soa via wcf

8/8/2019 SOA via WCF

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SOA VIA WCF

Mohammed H. El-Shreief.Software Engineer Team Lead

SilverKey Egypt.


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Agenda

Part I: Service Oriented ArchitecturePart I: Service Oriented Architecture Background

Motivations

What is a Service

Message Exchange Patterns (MEP)

Industry Standards

Web Standards

Part II: Introducing WCFPart II: Introducing WCF What is WCF

WCF Architecture Overview

Demos


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SERVICE ORIENTEDARCHITECTURE

Part I


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Procedural

Oriented

ObjectOriented

Component

Oriented

ServiceOriented

Time Machine

Background


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Motivations

Integration Between Systems is not an

Option.

Heterogeneous Systems.

Different Environment / Operating Systems.

Loosely Coupled.


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Do you recall LEGO ?


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What is a Service ?

Self Contained business function

Functionality exposed via a structuredmessaging scheme

Not just XML, not just HTTP XML, SOAP, JSON, Images .. etc

TCP, HTTP, Message Queues etc


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What is a Service ?

Versioning Independence

Different Message Exchange Patterns

One way, Request/Reply & Duplex


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Message Exchange Patterns

(MEP) One-way (Datagram)

Request / Reply

Duplex

Sender

Sender

Sender

Receiver

Receiver

Receiver


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Industry Standards

SOAP

Simple Object Access Protocol

XML Based WS-* Specifications

Set of specifications to coordinate reliability,transactions, faults, security etc

Agreed upon many vendors (IBM, ORACLE, MS )

WS-Addressing, WS-Security, WS-AtomicTransaction, etc


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Web Standards

REST

Representational State Transfer

URI is the key to the data http://demoday.us/visitors/all

Data can be

XML, JSON, Binary etc


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Give SOAP a REST

REST is not a WS-* or SOAP alternative

or vice-versa

Each has its use

REST: Easy to understand, simple for data listing

WS-*: Rich MEP

, Reliability, Transactions, etc

Choose whichever fits


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Examples of online services


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INTRODUCING WCF

Part II


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What is WCF

CommunicationsCommunications

RemotingRemoting

WebWebServicesServices

SocketsSocketsMessageMessageQueuesQueues

EnterpriseEnterpriseServicesServices

WCFWCF


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What is WCF ?

The most extensible framework

You can add or modify layers upon your need

Built-in support for WS-* Choose the right Binding

Enterprise Features

Logging, Tracing, Instance Control, Throttling etc

Makes life easier for everybody

Architects, Developers & Administrators


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DEMO

Simple Service

ServiceContractAttribute

OperationContractAttribute Hosting

Service Endpoint

Address

Binding

Contract


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WCF Architecture

WCF RuntimeWCF Runtime

Channel StackChannel Stack

DispatcherDispatcher

TransportTransport

EncodingEncoding

ProtocolProtocol

ProtocolProtocol

ProtocolProtocol

Service InstanceService Instance

MethodMethod MethodMethod

MessageMessage

.Net.NetAssemblyAssembly

ContractContract

Data, Message, ServiceData, Message, Service

ContractContract

ConfigurationConfiguration

BindingBinding

Protocols, Encoding,Protocols, Encoding,

TransportTransport


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WCF Architecture

End PointEnd Point

AddressAddress BindingBinding ContractContract


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A network address wherewhere the EndPoint

resides

Examples http://silverkey.com/services/demoday.svc

net.tcp://192.168.1.200:3000/service1

net.msmq://myserver/private/testQueue

AddressAddress


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Specifies howhow the EndPoint communicates

with the world

Defines things like Transport (eg. HTTP, TCP)

Encoding (Text, Binary, MTOM )

Security Options (SSL, Message security)

Examples

BasicHttpBinding, NetTcpBinding,NetMsmqBinding, NetNamedPipesBinding etc

BindingBinding


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Specifies whatwhat the EndPoint communicates

Defines things like

Message Exchange Patterns (one-way, duplex ) Service Operations

Behaviors (Exchange Meta-Data, Impersonation,Authorization etc)

ContractContract


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Example

Callbacks

Tracing

Logging Security


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Before The End

WCF 2.0

Comes with netfx 3.5

Workflow enabled services (WCF + WF) Use WCF Services in WF

Expose workflows as WCF services

REST Enabled Services

JSON Encoding

RSS & ATOM support in WCF

More .


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Resources

SOA http://www.microsoft.com/soa http://msdn.microsoft.com/architecture/soa/

WCF http://wcf.netfx3.com http://www.idesign.net

http://msdn.com/wcf

Books WCF Step By Step Pro WCF


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Questions


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Contacts

Blogs

http://www.Bashmohandes.com

Email

[email protected]

[email protected]


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THANKS

soa via wcf

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