Procédure : inspecter ou modifier des paramètres
Vous pouvez inspecter ou modifier les messages entrants ou sortants d'une seule opération sur un objet client ou un service Windows Communication Foundation (WC) en implémentant l'interface System.ServiceModel.Dispatcher.IParameterInspector et en l'insérant dans l'exécution du client ou du service. En général, un comportement d'opération est utilisé pour ajouter des inspecteurs de paramètre pour une seule opération ; d'autres comportements peuvent être utilisés pour fournir un accès aisé à l'exécution à une échelle plus grande. Pour plus d’informations, consultez Extension des clients et Extension des répartiteurs.
Inspection ou modification de paramètres
Implémentez l'interface System.ServiceModel.Dispatcher.IParameterInspector.
Implémentez un System.ServiceModel.Description.IOperationBehavior, System.ServiceModel.Description.IEndpointBehavior, System.ServiceModel.Description.IServiceBehavior ou System.ServiceModel.Description.IContractBehavior (en fonction de la portée requise) pour ajouter votre inspecteur de paramètre aux propriétés ClientOperation.ParameterInspectors ou DispatchOperation.ParameterInspectors.
Insérez votre comportement avant d'appeler ClientBase<TChannel>.Open ou la méthode ICommunicationObject.Open sur System.ServiceModel.ChannelFactory<TChannel>. Pour plus d’informations, consultez Configuration et extension du runtime avec des comportements.
Exemple
Les exemples de code suivants affichent, dans l'ordre :
Une implémentation de l'inspecteur de paramètre
L'implémentation de comportement qui insère l'inspecteur de paramètre à l'aide de System.ServiceModel.Description.IOperationBehavior, System.ServiceModel.Description.IEndpointBehavior et System.ServiceModel.Description.IServiceBehavior
Un fichier de configuration qui charge et exécute le comportement de point de terminaison dans une application cliente pour insérer l'inspecteur de paramètre sur le client
#region IParameterInspector Members
public void AfterCall(string operationName, object[] outputs, object returnValue, object correlationState)
{
Console.WriteLine(
"IParameterInspector.AfterCall called for {0} with return value {1}.",
operationName,
returnValue.ToString()
);
}
public object BeforeCall(string operationName, object[] inputs)
{
Console.WriteLine("IParameterInspector.BeforeCall called for {0}.", operationName);
return null;
}
#Region "IParameterInspector Members"
Public Sub AfterCall(ByVal operationName As String, ByVal outputs() As Object, ByVal returnValue As Object, _
ByVal correlationState As Object) Implements IParameterInspector.AfterCall
Console.WriteLine("IParameterInspector.AfterCall called for {0} with return value {1}.", _
operationName, returnValue.ToString())
End Sub
Public Function BeforeCall(ByVal operationName As String, ByVal inputs() As Object) As Object Implements _
IParameterInspector.BeforeCall
Console.WriteLine("IParameterInspector.BeforeCall called for {0}.", operationName)
Return Nothing
End Function
using System;
using System.Collections.Generic;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Configuration;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;
using System.Text;
namespace Microsoft.WCF.Documentation
{
public class InspectorInserter : BehaviorExtensionElement, IServiceBehavior, IEndpointBehavior, IOperationBehavior
{
#region IServiceBehavior Members
public void AddBindingParameters(
ServiceDescription serviceDescription,
ServiceHostBase serviceHostBase,
System.Collections.ObjectModel.Collection<ServiceEndpoint> endpoints,
BindingParameterCollection bindingParameters
)
{ return; }
public void ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
{
foreach (ChannelDispatcher chDisp in serviceHostBase.ChannelDispatchers)
{
foreach (EndpointDispatcher epDisp in chDisp.Endpoints)
{
epDisp.DispatchRuntime.MessageInspectors.Add(new Inspector());
foreach (DispatchOperation op in epDisp.DispatchRuntime.Operations)
op.ParameterInspectors.Add(new Inspector());
}
}
}
public void Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase){ return; }
#endregion
#region IEndpointBehavior Members
public void AddBindingParameters(
ServiceEndpoint endpoint, BindingParameterCollection bindingParameters
) { return; }
public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
{
clientRuntime.MessageInspectors.Add(new Inspector());
foreach (ClientOperation op in clientRuntime.Operations)
op.ParameterInspectors.Add(new Inspector());
}
public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
{
endpointDispatcher.DispatchRuntime.MessageInspectors.Add(new Inspector());
foreach (DispatchOperation op in endpointDispatcher.DispatchRuntime.Operations)
op.ParameterInspectors.Add(new Inspector());
}
public void Validate(ServiceEndpoint endpoint){ return; }
#endregion
#region IOperationBehavior Members
public void AddBindingParameters(
OperationDescription operationDescription, BindingParameterCollection bindingParameters
)
{ return; }
public void ApplyClientBehavior(OperationDescription operationDescription, ClientOperation clientOperation)
{
clientOperation.ParameterInspectors.Add(new Inspector());
}
public void ApplyDispatchBehavior(OperationDescription operationDescription, DispatchOperation dispatchOperation)
{
dispatchOperation.ParameterInspectors.Add(new Inspector());
}
public void Validate(OperationDescription operationDescription){ return; }
#endregion
public override Type BehaviorType
{
get { return typeof(InspectorInserter); }
}
protected override object CreateBehavior()
{ return new InspectorInserter(); }
}
}
Imports System.ServiceModel
Imports System.ServiceModel.Channels
Imports System.ServiceModel.Configuration
Imports System.ServiceModel.Description
Imports System.ServiceModel.Dispatcher
Imports System.Text
Namespace Microsoft.WCF.Documentation
Public Class InspectorInserter
Inherits BehaviorExtensionElement
Implements IServiceBehavior, IEndpointBehavior, IOperationBehavior
#Region "IServiceBehavior Members"
Public Sub AddBindingParameters(ByVal serviceDescription As ServiceDescription, _
ByVal serviceHostBase As ServiceHostBase, ByVal endpoints As _
System.Collections.ObjectModel.Collection(Of ServiceEndpoint), _
ByVal bindingParameters As BindingParameterCollection) Implements IServiceBehavior.AddBindingParameters
Return
End Sub
Public Sub ApplyDispatchBehavior(ByVal serviceDescription As ServiceDescription, _
ByVal serviceHostBase As ServiceHostBase) Implements _
IServiceBehavior.ApplyDispatchBehavior
For Each chDisp As ChannelDispatcher In serviceHostBase.ChannelDispatchers
For Each epDisp As EndpointDispatcher In chDisp.Endpoints
epDisp.DispatchRuntime.MessageInspectors.Add(New Inspector())
For Each op As DispatchOperation In epDisp.DispatchRuntime.Operations
op.ParameterInspectors.Add(New Inspector())
Next op
Next epDisp
Next chDisp
End Sub
Public Sub Validate(ByVal serviceDescription As ServiceDescription, ByVal serviceHostBase As ServiceHostBase) _
Implements IServiceBehavior.Validate
Return
End Sub
#End Region
#Region "IEndpointBehavior Members"
Public Sub AddBindingParameters(ByVal endpoint As ServiceEndpoint, ByVal bindingParameters _
As BindingParameterCollection) Implements IEndpointBehavior.AddBindingParameters
Return
End Sub
Public Sub ApplyClientBehavior(ByVal endpoint As ServiceEndpoint, ByVal clientRuntime As ClientRuntime) _
Implements IEndpointBehavior.ApplyClientBehavior
clientRuntime.MessageInspectors.Add(New Inspector())
For Each op As ClientOperation In clientRuntime.Operations
op.ParameterInspectors.Add(New Inspector())
Next op
End Sub
Public Sub ApplyDispatchBehavior(ByVal endpoint As ServiceEndpoint, ByVal endpointDispatcher As _
EndpointDispatcher) Implements IEndpointBehavior.ApplyDispatchBehavior
endpointDispatcher.DispatchRuntime.MessageInspectors.Add(New Inspector())
For Each op As DispatchOperation In endpointDispatcher.DispatchRuntime.Operations
op.ParameterInspectors.Add(New Inspector())
Next op
End Sub
Public Sub Validate(ByVal endpoint As ServiceEndpoint) Implements IEndpointBehavior.Validate
Return
End Sub
#End Region
#Region "IOperationBehavior Members"
Public Sub AddBindingParameters(ByVal operationDescription As OperationDescription, _
ByVal bindingParameters As BindingParameterCollection) Implements _
IOperationBehavior.AddBindingParameters
Return
End Sub
Public Sub ApplyClientBehavior(ByVal operationDescription As OperationDescription, ByVal _
clientOperation As ClientOperation) Implements IOperationBehavior.ApplyClientBehavior
clientOperation.ParameterInspectors.Add(New Inspector())
End Sub
Public Sub ApplyDispatchBehavior(ByVal operationDescription As OperationDescription, ByVal dispatchOperation As _
DispatchOperation) Implements IOperationBehavior.ApplyDispatchBehavior
dispatchOperation.ParameterInspectors.Add(New Inspector())
End Sub
Public Sub Validate(ByVal operationDescription As OperationDescription) Implements IOperationBehavior.Validate
Return
End Sub
#End Region
Public Overrides ReadOnly Property BehaviorType() As Type
Get
Return GetType(InspectorInserter)
End Get
End Property
Protected Overrides Function CreateBehavior() As Object
Return New InspectorInserter()
End Function
End Class
End Namespace
<client>
<endpoint
address="http://localhost:8080/SampleService"
behaviorConfiguration="clientInspectorsAdded"
binding="wsHttpBinding"
bindingConfiguration="WSHttpBinding_ISampleService"
contract="ISampleService"
name="WSHttpBinding_ISampleService"
>
</endpoint>
</client>
<behaviors>
<endpointBehaviors>
<behavior name="clientInspectorsAdded">
<clientInterceptors />
</behavior>
</endpointBehaviors>
</behaviors>
<extensions>
<behaviorExtensions>
<add
name="clientInterceptors"
type="Microsoft.WCF.Documentation.InspectorInserter, HostApplication, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null"
/>
</behaviorExtensions>
</extensions>