WCf foundation

8/14/2019 WCf foundation

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Agenda

What Is the WindowsCommunication Foundation?

How Does It Work? How Do I Use and Deploy It? Bindings Addresses Contracts How to host WCF services in ASP.NET How WCF works inside of ASP.NET


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WCF is

Our next-generation platform for distributed systems

A set of extensions to the Microsoft.NET Framework 2.0

Build WCF services in Visual Studio 2005 using any .NET

Language Intelligent code editing, IDE Extensions for WCF, debugging, re-

factoring, code snippets, etc.

Visual Basic .NET, Visual C#, etc.

Runs on

Microsoft Windows Vista Microsoft Windows XP

Microsoft Windows Server 2003


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.NET at the core

The Unified

Framework ForRapidly Building

Service-Oriented

Applications


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Windows CommunicationFoundation

Unifies todays distributed technologies Lets you develop/deploy/manage one

model

Visual Studio 2005 integration

Broad support for Web services(WS-*) specifications

Compatible with existing Microsoft-

distributed application technologies

Enables development ofloosely-coupled services

Config-based communication


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Unified Programming

Model

InteropInteropwith otherwith otherplatformsplatforms

ASMX

Attribute-Attribute-

BasedBasedProgrammingProgramming

EnterpriseServices

WS-*WS-*ProtocolProtocolSupportSupport

WSE

Message-Message-

OrientedOrientedProgrammingProgramming

System.Messaging

ExtensibilityExtensibilityLocationLocation

transparencytransparency

.NETRemoting


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Agenda

What Is the Windows CommunicationFoundation?



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How does it work?Endpoints

ClientClient ServiceService

MessageMessageEndpointEndpoint EndpointEndpoint

EndpointEndpoint


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How does it work?Address, Binding, Contract


MessageMessageAABBCC AA BB CC

AA BB CC

AddressAddress BindingBinding ContractContract

(Where)(Where) (How)(How) (What)(What)


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How does it work?Behaviours and Metadata


MessageMessageAABBCC AA BB CC

AA BB CC

MetadataMetadata

BvBv BvBv

BvBv BvBv

ProxyProxy ServiceHost()ServiceHost()


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Agenda




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How do I use it?

ClientClient

ServiceService


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How do I deploy it?

For HTTP services on Windows XP SP2 & WS2K3 For any service on Windows Vista and Windows Server

Longhorn

Proven reliability, scalability, and security Requires a .svc file to identify the Service Type

Web Host within IIS:

Self-Host within any .NET process:

Available for any service Console apps, windowed apps, .NET NT Services


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Agenda




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All About BindingsYou can choose a pre-defined binding:

NetPeerTcpBinding

NetMSMQBinding

NetNamePipesBinding

NetTcpBinding

WsHttpBinding

BasicHttpBinding

Binding

.NET Peer Peer

.NET.NET via MSMQ

.NET.NET across processesSecure, reliable duplexed

.NET.NET across processesSecure, reliable duplexed

Basis for WS-* interopSupports WS-Security, WS-RM, WS-Tx

Basic Profile 1.1 Interop and Intergration w/ASMX

Purpose


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All About BindingsYou can customize a pre-defined binding:


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All About BindingsYou can define custom bindings:


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Agenda




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All about AddressesAn endpoint address is relative to a base address:

r a Web-Hosted service, the base address is that of its virtual director


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Agenda




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All About Contracts

Service Contract: Describes theoperations a service can perform. Maps

CLR types to WSDL. Data Contract: Describes a data

structure. Maps CLR types to XSD.

Message Contract: Defines thestructure of the message on the wire.Maps CLR types to SOAP messages.


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Agenda


How Does It Work? How Do I Use and Deploy It? Bindings Addresses

Contracts How to host WCF services in ASP.NET How WCF works inside of ASP.NET


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Hosting Services inASP.NET

Write your service as usual: [ServiceContract]

[OperationContract] etc.

ServiceHosts are represented as .svc files:

Service attribute is a CLR type name

Matches from web.config


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Where can I put myservice code?

Anywhere you can put code in ASP.NET: Inline in the .svc file

In a .cs/.vb in App_Code In a class library (.dll) located in \bin

WCF plays nicely with ASP.NETs dynamic

compilation system


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Which project type shouldI use?

Services can be built in any project type Web projects

Class Libraries

Class libraries have benefits Decouples implementation from hosting environment

Can test services in other hosts (e.g. console apps)during development

However, WCF doesnt care which project typeyou useuse what makes sense for you


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Agenda




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IIS Worker Process

(w3wp.exe)


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w3wp.exe

ASP.NET


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w3wp.exe

ASP.NET Managed Hosting Layer

(System.Web.Hosting, System.Web.Compilation)

ASP.NETPage Framework, UI, Controls,HTTP Runtime(System.Web, System.Web.UI)


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w3wp.exe

ASP.NET Managed Hosting Layer

(System.Web.Hosting, System.Web.Compilation)

ASP.NETPage Framework, UI,Controls,HTTP Runtime(System.Web,

System.Web.UI)

WCF Service Model(System.ServiceModel)Can share state


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WCF and the HTTP Pipeline

IISIIS

ASP

.NET

ASP

.NET

HTTPRequest

HTTPRequest

Service ImplementationService Implementation

Process HostProcess Host

WCF HttpModule(grabs *.svc)

WCF HttpModule(grabs *.svc)

WCF

WCF

HTTP TransportHTTP Transport

Protocol ChannelsProtocol Channels

DispatcherDispatcher

HTTPResponse

HTTPResponse

Other HttpModuleOther HttpModuleOther HttpModuleOther HttpModule

Other HttpModuleOther HttpModule


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Why the split?

Two technologies, different priorities

WCF: consistency across transports and

hosting environments ASP.NET: optimize for HTTP applications

hosted in IIS

Becomes very important on IIS7/WAS WAS == Windows Process Activation Service


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Implications

ASP.NET platform features stillwork for ASP.NET Forms auth Session state File/URL authorization

They just dont apply to WCF bydefault


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Summary



Documents

WCf foundation