Atom Services And Frameworks

Service Interfaces

Atom & AtomPub

Atom-Enabled Data Services

Drill Down: Windows Live Spaces Photos

Data Services Framework

Wrap-up

Operation-centric vs data-centric interface style depending on the nature of the service

Data Centric

Spaces Photos, …

Application-Based Storage

SQL Data Services

…

Operations Centric

Messenger

Live ID

Alerts

…

Existing interfaces work well New Atom interfaces

Consumer Services

e.g.:

Windows Live Spaces (Photos)

Infrastructure Services

e.g.:

Application- Based Storage

SQL Server Data Services

On-Premises Services

e.g.:

Data Services framework against local SQL Server

AtomPub Unified Development Story Visual Studio .NET and Silverlight 2 ASP.NET Integration AJAX library 3 rd party components

IETF RFC 4287

XML format

Organized in feeds , entries and links

Extensible data and metadata

< feed xmlns ="…/Atom"> < id >…/Folders</ id > < title >Folders</ title > < updated >…</ updated > < author > < name >John Doe</ name > </ author > < entry > < id >…/Folders(123)</ id > < title >Cool Pics</ title > < updated >…</ updated > < link rel ="self" … /> < link rel ="related" … /> < content type ="app/xml"> < … content … > </ content > </ entry > </ feed >

IETF RFC 5023

Protocol for publishing and editing resources

Atom representations over HTTP

Simple RESTful interaction model

GET Server w/ AtomPub interface

Photos is part of Windows Live Spaces

New experimental AtomPub interface

https://cumulus.services.live.com/{id}/AtomSpacesPhotos

Authorization via LiveID

More information at http://dev.live.com/liveid

Browse and create folders and photos

Folders/Photos as Atom feeds and entries

Photos are Atom “media link entries”

AtomPub does not specify URL format

We follow a predictable, uniform pattern

Description Example URL Top-level container /Folders Address single entry by ID /Folders(123) Traverse a link /Folders(123)/Photos Addressing can nest as appropriate /Folders(123)/Photos(456)/ImageStreams Access primary value /Folders(123)/Photos(456)/$value Presentation control ** $orderby, $filter, $top, $skip, $expand Service metadata /$metadata

aka “Project Astoria”

Rich framework for data services

Consume existing services

Expose your own data as a service

Model-driven, uses the Entity Data Model

Follows the same patterns as Live services

Same HTTP AtomPub-based interface

ADO.NET Data Services tools apply across all data services

.NET & Silverlight libraries

Object-based API, LINQ query support

ASP.NET integration

AJAX library

Tools driven by Entity Data model

3 rd party control vendors for even richer toolbox

ADO.NET Data Services Framework

Data-centric services

AtomPub interface

‘ Astoria’ conventions

Various data sources

Online or on-premises

Data Access Layer Entity Framework Custom LINQ provider Relational database Other sources Service Runtime Hosting/HTTP listener HTTP IQueryable [+ IUpdatable]

Service alignment

We’re aligning our services on AtomPub

First experimental interfaces available

Windows Live Spaces Photos

Application-Based Storage (experimental service)

SQL Server Data Services (soon)

Your own services can follow the same interface

Rich developer story

Unified conventions for URLs and data model

Growing tools/components ecosystem

Try this out and give us feedback!

Sessions

RESTful Data Services with the ADO.NET Data Services Framework

Developing with Windows Live

Introducing SQL Server Data Services

Using the Microsoft Sync Framework and FeedSync

Building RESTful Real World Applications with the ADO.NET Data Services Framework

Also check out the hands-on labs!

Windows Live APIs

http://dev.live.com

ADO.NET Data Services Framework

http://astoria.mslivelabs.com

http://blogs.msdn.com/astoriateam

AtomPub

http://atomenabled.org

Contact me

http://blogs.msdn.com/pablo

[email_address]

© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries. The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.