protected sealed override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
{
if (executionContext == null)
{
throw new ArgumentNullException("executionContext");
}
object[] args = null;
ActivityExecutionStatus status = InboundActivityHelper.ExecuteForActivity(this, executionContext, this.InterfaceType, this.EventName, out args);
if (status == ActivityExecutionStatus.Closed)
{
RaiseEvent(args);
UnsubscribeForActivity(executionContext);
executionContext.CloseActivity();
return(status);
}
// cannot resolve queue name or message not available
// hence subscribe for message arrival
if (!this.ActivitySubscribed)
{
this.ActivitySubscribed = CorrelationService.Subscribe(executionContext, this, this.InterfaceType, this.EventName, this, this.WorkflowInstanceId);
}
return(ActivityExecutionStatus.Executing);
}
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();
}
}
}
private ActivityExecutionStatus ExecuteForActivity(ActivityExecutionContext context, Type interfaceType, string operation)
{
WorkflowQueuingService queueSvcs = (WorkflowQueuingService)context.GetService(typeof(WorkflowQueuingService));
IComparable queueId = new EventQueueName(interfaceType, operation);
if (queueId != null)
{
WorkflowQueue queue;
object msg = InboundActivityHelper.DequeueMessage(queueId, queueSvcs, this, out queue);
if (msg != null)
{
this.ProcessMessage(context, msg, interfaceType, operation);
return(ActivityExecutionStatus.Closed);
}
}
return(ActivityExecutionStatus.Executing);
}
private void ProcessMessage(ActivityExecutionContext context, object msg, Type interfaceType, string operation)
{
IMethodMessage message = msg as IMethodMessage;
if (message == null)
{
Exception exception = msg as Exception;
if (exception != null)
{
throw exception;
}
throw new ArgumentNullException("msg");
}
CorrelationService.InvalidateCorrelationToken(this, interfaceType, operation, message.Args);
IdentityContextData data = (IdentityContextData)message.LogicalCallContext.GetData("__identitycontext__");
InboundActivityHelper.ValidateRoles(this, data.Identity);
this.ProcessParameters(context, message, interfaceType, operation);
base.RaiseEvent(InputReceivedEvent, this, EventArgs.Empty);
}
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 sealed override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
{
if (executionContext == null)
{
throw new ArgumentNullException("executionContext");
}
object[] args = null;
ActivityExecutionStatus status = InboundActivityHelper.ExecuteForActivity(this, executionContext, this.InterfaceType, this.EventName, out args);
if (status == ActivityExecutionStatus.Closed)
{
this.RaiseEvent(args);
this.UnsubscribeForActivity(executionContext);
executionContext.CloseActivity();
return(status);
}
if (!this.ActivitySubscribed)
{
this.ActivitySubscribed = CorrelationService.Subscribe(executionContext, this, this.InterfaceType, this.EventName, this, base.WorkflowInstanceId);
}
return(ActivityExecutionStatus.Executing);
}