Sean SullivanSAO cloud computing event

September 17, 2009

Google App Engine

Run your web apps

on Google’s infrastructure

source: nytimes.com (June 8 2006)

Google datacenterThe Dalles, Oregon

Infrastructure as a Service

Platform as a Service

Software as a Service

http://code.google.com/appengine/

Pricing and quotas

• free to start

• pay as you go

• billable resources

• quotas

Billable resources

• Requests

• Datastore

• Mail

• URL Fetch

• XMPP

• Image manipulation

• Memcache

• Deployments

source: google.com

April 2008

April 2009

• Memcache

• URL Fetch

• Mail

• Images

• Data Store

• Google Accounts

• Task Queue

• XMPP

• Google provides JVM and servlet container

• Java 6 JRE

• Servlet 2.5 API

• whitelisted classes

on

Other JVM languages:

on

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source: infoq.com

App Engine Java API’s

• com.google.appengine.api.memcache

• com.google.appengine.api.urlfetch

• com.google.appengine.api.users

• com.google.appengine.api.xmpp

App Engine Java API’s

• com.google.appengine.api.images

• com.google.appengine.api.labs.taskqueue

• com.google.appengine.api.mail

• com.google.appengine.api.datastore

Datastore programming

Supported:

• JPA

• JDO

• Google datastore API

Not supported:

• JDBC

• SQL

App Engine limitations

• HTTP and HTTPS

• HTTP requests limited to 30 seconds

• no server push

• no long-running background processes

• no threads

App Engine dashboard

App Engine dashboard

Demo

Telephony in the cloud

http://www.twilio.com

Telephony in the cloud

http://code.google.com/p/twilio-java-client

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Questions?

Thank you