Explore the Microsoft Data Stack.

1. Mike Benkovich
mike@benko.com
http://www.benkotips.com
Twitter: @mbenko

2. More info on www.BenkoTIPS.com
 Understand the Microsoft Data Stack
 Explore types of clients and formats
 What are the service options
 Ask the right questions

3. REST
Poco
OData
XML
RIA

4.  Client
 REST & OData
 ATOM
 JSON
 Server
 WCF Data Services
 ADO.NET Entity Framework
 RIA Services

5. More info on www.BenkoTIPS.com
 REST vs ODBC
 Representation StateTransfer
 Addressable resource – i.e. URL
http://northwind.com/data.svc/Customers('ALFKI')
 OData – fka Astoria
 Implementation ofWCF Data Services
 IDataService implementation
 WCF Data Services
 RIA Services
Data

6. More info on www.BenkoTIPS.com
 RESTful implementation of a data source
 URL based addressing scheme to data service
 Implements IDataService interface
 Query constructs
 Preface commands with $ … i.e. $filter $expand
 $skip, $top Server side paging
 $expand Expand related entities
 $filter Apply where clause

7. More info on www.BenkoTIPS.com
 Visit http://odata.org for complete list
 Available sources include:
▪ SharePoint
▪ Facebook Insights
▪ Netflix
▪ Twitter
▪ IBMWeb Sphere
▪ Vancouver Street Parking
▪ Dbpedia
▪ SQL Azure
▪ TwitPic
▪ TechEd 2010
▪ MIX 10
▪ Codename Dallas
▪ Stack Overflow
▪ Server Fault
▪ EBay
▪ + more coming

8. More info on www.BenkoTIPS.com
 Netflix
 http://odata.netflix.com/Catalog/
 http://odata.netflix.com/Catalog/Titles?$skip=5&$top=10
 http://odata.netflix.com/Catalog/Titles('BVcw3')
 http://odata.netflix.com/Catalog/Titles('BVcw3')/Cast
 http://odata.netflix.com/Catalog/People(47249)
 http://odata.netflix.com/Catalog/People(47249)/TitlesActedIn
 http://odata.netflix.com/Catalog/People(47249)/TitlesActedIn/$count
 http://odata.netflix.com/Catalog/People(47249)/Name/$value
 http://odata.netflix.com/Catalog/$metadata
 TechED 2010
 http://odata.msteched.com/sessions.svc/
 http://odata.msteched.com/sessions.svc/Speakers?$filter=SpeakerLastName eq 'Brown‘
 http://odata.msteched.com/sessions.svc/Speakers?$filter=SpeakerLastName eq
'Brown'&$expand=Sessions
 Twitter
 http://api.twitter.com/1/statuses/user_timeline.xml?screen_name=mbenko

10.  Client
 REST & OData
 ATOM
 JSON

11.  Implementation of IDataService
 Expose functions & methods with [WebGet]
public class PocoData : DataService< PresenterData >
{
// This method is called only once to initialize service-wide policies.
public static void InitializeService(DataServiceConfiguration config)
{
config.SetEntitySetAccessRule("*", EntitySetRights.AllRead);
config.SetServiceOperationAccessRule("*", ServiceOperationRights.All);
config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2;
}
}
[WebGet]
public List<string> SayHello()
{
return new List<string>() { "Hello World", "Whee!" };
}

12.  Object modeling layer
 Logical representation of Physical schema
 Create from Database
 Start from scratch

13. More info on www.BenkoTIPS.com
 Part of .NET 4.0 Framework
 Visual Studio 2010 Designer support
 Flexible implementation allows many
approaches
 Generate from Database
 “Model First”
 “Code First”
 Provides “Logical” to “Physical” abstraction

15.  Inheritance
 Table per Hierarchy
 Table perType
 Table per ConcreteType
 Hybrids
 Many entities to one
table
 Stored Procedures
 Many tables to one
entity
 Abstract Entities
 Associations within
EntitySets
 Associations across
EntitySets
 Store-side
discriminators
 EDM-side
discriminators
 QueryViews, Defining
Query, CommandText

16.  REST and OData provide a simple, easy to use way
of addressing data exposed in the real world
 The industry is adopting OData and embracing it in
.NET, AJAX, Silverlight, iPhone, and other emerging
platforms
 WCF Data Services implement the IDataService
interface making it very easy to create and host an
OData service
 ADO.NET Entity Framework provides a
comprehensive platform for building the Data Layer
for n-tier applications

17.  MSDN Data Developer Center:
http://msdn.com/data
 ADO.NETTeam Blog:
http://blogs.msdn.com/adonet
 OData Blog:
http://odata.org/blog
 WCF Data ServicesTeam Blog:
http://blogs.msdn.com/astoriateam
 EF Design Blog:
http://blogs.msdn.com/efdesign
 Data Platform Development Forums:
http://msdn.com/data and click on the “Forums” tab
 Patterns andTestability:
http://bit.ly/learnef4test, http://bit.ly/ef4wpfsample