internal static bool HandleTransportExceptionHelper(Exception exception)
{
//if (exception == null)
// throw
ExceptionHandler exceptionHandler = ExceptionHandler.TransportExceptionHandler;
if (exceptionHandler == null)
{
return(false);
}
try
{
if (!exceptionHandler.HandleException(exception))
{
return(false);
}
}
catch (Exception ex)
{
//if (IsFatal(ex))
{
// throw;
}
//else
{
//if (ShouldTraceError)
RpcTrace.Error(ex);
return(false);
}
}
// if (ShouldTraceError)
// TraceHandledException(exception, TraceEventType.Error);
return(true);
}
private Message invokeContract(IRpcCallInfo call, MessageRequest request, Type contractType)
{
OperationDispatchBase operation;
bool operationExists = _operations.IdToOperation.TryGetValue(request.Operation, out operation);
if (!operationExists)
{
var error = new ActionNotSupportedException(string.Format("Server endpoint {0} with contract {1} does not supports operation with id = {2}. Check that client and server use the same version of contract and binding. ", _endpoint._address, contractType, request.Operation));
var faultMessage = new Message();
faultMessage = makeFault(error, faultMessage);
return(faultMessage);
}
OperationContext operationContext = SetupOperationConext(call, request, contractType);
Func <Message> invokeAction = () =>
{
OperationContext.Current = operationContext;
if (_concurrency == ConcurrencyMode.Single)
{
lock (this)
{
return(invokeContract(operation, request));
}
}
return(invokeContract(operation, request));
};
if (operation.Operation.IsOneWay)
{
Task task = Tasks.Factory.StartNew(invokeAction);
task.ContinueWith(x => RpcTrace.Error(x.Exception), TaskContinuationOptions.OnlyOnFaulted);
return(new Message());
}
else
{
return(invokeAction());
}
}
public override IMessage Invoke(IMessage msg)
{
var input = (IMethodCallMessage)msg;
//TODO: move to RpcCallbackProxy
if (_router._context != null)
{
_router._context.Initialize(_router._typeOfService, _router._address, _router._binding, _router._session, _router._syncContext);
}
Debug.Assert(input.MethodBase != null);
Debug.Assert(input.MethodBase.DeclaringType != null);
var iid = input.MethodBase.DeclaringType;
if (iid == typeof(ICommunicationObject))
{
//TODO: use something faster than string comparison
if (input.MethodName == "get_State")
{
return(new ReturnMessage(State, null, 0, input.LogicalCallContext, input));
}
}
else if (iid == typeof(IContextChannel))
{
if (input.MethodName == "set_OperationTimeout")
{
OperationTimeout = (TimeSpan)input.InArgs[0];
return(new ReturnMessage(null, null, 0, input.LogicalCallContext, input));
}
if (input.MethodName == "get_OperationTimeout")
{
return(new ReturnMessage(OperationTimeout, null, 0, input.LogicalCallContext, input));
}
}
MethodResponse methodReturn;
OperationDispatchBase op;
if (_router._operations.TokenToOperation.TryGetValue(input.MethodBase.MetadataToken, out op))
{
var r = new MessageRequest();
if (_router._session != null)
{
r.Session = _router._session;
}
r.Operation = op.Identifier;
var ps = new List <RpcParamData>();
for (int i = 0; i < op.Params.Count; i++)
{
var paramIdentifier = i;//TODO: try to make this connection with more inderect way
var stream = new MemoryStream();
_router._serializer.WriteObject(stream, input.GetInArg(i));
ps.Add(new RpcParamData {
Identifier = paramIdentifier, Data = stream.ToArray()
});
}
r.Data.AddRange(ps.ToArray());
var rData = new MemoryStream();
_router._serializer.WriteObject(rData, r);
if (op is AsyncOperationDispatch)
{
object asyncState = input.GetInArg(op.Params.Count + 1);
var asyncCallback = (AsyncCallback)input.GetInArg(op.Params.Count);
Task task = Tasks.Factory.StartNew((x) =>
{
try
{
_router._operationPending.Reset();
byte[] result = null;
result = ExecuteRequest(rData);
var reply =
(Message)
_encoder.ReadObject(new MemoryStream(result),
typeof(Message));
applyReplyProcessing(reply);
}
catch (ExternalException ex)
{
throw HandleCommunicationError(ex);
}
catch (Exception ex)
{
throw;
}
finally
{
_router._operationPending.Set();
}
return(new ReturnMessage(null, null, 0, null, input));
}, asyncState);
task.ContinueWith(x =>
{
//TODO: do exception handling like in WCF
RpcTrace.Error(x.Exception);
if (asyncCallback != null)
{
asyncCallback(x);
}
}, TaskContinuationOptions.OnlyOnFaulted);
task.ContinueWith(x =>
{
if (asyncCallback != null)
{
asyncCallback(x);
}
}, TaskContinuationOptions.OnlyOnRanToCompletion);
return(new ReturnMessage(task, null, 0, null, input));
}
else if (op.Operation.IsOneWay)
{
Debug.Assert(op.MethodInfo.ReturnType == typeof(void));
try
{
_router._operationPending.Reset();
byte[] result = null;
result = ExecuteRequest(rData);
var reply = (Message)_encoder.ReadObject(new MemoryStream(result), typeof(Message));
try
{
applyReplyProcessing(reply);
}
catch (Exception ex)
{
return(new ReturnMessage(ex, input));
}
}
catch (ExternalException ex)
{
throw HandleCommunicationError(ex);
}
catch (Exception ex)
{
throw;
}
finally
{
_router._operationPending.Set();
}
return(new ReturnMessage(null, null, 0, null, input));
}
try
{
_router._operationPending.Reset();
byte[] result = null;
//BUG: using tasks adds 30% to simple local calls with bytes, and 10% longer then WCF...
//TODO: use native MS-RPC timeouts
//Task operation = Task.Factory.StartNew(() =>
// {
result = ExecuteRequest(rData);
// });
//var ended = operation.Wait(_operationTimeout);
//if (!ended)
//{
// var timeourError =
// new TimeoutException(
// string.Format("The request channel timed out attempting to send after {0}",
// _operationTimeout));
// return new ReturnMessage(timeourError,input);
//}
var reply = (Message)_encoder.ReadObject(new MemoryStream(result), typeof(Message));
applyReplyProcessing(reply);
if (op.MethodInfo.ReturnType != typeof(void))
{
var retVal = _router._serializer.ReadObject(new MemoryStream(reply.Data), op.MethodInfo.ReturnType);
var ret = new ReturnMessage(retVal, null, 0, null, input);
return(ret);
}
}
catch (ExternalException ex)
{
var wrappedException = HandleCommunicationError(ex);
return(new ReturnMessage(wrappedException, input));
}
catch (Exception ex)
{
return(new ReturnMessage(ex, input));
}
finally
{
_router._operationPending.Set();
}
return(new ReturnMessage(null, null, 0, null, input));
}
//var error = new ActionNotSupportedException();
//RpcTrace.Error();
throw new InvalidOperationException(string.Format("Cannot find operation {0} on service {1}", input.MethodName, _service));
}