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Networking and Web Services in Silverlight Yavor Georgiev Program Manager Microsoft Corporation CL06
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Transcript of > “Forms over data” E2E business app WCF RIA Services.
Networking and Web Services in Silverlight
Yavor GeorgievProgram ManagerMicrosoft Corporation
CL06
Getting Data Into Silverlight Interaction M
odelMes
sage
Pat
tern
Multicast
Duplex
Request/reply
Resourcecentric
Operationcentric
Data Access Examples
> “Forms over data” E2E business app
> Access data from third-party REST service
> Access your database or SharePoint data model using REST
> App which accesses server business logic
> Chat app
> Streamed data (video, stock prices) inside an intranet
Interaction Model
Mes
sage
Pat
tern
Resource-Centric Apps
Multicast
Duplex
Request/reply
Resourcecentric
Operationcentric
> “Forms over data” E2E business app
WCF RIA ServicesSystem.Web.DomainServices
> “Forms over data” E2E business app> Prescriptive model for CRUD services> Great tooling to maximize productivity> E2E data: sorting, paging, filtering,
validation…> RIA Services now built on top of WCF
> Productivity of RIA Services> Power and flexibility of WCF
> To learn more tomorrow:> CL21 @ 11:30AM - Building Amazing
Business Applications with Silverlight and .NET RIA Services
> CL07 @ 1:45PM - Mastering .NET RIA Services
WCF RIA Services
Interaction Model
Mes
sage
Pat
tern
Resource-Centric Apps
Multicast
Duplex
Request/reply
Resourcecentric
Operationcentric
Travel Agent App
demo
Interaction Model
Mes
sage
Pat
tern
Resource-Centric Apps
Multicast
Duplex
Request/reply
Resourcecentric
Operationcentric
> Access data from third-party REST service> Access your database or SharePoint data model
using REST
Accessing Public REST ServicesSystem.Net
> ClientHttp networking stack> Integrated with the OS networking stack> Supports common BrowserHttp stack
features for consistent experience> Better RESTful protocol support for
same and cross-domain scenarios> All HTTP verbs supported> Response bodies available for all HTTP
status codes> Authentication & cookies support
ClientHttp Stack FeaturesBrowserHttp Stack
ClientHttp Stack
Basic Authentication
Handled by browser No [SL3] Yes
Caching Handled by browser Not supported
Concurrent Connections
Handled by browser 6
Cookies Handled by browser Handled by app
Cross-domain Support
Need policy file Need file policy file [SL3] Not needed if elevated
Digest Authentication
Handled by browser No [SL3] Yes
HTTP Verbs GET, POST All (need policy file)
NTLM Auth Handled by browser No [SL3] Yes
Request Headers Only supported on POST
Supported on all verbs
Response Body Only on 200 response Fully supported
Response Headers Not supported Fully supported
Status Codes Only 200/404 Fully supported
Travel Agent App
demo Accessing Public REST Services
Access a Data Model Using RESTSystem.Data.Services
> WCF Data Services> Formerly ADO.NET Data Services> Services with a RESTful interface and a
set of conventions designed for easy data sharing
> What is Data Services?> Server framework for .NET, others coming > Clients for Silverlight, .NET, PHP, Java,
AJAX> SharePoint 2010 uses a Data Service to
expose data
Data Services Client
> Accessing Data Services> Silverlight ClientHttp stack still an option> Data Services client more usable as it
knows the details of the data service interface
> Features> Full abstraction on top of the service – no
need to deal with HTTP, serialization, etc> Data as objects with automatic change
tracking> LINQ for queries> Data-binding friendly interfaces> Work same-domain and cross-domain
Travel Agent App
demo Accessing SharePoint Using aData Service
Aside: Windows Communication Foundation
Channel ModelFormats
(Atom, JSON, XML,…)
Transports(HTTP, TCP, …)
Protocols(SOAP, HTTP,
OData)
Service Model
Data ContractService
ContractService Behavior
Programming Model
Core Services
Web HTTP
Services
Data Services
RIA Services
Workflow
Services
Interaction Model
Mes
sage
Pat
tern
Resource-Centric Apps
Multicast
Duplex
Request/reply
Resourcecentric
Operationcentric
System.Net
WCF Data Services
> Access data from third-party REST service> Access your database or SharePoint data model
using REST
Interaction Model
Mes
sage
Pat
tern
Operation-Centric Apps
Multicast
Duplex
Request/reply
Resourcecentric
Operationcentric
> App which accesses server business logic> Chat app> Streamed data (video, stock prices) inside an
intranet
Operation-Centric Apps with WCFSystem.ServiceModel
> Accessing server business logic> Generated proxies (Add Service
Reference)> Serialization of objects on the wire, faults> High-performance encoders> Different security approaches
> Chat scenario> High-level messaging patterns built on
top of networking APIs
Binary Message EncoderServer throughput increase
20 objects 100 objects
6122
2702
7570
4615
HP BL680c: 8 Intel EMT64 [email protected] Server 2008 64-bit, IIS7
Text / HTTP
Message complexity
Web
serv
ice r
eq
uest
s/se
c 24%
71%
Binary Message EncoderMessage size reduction
15%
34%
40%
String IntLarge object graph
Siz
e r
ed
ucti
on
WCF Features
> Faults enabled> System.ServiceModel.CommunicationException
was unhandled by user codeMessage="The remote server returned an error: NotFound."
> To get full exceptions, use ClientHttp stack
> Security in cross-domain scenarios enabled> Normally use browser-managed security
(generally not safe for cross-domain use)> Transport security with message
credentials in cross-domain scenarios
Duplex Messaging (Server Push)
> Server push is compelling when server has to notify client of events (email server)> Internet: PollingDuplex (HTTP-based)
> [Post SL4 Beta] response chunking for better performance
> [Post SL4 Beta] can scale across machines (web farms, Windows Azure) – Invensys case study
> Intranet: NetTcp (TCP sockets-based)> Also works for request/reply services
> Both offer the same programming model – just a matter of changing the binding
Duplex Messaging ScalabilityIntel Xeon 2 [email protected], 2GB RAMWindows Server 2008 32-bit, IIS7
1s 2s 5s 10s 30s0
1000
2000
3000
4000
5000
6000
7000
PollingDuplex
Message broadcast frequency
Maxim
um
clien
ts c
on
necte
d
Travel Agent App
demo Implementing Chat Using Duplex Messaging
Multicast MessagingSystem.Net
> UDP multicast is a technique for one-to-many communication over an IP infrastructure
> Scenarios> Market data streaming> Video and media streaming> Real-time communication> Device and service discovery
UDP Multicast Details
> Scales to a large receiver population> Two key shapes for multicast groups:
> Single Source Multicast (one-to-many)System.Net.Sockets.UdpSingleSourceMulticastClient
> Any Source Multicast (many-to-many)System.Net.Sockets.UdpAnySourceMulticastClient
> Need to expose a policy responder (just like sockets and HTTP)> [Post SL4 Beta] Going away for both
sockets and multicast if app is elevated
WCFSystem.Net
System.Net
Interaction Model
Mes
sage
Pat
tern
Operation-Centric Apps
Multicast
Duplex
Request/reply
Resourcecentric
Operationcentric
> App which accesses server business logic> Chat app> Streamed data (video, stock prices) inside an
intranet
Data Access Examples
> “Forms over data” E2E business app> WCF RIA Services (System.Web.DomainServices )
> Access data from third-party REST service> System.Net
> Access your database or SharePoint data model using REST> WCF Data Services (System.Data.Services)
> App which accesses server business logic> WCF (System.ServiceModel)
> Chat app> WCF (System.ServiceModel)
> Streamed data (video, stock prices) inside an intranet> System.Net
Additional Resources
> Blogs: > http://blogs.msdn.com/astoriateam> http://blogs.msdn.com/matos > http://blogs.msdn.com/ncl> http://blogs.msdn.com/silverlightws
(will have sample code from today)
> E-mail: [email protected]
Related Sessions
> Today> FT12 - ADO.NET Data Services: What’s New with the
RESTful Data Services Framework> FT55 - Developing REST Applications with the .NET
Framework> SVC31 - Lessons Learned: Building On-Premises and
Cloud Applications with the Service Bus and Windows Azure
> Tomorrow> CL21 @ 11:30AM - Building Amazing Business
Applications with Silverlight and.NET RIA Services> CL07 @ 1:45PM - Mastering .NET RIA Services> PR12 @ 1:45PM - It's All about the Services:
Developing Custom Applications for SharePoint Server 2010 Using ASP.NET, WCF, and REST
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© 2009 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.
