WCF Share & Learn

7/23/2019 WCF Share & Learn

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Windows CommunicationFoundation (WCF)



Agenda

• Introduction of Remoting and Web services• Introduction of WCF• When you should use it.• What software you need to create a WCF service• Advantages of WCF• Architecture of WCF• Programming with WCF

• Services Service !"ecution #oundaries$ WCF % &ocation 'rans(arencies)• Contracts Service$ *ata$ Fault and +essage)• Addresses 'CP$ ,''P$ IPC$ +S+- and PP)• ,osting IIS$ Self$ WAS$Windows)

• #indings• !nd Points• !"am(le of WCF % Im(lementations



Introduction of WCF

• WCF is a set of .NET technologies (Web services ,.NetRemoting and enterprises services) for building and runningconnected sstems.

• WCF provides secure, reliable, and transacted messaging

along !ith interoperabilit

• WCF applications can be developed in an language !hich cantarget the .NET runtime

• "stem."ervice#odel is the assembl that contains corefunctionalit for WCF.



When you should use it.

• When our business logic has to interact !ith a variet of clientapplications.

• When client apps, !hich are going to use our service, ma be!ritten in $ava or .Net.

• %ou are targeting a distributed computing architecture.



Softwar s r quir d to cr at WCF

• /isual studio .0et Framewor1 2.3

• +icrosoft Windows Software *evelo(ment 4it S*4)

• /isual studio e"tensions for WCF .



Advantages of WCF

• +a1es 5I (rogramming % distributed (rogramming very easy.

• Reduce com(le"ity by allowing us to focus on single (rogrammingmodel rather than learn multi(le (rogramming models.

• ,el(s us tal1 to various a((lications written in various languages withease which means more (robable revenues as various a((lications canstart using your core services with ease.

• ,el(s us forget about intero(erability between various underlying webservice technologies in the (ast$ (resent and future.

• With WCF$ a single service can be defined and e"(osed over multi(leend(oints to su((ort multi(le (rotocols at the same time.



WCF Architecture 6verview



Services in WCF

'he WCF a((lications e"(ose the functionality through services. A Service

enca(sulate business functionality and e"(oses a set of methods that can beaccessed by remote clients.

• When a((lied to a class$ the class becomes a service ty(e. When a((lied to an

interface$ any class that im(lements the interface becomes a service ty(e.

• In either case$ methods e"(osed by the class or interface must be decoratedwith the 6(erationContractAttribute to be considered (art of theservicecontract. +ethods with this attribute are considered service o(erations.



Addresses

'he address (rovides two im(ortant elements7 the location of theservice and the trans(ort (rotocol or trans(ort schema used tocommunicate with the service.

a) 'CP Addresses !". net.tc(788localhost79338+yService.

b) ,''P Addresses !". htt(788localhost7933:

c) IPC Addresses !". net.(i(e788localhost8+yPi(e

d) +S+- Addresses!". net.msm;788localhost8+yService

http://localhost:8001/

http://localhost:8001/



Contracts

Tpes of contracts&

• a) "ervice Contracts

*escribe which o(erations the client can (erform on the service.

• b) 'ata Contracts

*efine which data ty(es are (assed to and from the service.

• c) Fault Contracts

*efine which errors are raised by the service$ and how the service handles and(ro(agates errors to its clients.

• d) #essage Contracts

Allow the service to interact directly with messages.



Hosting

WCF "ervice osting&

• IIS ,osting

,osting in IIS is very similar to hosting a classic AS+< web service. =ou need to

create a virtual directory under IIS and su((ly a .svc file.

Su((ort only ,''P (rotocol.

• Self ,osting

Self>hosting is the name for the techni;ue used when the develo(er is res(onsiblefor (roviding and managing the life cycle of the host (rocess

• Windows Activation Service

Windows Activation service is a system service available with Windows vista andwindows server 339.

Su((orts ,tt($ 'CP and named (i(es



Bindings

WCF grou(s together a set of communication as(ects in bindings. A binding is merely a consistent$ canned set of choices regarding the trans(ort (rotocol$

message encoding$ communication (attern$ reliability$ security$ transaction

(ro(agation$ and intero(erability.

WCF defines nine standard bindings&

• asic inding• TC* inding

• *+* inding

• *C inding

• W" inding

• Federated W" inding

• 'uple- W" inding• #"# inding

• #"# ntegration inding



/ist of bindings &



Endpoints

The endpoint is the fusion of the address, contract, and binding (0C).

• 0ddress &1 'he address is obviously the location of the service

• inding&1 'he binding s(ecifies security o(tions$ encoding o(tions$ andtrans(ort o(tions.

• Contract&1 'he contract is the actual interface that the service im(lements.

• !very end(oint must have all three elements$ and the host e"(oses the end(oint.&ogically

• !very service must e"(ose at least one business end(oint and each end(oint

has e"actly one contract. All end(oints on a service have uni;ue addresses$ anda single service can e"(ose multi(le end(oints. 'hese end(oints can use thesame or different bindings and can e"(ose the same or different contracts..



Saple WCF

• Class

(ublic class !m(loyee

?

(ublic int Id ? get@ set@

(ublic string !mail ?get@set@

(ublic &istB!m(loyee Det!m(&ist)

?

&istB!m(loyee em(&ist E new &istB!m(loyee)@

em(&ist.Addnew !m(loyee) ? Id E :$ !mailEArmanGsomemail.com)@

em(&ist.Addnew !m(loyee) ? Id E :$ !mail E ArnabGsomemail.com )@

return em(&ist@



• nterface

HServiceContract (ublic interface I!m(loyeeService

? H6(erationContract &istB!m(loyee Fetch!mail&iststring mail)@

• nterface mplementation

(ublic class !m(loyeeService 7 I!m(loyeeService ? (ublic &istB!m(loyee Fetch!mail&iststring mail) ? var em( E new !m(loyee)@ var fetch!mail E em(.Det!m(&ist)

.Wherem E m.!mail.'o&ower).StartsWithmail.'o&ower)))@ return fetch!mail.'o&ist)@



Jfunction ) ? J.tb).autocom(lete? source7 function re;uest$ res(onse) ? J.aKa"? url7 !m(loyee&ist.svc8Fetch!mail&ist$ data7 ? LmailL7 L M re;uest.term M L $ data'y(e7 Kson$ ty(e7 P6S'$ content'y(e7 a((lication8Kson@ charsetEutf>9$ dataFilter7 function data) ? return data@ $

success7 function data) ? res(onseJ.ma(data.d$ function item) ? return ? value7 item.!mail )) $

error7 function <+&,tt(Re;uest$ te"tStatus$ error'hrown) ? alertte"tStatus)@ )@ $ min&ength7 )@



Bsystem.service+odel

Bservices Bservice nameEService Bend(oint addressEsoa( contractEIService bindingEbasic,tt(#inding8

Bend(oint addressErest contractEIService bindingEweb,tt(#indingbehaviorConfigurationErest#ehavior8

Bend(oint contractEI+etadata!"change bindingEme",tt(#inding addressEme" 8 B8service B8services Bbehaviors Bend(oint#ehaviors Bbehavior nameErest#ehavior Bweb,tt( hel(!nabledEtrue8 B8behavior B8end(oint#ehaviors Bservice#ehaviors Bbehavior Bservice+etadata htt(Det!nabledEtrue8 Bservice*ebug include!"ce(tion*etailInFaultsEtrue 8

B8behavior B8service#ehaviors B8behaviors Bservice,osting!nvironment multi(leSite#indings!nabledEtrue 8 B8system.service+odel



Thank You

WCF Share & Learn

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