public async Task <UiFlowScreenModel> RefreshStepDataAsync(IUiFlowContextData contextData,
UiFlowScreenModel originalScreenModel, IDictionary <string, object> stepViewCustomizations = null)
{
TraceBegin(nameof(RefreshStepDataAsync), contextData);
var result = originalScreenModel;
if (!_stepDataLoaded)
{
await _syncLock.AsyncCriticalSection(async() =>
{
if (!_stepDataLoaded)
{
LifecycleStage = ScreenLifecycleStage.RefreshingStepData;
_stepDataLoaded = true;
var onRefreshStepDataAsync =
await OnRefreshModelAsync(contextData, originalScreenModel, stepViewCustomizations);
await OnScreenLoadCompletedAsync(contextData);
result = onRefreshStepDataAsync;
LifecycleStage = ScreenLifecycleStage.RefreshStepDataCompleted;
}
}
);
}
TraceEnd(nameof(RefreshStepDataAsync), contextData);
return(result);
}
public static async Task AsyncCriticalSection(this SemaphoreSlim src, Func <Task> payload)
{
await src.AsyncCriticalSection(async() =>
{
await payload();
return(true);
});
}