What Is Google App Engine?

# 예제 따라해보았다.
완전 시행착오 많이 하고. Ant 를 Eclipse와 연동해서 build 는 하는데, 이클립스에 이미
Ant가 플러그인되어 있는데 새로 내려받은거와 연동을 해서 혼선이 있었다.
 SDK 다 내려받고, web.xml 만들고 경로 연동에서 잘 해주어야 한다.
Ant  빌드파일 생성 시 <property name="sdk.dir" location="../appengine-java-sdk-1.4.3" /> 라고 있는데, 
실제 appengine 경로에 연결을 잘 해야 한다. 소스만 보고 따라하면 안됨.
이클립스에서 실행이 안되서(나의 설정잘못이겟지만. 아무튼.), 도스창으로 들어가서
> ant runserver 를 실행하고 나서야 웹페이지에서 확인할 수 있었다.
ant 를 도스창에서 사용할면 환경변수에 ANT_HOME 과 Path에 %ANT_HOME%/bin 을 잊지마라.
Google App Engine lets you run your web applications on Google's infrastructure. App Engine applications are easy to build, easy to maintain, and easy to scale as your traffic and data storage needs grow. With App Engine, there are no servers to maintain: You just upload your application, and it's ready to serve your users.

You can serve your app from your own domain name (such as http://www.example.com/) using Google Apps. Or, you can serve your app using a free name on the appspot.com domain. You can share your application with the world, or limit access to members of your organization.

Google App Engine supports apps written in several programming languages. With App Engine's Java runtime environment, you can build your app using standard Java technologies, including the JVM, Java servlets, and the Java programming language—or any other language using a JVM-based interpreter or compiler, such as JavaScript or Ruby. App Engine also features a dedicated Python runtime environment, which includes a fast Python interpreter and the Python standard library. The Java and Python runtime environments are built to ensure that your application runs quickly, securely, and without interference from other apps on the system.

With App Engine, you only pay for what you use. There are no set-up costs and no recurring fees. The resources your application uses, such as storage and bandwidth, are measured by the gigabyte, and billed at competitive rates. You control the maximum amounts of resources your app can consume, so it always stays within your budget.

App Engine costs nothing to get started. All applications can use up to 500 MB of storage and enough CPU and bandwidth to support an efficient app serving around 5 million page views a month, absolutely free. When you enable billing for your application, your free limits are raised, and you only pay for resources you use above the free levels.

Getting Started

• What Is Google App Engine?
• Java
  • Introduction
  • Installing the Java SDK
  • Creating a Project
  • Using the Users Service
  • Using JSPs
  • Using the Datastore with JDO
  • Using Static Files
  • Uploading Your Application

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