WCF 4 Overview
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This document provides an overview of key concepts in Windows Communication Foundation (WCF), including contracts, bindings, behaviors, and REST support. It discusses how WCF uses contracts to define service operations, data contracts for message types, and message contracts for message structure. It also covers common bindings for different transports, custom bindings, and behaviors for aspects like instancing and throttling. The document introduces REST principles supported in WCF like identifying resources with URIs and using HTTP verbs, and new features in WCF 4 like simplified configuration and WS-Discovery support.
![Service Contract
[ServiceContract]
public interface ICalculator
{
[OperationContract]
ComplexProblem Do(ComplexProblem p);
}](https://image.slidesharecdn.com/wcf4overview-111215195919-phpapp02/85/WCF-4-Overview-7-320.jpg)
![Service Contract: OneWay
[ServiceContract]
public interface IOneWayCalculator
{
[OperationContract(IsOneWay=true)]
void Do(ComplexProblem p);
}](https://image.slidesharecdn.com/wcf4overview-111215195919-phpapp02/85/WCF-4-Overview-8-320.jpg)
![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);
}](https://image.slidesharecdn.com/wcf4overview-111215195919-phpapp02/85/WCF-4-Overview-9-320.jpg)
![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);
}](https://image.slidesharecdn.com/wcf4overview-111215195919-phpapp02/85/WCF-4-Overview-10-320.jpg)
![Data Contract
[DataContract]
public class ComplexNumber
{
[DataMember]
public double Real;
[DataMember]
public double Imaginary { get; set; }
}](https://image.slidesharecdn.com/wcf4overview-111215195919-phpapp02/85/WCF-4-Overview-11-320.jpg)
![Message Contract
[MessageContract]
public class ComplexProblem
{
[MessageHeader]
public string Operation { get; set;}
[MessageBody]
public ComplexNumber Op1 { get; set; }
[MessageBody]
public ComplexNumber Op2 { get; set; }
}](https://image.slidesharecdn.com/wcf4overview-111215195919-phpapp02/85/WCF-4-Overview-12-320.jpg)
WCF 4 Overview
- 2. Agenda Introducci坦n Contratos Binding Behaviors REST Nuevo en WCF4
- 3. ABC de WCF Address (Donde) Binding (Como) Contract (Que)
- 4. 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
- 5. Contratos
- 6. 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)
- 7. Service Contract [ServiceContract] public interface ICalculator { [OperationContract] ComplexProblem Do(ComplexProblem p); }
- 8. Service Contract: OneWay [ServiceContract] public interface IOneWayCalculator { [OperationContract(IsOneWay=true)] void Do(ComplexProblem p); }
- 9. 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); }
- 10. 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); }
- 11. Data Contract [DataContract] public class ComplexNumber { [DataMember] public double Real; [DataMember] public double Imaginary { get; set; } }
- 12. Message Contract [MessageContract] public class ComplexProblem { [MessageHeader] public string Operation { get; set;} [MessageBody] public ComplexNumber Op1 { get; set; } [MessageBody] public ComplexNumber Op2 { get; set; } }
- 13. Bindings
- 14. 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
- 15. Binding en Configuracion <system.serviceModel> <services> <service name="CalculatorService"> <endpoint address=http://localhost/calculator" binding="basicHttpBinding" contractType="ICalculator" /> </service> </services> </system.serviceModel>
- 16. 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>
- 17. Behaviors
- 18. Behaviors Overview Implementan sem叩ntica del sistema Para el desarrollador Concurrencia Instanciaci坦n Transacciones Impersonation Para operaciones Throttling Metadata
- 19. Instanciaci坦n Per Call Singleton Session
- 20. Throttling <behaviors> <behavior configurationName="CalculatorBehavior" > <serviceThrottling maxConcurrentCalls="10" maxConnections="10" maxInstances="10" maxPendingOperations="10" /> </behavior> </behaviors>
- 21. REST Acr坦nimo de REpresentational State Transfer Es un estilo de arquitectura Mejor uso de HTTP Menor complejidad Interoperable
- 22. Principios de REST Identificar recursos por medio de URIs Uso de verbos HTTP Link resources Presentaci坦n en m炭ltiples formatos (JSON/POX) Comunicaci坦n Stateless
- 23. Identifica recursos con URIs http://myservice/rooms http://myservice/rooms(3) http://myservice/Colors(red) http://myservice/Transactions(1145001)
- 24. Verbos HTTP usados Get: obtiene la representaci坦n de un recurso Put: actualiza un recurso Post: crea un nuevo recurso Delete: elimina un recurso
- 25. 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>
- 26. REST en WCF
- 27. 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
- 28. Nuevo en WCF 4 Simplificaci坦n de configuraci坦n Activaci坦n en IIS (.svc opcional) Soporte de WS-Discovery (udp based) Soporte de Router Bridging Routing por contenido Mejoras para REST Pagina de ayuda Integraci坦n con rutas de MVC Caching
- 29. 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/