public static T RequestResponse <T>(Type workflowType, object request, Dictionary <string, object> namedArgumentValues, int timeoutInSec, string identity) where T : class
{
// create workflow invoker
Invoker invoker = WorkflowInvoker.Create(workflowType, namedArgumentValues);
// pass request object to the workflow
invoker.RaiseRequestEvent(request, identity);
// wait for response from workflow
invoker.WaitForResponse(timeoutInSec);
// response
return(invoker.GetResponse <T>());
}
public void SendMessage(IMethodMessage message)
{
// identity
string identity = WorkflowInvoker.Identity();
if (!string.IsNullOrEmpty(identity) && message.LogicalCallContext != null)
{
// workaround to create an IdentityContextData for LogicalCallContext
Type type = Type.GetType("System.Workflow.Activities.IdentityContextData, System.Workflow.Activities, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35");
object identityContextData = Activator.CreateInstance(type, BindingFlags.CreateInstance | BindingFlags.ExactBinding | BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public, null, new object[] { identity }, CultureInfo.CurrentCulture);
message.LogicalCallContext.SetData("__identitycontext__", identityContextData);
}
// contract type
Type contractType = Type.GetType(message.TypeName);
if (contractType == null)
{
throw new TypeLoadException(message.TypeName);
}
// create queue name
EventQueueName qn = new EventQueueName(contractType, message.MethodName);
// enqueue item
if (_bStateMachine)
{
if (_localservice.Scheduler != null)
{
_localservice.Scheduler.RunWorkflow(_instance.InstanceId);
}
_instance.EnqueueItemOnIdle(qn, message, null, null);
}
else
{
_instance.EnqueueItem(qn, message, null, null);
}
if (_localservice.Scheduler != null)
{
_localservice.Scheduler.RunWorkflow(_instance.InstanceId);
}
}
/// <summary>
///
/// </summary>
public void ProcessMessage(IMessage requestMessage, ITransportHeaders requestHeaders, Stream requestStream,
out ITransportHeaders responseHeaders, out Stream responseStream)
{
object returnValue = null;
responseHeaders = null;
responseStream = new MemoryStream();
IMessage responseMsg = null;
IMethodCallMessage mcm = requestMessage as IMethodCallMessage;
BinaryFormatter bf = new BinaryFormatter();
try
{
if (_endpoint.StartsWith(WorkflowDefaults.WorkflowLocalhost))
{
#region Invoke local Workflow
LogicalWorkflowContext lwc = LCC.LogicalWorkflowContext;
Guid workflowInstanceId = lwc.GetAndClearWorkflowId();
bool bGetWorkflowById = !workflowInstanceId.Equals(Guid.Empty);
// create workflow
Invoker invoker = null;
if (bGetWorkflowById)
{
invoker = WorkflowInvoker.Create(workflowInstanceId);
}
else
{
string endpoint = _endpoint.Replace(WorkflowDefaults.WorkflowLocalhost, "").Trim('/');
Type workflowType = RemotingServices.GetServerTypeForUri(endpoint);
invoker = WorkflowInvoker.Create(workflowType, lwc.WorkflowInitData);
}
// send remoting message
invoker.SendMessage(mcm);
// handle response
if (RemotingServices.IsOneWay(mcm.MethodBase) == false)
{
invoker.WaitForResponse(_Sender.TimeOut);
returnValue = invoker.GetResponse <object>();
}
#endregion
}
else if (_endpoint.StartsWith(WorkflowDefaults.WorkflowByWCF))
{
#region Invoke remote Workflow by WCF
try
{
string endpoint = _endpoint.Replace(WorkflowDefaults.WorkflowByWCF, "").Trim('/');
using (ChannelFactory2 factory = new ChannelFactory2(Type.GetType(mcm.TypeName), endpoint))
{
object tp = factory.CreateChannel();
using (OperationContextScope scope = new OperationContextScope(tp as IContextChannel))
{
// CallContext over the loosely coupled contract (LogicalWorkflowContext and Unknown)
object lwc = LCC.GetLogicalWorkflowContext;
if (lwc != null)
{
MessageHeader header = MessageHeader.CreateHeader("LogicalWorkflowContext", "RKiss.WorkflowRemoting", lwc, false, "WorkflowRemoting");
OperationContext.Current.OutgoingMessageHeaders.Add(header);
}
if (!string.IsNullOrEmpty(Sender.CallContextActor))
{
IDictionaryEnumerator enumerator = LCC.GetDataContract().GetEnumerator();
while (enumerator.MoveNext())
{
// skip it
if (enumerator.Value is LogicalWorkflowContext)
{
continue;
}
DataContractAttribute dca = enumerator.Key as DataContractAttribute;
MessageHeader header = MessageHeader.CreateHeader(dca.Name, dca.Namespace, enumerator.Value, false, Sender.CallContextActor);
OperationContext.Current.OutgoingMessageHeaders.Add(header);
}
}
// action
returnValue = factory.InvokeMethod(mcm.MethodName, mcm.Args);
}
factory.Close();
}
}
catch (TargetInvocationException ex)
{
throw ex.InnerException;
}
catch (Exception ex)
{
throw ex;
}
#endregion
}
else
{
throw new InvalidOperationException("No supported schema");
}
// return value
responseMsg = (IMessage) new ReturnMessage(returnValue, null, 0, null, mcm);
}
catch (System.ServiceModel.FaultException fe)
{
Exception ex = new Exception(fe.Message);
ex.GetType().InvokeMember("_stackTraceString", BindingFlags.SetField | BindingFlags.NonPublic | BindingFlags.Instance, null, ex, new object[] { fe.ToString() });
responseMsg = new ReturnMessage(ex, mcm);
}
catch (Exception ex)
{
responseMsg = new ReturnMessage(ex, mcm);
}
finally
{
#region serialize IMessage response to return back
bf.Serialize(responseStream, responseMsg);
responseStream.Position = 0;
responseHeaders = requestHeaders;
#endregion
}
}
/// <summary>
///
/// </summary>
public ServerProcessing ProcessMessage(IServerChannelSinkStack sinkStack, IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream,
out IMessage responseMsg, out ITransportHeaders responseHeaders, out Stream responseStream)
{
// scope state
ServerProcessing servproc = ServerProcessing.Complete;
responseMsg = null;
responseHeaders = null;
responseStream = new MemoryStream();
IMethodCallMessage mcm = null;
BinaryFormatter bf = new BinaryFormatter();
try
{
//Are we in the business?
if (_Next != null)
{
if (requestMsg == null && requestStream != null)
{
// we are supporting only binary formatter
requestMsg = (IMessage)bf.Deserialize(requestStream);
requestStream.Close();
}
mcm = requestMsg as IMethodCallMessage;
if (mcm == null)
{
throw new NullReferenceException("IMethodCallMessage after deserialization");
}
// LogicalCallContext
LCC.CopyFrom(mcm);
LogicalWorkflowContext lwc = LCC.LogicalWorkflowContext;
Guid workflowInstanceId = lwc.GetAndClearWorkflowId();
bool bGetWorkflowById = !workflowInstanceId.Equals(Guid.Empty);
// create workflow
Invoker invoker = null;
if (bGetWorkflowById)
{
invoker = WorkflowInvoker.Create(workflowInstanceId);
}
else
{
string endpoint = mcm.Uri;
if (string.IsNullOrEmpty(endpoint))
{
endpoint = requestHeaders["__RequestUri"] as string;
}
if (string.IsNullOrEmpty(endpoint))
{
throw new NullReferenceException("Internal error - missing endpoint");
}
// create workflow instance
Type workflowType = RemotingServices.GetServerTypeForUri(endpoint.TrimStart('/'));
invoker = WorkflowInvoker.Create(workflowType, lwc.WorkflowInitData);
}
// send remoting message to the workflow
invoker.SendMessage(mcm);
// handle response
if (!RemotingServices.IsOneWay(mcm.MethodBase))
{
// wait for response
invoker.WaitForResponse(_Provider.TimeOut);
object response = invoker.GetResponse <object>();
// return message back to the caller (Note that this version is not allow to change a CallContext!!)
responseMsg = (IMessage) new ReturnMessage(response, null, 0, null, mcm);
}
}
else
{
throw new RemotingException("Internal error in the channel stack");
}
}
catch (Exception ex)
{
Trace.WriteLine(ex);
responseMsg = (IMessage) new ReturnMessage(ex, mcm);
}
finally
{
responseHeaders = requestHeaders;
if (responseMsg != null)
{
// serialize response to the wire transport
bf.Serialize(responseStream, responseMsg);
responseStream.Position = 0;
}
}
return(servproc);
}
