Installation

PlugIn
Path extended to %JAVA_HOME%, to enable call to javac.exe
port change from 8080 to 8090 in C:\Uwes\eclipse\v342\eclipse\plugins\com.google.appengine.eclipse.sdkbundle.1.3.0_1.3.0.v200912141120\appengine-java-sdk-1.3.0\config\user\ant-macros.xml

Eclipse Plugin

see plugins/com.google.appengine.eclipse.sdkbundle_VERSION/

Java Development Server

The App Engine Java SDK includes a development web server for testing your application on your computer. The server simulates all of the App Engine services, including a local version of the datastore, Google Accounts, and the ability to fetch URLs and send email from your computer using the App Engine APIs. The Google Plugin for Eclipse can run the server in the Eclipse debugger or you can run it from the command line.

Test

Demos

C:\Uwes\eclipse\v342\eclipse\plugins\com.google.appengine.eclipse.sdkbundle.1.3.0_1.3.0.v200912141120>appengine-java-sdk-1.3.0\bin\dev_appserver.cmd --port=8090 appengine-java-sdk-1.3.0\demos\guestbook\war