private void SerialiseSystemException(CdrOutputStream targetStream, Exception corbaEx) {
// serialize a system exception
if (!(corbaEx is AbstractCORBASystemException)) {
corbaEx = new UNKNOWN(202, omg.org.CORBA.CompletionStatus.Completed_MayBe);
}
Serializer ser =
m_serFactory.Create(corbaEx.GetType(), Util.AttributeExtCollection.EmptyCollection);
ser.Serialize(corbaEx, targetStream);
}
/// <summary>
/// determines, which exception to return to the client based on
/// the called method/attribute and on the Exception thrown.
/// Make sure to return only exceptions, which are allowed for the thrower; e.g.
/// only those specified in the interface for methods and for attributes only system exceptions.
/// </summary>
private Exception DetermineExceptionToThrow(Exception thrown, MethodBase thrower) {
if (thrown is omg.org.CORBA.AbstractCORBASystemException) {
return thrown; // system exceptions are not wrapped or transformed
}
Exception exceptionToThrow;
if ((thrower is MethodInfo) && (!((MethodInfo)thrower).IsSpecialName)) { // is a normal method (i.e. no property accessor, ...)
if (ReflectionHelper.IIdlEntityType.IsAssignableFrom(thrower.DeclaringType)) {
exceptionToThrow = DetermineIdlExceptionToThrow(thrown,
(MethodInfo)thrower);
} else {
if (ReflectionHelper.IsExceptionInRaiseAttributes(thrown, (MethodInfo)thrower) &&
(thrown is AbstractUserException)) {
exceptionToThrow = thrown; // a .NET method could also use ThrowsIdlException attribute to return non-wrapped exceptions
} else {
// wrap into generic user exception, because CLS to IDL gen adds this exception to
// all methods
exceptionToThrow = new GenericUserException(thrown);
}
}
} else if ((thrower is MethodInfo) && (((MethodInfo)thrower).IsSpecialName)) { // is a special method (i.e. a property accessor, ...)
exceptionToThrow = new UNKNOWN(190, CompletionStatus.Completed_Yes);
} else {
// thrower == null means here, that the target method was not determined,
// i.e. the request deserialisation was not ok
Debug.WriteLine("target method unknown, can't determine what exception client accepts; thrown was: " +
thrown);
exceptionToThrow = new UNKNOWN(201, CompletionStatus.Completed_No);
}
return exceptionToThrow;
}
/// <summary>serialize the GIOP message body of a repsonse message</summary>
/// <param name="requestId">the requestId of the request, this response belongs to</param>
internal void SerialiseReply(GiopServerRequest request, CdrOutputStream targetStream,
GiopVersion version,
GiopConnectionDesc conDesc) {
Trace.WriteLine("serializing response for method: " + request.GetRequestedMethodNameInternal());
try {
bool isExceptionReply = request.IsExceptionReply;
Exception exceptionToSend = null;
try {
request.SetRequestPICurrentFromThreadScopeCurrent(); // copy from thread scope picurrent after processing request by servant
// reply interception point
if (!request.IsExceptionReply) {
request.InterceptSendReply();
} else {
exceptionToSend = request.InterceptSendException(request.IdlException);
}
} catch (Exception ex) {
// update the reply with the exception from interception layer
isExceptionReply = true;
if (SerialiseAsSystemException(ex)) {
exceptionToSend = ex;
} else {
exceptionToSend = new UNKNOWN(300, CompletionStatus.Completed_MayBe);
}
}
ServiceContextList cntxColl = request.ResponseServiceContext;
SetCodeSet(targetStream, conDesc);
if (version.IsBeforeGiop1_2()) { // for GIOP 1.0 / 1.1
SerialiseContext(targetStream, cntxColl); // serialize the context
}
targetStream.WriteULong(request.RequestId);
if (!isExceptionReply) {
Trace.WriteLine("sending normal response to client");
targetStream.WriteULong(0); // reply status ok
if (!version.IsBeforeGiop1_2()) { // for GIOP 1.2 and later, service context is here
SerialiseContext(targetStream, cntxColl); // serialize the context
}
// serialize a response to a successful request
SerialiseResponseOk(targetStream, request, version);
Trace.WriteLine("reply body serialised");
} else {
Trace.WriteLine("excpetion to send to client: " + exceptionToSend.GetType());
if (SerialiseAsSystemException(exceptionToSend)) {
targetStream.WriteULong(2); // system exception
} else if (SerialiseAsUserException(exceptionToSend)) {
targetStream.WriteULong(1); // user exception
} else {
// should not occur
targetStream.WriteULong(2);
exceptionToSend = new INTERNAL(204, CompletionStatus.Completed_Yes);
}
if (!version.IsBeforeGiop1_2()) { // for GIOP 1.2 and later, service context is here
SerialiseContext(targetStream, cntxColl); // serialize the context
}
AlignBodyIfNeeded(targetStream, version);
if (SerialiseAsSystemException(exceptionToSend)) {
SerialiseSystemException(targetStream, exceptionToSend);
} else {
SerialiseUserException(targetStream, (AbstractUserException)exceptionToSend);
}
Trace.WriteLine("exception reply serialised");
}
} finally {
request.ClearThreadScopePICurrent(); // no longer needed, clear afterwards to prevent access to stale data during next requests
}
}