WCF 4 Overview

Agenda
 Introducción
 Contratos
 Binding
 Behaviors
 REST
 Nuevo en WCF4

ABC de WCF
 Address (Donde)
 Binding (Como)
 Contract (Que)

WCF Channel Layer
Cliente Servicio

Protocol Channel 1 Protocol Channel 1

Protocol Channel 2 Protocol Channel 2

Protocol Channel N Protocol Channel N

Encoder Encoder

Transport Transport

Contratos
Describe las operaciones que el servicio
Servicio
realiza. Mapea tipos CLR (WSDL).

Describe la estructura de datos. Mapea tipos
Datos
CLR (XSD).

Define la estructura del mensaje. Mapea tipos
Mensaje
CLR (SOAP message)

Service Contract
[ServiceContract]
public interface ICalculator
{
[OperationContract]
ComplexProblem Do(ComplexProblem p);
}

Service Contract: OneWay
[ServiceContract]
public interface IOneWayCalculator
{
[OperationContract(IsOneWay=true)]
void Do(ComplexProblem p);
}

Service Contract: Duplex
[ServiceContract(
CallbackContract=typeof(ICalculatorResults)]
public interface ICalculatorProblems
{
void SolveProblem (ComplexProblem p);
}

public interface ICalculatorResults
{
void Results(ComplexProblem p);
}

Service Contracts: Faults
[ServiceContract]
public interface ICalculator
{
[OperationContract]
[FaultContract(typeof(DivideByZeroException))]
ComplexProblem Do(ComplexProblem p);
}

try {
return n1 / n2;
}
catch (DivideByZeroException e) {
var f = new DivideByZeroException(“Calc Failure”);
throw new FaultException<DivideByZeroException>(f);
}

Data Contract
[DataContract]
public class ComplexNumber
{
[DataMember]
public double Real;

[DataMember]
public double Imaginary { get; set; }
}

Message Contract
[MessageContract]
public class ComplexProblem
{
[MessageHeader]
public string Operation { get; set;}
[MessageBody]
public ComplexNumber Op1 { get; set; }
[MessageBody]
public ComplexNumber Op2 { get; set; }
}

Standard Bindings
Name Transport Encoding
BasicHttpBinding HTTP/HTTPS Text/MTOM
NetTcpBinding TCP Binary
NetPeerTcpBinding P2P Binary
NetNamedPipeBinding IPC Binary
WSHttpBinding HTTP/HTTPS Text/MTOM
WSFederationHttpBinding HTTP/HTTPS Text/MTOM
WSDualHttpBinding HTTP/HTTPS Text/MTOM
NetMsmqBinding MSMQ Binary
MsmqIntegrationBinding MSMQ Binary
WebHttpBinding HTTP/HTTPS Text/Binary

Binding en Configuracion
<system.serviceModel>
<services>
<service name="CalculatorService">
<endpoint address=“http://localhost/calculator"
binding="basicHttpBinding"
contractType="ICalculator" />
</service>
</services>
</system.serviceModel>

Custom Bindings
<bindings>
<customBinding>
<binding configurationName="Binding1">
<reliableSession bufferedMessagesQuota="32"
inactivityTimeout="00:10:00"
maxRetryCount="8"
ordered="true" />
<httpsTransport manualAddressing="false"
maxMessageSize="65536"
hostNameComparisonMode="StrongWildcard"/>
<textMessageEncoding maxReadPoolSize="64"
maxWritePoolSize="16"
messageVersion="Default"
writeEncoding="utf-8" />
</binding>
</customBinding>
</bindings>

Behaviors Overview
 Implementan semántica del sistema
 Para el desarrollador
 Concurrencia
 Instanciación
 Transacciones
 Impersonation
 Para operaciones
 Throttling
 Metadata

Instanciación
 Per Call
 Singleton
 Session

Throttling
<behaviors>
<behavior configurationName="CalculatorBehavior" >
<serviceThrottling maxConcurrentCalls="10"
maxConnections="10"
maxInstances="10"
maxPendingOperations="10" />
</behavior>
</behaviors>

REST
 Acrónimo de REpresentational State Transfer
 Es un estilo de arquitectura
 Mejor uso de HTTP
 Menor complejidad
 Interoperable

Principios de REST
 Identificar recursos por medio de URIs
 Uso de verbos HTTP
 Link resources
 Presentación en múltiples formatos (JSON/POX)
 Comunicación Stateless

Identifica recursos con URIs

http://myservice/rooms
http://myservice/rooms(3)
http://myservice/Colors(red)
http://myservice/Transactions(1145001)

Verbos HTTP usados
 Get: obtiene la representación de un recurso
 Put: actualiza un recurso
 Post: crea un nuevo recurso
 Delete: elimina un recurso

Link Resources
<order self=’http://example.com/orders(1234)’>
<amount>23</amount>
<product
ref=’http://example.com/products(4554)’ />
<customer
ref=’http://example.com/customers(1234)’ />
</order>

REST en WCF
 Basado en nuevos atributos
 WebGet (Get)
 WebInvoke (Post/Put/Delete)
 Permite definir el tipo de Serializacion
 JSON
 XML
 Soporte de streaming retornando un Stream

Nuevo en WCF 4
 Simplificación de configuración
 Activación en IIS (.svc opcional)
 Soporte de WS-Discovery (udp based)
 Soporte de Router
 Bridging
 Routing por contenido
 Mejoras para REST
 Pagina de ayuda
 Integración con rutas de MVC
 Caching

Referencias
 A Guide to Designing and Building RESTful Web
Services with WCF 3.5
 http://msdn.microsoft.com/en-us/library/dd203052.aspx
 WCF REST Starter Kit
 http://aspnet.codeplex.com/releases/view/24644
 Windows Server AppFabric Training Kit
 http://www.microsoft.com/download/en/details.aspx?id=7956
 OData
 http://www.odata.org/

WCF 4 Overview

More Related Content

Similar to WCF 4 Overview (20)

Recently uploaded (20)

WCF 4 Overview