WCF Data Services for OBA & Mobile Development

UPI, March 13, 2010

Andri Yadi | a@dycode.comCEO, DyCode | Microsoft MVP

http://geeks.netindonesia.net/blogs/andriyadi

Cloud Computing

SOAP/WS-*?

SOAP arguably are:

• Complex

• Slow

• Heavyweight

• Tied to development tools and libraries

• Not supported universally

• Cross-vendor/platform interoperability NOT perfect

REST?REpresentational State Transfer

REST!= Protocol!= Standard!= Format

REST == Architectural Stylefor connecting distributed applications

REST

• Server-side resources identified by URI

• Access resources over HTTP:

• Returned data is “plain”: Atom, plain-XML or JSON

POST Create INSERT

GET Retrieve SELECT

PUT Update UPDATE

DELETE Delete DELETE

Client

Server

Resources

Resource 1

Resource 2

URL

VERB (GET, POST, PUT, DELETE)

Representation

Status

Representation

XML JSON

XML JSON

ODataOpen Data Protocol = REST + AtomPub +

Modeling + URI Semantics

An open web protocol for querying and updating data, applies web technologies such as HTTP, Atom Publishing Protocol (AtomPub) and JSON to provide access to

information from varying sources

WCF Data Services

SQL Server 2008 Reporting Services

Data Services Client

HTTP(Open Data Protocol)

Windows Azure Table Storage

WCF Data Services

WCF Data Services

== Astoria== ADO.NET Data Services

WCF Data ServicesA RESTFul implementation for data-centric

services

Hosting/HTTP Listener

Data Services Runtime

Data Access Layer

Relational Database

EntityFramework

Custom LINQ Provider

HT

TP

Open Data Protocol (OData)

Other Sources

Hosting/HTTP Listener

Data Services Runtime

Data Access Layer

SQL Server

EntityFramework

HT

TP

http://localhost:1234/MyData.svc/MyEntities(10)

var q = from e in MyEntities where id = 10 select e;

SELECT * FROM MyEntity WHERE id = 10

Demo

WCF Data Services

Data Services Client

HTTP(Open Data Protocol)

Resources

• OData web site: http://odata.org

• Astoria team blog: http://blogs.msdn.com/astoriateam

• MSDN: http://msdn.microsoft.com/data

• Visualizer: In Visual Studio 2010 Tools > Extension Manager > Search > “open data protocol”

• iPhone developer portal: http://developer.apple.com/iphone

Q&A

DyCodewww.dycode.com | office@dycode.comDynamic IT Solutions for Optimal Business Value