private static object[] ProcessEvent(HandleExternalEventActivity activity, ActivityExecutionContext context, object msg, Type interfaceType, string operation)
{
IMethodMessage message = msg as IMethodMessage;
if (message == null)
{
Exception excp = msg as Exception;
if (excp != null)
{
throw excp;
}
throw new InvalidOperationException(SR.GetString(SR.Error_InvalidLocalServiceMessage));
}
CorrelationService.InvalidateCorrelationToken(activity, interfaceType, operation, message.Args);
IdentityContextData identityData =
(IdentityContextData)message.LogicalCallContext.GetData(IdentityContextData.IdentityContext);
ValidateRoles(activity, identityData.Identity);
if (ProcessEventParameters(activity.ParameterBindings, message, interfaceType, operation))
{
return(message.Args);
}
return(null);
}
protected override void PreFilterProperties(IDictionary properties)
{
base.PreFilterProperties(properties);
object corrRefProperty = properties["CorrelationToken"];
HandleExternalEventActivity activity = base.Activity as HandleExternalEventActivity;
this.AddRemoveCorrelationToken(activity.InterfaceType, properties, corrRefProperty);
Type interfaceType = activity.InterfaceType;
if (interfaceType != null)
{
this.AddRemoveCorrelationToken(interfaceType, properties, corrRefProperty);
activity.GetParameterPropertyDescriptors(properties);
}
}
public override ValidationErrorCollection Validate(ValidationManager manager, object obj)
{
HandleExternalEventActivity eventSink = obj as HandleExternalEventActivity;
if (eventSink == null)
{
throw new ArgumentException(SR.GetString(SR.Error_UnexpectedArgumentType, typeof(HandleExternalEventActivity).FullName), "obj");
}
ValidationErrorCollection validationErrors = base.Validate(manager, obj);
validationErrors.AddRange(CorrelationSetsValidator.Validate(manager, obj));
validationErrors.AddRange(ParameterBindingValidator.Validate(manager, obj));
return(validationErrors);
}
void IActivityEventListener <QueueEventArgs> .OnEvent(object sender, QueueEventArgs e)
{
ActivityExecutionContext context = (ActivityExecutionContext)sender;
HandleExternalEventActivity activity = context.Activity as HandleExternalEventActivity;
if (activity.ExecutionStatus == ActivityExecutionStatus.Executing)
{
object[] args = null;
if (InboundActivityHelper.ExecuteForActivity(this, context, this.InterfaceType, this.EventName, out args) == ActivityExecutionStatus.Closed)
{
this.RaiseEvent(args);
this.UnsubscribeForActivity(context);
context.CloseActivity();
}
}
}
internal static ActivityExecutionStatus ExecuteForActivity(HandleExternalEventActivity activity, ActivityExecutionContext context, Type interfaceType, string operation, out object[] args)
{
WorkflowQueuingService queueSvcs = (WorkflowQueuingService)context.GetService(typeof(WorkflowQueuingService));
args = null;
IComparable queueId = CorrelationService.ResolveQueueName(activity, interfaceType, operation);
if (queueId != null)
{
WorkflowQueue queue;
object msg = DequeueMessage(queueId, queueSvcs, activity, out queue);
CorrelationService.UninitializeFollowers(interfaceType, operation, queue);
if (msg != null)
{
args = ProcessEvent(activity, context, msg, interfaceType, operation);
return(ActivityExecutionStatus.Closed);
}
}
return(ActivityExecutionStatus.Executing);
}
protected override void PreFilterProperties(IDictionary properties)
{
base.PreFilterProperties(properties);
object corrRefProperty = properties["CorrelationToken"];
HandleExternalEventActivity eventSink = Activity as HandleExternalEventActivity;
AddRemoveCorrelationToken(eventSink.InterfaceType, properties, corrRefProperty);
Type type = eventSink.InterfaceType;
if (type == null)
{
return;
}
AddRemoveCorrelationToken(type, properties, corrRefProperty);
eventSink.GetParameterPropertyDescriptors(properties);
}
void IActivityEventListener <QueueEventArgs> .OnEvent(object sender, QueueEventArgs e)
{
ActivityExecutionContext context = (ActivityExecutionContext)sender;
HandleExternalEventActivity activity = context.Activity as HandleExternalEventActivity;
// if activity is not scheduled for execution do not dequeue the message
if (activity.ExecutionStatus != ActivityExecutionStatus.Executing)
{
return;
}
object[] args = null;
ActivityExecutionStatus status = InboundActivityHelper.ExecuteForActivity(this, context, this.InterfaceType, this.EventName, out args);
if (status == ActivityExecutionStatus.Closed)
{
RaiseEvent(args);
UnsubscribeForActivity(context);
context.CloseActivity();
}
}
protected override void OnActivityChanged(ActivityChangedEventArgs e)
{
base.OnActivityChanged(e);
if (e.Member != null)
{
if (e.Member.Name == "InterfaceType")
{
if (Activity.Site != null)
{
Type interfaceType = e.NewValue as Type;
if (interfaceType != null)
{
new ExternalDataExchangeInterfaceTypeFilterProvider(Activity.Site).CanFilterType(interfaceType, true);
}
HandleExternalEventActivity eventSinkActivity = e.Activity as HandleExternalEventActivity;
PropertyDescriptorUtils.SetPropertyValue(Activity.Site, TypeDescriptor.GetProperties(Activity)["EventName"], Activity, String.Empty);
IExtendedUIService extUIService = (IExtendedUIService)Activity.Site.GetService(typeof(IExtendedUIService));
if (extUIService == null)
{
throw new Exception(SR.GetString(SR.General_MissingService, typeof(IExtendedUIService).FullName));
}
}
}
else if ((e.Member.Name == "EventName") &&
e.Activity is HandleExternalEventActivity)
{
(e.Activity as HandleExternalEventActivity).ParameterBindings.Clear();
}
if (e.Member.Name == "InterfaceType" || e.Member.Name == "EventName" || e.Member.Name == "CorrelationToken")
{
TypeDescriptor.Refresh(e.Activity);
}
}
}
