wcf 4 overview

WCF 4.0 OverviewMariano O. Rodriguez

AgendaIntroducciónContratosBindingBehaviorsRESTNuevo en WCF4

ABC de WCFAddress (Donde)Binding (Como)Contract (Que)

WCF Channel LayerCliente

Protocol Channel 1

Protocol Channel 2

Protocol Channel N

Encoder

Transport

Servicio

Protocol Channel 1

Protocol Channel 2

Protocol Channel N

Encoder

Transport

Contratos

Contratos

Servicio

Datos

Mensaje

Describe las operaciones que el servicio realiza. Mapea tipos CLR

(WSDL).

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

Define la estructura del mensaje. Mapea tipos 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{ [OperationContract(IsOneWay=true)] void SolveProblem (ComplexProblem p);}

public interface ICalculatorResults{ [OperationContract(IsOneWay=true)] 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; }}

Bindings

Standard BindingsName 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

Behaviors OverviewImplementan semántica del sistema

Para el desarrollador Concurrencia Instanciación Transacciones Impersonation

Para operaciones Throttling Metadata

InstanciaciónPer CallSingletonSession

Throttling

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

RESTAcrónimo de REpresentational State TransferEs un estilo de arquitectura

Mejor uso de HTTPMenor complejidadInteroperable

Principios de RESTIdentificar recursos por medio de URIsUso de verbos HTTPLink resourcesPresentación en múltiples formatos

(JSON/POX)Comunicación Stateless

Identifica recursos con URIs

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

Verbos HTTP usadosGet: obtiene la representación de un recursoPut: actualiza un recursoPost: crea un nuevo recursoDelete: 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

REST en WCFBasado en nuevos atributos

WebGet (Get)WebInvoke (Post/Put/Delete)

Permite definir el tipo de SerializacionJSONXML

Soporte de streaming retornando un Stream

Nuevo en WCF 4Simplificación de configuraciónActivación en IIS (.svc opcional)Soporte de WS-Discovery (udp based)Soporte de Router

BridgingRouting por contenido

Mejoras para RESTPagina de ayudaIntegración con rutas de MVCCaching

ReferenciasA Guide to Designing and Building RESTful

Web Services with WCF 3.5http://msdn.microsoft.com/en-us/library/dd203052.asp

xWCF REST Starter Kit

http://aspnet.codeplex.com/releases/view/24644Windows Server AppFabric Training Kit

http://www.microsoft.com/download/en/details.aspx?id=7956

ODatahttp://www.odata.org/