public static Task <State> ExecuteAsync(this IWorkflowRegistry registry, string name, State state, CancellationToken cancellationToken)
{
if (String.IsNullOrEmpty(name))
{
throw new ArgumentNullException(nameof(name));
}
var workflow = registry.GetWorkflow(name);
if (workflow == null)
{
throw new WorkflowExecutionException($"No workflow named '{name}' was specified in the registry");
}
return(workflow.ExecuteAsync(state, cancellationToken));
}