News In Wcf40

News in WCF 4.0
Iaşi, 20 februarie 2010
Florin Cardaşim, www.rms.ro

Agenda

Simplified Configuration
It’s easier to get started with WCF 4.0
Default endpoints, binding configurations, behavior configurations
Hosting in IIS without .svc file
… but for scenarios other than “common” WCF configuration is still a non-trivial task
DEMO

Service Discovery
WS-* WS-ServiceDiscovery
SOAP-based protocol for dynamically discovering the location of service endpoints at runtime
Adhocmode
Direct client-service multicast messages over UDP
Managed mode
A discovery proxy “manages” the discoverable service endpoints

Adhoc Service Discovery
Multicast UDP messages
Search based on criteria (ex: contract name, version etc)
Services answer directly
Services may “announce” online/offline
ONLY on local subnet
UDP multicast
Client
Services
search answer
Client
Services
Clients
Services
announce online/offline

Demo: “Basic”
Server: ServiceDiscoveryBehavior, UdpDiscoveryEndpoint
Client: DynamicEndpoint
UdpDiscoveryEndpoint
ICalculatorService
net.tcp://…/CalculatorService/Guid
Client
Service

Demo: “AsyncFind”
Server: ServiceDiscoveryBehavior, UdpDiscoveryEndpoint
Client: DiscoveryClient, FindCriteria
asynchronously
UdpDiscoveryEndpoint
ICalculatorService
Client
Service

Demo: “Announcements”
AnnouncementService
Server: ServiceDiscoveryBehavior, UdpAnnouncementEndpoint
Client: AnnouncementService, UdpAnnouncementEndpoint
See also the “Configuration” sample
Client
UdpAnnouncementEndpoint
Service
CalculatorProxy
ICalculatorService

Demo: “Mex Explorer”
Juval Lowy, IDesign.Net
A wonderfull WCF book: “Programming WCF Services”

Managed Service Discovery
Services “announce” Disco Proxy
Clients “ask” Disco Proxy
More flexible, reduces multicasts traffic
Client
Services
Client
Services
Discovery Proxy
Clients
Services
answer
search
announce online/offline

Demo: “DiscoveryProxy”
AnnouncementEndpoint
net.tcp://localhost:9021/Announcement
DiscoveryProxy: DiscoveryProxy, DiscoveryEndpoint, AnnouncementEndpoint
Service: ServiceDescoveryBehavior, AnnouncementEndpoint
Client: DiscoveryClient, DiscoveryEndpoint
DiscoveryEndpoint
net.tcp://localhost:8001/Probe
DiscoveryProxy
ICalculatorService
Client
Service

REST Improvements
Automatic Help Page
HTTP Caching Support
Error handling enhancements
WebFaultException, WebFaultException<T>
Various API enhancements
Until now CodePlex “Rest Starter Kit”
Now in .NET 4.0

Demo: “BasicHttpService”
Automatic Help Page
helpEnabled = true - default
http://localhost:8000/help

Demo: “AspNetCachingIntegration”
HTTP Caching Support

Demo: Error handling
WebFaultException, WebFaultException<T>

Routing Service
When do we need a routing service?
Centralized security boundary
Load balancing
Protocol bridging
Content based routing for licensing, prioritization, versioning etc
Routing Service
One-way
Request-reply
Duplex
Services
Client
Services
Client
Services
Clients

Routing Service
Supported communication patterns
Filters

Demo: “HelloRoutingService”
IMetadataExchangeEP
Client connects to RouterService
Calls are routed to ICalculatorEP based on the MatchAll filter
The routing service has a proxy to the CalculatorService
IRequestReplyRouterEP
IMetadataExchangeEP
RoutingService
Client
CalculatorService
ICalculatorEP
Internal Proxy

Demo: RouterBridgingAndErrorHandling
Client connects to RouterService via HTTP
Calls are routed to deadDestination based on the MatchAll filter
deadDestination is not reachable so go to realDestination
deadDestination
IRequestReplyRouterEP
RoutingService
HTTP
Client
Internal Proxy
realDestination
CalculatorService
TCP

References
MSDN article by Aaron Skonnard, Pluralsight.com
Articles by Michele Bustamante, dasblonde.net
Articles by Juval Lowy, IDesign.net
Channel9
Ed Pinto at PDC 2009, microsoftpdc.com/
VS2010 Training Kit
Get Visual Studio 2010 RC now and play with it!

Please fill the evaluation form !!!
Thank you very much
Florin Cardasim
florin.cardasim@rms.ro
www.rms.ro
www.codecamp.ro
www.Twitter.com/cardasim

News In Wcf40

by Florin Cardasim on Feb 24, 2010

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News In Wcf40 — Presentation Transcript