/// <summary>
/// Invokes the message specified by the request parameter.
/// </summary>
/// <param name="request">Request to invoke</param>
/// <returns>IMessage instance representing the return message</returns>
public override IMessage Invoke(IMessage request)
{
IMethodReturnMessage response;
var call = (IMethodCallMessage)request;
var ctor = call as IConstructionCallMessage;
if (ctor != null)
{
// ReSharper disable PossibleNullReferenceException
// --- This is the call to the constructor, initialize the object
var defaultProxy = RemotingServices.GetRealProxy(Target);
response = defaultProxy.InitializeServerObject(ctor);
if (response == null)
{
var returnException = new AspectInfrastructureException(
"InitializeServerObject failed in AspectInjectionProxy.Invoke");
WindowsEventLogger.Log<AspectInfrastructureErrorEvent>(
"The {0} constructor raised a non-business exception:{1}",
ctor.MethodBase.DeclaringType.FullName,
returnException.ToString());
return new ReturnMessage(returnException, call);
}
if (response.Exception != null)
{
WindowsEventLogger.Log<AspectInfrastructureErrorEvent>(
"The {0} constructor raised a non-business exception:{1}",
ctor.MethodBase.DeclaringType.FullName,
response.Exception.ToString());
return new ReturnMessage(response.Exception, call);
}
// --- At this point the server object is initialized, and so can be used
// --- Call the contructor behind the transparent proxy.
var tp = (ContextBoundObject)GetTransparentProxy();
response = EnterpriseServicesHelper.CreateConstructionReturnMessage(ctor, tp);
// --- Allow configuring the proxy
try
{
InitializeProxy();
}
catch (Exception ex)
{
var returnException = new AspectInfrastructureException(
"Calling context setup failed in AspectInjectionProxy.Invoke", ex);
return new ReturnMessage(returnException, call);
}
// ReSharper restore PossibleNullReferenceException
}
else
{
// --- This is a call to a method
// --- Check, if the method is an aspected operation or not
response = IsAspectedMessage(call)
? OperationMethodCall(call)
: RemotingServices.ExecuteMessage(Target, call);
}
return response;
}
/// <summary>
/// Executes the operation method.
/// </summary>
/// <param name="call">Method call with parameters, to execute</param>
/// <returns>IMethodReturnMessage representing the result of the call</returns>
private IMethodReturnMessage OperationMethodCall(IMethodCallMessage call)
{
try
{
// --- Manage the "before" aspects
var response = BeforeOperationAspect(call);
// --- Call the target method, assuming there is no result yet
response = response ?? RemotingServices.ExecuteMessage(Target, call);
// --- Manage the "after" aspects including exceptions
AfterOperationAspect(call, response);
if (response.Exception != null)
{
response = new ReturnMessage(HandleExceptionAspect(call, response.Exception), call);
}
if (response.Exception == null) AfterSuccessfulOperationAspect(call, response);
return response;
}
catch (Exception ex)
{
try
{
var handledEx = HandleExceptionAspect(call, ex);
return new ReturnMessage(handledEx, call);
}
catch (Exception ex2)
{
var innerException =
new AspectInfrastructureException("HandleExceptionAspect failed.", ex2);
innerException.Data.Add("ExceptionBeinghandled", ex);
var returnException = new AspectInfrastructureException(
"Exception handling failed in AspectInjectionProxy.OperationMethodCall", innerException);
return new ReturnMessage(returnException, call);
}
}
}
