What’s New in WCF 4.5?

Richard Blewett

Rock Solid Knowledge Ltd

DEV326

Agenda

The big pictureSimplificationModern communication

The Big Picture

3.0Initial Release

2006

3.5Web Programming

2008

3.5 SP1POCO Support

2009

4.0Simplification and Routing

2010

4.5Simplification

and Communication

2012

Simplification

Configuration simplificationContract firstFlat WSDLNew async model

Configuration Simplification

WCF 4.0 simplified server configDefault endpointsDefault binding configDefault behaviors

WCF 4.5 simplfies client configAdd Service Reference only generates necessary config

Contract First

Implement service based on existing WSDLGood model for interopUseful for integration callbacks – e.g. Salesforce notification

WSDL Svcutil /sc <wsdl>Service

Contract and Data Contracts

Flat WSDL

4.0 WSDL contains schema imports for message definition

Can cause interop problemsSometimes import address isn’t routable

4.5 can generate flat WSDLAll constructs at one Uri

http://<metadata address>?singleWsdl

Task based async

Async always supportedClient uses APM or EAPServer uses APM

4.5 introduces Task based asyncSame pattern client and serverIntegrates with async/await

Async on the Client

Add Service Reference builds Async methods on proxy by default

[ServiceContract]public interface ITweetStats { [OperationContract] int GetTweetCount(string searchTerms); [OperationContract] Task<int> GetTweetCountAsync(string searchTerms);}

Async on server

Far more elegant than APM

[ServiceContract]interface ITweetStats { [OperationContract] Task<int> GetTweetCount(string searchTerms);}

public async Task<int> GetTweetCount(string searchTerms){ // ... HttpWebRequest req = WebRequest.CreateHttp(uri);

WebResponse resp = await req.GetResponseAsync(); // ...}

demo

WCF 4.5 Async Support

Modern Communication

Metro ClientsUDPWebSocketsNetHttpBinding

Metro clients

WCF client side available for Metro applicationsBasicHttpBindingNetTcpBindingNetHttpBinding (more on this shortly)

Proxy tuned for MetroOnly async methodsDuplex methods as events

No config filePartial method ConfigureEndpoint

UDP

RFC 768 – User Datagram ProtocolConnectionlessUnreliableBroadcast

WCF support based on SOAP over UDPhttp://specs.xmlsoap.org/ws/2004/09/soap-over-udp/soap-over-udp.pdfText Encodersoap.udp addressing scheme

demo

UDP Broadcast

Web Sockets

http://www.w3.org/TR/websockets/Port 80 or 443Full duplex over single connection

WCF support Requires Windows 8 / Windows Server 2012Microsoft.WebSockets Nuget package for browser based clients

demo

WebSockets to the Browser

NetHttpBinding

Productionization of the NetHttpBinding SampleBasicHttpBinding with binary encoder

Supports HTTP based duplex over single connectionUses WebSockets for duplexRequires Windows 8 / Windows Server 2012

demo

WebSockets to Metro Client

And more …

Streaming enhancementsConfig intellisense and tooltipsConfig validationRevised quota defaultsMultiple authentication modes in IIS hosting

Conclusion

.NET 4.5 makes WCF development easier

.NET 4.5 makes WCF development richer

Resources

Connect. Share. Discuss.

http://europe.msteched.com

Learning

Microsoft Certification & Training Resources

www.microsoft.com/learning

TechNet

Resources for IT Professionals

http://microsoft.com/technet

Resources for Developers

http://microsoft.com/msdn

Evaluations

http://europe.msteched.com/sessions

Submit your evals online

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