/// <summary>
/// Handles remote method invocation.
/// </summary>
/// <param name="methodCallMessage"><see cref="IMethodCallMessage"/> to process.</param>
/// <param name="methodInfo"><see cref="MethodInfo"/> for the method being called.</param>
/// <returns><see cref="ReturnMessage"/>, if the call is processed successfully, otherwise, false.</returns>
private ReturnMessage HandleRemoteInvocation(IMethodCallMessage methodCallMessage, MethodInfo methodInfo)
{
_connection.PrepareCallContext(_implicitTransactionTransfer);
var returnMessage = InvokeRemoteMethod(methodCallMessage);
_connection.CheckRemoteSubscriptionCounter();
return(returnMessage);
}
/// <summary>
/// Invokes a remote method.
/// </summary>
/// <param name="methodCallMessage">Remoting message.</param>
/// <returns>Remoting response message</returns>
private ReturnMessage InvokeRemoteMethod(IMethodCallMessage methodCallMessage)
{
Guid trackingID = Guid.NewGuid();
//try
//{
object returnValue = null;
List <DelegateCorrelationInfo> correlationSet = null;
if (_activationType == ActivationType.SingleCall)
{
correlationSet = _delegateCorrelationSet;
}
BeforeInvokeEventArgs cancelArgs = new BeforeInvokeEventArgs()
{
TrackingID = trackingID,
InterfaceName = _interfaceType.FullName,
DelegateCorrelationSet = correlationSet,
MethodName = methodCallMessage.MethodName,
Arguments = methodCallMessage.Args,
Cancel = false
};
_connection.OnBeforeInvoke(cancelArgs);
if (cancelArgs.Cancel)
{
if (cancelArgs.CancelException == null)
{
cancelArgs.CancelException = new InvokeCanceledException();
}
_connection.OnInvokeCanceled(new InvokeCanceledEventArgs()
{
TrackingID = trackingID, CancelException = cancelArgs.CancelException
});
throw cancelArgs.CancelException.PreserveStackTrace();
}
// Prepare generic method arguments
Type[] genericArgs = null;
if (methodCallMessage.MethodBase.IsGenericMethod)
{
genericArgs = methodCallMessage.MethodBase.GetGenericArguments();
}
var paramDefs = methodCallMessage.MethodBase.GetParameters();
var paramTypes = paramDefs.Select(p => p.ParameterType).ToArray();
try
{
object[] checkedArgs = InterceptDelegateParameters(methodCallMessage);
returnValue = _connection.SendRemoteMethodCallMessage
(
trackingID,
_uniqueName,
correlationSet,
methodCallMessage.MethodName,
genericArgs,
paramTypes,
checkedArgs,
_connection.PrepareCallContext(_implicitTransactionTransfer)
);
AfterInvokeEventArgs afterInvokeArgs = new AfterInvokeEventArgs()
{
TrackingID = trackingID,
InterfaceName = _interfaceType.FullName,
DelegateCorrelationSet = correlationSet,
MethodName = methodCallMessage.MethodName,
Arguments = methodCallMessage.Args,
ReturnValue = returnValue
};
_connection.OnAfterInvoke(afterInvokeArgs);
}
catch (InvalidSessionException)
{
if (_autoLoginOnExpiredSession)
{
if (_connection.Reconnect())
{
object[] checkedArgs = InterceptDelegateParameters(methodCallMessage);
returnValue = _connection.SendRemoteMethodCallMessage
(
trackingID,
_uniqueName,
correlationSet,
methodCallMessage.MethodName,
genericArgs,
paramTypes,
checkedArgs,
_connection.PrepareCallContext(_implicitTransactionTransfer)
);
}
else
{
throw;
}
}
else
{
throw;
}
}
var container = returnValue as CustomSerializationContainer;
if (container != null)
{
var serializationHandler = _connection.SerializationHandling[container.HandledType];
if (serializationHandler == null)
{
throw new KeyNotFoundException(string.Format(LanguageResource.KeyNotFoundException_SerializationHandlerNotFound, container.HandledType.FullName));
}
returnValue = serializationHandler.Deserialize(container.DataType, container.Data);
}
return(new ReturnMessage(returnValue, null, 0, methodCallMessage.LogicalCallContext, methodCallMessage));
//}
//catch (Exception ex)
//{
// if (_connection.ErrorHandlingEnabled)
// throw;
// else
// return new ReturnMessage(ex, methodCallMessage);
//}
}
/// <summary>
/// Entfernte Methode aufrufen.
/// </summary>
/// <param name="message">Remoting-Nachricht mit Details für den entfernten Methodenaufruf</param>
/// <returns>Remoting Antwortnachricht</returns>
public override IMessage Invoke(IMessage message)
{
// Wenn keine Nachricht angegeben wurde ...
if (message == null)
{
// Ausnahme werfen
throw new ArgumentNullException("message");
}
// Nachricht in benötigte Schnittstelle casten
IMethodCallMessage methodCallMessage = (IMethodCallMessage)message;
// Methoden-Metadaten abrufen
MethodInfo methodInfo = (MethodInfo)methodCallMessage.MethodBase;
methodInfo.GetParameters();
// Wenn die Methode ein Delegat ist ...
if (methodInfo.ReturnType.Equals(typeof(void)) &&
methodCallMessage.InArgCount == 1 &&
methodCallMessage.ArgCount == 1 &&
methodCallMessage.Args[0] != null &&
typeof(Delegate).IsAssignableFrom(methodCallMessage.Args[0].GetType()) &&
(methodCallMessage.MethodName.StartsWith("set_") || methodCallMessage.MethodName.StartsWith("add_")))
{
// Delegat auf zu verdrahtende Client-Methode abrufen
object receiveMethodDelegate = methodCallMessage.GetArg(0);
// "set_" wegschneiden
string propertyName = methodCallMessage.MethodName.Substring(4);
// Verdrahtungskonfiguration festschreiben
DelegateInterceptor wiring = new DelegateInterceptor()
{
ClientDelegate = receiveMethodDelegate
};
// Korrelationsinformation zusammenstellen
DelegateCorrelationInfo correlationInfo = new DelegateCorrelationInfo()
{
IsEvent = methodCallMessage.MethodName.StartsWith("add_"),
DelegateMemberName = propertyName,
ClientDelegateInterceptor = wiring
};
// Wenn die Serverkomponente Singletonaktiviert ist ...
if (_activationType == ActivationType.Singleton)
{
// Ereignis der Serverkomponente abonnieren
_connection.RemoteComponentFactory.AddEventHandler(_interfaceType.FullName, correlationInfo);
}
// Verdrahtung in der Sammlung ablegen
_delegateCorrelationSet.Add(correlationInfo);
// Leere Remoting-Antwortnachricht erstellen und zurückgeben
return(new ReturnMessage(null, null, 0, methodCallMessage.LogicalCallContext, methodCallMessage));
}
else if (methodInfo.ReturnType.Equals(typeof(void)) &&
methodCallMessage.InArgCount == 1 &&
methodCallMessage.ArgCount == 1 &&
methodCallMessage.Args[0] != null &&
typeof(Delegate).IsAssignableFrom(methodCallMessage.Args[0].GetType()) &&
(methodCallMessage.MethodName.StartsWith("remove_")))
{
// EBC-Eingangsnachricht abrufen
object inputMessage = methodCallMessage.GetArg(0);
// "remove_" wegschneiden
string propertyName = methodCallMessage.MethodName.Substring(7);
// Wenn Verdrahtungen gespeichert sind ...
if (_delegateCorrelationSet.Count > 0)
{
// Verdrahtungskonfiguration suchen
DelegateCorrelationInfo found = (from correlationInfo in (DelegateCorrelationInfo[])_delegateCorrelationSet.ToArray()
where correlationInfo.DelegateMemberName.Equals(propertyName) && correlationInfo.ClientDelegateInterceptor.ClientDelegate.Equals(inputMessage)
select correlationInfo).FirstOrDefault();
// Wenn eine passende Verdrahtungskonfiguration gefunden wurde ...
if (found != null)
{
// Wenn die Serverkomponente SingleCallaktiviert ist ...
if (_activationType == ActivationType.SingleCall)
{
// Verdrahtungskonfiguration entfernen
_delegateCorrelationSet.Remove(found);
}
else
{
// Ereignisabo entfernen
_connection.RemoteComponentFactory.RemoveEventHandler(_interfaceType.FullName, found);
}
}
}
// Leere Remoting-Antwortnachricht erstellen und zurückgeben
return(new ReturnMessage(null, null, 0, methodCallMessage.LogicalCallContext, methodCallMessage));
}
else
{
// Aufrufkontext vorbereiten
_connection.PrepareCallContext(_implicitTransactionTransfer);
// Entfernten Methodenaufruf durchführen und jede Antwortnachricht sofort über einen Rückkanal empfangen
return(InvokeRemoteMethod(methodCallMessage));
}
}
