'NET 3'0 Windows Communication Foundation

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.NET 3.0(Windows Communication Foundation)
Presenters Gavin McKay Prashant Brall
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Agenda

• Service Oriented Architecture (SOA)
• Four Tenets of Service Orientation
• .NET 3.0
• Windows Communication Foundation (WCF)
• Demo
• WCF Case Study IRIS
• Summary and Questions

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Service Oriented Architecture (SOA)

• Policies, practices, and frameworks to design and
  implement services
• Services represent building blocks for an
  organisation
• Web services are a set of protocols by which
  services can be provided
• Interface tech neutral, standard, consumable
• Design quality services, meet business needs,
  easy to use/adapt/manage

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Services ? Distributed Objects
Service Oriented Architecture
Tightly coupled distributed object solution
Your Partner
You
Programming Language
Programming Language
Database
Database
Agreements
Object Model
Object Model
Messages
Operating System
Operating System
Application Server
Application Server
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Tenet 1 Boundaries are Explicit

• Services interact through explicit
  message-passing over well-defined boundaries
• Crossing boundaries is potentially costly
• Reduce the surface area

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Tenet 2 Services Are Autonomous

• Services behave as independent entities
• Services are independently deployed, versioned,
  and managed
• Services should be built not to fail, using (for
  example) transactions, redundancy and failover
  techniques

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Tenet 3 Services share schema and contract, not
class

• Class implies implementation which adds
  tight-coupling between services
• ATM withdrawal example
• Schema bank card
• Contract your account
• Class ATM gets money from cash drawer
• Tightly-coupled service interfaces restrict
  solution choices

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Tenet 4 Service compatibility Is based upon
policy

• Services providers and consumers have operational
  requirements for interactions
• Example Provider requires consumer to have a
  valid account
• Example Consumer requires provider to have
  encrypted communication

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.NET Communication Technologies
My System
.NET Remoting
ASMX
System Messaging
WSE
COM
Enterprise Services
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.NET 3.0
.NET 3.0
Windows Communication Foundation
Windows Presentation Foundation
Windows CardSpace
Windows Workflow Foundation
.NET 2.0 CLR, .NET 2.0 Base Class
LibrariesASP.NET 2.0, ADO.NET 2.0, WinForms 2.0
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Windows Communication Foundation (WCF)

• Designed for building service-oriented apps
• Key word Communication (its not just about Web
  Services!)
• WCF is the interface for service communication
• Uses config file to specify service interface
• Available as assemblies for your projects
• System.Runtime.Serialization
• System.ServiceModel

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WCF Communication Technologies
WCF

• WCF takes care of communication implementation
• Configuration instead of development

My System
.NET Remoting
ASMX
System Messaging
WSE
COM
Enterprise Services
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Demo

• Core Concepts
• Great Quotations ServiceWCF and the WCF config
  editor
• SecurityAdd encryption to the Great Quotations
  service via configuration
• Picture ServiceDeliver streamed content via WCF

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Core Concepts
Service
Caller
C
B
A
Message
C
B
A
C
B
A
End point
Contract (What)
Binding (How)
Address (Where)
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Service Contracts
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WCF Configuration
Address
Binding
Contract
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Case Study AGPT

• Administer GP training throughout Australia
• 30 staff in Canberra, 22 offices nationwide
• IRIS .NET v1.1 Windows Form system
• SQL Server 2000 back-end
• n-tier architecture, built with application
  interfaces in mind
• Hosted solutions need access to IRIS business
  components

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Perth office wants access to IRIS business
services
so Canberra hosts Web Services for internal
IRIS components
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Job Size

• 400 .NET v1.1 functions to expose
• 18 web services
• Two devs, two months
• 3rd-party providers able to integrate their
  systems
• Solid platform for building web-based version on
  top of services

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System Design
Consumers connect to Services layer via Web
Services
WCF Service Layer
Entity translator converts from/to API
Application Layer
Challenge Data passed in different ways
Stateless API (demands uid/pwd)
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Summary

• SOA is a set of design principles for building
  enterprise serviceshttp//msdn.microsoft.com/arch
  itecture/soa/
• WCF provides configurable, consistent
  communication serviceshttp//wcf.netfx3.com/
• Web Service Software Factoryhttp//msdn.microsoft
  .com/practices/