public void EventHandler(object sender, ExternalDataEventArgs eventArgs)
{
if (eventArgs == null)
{
throw new ArgumentNullException("eventArgs");
}
try
{
object workItem;
IPendingWork workHandler;
object[] args = this.enqueueWrapper.PrepareEventArgsArray(sender, eventArgs, out workItem, out workHandler);
EventQueueName key = GetKey(args);
String securityIdentifier = null;
if (eventArgs.Identity == null)
{
IIdentity identity = System.Threading.Thread.CurrentPrincipal.Identity;
WindowsIdentity windowsIdentity = identity as WindowsIdentity;
if (windowsIdentity != null && windowsIdentity.User != null)
{
securityIdentifier = windowsIdentity.User.Translate(typeof(NTAccount)).ToString();
}
else if (identity != null)
{
securityIdentifier = identity.Name;
}
eventArgs.Identity = securityIdentifier;
}
else
{
securityIdentifier = eventArgs.Identity;
}
MethodMessage message = new MethodMessage(this.proxiedType, this.eventName, args, securityIdentifier);
WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "Firing event {0} for instance {1}", this.eventName, eventArgs.InstanceId);
this.enqueueWrapper.DeliverMessage(eventArgs, key, message, workItem, workHandler);
}
catch (Exception e)
{
if (ExternalDataExchangeService.IsIrrecoverableException(e))
{
throw;
}
else
{
throw new EventDeliveryFailedException(SR.GetString(SR.Error_EventDeliveryFailedException, this.proxiedType, this.eventName, eventArgs.InstanceId), e);
}
}
}
//Back - off logic for conflicting workflow load across workflow runtime boundaries.
static void SafeEnqueueItem(WorkflowInstance instance, EventQueueName key, MethodMessage message)
{
while (true) //When Execution times out ASP.NET going to forcefully plung this request.
{
try
{
instance.EnqueueItem(key, message, null, null);
return;
}
catch (WorkflowOwnershipException)
{
WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Warning, 0, String.Format(System.Globalization.CultureInfo.InvariantCulture, "Workflow Web Host Encountered Workflow Instance Ownership conflict for instanceid {0}.", instance.InstanceId));
//Back-off for 1/2 sec. Should we make this configurable?
System.Threading.Thread.Sleep(500);
continue;
}
}
}
public void EventHandler(object sender, ExternalDataEventArgs eventArgs)
{
if (eventArgs == null)
{
throw new ArgumentNullException("eventArgs");
}
try
{
object obj2;
IPendingWork work;
object[] objArray = this.enqueueWrapper.PrepareEventArgsArray(sender, eventArgs, out obj2, out work);
EventQueueName key = this.GetKey(objArray);
string name = null;
if (eventArgs.Identity == null)
{
IIdentity identity = Thread.CurrentPrincipal.Identity;
WindowsIdentity identity2 = identity as WindowsIdentity;
if ((identity2 != null) && (identity2.User != null))
{
name = identity2.User.Translate(typeof(NTAccount)).ToString();
}
else if (identity != null)
{
name = identity.Name;
}
eventArgs.Identity = name;
}
else
{
name = eventArgs.Identity;
}
MethodMessage message = new MethodMessage(this.proxiedType, this.eventName, objArray, name);
WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "Firing event {0} for instance {1}", new object[] { this.eventName, eventArgs.InstanceId });
this.enqueueWrapper.DeliverMessage(eventArgs, key, message, obj2, work);
}
catch (Exception exception)
{
if (ExternalDataExchangeService.IsIrrecoverableException(exception))
{
throw;
}
throw new EventDeliveryFailedException(SR.GetString("Error_EventDeliveryFailedException", new object[] { this.proxiedType, this.eventName, eventArgs.InstanceId }), exception);
}
}
public void EventHandler(object sender, ExternalDataEventArgs eventArgs)
{
if (eventArgs == null)
{
throw new ArgumentNullException("eventArgs");
}
try
{
object obj2;
IPendingWork work;
object[] objArray = this.enqueueWrapper.PrepareEventArgsArray(sender, eventArgs, out obj2, out work);
EventQueueName key = this.GetKey(objArray);
string name = null;
if (eventArgs.Identity == null)
{
IIdentity identity = Thread.CurrentPrincipal.Identity;
WindowsIdentity identity2 = identity as WindowsIdentity;
if ((identity2 != null) && (identity2.User != null))
{
name = identity2.User.Translate(typeof(NTAccount)).ToString();
}
else if (identity != null)
{
name = identity.Name;
}
eventArgs.Identity = name;
}
else
{
name = eventArgs.Identity;
}
MethodMessage message = new MethodMessage(this.proxiedType, this.eventName, objArray, name);
WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "Firing event {0} for instance {1}", new object[] { this.eventName, eventArgs.InstanceId });
this.enqueueWrapper.DeliverMessage(eventArgs, key, message, obj2, work);
}
catch (Exception exception)
{
if (ExternalDataExchangeService.IsIrrecoverableException(exception))
{
throw;
}
throw new EventDeliveryFailedException(SR.GetString("Error_EventDeliveryFailedException", new object[] { this.proxiedType, this.eventName, eventArgs.InstanceId }), exception);
}
}
private static MethodMessage PrepareMessage(Type interfaceType, String operation, object[] parameters, bool responseRequired)
{
// construct IMethodMessage object
String securityIdentifier = null;
IIdentity identity = System.Threading.Thread.CurrentPrincipal.Identity;
WindowsIdentity windowsIdentity = identity as WindowsIdentity;
if (windowsIdentity != null && windowsIdentity.User != null)
{
securityIdentifier = windowsIdentity.User.Translate(typeof(NTAccount)).ToString();
}
else if (identity != null)
{
securityIdentifier = identity.Name;
}
MethodMessage msg = new MethodMessage(interfaceType, operation, parameters, securityIdentifier, responseRequired);
return(msg);
}
public void EventHandler(object sender, ExternalDataEventArgs eventArgs)
{
if (eventArgs == null)
{
throw new ArgumentNullException("eventArgs");
}
try
{
object workItem;
IPendingWork workHandler;
object[] args = this.enqueueWrapper.PrepareEventArgsArray(sender, eventArgs, out workItem, out workHandler);
EventQueueName key = GetKey(args);
String securityIdentifier = null;
if (eventArgs.Identity == null)
{
IIdentity identity = System.Threading.Thread.CurrentPrincipal.Identity;
WindowsIdentity windowsIdentity = identity as WindowsIdentity;
if (windowsIdentity != null && windowsIdentity.User != null)
securityIdentifier = windowsIdentity.User.Translate(typeof(NTAccount)).ToString();
else if (identity != null)
securityIdentifier = identity.Name;
eventArgs.Identity = securityIdentifier;
}
else
{
securityIdentifier = eventArgs.Identity;
}
MethodMessage message = new MethodMessage(this.proxiedType, this.eventName, args, securityIdentifier);
WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Information, 0, "Firing event {0} for instance {1}", this.eventName, eventArgs.InstanceId);
this.enqueueWrapper.DeliverMessage(eventArgs, key, message, workItem, workHandler);
}
catch (Exception e)
{
if (ExternalDataExchangeService.IsIrrecoverableException(e))
{
throw;
}
else
{
throw new EventDeliveryFailedException(SR.GetString(SR.Error_EventDeliveryFailedException, this.proxiedType, this.eventName, eventArgs.InstanceId), e);
}
}
}
protected Object[] Invoke(Type interfaceType, String methodName, bool isActivation, Object[] parameters)
{
Guid workflowInstanceId = GetWorkflowInstanceId(ref isActivation);
WorkflowInstance wfInstance;
EventQueueName key = new EventQueueName(interfaceType, methodName);
MethodInfo mInfo = interfaceType.GetMethod(methodName);
bool responseRequired = (mInfo.ReturnType != typeof(void));
if (!responseRequired)
{
foreach (ParameterInfo parameter in mInfo.GetParameters())
{
if (parameter.ParameterType.IsByRef || parameter.IsOut)
{
responseRequired = true;
break;
}
}
}
MethodMessage methodMessage = PrepareMessage(interfaceType, methodName, parameters, responseRequired);
EventHandler <WorkflowTerminatedEventArgs> workflowTerminationHandler = null;
EventHandler <WorkflowCompletedEventArgs> workflowCompletedHandler = null;
try
{
if (isActivation)
{
wfInstance = WorkflowRuntime.CreateWorkflow(this.workflowType, null, workflowInstanceId);
SafeEnqueueItem(wfInstance, key, methodMessage);
wfInstance.Start();
}
else
{
wfInstance = WorkflowRuntime.GetWorkflow(workflowInstanceId);
SafeEnqueueItem(wfInstance, key, methodMessage);
}
bool workflowTerminated = false;
//Handler for workflow termination in b/w outstanding req-response.
workflowTerminationHandler = delegate(Object sender, WorkflowTerminatedEventArgs e)
{
if (e.WorkflowInstance.InstanceId.Equals(workflowInstanceId))
{
methodMessage.SendException(e.Exception);
workflowTerminated = true;
}
};
workflowCompletedHandler = delegate(Object sender, WorkflowCompletedEventArgs e)
{
if (e.WorkflowInstance.InstanceId.Equals(workflowInstanceId))
{
methodMessage.SendException(new ApplicationException(SR.GetString(System.Globalization.CultureInfo.CurrentCulture, SR.Error_WorkflowCompleted)));
}
};
WorkflowRuntime.WorkflowTerminated += workflowTerminationHandler;
WorkflowRuntime.WorkflowCompleted += workflowCompletedHandler;
ManualWorkflowSchedulerService scheduler = WorkflowRuntime.GetService <ManualWorkflowSchedulerService>();
if (scheduler != null)
{
scheduler.RunWorkflow(wfInstance.InstanceId);
}
if (!responseRequired)
{
// no ret, out or ref
return(new Object[] { });
}
IMethodResponseMessage response = methodMessage.WaitForResponseMessage();
if (response.Exception != null)
{
if (!workflowTerminated)
{
throw response.Exception;
}
else
{
throw new ApplicationException(SR.GetString(System.Globalization.CultureInfo.CurrentCulture, SR.Error_WorkflowTerminated), response.Exception);
}
}
if (response.OutArgs != null)
{
return(((ArrayList)response.OutArgs).ToArray());
}
else
{
return new Object[] { }
};
}
finally
{
if (workflowTerminationHandler != null)
{
WorkflowRuntime.WorkflowTerminated -= workflowTerminationHandler;
}
if (workflowCompletedHandler != null)
{
WorkflowRuntime.WorkflowCompleted -= workflowCompletedHandler;
}
}
}
//Back - off logic for conflicting workflow load across workflow runtime boundaries.
static void SafeEnqueueItem(WorkflowInstance instance, EventQueueName key, MethodMessage message)
{
while (true) //When Execution times out ASP.NET going to forcefully plung this request.
{
try
{
instance.EnqueueItem(key, message, null, null);
return;
}
catch (WorkflowOwnershipException)
{
WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Warning, 0, String.Format(System.Globalization.CultureInfo.InvariantCulture, "Workflow Web Host Encountered Workflow Instance Ownership conflict for instanceid {0}.", instance.InstanceId));
//Back-off for 1/2 sec. Should we make this configurable?
System.Threading.Thread.Sleep(500);
continue;
}
}
}
private static MethodMessage PrepareMessage(Type interfaceType, String operation, object[] parameters, bool responseRequired)
{
// construct IMethodMessage object
String securityIdentifier = null;
IIdentity identity = System.Threading.Thread.CurrentPrincipal.Identity;
WindowsIdentity windowsIdentity = identity as WindowsIdentity;
if (windowsIdentity != null && windowsIdentity.User != null)
securityIdentifier = windowsIdentity.User.Translate(typeof(NTAccount)).ToString();
else if (identity != null)
securityIdentifier = identity.Name;
MethodMessage msg = new MethodMessage(interfaceType, operation, parameters, securityIdentifier, responseRequired);
return msg;
}
protected object[] Invoke(Type interfaceType, string methodName, bool isActivation, object[] parameters)
{
EventHandler <WorkflowCompletedEventArgs> handler3 = null;
object[] objArray;
Guid workflowInstanceId = GetWorkflowInstanceId(ref isActivation);
EventQueueName key = new EventQueueName(interfaceType, methodName);
MethodInfo method = interfaceType.GetMethod(methodName);
bool responseRequired = method.ReturnType != typeof(void);
if (!responseRequired)
{
foreach (ParameterInfo info2 in method.GetParameters())
{
if (info2.ParameterType.IsByRef || info2.IsOut)
{
responseRequired = true;
break;
}
}
}
MethodMessage methodMessage = PrepareMessage(interfaceType, methodName, parameters, responseRequired);
EventHandler <WorkflowTerminatedEventArgs> handler = null;
EventHandler <WorkflowCompletedEventArgs> handler2 = null;
try
{
WorkflowInstance workflow;
if (isActivation)
{
workflow = this.WorkflowRuntime.CreateWorkflow(this.workflowType, null, workflowInstanceId);
SafeEnqueueItem(workflow, key, methodMessage);
workflow.Start();
}
else
{
workflow = this.WorkflowRuntime.GetWorkflow(workflowInstanceId);
SafeEnqueueItem(workflow, key, methodMessage);
}
bool workflowTerminated = false;
handler = delegate(object sender, WorkflowTerminatedEventArgs e) {
if (e.WorkflowInstance.InstanceId.Equals(workflowInstanceId))
{
methodMessage.SendException(e.Exception);
workflowTerminated = true;
}
};
if (handler3 == null)
{
handler3 = delegate(object sender, WorkflowCompletedEventArgs e) {
if (e.WorkflowInstance.InstanceId.Equals(workflowInstanceId))
{
methodMessage.SendException(new ApplicationException(SR.GetString(CultureInfo.CurrentCulture, "Error_WorkflowCompleted")));
}
};
}
handler2 = handler3;
this.WorkflowRuntime.WorkflowTerminated += handler;
this.WorkflowRuntime.WorkflowCompleted += handler2;
ManualWorkflowSchedulerService service = this.WorkflowRuntime.GetService <ManualWorkflowSchedulerService>();
if (service != null)
{
service.RunWorkflow(workflow.InstanceId);
}
if (!responseRequired)
{
return(new object[0]);
}
IMethodResponseMessage message = methodMessage.WaitForResponseMessage();
if (message.Exception != null)
{
if (!workflowTerminated)
{
throw message.Exception;
}
throw new ApplicationException(SR.GetString(CultureInfo.CurrentCulture, "Error_WorkflowTerminated"), message.Exception);
}
if (message.OutArgs != null)
{
return(((ArrayList)message.OutArgs).ToArray());
}
objArray = new object[0];
}
finally
{
if (handler != null)
{
this.WorkflowRuntime.WorkflowTerminated -= handler;
}
if (handler2 != null)
{
this.WorkflowRuntime.WorkflowCompleted -= handler2;
}
}
return(objArray);
}
private static void SafeEnqueueItem(WorkflowInstance instance, EventQueueName key, MethodMessage message)
{
Label_0000:
try
{
instance.EnqueueItem(key, message, null, null);
}
catch (WorkflowOwnershipException)
{
WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Warning, 0, string.Format(CultureInfo.InvariantCulture, "Workflow Web Host Encountered Workflow Instance Ownership conflict for instanceid {0}.", new object[] { instance.InstanceId }));
Thread.Sleep(500);
goto Label_0000;
}
}
private static void SafeEnqueueItem(WorkflowInstance instance, EventQueueName key, MethodMessage message)
{
Label_0000:
try
{
instance.EnqueueItem(key, message, null, null);
}
catch (WorkflowOwnershipException)
{
WorkflowActivityTrace.Activity.TraceEvent(TraceEventType.Warning, 0, string.Format(CultureInfo.InvariantCulture, "Workflow Web Host Encountered Workflow Instance Ownership conflict for instanceid {0}.", new object[] { instance.InstanceId }));
Thread.Sleep(500);
goto Label_0000;
}
}
