private void Field_PreloadVariable(object sender, PreloadVariableEventArgs e)
{
if (IsDataLoading)
{
IsPaddingTask = true;
return;
}
if (IsReloading) return;
if (CacheProvider != null)
CurrentCache = CacheProvider;
else
CurrentCache = new DynamicCache();
IsDataLoading = true;
Task task = Task.Factory.StartNew(() =>
{
if (CurrentCache.GetOutOfDate(e.Keys, FieldName))
{//如果不是在最新狀態就呼叫 GetDataAsync 讀取資料，並更新到 Cache 中。
if (e.Keys.Count() <= 0) return; //如果沒有資料就不執行。
IEnumerable<Value> values = GetDataAsync(e.Keys);
HashSet<string> resultSet = new HashSet<string>();
foreach (Value v in values)
{
CurrentCache.FillProperty(v.Id, FieldName, v.Val);
resultSet.Add(v.Id);
}
HashSet<string> clearSet = new HashSet<string>(e.Keys);
clearSet.ExceptWith(resultSet);
//將沒有回傳的 Id 值清空。
foreach (string id in clearSet)
CurrentCache.FillProperty(id, FieldName, string.Empty);
}
}, new CancellationToken(), TaskCreationOptions.PreferFairness, TaskScheduler.Default);
task.ContinueWith((x) =>
{
IsDataLoading = false;
if (IsPaddingTask)
{
IsPaddingTask = false;
Field.Reload();
return;
}
if (x.Exception != null)
RTOut.WriteError(x.Exception);
else
{
IsReloading = true;
Field.Reload();
IsReloading = false;
}
CurrentCache = null;
}, UISyncContext);
}
private void Field_PreloadVariable(object sender, PreloadVariableEventArgs e)
{
if (IsDataLoading)
{
IsPaddingTask = true;
return;
}
if (IsReloading)
{
return;
}
if (CacheProvider != null)
{
CurrentCache = CacheProvider;
}
else
{
CurrentCache = new DynamicCache();
}
IsDataLoading = true;
Task task = Task.Factory.StartNew(() =>
{
if (CurrentCache.GetOutOfDate(e.Keys, FieldName))
{//如果不是在最新狀態就呼叫 GetDataAsync 讀取資料，並更新到 Cache 中。
if (e.Keys.Count() <= 0)
{
return; //如果沒有資料就不執行。
}
IEnumerable <Value> values = GetDataAsync(e.Keys);
HashSet <string> resultSet = new HashSet <string>();
foreach (Value v in values)
{
CurrentCache.FillProperty(v.Id, FieldName, v.Val);
resultSet.Add(v.Id);
}
HashSet <string> clearSet = new HashSet <string>(e.Keys);
clearSet.ExceptWith(resultSet);
//將沒有回傳的 Id 值清空。
foreach (string id in clearSet)
{
CurrentCache.FillProperty(id, FieldName, string.Empty);
}
}
}, new CancellationToken(), TaskCreationOptions.PreferFairness, TaskScheduler.Default);
task.ContinueWith((x) =>
{
IsDataLoading = false;
if (IsPaddingTask)
{
IsPaddingTask = false;
Field.Reload();
return;
}
if (x.Exception != null)
{
RTOut.WriteError(x.Exception);
}
else
{
IsReloading = true;
Field.Reload();
IsReloading = false;
}
CurrentCache = null;
}, UISyncContext);
}
