public void Unload()
{
using (new WorkflowTraceTransfer(this.InstanceId))
{
if (_runtime == null || _runtime.GetService <WorkflowPersistenceService>() == null)
{
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, ExecutionStringManager.MissingPersistenceService, this.InstanceId));
}
while (true)
{
WorkflowExecutor executor = _runtime.Load(this);
if (executor.IsInstanceValid)
{
try
{
executor.Unload();
return;
}
catch (InvalidOperationException)
{
if (executor.IsInstanceValid)
{
throw;
}
}
catch (ExecutorLocksHeldException e)
{
try
{
e.Handle.WaitOne(/* maybe should have a timeout here?*/);
}
catch (ObjectDisposedException)
{
// If an ObjectDisposedException is thrown because
// the WaitHandle has already closed, nothing to worry
// about. Move on.
}
}
}
}
}
}