Service Model

Programming Model

Only WCF Services can leverage AppFabric

Service Configuration (web.config)Service Configuration (web.config)

Service EndpointService Endpoint

Address (http://localhost/MyCalc.svc)Address (http://localhost/MyCalc.svc)

Binding(basicHttp)Binding(basicHttp)

Service Contract (ICalculator)Service Contract (ICalculator)

•Host

•Service Implementation

•Service Contract

•Data Contract

•Service Endpoint (Address, Binding Contract)

•Service Behavior

Key Service Key Service ConceptsConcepts

Service Contract (ICalculator)Service Contract (ICalculator)

Operations (signatures)double Add(double a, double b)double GetArea(Rectangle r)

Operations (signatures)double Add(double a, double b)double GetArea(Rectangle r)

Service Implementation (MyCalc: ICalculator)Service Implementation (MyCalc: ICalculator)

Operations (implementation)double Add(double a, double b)double GetArea(Rectangle r)

Operations (implementation)double Add(double a, double b)double GetArea(Rectangle r)

Service Behaviors (Metadata)Service Behaviors (Metadata)

Data ContractData Contract

Rectangle double width, double height

Rectangle double width, double height

•Proxy

•Endpoints

•Messages

•Service Instance

Key Client Key Client ConceptsConcepts

Service InstanceService Instance

Proxy Instance (MyCalcClient)Proxy Instance (MyCalcClient)

Client Configuration (app.config)Client Configuration (app.config)

Client EndpointClient Endpoint

Address (http://localhost/MyCalc.svc)Address (http://localhost/MyCalc.svc)

Binding(basicHttp)Binding(basicHttp)

Service Contract (ICalculator)Service Contract (ICalculator)

proxy.Add(5,

2)proxy.Add(5,

2)

Add(5,2) 7

11

Tracked Events

Normal

Operation:

ServiceHost events

Aggregates for

Operations

Completed Calls

Troubleshooting:

Throttling

Service Exceptions

User Defined Errors

Failed Calls

Faulted Calls14

15

16

DiagnosticSection config = (DiagnosticSection) WebConfigurationManager.GetSection("system.serviceModel/diagnostics");providerId = new Guid(config.EtwProviderId);myEventProvider = new EventProvider(providerId);

errorDescriptor = new EventDescriptor(ErrorEventId, Version, Channel, ErrorLevel, Opcode, Task, Keywords);

myEventProvider.WriteEvent(ref errorDescriptor, title, serviceName, errorMessage);

error event id's 301,302,303 mean error, warning, info respectively

error event id's 301,302,303 mean error, warning, info respectively

WCFUserEventProvider eventWriter = new WCFUserEventProvider();eventWriter.WriteErrorEvent(“AddOperation”, “An error occurred.”);

Introducing WCF Services